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Posted to commits@olingo.apache.org by sk...@apache.org on 2014/04/04 07:26:24 UTC

[20/51] [abbrv] git commit: [OLINGO-205, OLINGO-175] provided JSON integration tests + refactoring and fixes

[OLINGO-205, OLINGO-175] provided JSON integration tests + refactoring and fixes


Project: http://git-wip-us.apache.org/repos/asf/olingo-odata4/repo
Commit: http://git-wip-us.apache.org/repos/asf/olingo-odata4/commit/c73772f0
Tree: http://git-wip-us.apache.org/repos/asf/olingo-odata4/tree/c73772f0
Diff: http://git-wip-us.apache.org/repos/asf/olingo-odata4/diff/c73772f0

Branch: refs/heads/olingo-206-validator
Commit: c73772f041d048e0a862d95361526a801b4cb712
Parents: de591bb
Author: fmartelli <fa...@gmail.com>
Authored: Mon Mar 31 17:16:44 2014 +0200
Committer: fmartelli <fa...@gmail.com>
Committed: Mon Mar 31 17:16:44 2014 +0200

----------------------------------------------------------------------
 .../org/apache/olingo/fit/AbstractServices.java |  36 +-
 .../java/org/apache/olingo/fit/V4NorthWind.java |   5 +-
 .../org/apache/olingo/fit/V4NorthWindExt.java   |   5 +-
 .../olingo/fit/utils/AbstractJSONUtilities.java |  78 +--
 .../olingo/fit/utils/AbstractUtilities.java     |  52 +-
 .../olingo/fit/utils/AbstractXMLUtilities.java  | 149 +++---
 .../org/apache/olingo/fit/utils/Commons.java    |  27 +-
 .../apache/olingo/fit/utils/ConstantKey.java    |  67 +++
 .../org/apache/olingo/fit/utils/Constants.java  | 167 +++---
 .../apache/olingo/fit/utils/ODataVersion.java   |   2 +-
 .../fit/utils/XHTTPMethodInterceptor.java       |   5 +-
 .../olingo/fit/utils/v3/XMLUtilities.java       |   7 +-
 .../olingo/fit/utils/v4/XMLUtilities.java       |   3 +-
 .../olingo/client/api/data/ServiceDocument.java |  15 -
 .../retrieve/ODataPropertyRequestImpl.java      |   2 +-
 .../core/data/AbstractServiceDocument.java      |  33 +-
 .../data/JSONServiceDocumentDeserializer.java   |  35 +-
 .../data/XMLServiceDocumentDeserializer.java    |  33 +-
 .../core/data/v3/JSONServiceDocumentImpl.java   |  32 --
 .../core/data/v3/XMLServiceDocumentImpl.java    |  18 -
 .../core/data/v4/AbstractServiceDocument.java   |  40 --
 .../core/data/v4/JSONServiceDocumentImpl.java   |  15 -
 .../core/data/v4/XMLServiceDocumentImpl.java    |   1 -
 .../client/core/op/AbstractODataBinder.java     |  22 +-
 .../client/core/op/impl/v4/ODataBinderImpl.java |  12 +-
 .../client/core/it/v3/AsyncTestITCase.java      |   1 -
 .../it/v3/NavigationLinkCreateTestITCase.java   | 534 -------------------
 .../client/core/it/v3/PropertyTestITCase.java   |   4 +-
 .../core/it/v4/EntityRetrieveTestITCase.java    |  20 +-
 .../client/core/it/v4/EntitySetTestITCase.java  |   8 +-
 .../core/it/v4/ServiceDocumentTestITCase.java   |   8 +-
 .../client/core/v4/ServiceDocumentTest.java     |  14 +-
 .../olingo/client/core/v4/serviceDocument.json  |   1 +
 .../api/domain/ODataServiceDocument.java        |  20 -
 .../core/data/AbstractJsonDeserializer.java     |   3 +-
 .../core/data/JSONEntryDeserializer.java        |  35 +-
 .../commons/core/data/JSONFeedDeserializer.java |  28 +-
 .../olingo/commons/core/data/JSONFeedImpl.java  |  10 +-
 .../core/data/JSONODataErrorDeserializer.java   |   6 +-
 .../core/data/JSONPropertyDeserializer.java     |  30 +-
 .../primitivetype/EdmGeographyMultiPoint.java   |   1 -
 .../primitivetype/EdmGeometryCollection.java    |   1 -
 .../core/op/AbstractODataDeserializer.java      |  16 +-
 43 files changed, 558 insertions(+), 1043 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/c73772f0/fit/src/main/java/org/apache/olingo/fit/AbstractServices.java
----------------------------------------------------------------------
diff --git a/fit/src/main/java/org/apache/olingo/fit/AbstractServices.java b/fit/src/main/java/org/apache/olingo/fit/AbstractServices.java
index 237d0ae..13c6c49 100644
--- a/fit/src/main/java/org/apache/olingo/fit/AbstractServices.java
+++ b/fit/src/main/java/org/apache/olingo/fit/AbstractServices.java
@@ -24,8 +24,6 @@ import org.apache.olingo.fit.utils.AbstractJSONUtilities;
 import org.apache.olingo.fit.utils.ODataVersion;
 import org.apache.olingo.fit.utils.FSManager;
 
-import static org.apache.olingo.fit.utils.Constants.*;
-
 import org.apache.olingo.fit.methods.MERGE;
 import org.apache.olingo.fit.methods.PATCH;
 import org.apache.olingo.fit.utils.AbstractUtilities;
@@ -57,6 +55,7 @@ import javax.ws.rs.core.Response;
 import org.apache.commons.codec.binary.Base64;
 import org.apache.commons.io.IOUtils;
 import org.apache.commons.lang3.StringUtils;
+import org.apache.olingo.fit.utils.ConstantKey;
 import org.apache.olingo.fit.utils.Constants;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -71,7 +70,6 @@ public abstract class AbstractServices {
   private static final Set<ODataVersion> INITIALIZED = EnumSet.noneOf(ODataVersion.class);
 
   protected abstract ODataVersion getVersion();
-
   protected final AbstractXMLUtilities xml;
 
   protected final AbstractJSONUtilities json;
@@ -107,7 +105,8 @@ public abstract class AbstractServices {
       }
 
       return xml.createResponse(
-              FSManager.instance(getVersion()).readFile(SERVICES, acceptType), null, acceptType);
+              FSManager.instance(getVersion()).readFile(Constants.get(getVersion(), ConstantKey.SERVICES), acceptType),
+              null, acceptType);
     } catch (Exception e) {
       return xml.createFaultResponse(accept, e);
     }
@@ -122,7 +121,7 @@ public abstract class AbstractServices {
   @Path("/$metadata")
   @Produces("application/xml")
   public Response getMetadata() {
-    return getMetadata(METADATA);
+    return getMetadata(Constants.get(getVersion(), ConstantKey.METADATA));
   }
 
   /**
@@ -134,7 +133,7 @@ public abstract class AbstractServices {
   @Path("/large/$metadata")
   @Produces("application/xml")
   public Response getLargeMetadata() {
-    return getMetadata("large" + StringUtils.capitalize(METADATA));
+    return getMetadata("large" + StringUtils.capitalize(Constants.get(getVersion(), ConstantKey.METADATA)));
   }
 
   protected Response getMetadata(final String filename) {
@@ -150,7 +149,7 @@ public abstract class AbstractServices {
 //  public Response getEntityReference(@QueryParam("$id") String id){
 //    return null;
 //  }
-          
+
   /**
    * Retrieve entity reference sample.
    *
@@ -176,7 +175,8 @@ public abstract class AbstractServices {
       final String filename = Base64.encodeBase64String(path.getBytes("UTF-8"));
 
       return utils.getValue().createResponse(
-              FSManager.instance(getVersion()).readFile(Constants.REF + File.separatorChar + filename, utils.getKey()),
+              FSManager.instance(getVersion()).readFile(Constants.get(getVersion(), ConstantKey.REF)
+              + File.separatorChar + filename, utils.getKey()),
               null,
               utils.getKey());
     } catch (Exception e) {
@@ -419,15 +419,20 @@ public abstract class AbstractServices {
         builder.append(basePath);
 
         if (StringUtils.isNotBlank(orderby)) {
-          builder.append(ORDERBY).append(File.separatorChar).append(orderby).append(File.separatorChar);
+          builder.append(Constants.get(getVersion(), ConstantKey.ORDERBY)).append(File.separatorChar).
+                  append(orderby).append(File.separatorChar);
         }
 
         if (StringUtils.isNotBlank(filter)) {
-          builder.append(FILTER).append(File.separatorChar).append(filter.replaceAll("/", "."));
+          builder.append(Constants.get(getVersion(), ConstantKey.FILTER)).append(File.separatorChar).
+                  append(filter.replaceAll("/", "."));
         } else if (StringUtils.isNotBlank(skiptoken)) {
-          builder.append(SKIP_TOKEN).append(File.separatorChar).append(skiptoken);
+          builder.append(Constants.get(getVersion(), ConstantKey.SKIP_TOKEN)).append(File.separatorChar).
+                  append(skiptoken);
         } else {
-          builder.append(Commons.getLinkInfo().get(getVersion()).isSingleton(name) ? ENTITY : FEED);
+          builder.append(Commons.getLinkInfo().get(getVersion()).isSingleton(name)
+                  ? Constants.get(getVersion(), ConstantKey.ENTITY)
+                  : Constants.get(getVersion(), ConstantKey.FEED));
         }
 
         InputStream feed = FSManager.instance(getVersion()).readFile(builder.toString(), acceptType);
@@ -524,7 +529,8 @@ public abstract class AbstractServices {
 
       if (keyAsSegment) {
         entity = utils.getValue().addEditLink(
-                entity, entitySetName, Constants.DEFAULT_SERVICE_URL + entitySetName + "/" + entityId);
+                entity, entitySetName,
+                Constants.get(getVersion(), ConstantKey.DEFAULT_SERVICE_URL) + entitySetName + "/" + entityId);
       }
 
       if (StringUtils.isNotBlank(select)) {
@@ -589,7 +595,7 @@ public abstract class AbstractServices {
       final String basePath =
               entitySetName + File.separatorChar + Commons.getEntityKey(entityId) + File.separatorChar;
 
-      FSManager.instance(getVersion()).deleteFile(basePath + ENTITY);
+      FSManager.instance(getVersion()).deleteFile(basePath + Constants.get(getVersion(), ConstantKey.ENTITY));
 
       return xml.createResponse(null, null, null, Response.Status.NO_CONTENT);
     } catch (Exception e) {
@@ -1012,7 +1018,7 @@ public abstract class AbstractServices {
     final String basePath = Commons.getEntityBasePath(entitySetName, entityId);
 
     InputStream stream = FSManager.instance(getVersion()).readFile(
-            basePath + ENTITY, acceptType == null || acceptType == Accept.TEXT
+            basePath + Constants.get(getVersion(), ConstantKey.ENTITY), acceptType == null || acceptType == Accept.TEXT
             ? Accept.XML : acceptType);
 
     final AbstractUtilities utils = getUtilities(acceptType);

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/c73772f0/fit/src/main/java/org/apache/olingo/fit/V4NorthWind.java
----------------------------------------------------------------------
diff --git a/fit/src/main/java/org/apache/olingo/fit/V4NorthWind.java b/fit/src/main/java/org/apache/olingo/fit/V4NorthWind.java
index 5ef82d7..b11d3e5 100644
--- a/fit/src/main/java/org/apache/olingo/fit/V4NorthWind.java
+++ b/fit/src/main/java/org/apache/olingo/fit/V4NorthWind.java
@@ -23,7 +23,8 @@ import org.apache.olingo.fit.utils.XHTTPMethodInterceptor;
 import javax.ws.rs.Path;
 import javax.ws.rs.core.Response;
 import org.apache.cxf.interceptor.InInterceptors;
-import static org.apache.olingo.fit.utils.Constants.METADATA;
+import org.apache.olingo.fit.utils.ConstantKey;
+import org.apache.olingo.fit.utils.Constants;
 
 @Path("/V40/NorthWind.svc")
 @InInterceptors(classes = XHTTPMethodInterceptor.class)
@@ -40,7 +41,7 @@ public class V4NorthWind extends AbstractServices {
 
   @Override
   public Response getMetadata() {
-    return getMetadata("northwind-" + METADATA);
+    return getMetadata("northwind-" + Constants.get(getVersion(), ConstantKey.METADATA));
   }
 
 }

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/c73772f0/fit/src/main/java/org/apache/olingo/fit/V4NorthWindExt.java
----------------------------------------------------------------------
diff --git a/fit/src/main/java/org/apache/olingo/fit/V4NorthWindExt.java b/fit/src/main/java/org/apache/olingo/fit/V4NorthWindExt.java
index a3d60a7..b5d4bda 100644
--- a/fit/src/main/java/org/apache/olingo/fit/V4NorthWindExt.java
+++ b/fit/src/main/java/org/apache/olingo/fit/V4NorthWindExt.java
@@ -23,7 +23,8 @@ import org.apache.olingo.fit.utils.XHTTPMethodInterceptor;
 import javax.ws.rs.Path;
 import javax.ws.rs.core.Response;
 import org.apache.cxf.interceptor.InInterceptors;
-import static org.apache.olingo.fit.utils.Constants.METADATA;
+import org.apache.olingo.fit.utils.ConstantKey;
+import org.apache.olingo.fit.utils.Constants;
 import org.apache.olingo.fit.utils.ResolvingReferencesInterceptor;
 
 @Path("/V40/NorthWindExt.svc")
@@ -41,7 +42,7 @@ public class V4NorthWindExt extends AbstractServices {
 
   @Override
   public Response getMetadata() {
-    return getMetadata("northwindExt-" + METADATA);
+    return getMetadata("northwindExt-" + Constants.get(getVersion(), ConstantKey.METADATA));
   }
 
 }

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/c73772f0/fit/src/main/java/org/apache/olingo/fit/utils/AbstractJSONUtilities.java
----------------------------------------------------------------------
diff --git a/fit/src/main/java/org/apache/olingo/fit/utils/AbstractJSONUtilities.java b/fit/src/main/java/org/apache/olingo/fit/utils/AbstractJSONUtilities.java
index c62d341..9fd9096 100644
--- a/fit/src/main/java/org/apache/olingo/fit/utils/AbstractJSONUtilities.java
+++ b/fit/src/main/java/org/apache/olingo/fit/utils/AbstractJSONUtilities.java
@@ -18,8 +18,6 @@
  */
 package org.apache.olingo.fit.utils;
 
-import static org.apache.olingo.fit.utils.Constants.*;
-
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.node.ArrayNode;
@@ -61,7 +59,7 @@ public abstract class AbstractJSONUtilities extends AbstractUtilities {
     IOUtils.closeQuietly(is);
 
     for (String link : links) {
-      srcNode.set(link + JSON_NAVIGATION_SUFFIX,
+      srcNode.set(link + Constants.get(version, ConstantKey.JSON_NAVIGATION_SUFFIX),
               new TextNode(Commons.getLinksURI(version, entitySetName, entitykey, link)));
     }
 
@@ -81,10 +79,10 @@ public abstract class AbstractJSONUtilities extends AbstractUtilities {
     while (fieldIter.hasNext()) {
       final String field = fieldIter.next();
 
-      if (field.endsWith(JSON_NAVIGATION_BIND_SUFFIX)
-              || field.endsWith(JSON_NAVIGATION_SUFFIX)
-              || field.endsWith(JSON_MEDIA_SUFFIX)
-              || field.endsWith(JSON_EDITLINK_NAME)) {
+      if (field.endsWith(Constants.get(version, ConstantKey.JSON_NAVIGATION_BIND_SUFFIX))
+              || field.endsWith(Constants.get(version, ConstantKey.JSON_NAVIGATION_SUFFIX))
+              || field.endsWith(Constants.get(version, ConstantKey.JSON_MEDIA_SUFFIX))
+              || field.endsWith(Constants.get(version, ConstantKey.JSON_EDITLINK_NAME))) {
         if (field.indexOf('@') > 0) {
           links.add(field.substring(0, field.indexOf('@')));
         } else {
@@ -113,7 +111,7 @@ public abstract class AbstractJSONUtilities extends AbstractUtilities {
 
     while (fieldIter.hasNext()) {
       final Map.Entry<String, JsonNode> field = fieldIter.next();
-      if (field.getKey().endsWith(JSON_NAVIGATION_BIND_SUFFIX)) {
+      if (field.getKey().endsWith(Constants.get(version, ConstantKey.JSON_NAVIGATION_BIND_SUFFIX))) {
         final String title = field.getKey().substring(0, field.getKey().indexOf('@'));
         final List<String> hrefs = new ArrayList<String>();
         if (field.getValue().isArray()) {
@@ -148,17 +146,17 @@ public abstract class AbstractJSONUtilities extends AbstractUtilities {
     if (links != null) {
       for (String linkTitle : links.getLinkNames()) {
         // normalize link
-        srcNode.remove(linkTitle + JSON_NAVIGATION_BIND_SUFFIX);
+        srcNode.remove(linkTitle + Constants.get(version, ConstantKey.JSON_NAVIGATION_BIND_SUFFIX));
         srcNode.set(
-                linkTitle + JSON_NAVIGATION_SUFFIX,
+                linkTitle + Constants.get(version, ConstantKey.JSON_NAVIGATION_SUFFIX),
                 new TextNode(String.format("%s(%s)/%s", entitySetName, entityKey, linkTitle)));
       }
 
       for (String linkTitle : links.getInlineNames()) {
         // normalize link if exist; declare a new one if missing
-        srcNode.remove(linkTitle + JSON_NAVIGATION_BIND_SUFFIX);
+        srcNode.remove(linkTitle + Constants.get(version, ConstantKey.JSON_NAVIGATION_BIND_SUFFIX));
         srcNode.set(
-                linkTitle + JSON_NAVIGATION_SUFFIX,
+                linkTitle + Constants.get(version, ConstantKey.JSON_NAVIGATION_SUFFIX),
                 new TextNode(String.format("%s(%s)/%s", entitySetName, entityKey, linkTitle)));
 
         // remove inline
@@ -170,8 +168,8 @@ public abstract class AbstractJSONUtilities extends AbstractUtilities {
     }
 
     srcNode.set(
-            JSON_EDITLINK_NAME,
-            new TextNode(Constants.DEFAULT_SERVICE_URL + entitySetName + "(" + entityKey + ")"));
+            Constants.get(version, ConstantKey.JSON_EDITLINK_NAME), new TextNode(
+            Constants.get(version, ConstantKey.DEFAULT_SERVICE_URL) + entitySetName + "(" + entityKey + ")"));
 
     return IOUtils.toInputStream(srcNode.toString());
   }
@@ -190,8 +188,9 @@ public abstract class AbstractJSONUtilities extends AbstractUtilities {
           final String entitySetName, final String entityId, final List<String> path, final String edmType)
           throws Exception {
 
-    final InputStream src =
-            fsManager.readFile(Commons.getEntityBasePath(entitySetName, entityId) + ENTITY, Accept.JSON_FULLMETA);
+    final InputStream src = fsManager.readFile(
+            Commons.getEntityBasePath(entitySetName, entityId) + Constants.get(version, ConstantKey.ENTITY),
+            Accept.JSON_FULLMETA);
 
     final ObjectMapper mapper = new ObjectMapper();
     final JsonNode srcNode = mapper.readTree(src);
@@ -199,7 +198,9 @@ public abstract class AbstractJSONUtilities extends AbstractUtilities {
     final ObjectNode propertyNode = new ObjectNode(JsonNodeFactory.instance);
 
     if (StringUtils.isNotBlank(edmType)) {
-      propertyNode.put(JSON_ODATAMETADATA_NAME, ODATA_METADATA_PREFIX + edmType);
+      propertyNode.put(Constants.get(
+              version, ConstantKey.JSON_ODATAMETADATA_NAME),
+              Constants.get(version, ConstantKey.ODATA_METADATA_PREFIX) + edmType);
     }
 
     JsonNode jsonNode = getProperty(srcNode, path);
@@ -241,7 +242,7 @@ public abstract class AbstractJSONUtilities extends AbstractUtilities {
     final ObjectMapper mapper = new ObjectMapper();
     final JsonNode srcNode = mapper.readTree(src);
 
-    ((ObjectNode) srcNode).put(ODATA_COUNT_NAME, count);
+    ((ObjectNode) srcNode).put(Constants.get(version, ConstantKey.ODATA_COUNT_NAME), count);
 
     final ByteArrayOutputStream bos = new ByteArrayOutputStream();
     mapper.writeValue(bos, srcNode);
@@ -258,14 +259,14 @@ public abstract class AbstractJSONUtilities extends AbstractUtilities {
 
     final ObjectNode res;
 
-    final JsonNode value = node.get(JSON_VALUE_NAME);
+    final JsonNode value = node.get(Constants.get(version, ConstantKey.JSON_VALUE_NAME));
 
     if (value.isArray()) {
       res = mapper.createObjectNode();
       res.set("value", value);
-      final JsonNode next = node.get(JSON_NEXTLINK_NAME);
+      final JsonNode next = node.get(Constants.get(version, ConstantKey.JSON_NEXTLINK_NAME));
       if (next != null) {
-        res.set(JSON_NEXTLINK_NAME, next);
+        res.set(Constants.get(version, ConstantKey.JSON_NEXTLINK_NAME), next);
       }
     } else {
       res = (ObjectNode) value;
@@ -286,18 +287,18 @@ public abstract class AbstractJSONUtilities extends AbstractUtilities {
     final ObjectNode srcNode = (ObjectNode) mapper.readTree(src);
 
     final Set<String> retain = new HashSet<String>();
-    retain.add(JSON_ID_NAME);
-    retain.add(JSON_TYPE_NAME);
-    retain.add(JSON_EDITLINK_NAME);
-    retain.add(JSON_NEXTLINK_NAME);
-    retain.add(JSON_ODATAMETADATA_NAME);
-    retain.add(JSON_VALUE_NAME);
+    retain.add(Constants.get(version, ConstantKey.JSON_ID_NAME));
+    retain.add(Constants.get(version, ConstantKey.JSON_TYPE_NAME));
+    retain.add(Constants.get(version, ConstantKey.JSON_EDITLINK_NAME));
+    retain.add(Constants.get(version, ConstantKey.JSON_NEXTLINK_NAME));
+    retain.add(Constants.get(version, ConstantKey.JSON_ODATAMETADATA_NAME));
+    retain.add(Constants.get(version, ConstantKey.JSON_VALUE_NAME));
 
     for (String name : propertyNames) {
       retain.add(name);
-      retain.add(name + JSON_NAVIGATION_SUFFIX);
-      retain.add(name + JSON_MEDIA_SUFFIX);
-      retain.add(name + JSON_TYPE_SUFFIX);
+      retain.add(name + Constants.get(version, ConstantKey.JSON_NAVIGATION_SUFFIX));
+      retain.add(name + Constants.get(version, ConstantKey.JSON_MEDIA_SUFFIX));
+      retain.add(name + Constants.get(version, ConstantKey.JSON_TYPE_SUFFIX));
     }
 
     srcNode.retain(retain);
@@ -344,10 +345,11 @@ public abstract class AbstractJSONUtilities extends AbstractUtilities {
       bos.write("]".getBytes());
     }
 
-    node.set(JSON_VALUE_NAME, mapper.readTree(new ByteArrayInputStream(bos.toByteArray())));
+    node.set(Constants.get(version, ConstantKey.JSON_VALUE_NAME),
+            mapper.readTree(new ByteArrayInputStream(bos.toByteArray())));
 
     if (StringUtils.isNotBlank(next)) {
-      node.set(JSON_NEXTLINK_NAME, new TextNode(next));
+      node.set(Constants.get(version, ConstantKey.JSON_NEXTLINK_NAME), new TextNode(next));
     }
 
     return IOUtils.toInputStream(node.toString());
@@ -362,15 +364,15 @@ public abstract class AbstractJSONUtilities extends AbstractUtilities {
     final ObjectNode toBeChangedNode = (ObjectNode) mapper.readTree(toBeChanged);
     final ObjectNode replacementNode = (ObjectNode) mapper.readTree(replacement);
 
-    if (toBeChangedNode.get(linkName + JSON_NAVIGATION_SUFFIX) == null) {
+    if (toBeChangedNode.get(linkName + Constants.get(version, ConstantKey.JSON_NAVIGATION_SUFFIX)) == null) {
       throw new NotFoundException();
     }
 
-    toBeChangedNode.set(linkName, replacementNode.get(JSON_VALUE_NAME));
+    toBeChangedNode.set(linkName, replacementNode.get(Constants.get(version, ConstantKey.JSON_VALUE_NAME)));
 
-    final JsonNode next = replacementNode.get(linkName + JSON_NEXTLINK_NAME);
+    final JsonNode next = replacementNode.get(linkName + Constants.get(version, ConstantKey.JSON_NEXTLINK_NAME));
     if (next != null) {
-      toBeChangedNode.set(linkName + JSON_NEXTLINK_SUFFIX, next);
+      toBeChangedNode.set(linkName + Constants.get(version, ConstantKey.JSON_NEXTLINK_SUFFIX), next);
     }
 
     return IOUtils.toInputStream(toBeChangedNode.toString());
@@ -437,7 +439,7 @@ public abstract class AbstractJSONUtilities extends AbstractUtilities {
       }
     }
 
-    final JsonNode next = srcNode.get(JSON_NEXTLINK_NAME);
+    final JsonNode next = srcNode.get(Constants.get(version, ConstantKey.JSON_NEXTLINK_NAME));
 
     return new SimpleEntry<String, List<String>>(next == null ? null : next.asText(), links);
   }
@@ -449,7 +451,7 @@ public abstract class AbstractJSONUtilities extends AbstractUtilities {
     final ObjectNode srcNode = (ObjectNode) mapper.readTree(content);
     IOUtils.closeQuietly(content);
 
-    srcNode.set(JSON_EDITLINK_NAME, new TextNode(href));
+    srcNode.set(Constants.get(version, ConstantKey.JSON_EDITLINK_NAME), new TextNode(href));
     return IOUtils.toInputStream(srcNode.toString());
   }
 

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/c73772f0/fit/src/main/java/org/apache/olingo/fit/utils/AbstractUtilities.java
----------------------------------------------------------------------
diff --git a/fit/src/main/java/org/apache/olingo/fit/utils/AbstractUtilities.java b/fit/src/main/java/org/apache/olingo/fit/utils/AbstractUtilities.java
index 7b74b62..5b23366 100644
--- a/fit/src/main/java/org/apache/olingo/fit/utils/AbstractUtilities.java
+++ b/fit/src/main/java/org/apache/olingo/fit/utils/AbstractUtilities.java
@@ -19,7 +19,6 @@
 package org.apache.olingo.fit.utils;
 
 import static org.apache.olingo.fit.utils.Commons.sequence;
-import static org.apache.olingo.fit.utils.Constants.*;
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.File;
@@ -134,7 +133,8 @@ public abstract class AbstractUtilities {
     // 0. Get the path
     // -----------------------------------------
     final String path =
-            entitySetName + File.separatorChar + Commons.getEntityKey(key) + File.separatorChar + ENTITY;
+            entitySetName + File.separatorChar + Commons.getEntityKey(key) + File.separatorChar
+            + Constants.get(version, ConstantKey.ENTITY);
     // -----------------------------------------
 
     // -----------------------------------------
@@ -229,7 +229,7 @@ public abstract class AbstractUtilities {
     // -----------------------------------------
     final FileObject fo = fsManager.putInMemory(
             normalizedEntity,
-            fsManager.getAbsolutePath(path + ENTITY, getDefaultFormat()));
+            fsManager.getAbsolutePath(path + Constants.get(version, ConstantKey.ENTITY), getDefaultFormat()));
     // -----------------------------------------
 
     // -----------------------------------------
@@ -282,7 +282,8 @@ public abstract class AbstractUtilities {
     // -----------------------------------------
     // 1. save the media entity value
     // -----------------------------------------
-    fsManager.putInMemory(is, fsManager.getAbsolutePath(path + MEDIA_CONTENT_FILENAME, null));
+    fsManager.putInMemory(is, fsManager.getAbsolutePath(path
+            + Constants.get(version, ConstantKey.MEDIA_CONTENT_FILENAME), null));
     IOUtils.closeQuietly(is);
     // -----------------------------------------
 
@@ -291,13 +292,13 @@ public abstract class AbstractUtilities {
     // -----------------------------------------
     final String entityURI = Commons.getEntityURI(entitySetName, entityKey);
     String entity = "<?xml version=\"1.0\" encoding=\"utf-8\"?>"
-            + "<entry xml:base=\"" + DEFAULT_SERVICE_URL + "\" "
+            + "<entry xml:base=\"" + Constants.get(version, ConstantKey.DEFAULT_SERVICE_URL) + "\" "
             + "xmlns=\"http://www.w3.org/2005/Atom\" "
             + "xmlns:d=\"http://schemas.microsoft.com/ado/2007/08/dataservices\" "
             + "xmlns:m=\"http://schemas.microsoft.com/ado/2007/08/dataservices/metadata\" "
             + "xmlns:georss=\"http://www.georss.org/georss\" "
             + "xmlns:gml=\"http://www.opengis.net/gml\">"
-            + "<id>" + DEFAULT_SERVICE_URL + entityURI + "</id>"
+            + "<id>" + Constants.get(version, ConstantKey.DEFAULT_SERVICE_URL) + entityURI + "</id>"
             + "<category term=\"Microsoft.Test.OData.Services.AstoriaDefaultService." + entitySetName + "\" "
             + "scheme=\"http://schemas.microsoft.com/ado/2007/08/dataservices/scheme\" />"
             + "<link rel=\"edit\" title=\"Car\" href=\"" + entityURI + "\" />"
@@ -310,16 +311,18 @@ public abstract class AbstractUtilities {
             + "</entry>";
 
     fsManager.putInMemory(
-            IOUtils.toInputStream(entity), fsManager.getAbsolutePath(path + ENTITY, Accept.ATOM));
+            IOUtils.toInputStream(entity),
+            fsManager.getAbsolutePath(path + Constants.get(version, ConstantKey.ENTITY), Accept.ATOM));
     // -----------------------------------------
 
     // -----------------------------------------
     // 3. save entity as json
     // -----------------------------------------
     entity = "{"
-            + "\"odata.metadata\": \"" + DEFAULT_SERVICE_URL + "/$metadata#" + entitySetName + "/@Element\","
+            + "\"odata.metadata\": \"" + Constants.get(version, ConstantKey.DEFAULT_SERVICE_URL)
+            + "/$metadata#" + entitySetName + "/@Element\","
             + "\"odata.type\": \"Microsoft.Test.OData.Services.AstoriaDefaultService." + entitySetName + "\","
-            + "\"odata.id\": \"" + DEFAULT_SERVICE_URL + entityURI + "\","
+            + "\"odata.id\": \"" + Constants.get(version, ConstantKey.DEFAULT_SERVICE_URL) + entityURI + "\","
             + "\"odata.editLink\": \"" + entityURI + "\","
             + "\"odata.mediaEditLink\": \"" + entityURI + "/$value\","
             + "\"odata.mediaReadLink\": \"" + entityURI + "/$value\","
@@ -328,7 +331,8 @@ public abstract class AbstractUtilities {
             + "\"Description\": null" + "}";
 
     fsManager.putInMemory(
-            IOUtils.toInputStream(entity), fsManager.getAbsolutePath(path + ENTITY, Accept.JSON_FULLMETA));
+            IOUtils.toInputStream(entity), fsManager.getAbsolutePath(path + Constants.get(version, ConstantKey.ENTITY),
+            Accept.JSON_FULLMETA));
     // -----------------------------------------
 
     return readEntity(entitySetName, entityKey, getDefaultFormat()).getValue();
@@ -376,7 +380,7 @@ public abstract class AbstractUtilities {
           final InputStream entity, final String etag, final Accept accept, final Response.Status status) {
     final Response.ResponseBuilder builder = Response.ok();
     if (version == ODataVersion.v3) {
-      builder.header(ODATA_SERVICE_VERSION, version.getVersion() + ";");
+      builder.header(Constants.get(version, ConstantKey.ODATA_SERVICE_VERSION), version.getVersion() + ";");
     }
 
     if (StringUtils.isNotBlank(etag)) {
@@ -426,7 +430,7 @@ public abstract class AbstractUtilities {
 
     final Response.ResponseBuilder builder = Response.serverError();
     if (version == ODataVersion.v3) {
-      builder.header(ODATA_SERVICE_VERSION, version.getVersion() + ";");
+      builder.header(Constants.get(version, ConstantKey.ODATA_SERVICE_VERSION), version + ";");
     }
 
     final String ext;
@@ -612,7 +616,7 @@ public abstract class AbstractUtilities {
 
     final String basePath =
             entitySetName + File.separatorChar + Commons.getEntityKey(entityId) + File.separatorChar
-            + LINKS_FILE_PATH + File.separatorChar;
+            + Constants.get(version, ConstantKey.LINKS_FILE_PATH) + File.separatorChar;
 
     final LinkInfo linkInfo = new LinkInfo(fsManager.readFile(basePath + linkName, accept));
     linkInfo.setEtag(Commons.getETag(basePath, version));
@@ -631,7 +635,8 @@ public abstract class AbstractUtilities {
           final String entitySetName, final String entityId, final String name, final InputStream value)
           throws IOException {
     final FileObject fo = fsManager.putInMemory(value, fsManager.getAbsolutePath(
-            Commons.getEntityBasePath(entitySetName, entityId) + (name == null ? MEDIA_CONTENT_FILENAME : name), null));
+            Commons.getEntityBasePath(entitySetName, entityId)
+            + (name == null ? Constants.get(version, ConstantKey.MEDIA_CONTENT_FILENAME) : name), null));
 
     return fo.getContent().getInputStream();
   }
@@ -644,7 +649,7 @@ public abstract class AbstractUtilities {
           final String entitySetName, final String entityId, final String name) {
     final String basePath = Commons.getEntityBasePath(entitySetName, entityId);
     return new SimpleEntry<String, InputStream>(basePath, fsManager.readFile(basePath
-            + (name == null ? MEDIA_CONTENT_FILENAME : name)));
+            + (name == null ? Constants.get(version, ConstantKey.MEDIA_CONTENT_FILENAME) : name)));
   }
 
   public Map.Entry<String, InputStream> readEntity(
@@ -654,7 +659,8 @@ public abstract class AbstractUtilities {
     }
 
     final String basePath = Commons.getEntityBasePath(entitySetName, entityId);
-    return new SimpleEntry<String, InputStream>(basePath, fsManager.readFile(basePath + ENTITY, accept));
+    return new SimpleEntry<String, InputStream>(basePath,
+            fsManager.readFile(basePath + Constants.get(version, ConstantKey.ENTITY), accept));
   }
 
   public InputStream expandEntity(
@@ -719,15 +725,16 @@ public abstract class AbstractUtilities {
             ? Accept.XML : accept.getExtension().equals(Accept.JSON.getExtension()) ? Accept.JSON_FULLMETA : accept;
 
     // read atom
-    InputStream stream = fsManager.readFile(basePath + ENTITY, acceptType);
+    InputStream stream = fsManager.readFile(basePath + Constants.get(version, ConstantKey.ENTITY), acceptType);
 
     // change atom
     stream = replaceProperty(stream, changes, path, justValue);
 
     // save atom
-    fsManager.putInMemory(stream, fsManager.getAbsolutePath(basePath + ENTITY, acceptType));
+    fsManager.putInMemory(stream,
+            fsManager.getAbsolutePath(basePath + Constants.get(version, ConstantKey.ENTITY), acceptType));
 
-    return fsManager.readFile(basePath + ENTITY, acceptType);
+    return fsManager.readFile(basePath + Constants.get(version, ConstantKey.ENTITY), acceptType);
   }
 
   public InputStream deleteProperty(
@@ -741,15 +748,16 @@ public abstract class AbstractUtilities {
             ? Accept.XML : accept.getExtension().equals(Accept.JSON.getExtension()) ? Accept.JSON_FULLMETA : accept;
 
     // read atom
-    InputStream stream = fsManager.readFile(basePath + ENTITY, acceptType);
+    InputStream stream = fsManager.readFile(basePath + Constants.get(version, ConstantKey.ENTITY), acceptType);
 
     // change atom
     stream = deleteProperty(stream, path);
 
     // save atom
-    fsManager.putInMemory(stream, fsManager.getAbsolutePath(basePath + ENTITY, acceptType));
+    fsManager.putInMemory(stream,
+            fsManager.getAbsolutePath(basePath + Constants.get(version, ConstantKey.ENTITY), acceptType));
 
-    return fsManager.readFile(basePath + ENTITY, acceptType);
+    return fsManager.readFile(basePath + Constants.get(version, ConstantKey.ENTITY), acceptType);
   }
 
   public abstract InputStream readEntities(

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/c73772f0/fit/src/main/java/org/apache/olingo/fit/utils/AbstractXMLUtilities.java
----------------------------------------------------------------------
diff --git a/fit/src/main/java/org/apache/olingo/fit/utils/AbstractXMLUtilities.java b/fit/src/main/java/org/apache/olingo/fit/utils/AbstractXMLUtilities.java
index cef564a..e811388 100644
--- a/fit/src/main/java/org/apache/olingo/fit/utils/AbstractXMLUtilities.java
+++ b/fit/src/main/java/org/apache/olingo/fit/utils/AbstractXMLUtilities.java
@@ -18,8 +18,6 @@
  */
 package org.apache.olingo.fit.utils;
 
-import static org.apache.olingo.fit.utils.Constants.*;
-
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.File;
@@ -154,13 +152,16 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
       attributes.add(eventFactory.createAttribute(new QName("title"), link));
       attributes.add(eventFactory.createAttribute(new QName("href"),
               Commons.getLinksURI(version, entitySetName, entitykey, link)));
-      attributes.add(eventFactory.createAttribute(new QName("rel"), Constants.ATOM_LINK_REL + link));
+      attributes.add(eventFactory.createAttribute(new QName("rel"),
+              Constants.get(version, ConstantKey.ATOM_LINK_REL) + link));
       attributes.add(eventFactory.createAttribute(new QName("type"),
-              Commons.linkInfo.get(version).isFeed(entitySetName, link) ? Constants.ATOM_LINK_FEED
-              : Constants.ATOM_LINK_ENTRY));
+              Commons.linkInfo.get(version).isFeed(entitySetName, link)
+              ? Constants.get(version, ConstantKey.ATOM_LINK_FEED)
+              : Constants.get(version, ConstantKey.ATOM_LINK_ENTRY)));
 
-      writer.add(eventFactory.createStartElement(new QName(LINK), attributes.iterator(), null));
-      writer.add(eventFactory.createEndElement(new QName(LINK), null));
+      writer.add(eventFactory.createStartElement(
+              new QName(Constants.get(version, ConstantKey.LINK)), attributes.iterator(), null));
+      writer.add(eventFactory.createEndElement(new QName(Constants.get(version, ConstantKey.LINK)), null));
     }
 
     writer.add(entry.getValue().getContentReader());
@@ -190,7 +191,8 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
 
       while (true) {
         final Map.Entry<Integer, XmlElement> linkInfo =
-                extractElement(reader, null, Collections.<String>singletonList(LINK), startDepth, 2, 2);
+                extractElement(reader, null,
+                Collections.<String>singletonList(Constants.get(version, ConstantKey.LINK)), startDepth, 2, 2);
 
         startDepth = linkInfo.getKey();
 
@@ -228,7 +230,8 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
       while (true) {
         // a. search for link with type attribute equals to "application/atom+xml;type=entry/feed"
         final Map.Entry<Integer, XmlElement> linkInfo = extractElement(
-                reader, null, Collections.<String>singletonList(LINK), filter, true, startDepth, 2, 2);
+                reader, null, Collections.<String>singletonList(Constants.get(version, ConstantKey.LINK)),
+                filter, true, startDepth, 2, 2);
         final XmlElement link = linkInfo.getValue();
         startDepth = linkInfo.getKey();
 
@@ -239,7 +242,8 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
 
         try {
           final XmlElement inlineElement =
-                  extractElement(link.getContentReader(), null, Collections.<String>singletonList(INLINE), 0, -1, -1).
+                  extractElement(link.getContentReader(), null,
+                  Collections.<String>singletonList(Constants.get(version, ConstantKey.INLINE)), 0, -1, -1).
                   getValue();
           final XMLEventReader inlineReader = inlineElement.getContentReader();
 
@@ -307,7 +311,8 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
       while (true) {
         // a. search for link with type attribute equals to "application/atom+xml;type=entry/feed"
         linkInfo = extractElement(
-                reader, writer, Collections.<String>singletonList(LINK), filter, true,
+                reader, writer,
+                Collections.<String>singletonList(Constants.get(version, ConstantKey.LINK)), filter, true,
                 linkInfo == null ? 0 : linkInfo.getKey(), 2, 2);
         final XmlElement link = linkInfo.getValue();
 
@@ -342,7 +347,7 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
     final InputStream content = addEditLink(
             new ByteArrayInputStream(tmpBos.toByteArray()),
             entitySetName,
-            Constants.DEFAULT_SERVICE_URL + entitySetName + "(" + entityKey + ")");
+            Constants.get(version, ConstantKey.DEFAULT_SERVICE_URL) + entitySetName + "(" + entityKey + ")");
     // -----------------------------------------
 
     // -----------------------------------------
@@ -351,7 +356,7 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
     return addAtomContent(
             content,
             entitySetName,
-            Constants.DEFAULT_SERVICE_URL + entitySetName + "(" + entityKey + ")");
+            Constants.get(version, ConstantKey.DEFAULT_SERVICE_URL) + entitySetName + "(" + entityKey + ")");
     // -----------------------------------------
 
   }
@@ -439,7 +444,7 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
 
     try {
       // check edit link existence
-      extractElement(reader, writer, Collections.<String>singletonList(LINK),
+      extractElement(reader, writer, Collections.<String>singletonList(Constants.get(version, ConstantKey.LINK)),
               Collections.<Map.Entry<String, String>>singletonList(
               new AbstractMap.SimpleEntry<String, String>("rel", "edit")), false, 0, -1, -1);
 
@@ -518,7 +523,8 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
       } else {
         try {
           final XmlElement entryElement =
-                  extractElement(reader, writer, Collections.<String>singletonList(PROPERTIES), 0, 2, 3).getValue();
+                  extractElement(reader, writer, Collections.<String>singletonList(
+                  Constants.get(version, ConstantKey.PROPERTIES)), 0, 2, 3).getValue();
 
           addAtomElement(
                   IOUtils.toInputStream("<content type=\"application/xml\">"),
@@ -564,9 +570,11 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
 
   public int countAllElements(final String entitySetName) throws Exception {
     final String basePath = entitySetName + File.separatorChar;
-    int count = countFeedElements(fsManager.readFile(basePath + FEED, Accept.XML), "entry");
+    int count = countFeedElements(fsManager.readFile(basePath + Constants.get(version, ConstantKey.FEED), Accept.XML),
+            "entry");
 
-    final String skipTokenDirPath = fsManager.getAbsolutePath(basePath + SKIP_TOKEN, null);
+    final String skipTokenDirPath = fsManager.getAbsolutePath(basePath + Constants.get(version, ConstantKey.SKIP_TOKEN),
+            null);
 
 
     try {
@@ -575,7 +583,8 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
 
       for (FileObject file : files) {
         count += countFeedElements(fsManager.readFile(
-                basePath + SKIP_TOKEN + File.separatorChar + file.getName().getBaseName(), null), "entry");
+                basePath + Constants.get(version, ConstantKey.SKIP_TOKEN) + File.separatorChar
+                + file.getName().getBaseName(), null), "entry");
       }
     } catch (FileSystemException fse) {
       LOG.debug("Resource path '{}' not found", skipTokenDirPath);
@@ -739,7 +748,7 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
     final List<String> pathElements = new ArrayList<String>();
 
     for (String element : path) {
-      pathElements.add(ATOM_PROPERTY_PREFIX + element);
+      pathElements.add(Constants.get(version, ConstantKey.ATOM_PROPERTY_PREFIX) + element);
     }
 
     final XMLEventReader reader = getEventReader(is);
@@ -770,28 +779,30 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
     while (reader.hasNext()) {
       final XMLEvent event = reader.nextEvent();
       if (event.getEventType() == XMLStreamConstants.START_ELEMENT
-              && LINK.equals(event.asStartElement().getName().getLocalPart())
+              && Constants.get(version, ConstantKey.LINK).equals(event.asStartElement().getName().getLocalPart())
               && !fieldToBeSaved.contains(
               event.asStartElement().getAttributeByName(new QName("title")).getValue())
               && !"edit".equals(event.asStartElement().getAttributeByName(new QName("rel")).getValue())) {
         writeCurrent = false;
       } else if (event.getEventType() == XMLStreamConstants.END_ELEMENT
-              && LINK.equals(event.asEndElement().getName().getLocalPart())) {
+              && Constants.get(version, ConstantKey.LINK).equals(event.asEndElement().getName().getLocalPart())) {
         writeNext = true;
       } else if (event.getEventType() == XMLStreamConstants.START_ELEMENT
-              && (PROPERTIES).equals(event.asStartElement().getName().getLocalPart())) {
+              && (Constants.get(version, ConstantKey.PROPERTIES)).equals(
+              event.asStartElement().getName().getLocalPart())) {
         writeCurrent = true;
         writeNext = false;
         inProperties = true;
       } else if (event.getEventType() == XMLStreamConstants.END_ELEMENT
-              && (PROPERTIES).equals(event.asEndElement().getName().getLocalPart())) {
+              && (Constants.get(version, ConstantKey.PROPERTIES)).equals(
+              event.asEndElement().getName().getLocalPart())) {
         writeCurrent = true;
       } else if (inProperties) {
         if (event.getEventType() == XMLStreamConstants.START_ELEMENT) {
           final String elementName = event.asStartElement().getName().getLocalPart();
 
           for (String propertyName : propertyNames) {
-            if ((ATOM_PROPERTY_PREFIX + propertyName.trim()).equals(elementName)) {
+            if ((Constants.get(version, ConstantKey.ATOM_PROPERTY_PREFIX) + propertyName.trim()).equals(elementName)) {
               writeCurrent = true;
               found.remove(propertyName);
               currentName = propertyName;
@@ -800,7 +811,7 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
 
         } else if (event.getEventType() == XMLStreamConstants.END_ELEMENT
                 && StringUtils.isNotBlank(currentName)
-                && (ATOM_PROPERTY_PREFIX + currentName.trim()).equals(
+                && (Constants.get(version, ConstantKey.ATOM_PROPERTY_PREFIX) + currentName.trim()).equals(
                 event.asEndElement().getName().getLocalPart())) {
           writeNext = false;
           currentName = null;
@@ -846,13 +857,14 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
       // build a feed
       bos.write("<?xml version=\"1.0\" encoding=\"utf-8\"?>".getBytes());
 
-      bos.write(("<feed xml:base=\"" + DEFAULT_SERVICE_URL + "\" "
+      bos.write(("<feed xml:base=\"" + Constants.get(version, ConstantKey.DEFAULT_SERVICE_URL) + "\" "
               + "xmlns=\"http://www.w3.org/2005/Atom\" "
               + "xmlns:d=\"http://schemas.microsoft.com/ado/2007/08/dataservices\" "
               + "xmlns:m=\"http://schemas.microsoft.com/ado/2007/08/dataservices/metadata\">")
               .getBytes());
 
-      bos.write(("<id>" + DEFAULT_SERVICE_URL + "entityset(entityid)/" + linkName + "</id>").getBytes());
+      bos.write(("<id>" + Constants.get(version, ConstantKey.DEFAULT_SERVICE_URL) + "entityset(entityid)/" + linkName
+              + "</id>").getBytes());
 
       bos.write(("<title type=\"text\">" + linkName + "</title>").getBytes());
       bos.write("<updated>2014-03-03T13:40:49Z</updated>".getBytes());
@@ -901,7 +913,8 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
     XMLEventReader reader = getEventReader(new ByteArrayInputStream(bos.toByteArray()));
 
     final Map.Entry<Integer, XmlElement> propertyElement =
-            extractElement(reader, null, Collections.<String>singletonList(PROPERTIES), 0, 2, 3);
+            extractElement(reader, null,
+            Collections.<String>singletonList(Constants.get(version, ConstantKey.PROPERTIES)), 0, 2, 3);
     reader.close();
 
     reader = propertyElement.getValue().getContentReader();
@@ -924,9 +937,11 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
       int pos = 0;
       while (true) {
         final Map.Entry<Integer, XmlElement> linkElement =
-                extractElement(reader, null, Collections.<String>singletonList(LINK), pos, 2, 2);
+                extractElement(reader, null,
+                Collections.<String>singletonList(Constants.get(version, ConstantKey.LINK)), pos, 2, 2);
 
-        res.put("[LINK]" + linkElement.getValue().getStart().getAttributeByName(new QName("title")).getValue(),
+        res.put("[Constants.get(version, ConstantKey.LINK)]"
+                + linkElement.getValue().getStart().getAttributeByName(new QName("title")).getValue(),
                 linkElement.getValue().toStream());
 
         pos = linkElement.getKey();
@@ -952,7 +967,8 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
     // add property changes
     // ---------------------------------
     Map.Entry<Integer, XmlElement> propertyElement =
-            extractElement(reader, writer, Collections.<String>singletonList(PROPERTIES), 0, 2, 3);
+            extractElement(reader, writer,
+            Collections.<String>singletonList(Constants.get(version, ConstantKey.PROPERTIES)), 0, 2, 3);
 
     writer.flush();
 
@@ -981,7 +997,7 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
     }
 
     for (Map.Entry<String, InputStream> remains : properties.entrySet()) {
-      if (!remains.getKey().startsWith("[LINK]")) {
+      if (!remains.getKey().startsWith("[Constants.get(version, ConstantKey.LINK)]")) {
         pwriter.append(IOUtils.toString(remains.getValue()));
         IOUtils.closeQuietly(remains.getValue());
       }
@@ -1009,7 +1025,7 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
     // remove existent links
     for (Map.Entry<String, InputStream> remains : properties.entrySet()) {
 
-      if (remains.getKey().startsWith("[LINK]")) {
+      if (remains.getKey().startsWith("[Constants.get(version, ConstantKey.LINK)]")) {
         reader = getEventReader(new ByteArrayInputStream(bos.toByteArray()));
 
         bos.reset();
@@ -1018,7 +1034,7 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
         try {
           final String linkName = remains.getKey().substring(remains.getKey().indexOf("]") + 1);
 
-          extractElement(reader, writer, Collections.<String>singletonList(LINK),
+          extractElement(reader, writer, Collections.<String>singletonList(Constants.get(version, ConstantKey.LINK)),
                   Collections.<Map.Entry<String, String>>singleton(new SimpleEntry<String, String>("title", linkName)),
                   false, 0, 2, 2);
 
@@ -1038,14 +1054,15 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
     bos.reset();
     writer = getEventWriter(bos);
 
-    propertyElement = extractElement(reader, writer, Collections.<String>singletonList(CONTENT), 0, 2, 2);
+    propertyElement = extractElement(reader, writer,
+            Collections.<String>singletonList(Constants.get(version, ConstantKey.CONTENT)), 0, 2, 2);
     writer.flush();
 
     pbos.reset();
     pwriter = new OutputStreamWriter(pbos);
 
     for (Map.Entry<String, InputStream> remains : properties.entrySet()) {
-      if (remains.getKey().startsWith("[LINK]")) {
+      if (remains.getKey().startsWith("[Constants.get(version, ConstantKey.LINK)]")) {
         pwriter.append(IOUtils.toString(remains.getValue()));
         IOUtils.closeQuietly(remains.getValue());
       }
@@ -1084,7 +1101,8 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
 
     try {
       final XmlElement linkElement =
-              extractElement(reader, writer, Collections.<String>singletonList(LINK),
+              extractElement(reader, writer,
+              Collections.<String>singletonList(Constants.get(version, ConstantKey.LINK)),
               Collections.<Map.Entry<String, String>>singletonList(new SimpleEntry<String, String>("title", linkName)),
               false, 0, -1, -1).getValue();
       writer.add(linkElement.getStart());
@@ -1116,23 +1134,26 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
 
   public String getEdmTypeFromAtom(final String entitySetName, final String entityId, final List<String> path)
           throws Exception {
-    InputStream src = fsManager.readFile(Commons.getEntityBasePath(entitySetName, entityId) + ENTITY, Accept.XML);
+    InputStream src = fsManager.readFile(Commons.getEntityBasePath(entitySetName, entityId)
+            + Constants.get(version, ConstantKey.ENTITY), Accept.XML);
 
     final List<String> atomPathElements = new ArrayList<String>();
 
     for (String element : path) {
-      atomPathElements.add(ATOM_PROPERTY_PREFIX + element);
+      atomPathElements.add(Constants.get(version, ConstantKey.ATOM_PROPERTY_PREFIX) + element);
     }
 
     final Map.Entry<Integer, XmlElement> prop = extractElement(getEventReader(src), null, atomPathElements, 0, 3, 4);
     IOUtils.closeQuietly(src);
 
-    final Attribute type = prop.getValue().getStart().getAttributeByName(new QName(TYPE));
+
+    final Attribute type =
+            prop.getValue().getStart().getAttributeByName(new QName(Constants.get(version, ConstantKey.TYPE)));
 
     final String edmType;
 
     if (type == null) {
-      edmType = Constants.ATOM_DEF_TYPE;
+      edmType = Constants.get(version, ConstantKey.ATOM_DEF_TYPE);
     } else {
       edmType = type.getValue();
     }
@@ -1189,11 +1210,12 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
     final List<String> pathElements = new ArrayList<String>();
 
     for (String element : path) {
-      pathElements.add(ATOM_PROPERTY_PREFIX + element);
+      pathElements.add(Constants.get(version, ConstantKey.ATOM_PROPERTY_PREFIX) + element);
     }
 
     final InputStream src =
-            fsManager.readFile(Commons.getEntityBasePath(entitySetName, entityId) + ENTITY, Accept.XML);
+            fsManager.readFile(Commons.getEntityBasePath(entitySetName, entityId)
+            + Constants.get(version, ConstantKey.ENTITY), Accept.XML);
 
     final XMLEventReader reader = getEventReader(src);
     final XmlElement property = extractElement(reader, null, pathElements, 0, 3, 4).getValue();
@@ -1208,21 +1230,17 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
     writer.add(eventFactory.createStartDocument("UTF-8", "1.0"));
     writer.add(property.getStart());
 
-    if (version == ODataVersion.v4) {
-
-      if (property.getStart().getAttributeByName(new QName(ATOM_DATASERVICE_NS)) == null) {
-        writer.add(eventFactory.createNamespace(ATOM_PROPERTY_PREFIX.substring(0, 1), V4_DATASERVICES_NS));
-      }
-      if (property.getStart().getAttributeByName(new QName(ATOM_METADATA_NS)) == null) {
-        writer.add(eventFactory.createNamespace(ATOM_METADATA_PREFIX.substring(0, 1), V4_METADATA_NS));
-      }
-    } else {
-      if (property.getStart().getAttributeByName(new QName(ATOM_DATASERVICE_NS)) == null) {
-        writer.add(eventFactory.createNamespace(ATOM_PROPERTY_PREFIX.substring(0, 1), V3_DATASERVICES_NS));
-      }
-      if (property.getStart().getAttributeByName(new QName(ATOM_METADATA_NS)) == null) {
-        writer.add(eventFactory.createNamespace(ATOM_METADATA_PREFIX.substring(0, 1), V3_METADATA_NS));
-      }
+    if (property.getStart().getAttributeByName(new QName(
+            Constants.get(version, ConstantKey.ATOM_DATASERVICE_NS))) == null) {
+      writer.add(eventFactory.createNamespace(
+              Constants.get(version, ConstantKey.ATOM_PROPERTY_PREFIX).substring(0, 1),
+              Constants.get(version, ConstantKey.DATASERVICES_NS)));
+    }
+    if (property.getStart().getAttributeByName(new QName(
+            Constants.get(version, ConstantKey.ATOM_METADATA_NS))) == null) {
+      writer.add(eventFactory.createNamespace(
+              Constants.get(version, ConstantKey.ATOM_METADATA_PREFIX).substring(0, 1),
+              Constants.get(version, ConstantKey.METADATA_NS)));
     }
 
     writer.add(property.getContentReader());
@@ -1242,7 +1260,7 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
     final List<String> pathElements = new ArrayList<String>();
 
     for (String element : path) {
-      pathElements.add(ATOM_PROPERTY_PREFIX + element);
+      pathElements.add(Constants.get(version, ConstantKey.ATOM_PROPERTY_PREFIX) + element);
     }
 
     final XMLEventReader reader = getEventReader(src);
@@ -1258,7 +1276,16 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
 
     final XMLEventReader changesReader = new XMLEventReaderWrapper(replacement);
 
-    writer.add(changesReader);
+    while (changesReader.hasNext()) {
+      final XMLEvent event = changesReader.nextEvent();
+      if (event.isStartElement() && event.asStartElement().getName().equals(element.getValue().getStart().getName())) {
+        writer.add(element.getValue().getStart());
+        writer.add(changesReader);
+      } else {
+        writer.add(event);
+      }
+    }
+
     changesReader.close();
     IOUtils.closeQuietly(replacement);
 
@@ -1283,7 +1310,7 @@ public abstract class AbstractXMLUtilities extends AbstractUtilities {
     final List<String> pathElements = new ArrayList<String>();
 
     for (String element : path) {
-      pathElements.add(ATOM_PROPERTY_PREFIX + element);
+      pathElements.add(Constants.get(version, ConstantKey.ATOM_PROPERTY_PREFIX) + element);
     }
 
     final XMLEventReader reader = getEventReader(src);

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/c73772f0/fit/src/main/java/org/apache/olingo/fit/utils/Commons.java
----------------------------------------------------------------------
diff --git a/fit/src/main/java/org/apache/olingo/fit/utils/Commons.java b/fit/src/main/java/org/apache/olingo/fit/utils/Commons.java
index 4cf992a..c0031f1 100644
--- a/fit/src/main/java/org/apache/olingo/fit/utils/Commons.java
+++ b/fit/src/main/java/org/apache/olingo/fit/utils/Commons.java
@@ -18,8 +18,6 @@
  */
 package org.apache.olingo.fit.utils;
 
-import static org.apache.olingo.fit.utils.Constants.*;
-
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.node.ArrayNode;
@@ -113,7 +111,8 @@ public abstract class Commons {
           throws IOException {
     try {
       return FSManager.instance(version)
-              .getAbsolutePath(basePath + LINKS_FILE_PATH + File.separatorChar + linkName, accept);
+              .getAbsolutePath(basePath + Constants.get(version, ConstantKey.LINKS_FILE_PATH)
+              + File.separatorChar + linkName, accept);
     } catch (Exception e) {
       throw new IOException(e);
     }
@@ -147,7 +146,7 @@ public abstract class Commons {
       if (URI.create(uri).isAbsolute()) {
         builder.append(uri);
       } else {
-        builder.append(DEFAULT_SERVICE_URL).append(uri);
+        builder.append(Constants.get(ConstantKey.DEFAULT_SERVICE_URL)).append(uri);
       }
       builder.append("</uri>");
     }
@@ -162,8 +161,8 @@ public abstract class Commons {
           throws IOException {
     final ObjectNode links = new ObjectNode(JsonNodeFactory.instance);
     links.put(
-            JSON_ODATAMETADATA_NAME,
-            ODATA_METADATA_PREFIX + entitySetName + "/$links/" + link.getKey());
+            Constants.get(ConstantKey.JSON_ODATAMETADATA_NAME),
+            Constants.get(ConstantKey.ODATA_METADATA_PREFIX) + entitySetName + "/$links/" + link.getKey());
 
     final ArrayNode uris = new ArrayNode(JsonNodeFactory.instance);
 
@@ -172,7 +171,7 @@ public abstract class Commons {
       if (URI.create(uri).isAbsolute()) {
         absoluteURI = uri;
       } else {
-        absoluteURI = DEFAULT_SERVICE_URL + uri;
+        absoluteURI = Constants.get(ConstantKey.DEFAULT_SERVICE_URL) + uri;
       }
       uris.add(new ObjectNode(JsonNodeFactory.instance).put("url", absoluteURI));
     }
@@ -214,20 +213,20 @@ public abstract class Commons {
     switch (target) {
       case JSON_NOMETA:
         // nometa + minimal
-        toBeRemoved.add(JSON_ODATAMETADATA_NAME);
+        toBeRemoved.add(Constants.get(ConstantKey.JSON_ODATAMETADATA_NAME));
 
       case JSON:
         // minimal
-        toBeRemoved.add(JSON_EDITLINK_NAME);
-        toBeRemoved.add(JSON_ID_NAME);
-        toBeRemoved.add(JSON_TYPE_NAME);
+        toBeRemoved.add(Constants.get(ConstantKey.JSON_EDITLINK_NAME));
+        toBeRemoved.add(Constants.get(ConstantKey.JSON_ID_NAME));
+        toBeRemoved.add(Constants.get(ConstantKey.JSON_TYPE_NAME));
 
         final Iterator<Map.Entry<String, JsonNode>> fields = node.fields();
         while (fields.hasNext()) {
           final Map.Entry<String, JsonNode> field = fields.next();
-          if (field.getKey().endsWith(JSON_MEDIA_SUFFIX)
-                  || field.getKey().endsWith(JSON_NAVIGATION_SUFFIX)
-                  || field.getKey().endsWith(JSON_TYPE_SUFFIX)) {
+          if (field.getKey().endsWith(Constants.get(ConstantKey.JSON_MEDIA_SUFFIX))
+                  || field.getKey().endsWith(Constants.get(ConstantKey.JSON_NAVIGATION_SUFFIX))
+                  || field.getKey().endsWith(Constants.get(ConstantKey.JSON_TYPE_SUFFIX))) {
             toBeRemoved.add(field.getKey());
           } else if (field.getValue().isObject()) {
             toBeReplaced.put(field.getKey(), changeFormat((ObjectNode) field.getValue(), target));

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/c73772f0/fit/src/main/java/org/apache/olingo/fit/utils/ConstantKey.java
----------------------------------------------------------------------
diff --git a/fit/src/main/java/org/apache/olingo/fit/utils/ConstantKey.java b/fit/src/main/java/org/apache/olingo/fit/utils/ConstantKey.java
new file mode 100644
index 0000000..3c46e94
--- /dev/null
+++ b/fit/src/main/java/org/apache/olingo/fit/utils/ConstantKey.java
@@ -0,0 +1,67 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.olingo.fit.utils;
+
+public enum ConstantKey {
+
+  ODATA_SERVICE_VERSION,
+  DEFAULT_SERVICE_URL,
+  ODATA_COUNT_NAME,
+  ODATA_METADATA_PREFIX,
+  ATOM_DEF_TYPE,
+  ATOM_PROPERTY_PREFIX,
+  ATOM_METADATA_PREFIX,
+  ATOM_METADATA_NS,
+  ATOM_DATASERVICE_NS,
+  ATOM_LINK_ENTRY,
+  ATOM_LINK_FEED,
+  ATOM_LINK_REL,
+  TYPE,
+  INLINE_LOCAL,
+  INLINE_FILE_PATH,
+  LINKS_FILE_PATH,
+  INLINE,
+  CONTENT,
+  PROPERTIES,
+  LINK,
+  DATASERVICES_NS,
+  METADATA_NS,
+  METADATA,
+  SERVICES,
+  FEED,
+  ENTITY,
+  REF,
+  MEDIA_CONTENT_FILENAME,
+  SKIP_TOKEN,
+  FILTER,
+  ORDERBY,
+  JSON_VALUE_NAME,
+  JSON_NEXTLINK_NAME,
+  JSON_NEXTLINK_SUFFIX,
+  JSON_ODATAMETADATA_NAME,
+  JSON_NAVIGATION_BIND_SUFFIX,
+  JSON_NAVIGATION_SUFFIX,
+  JSON_MEDIA_SUFFIX,
+  JSON_TYPE_NAME,
+  JSON_TYPE_SUFFIX,
+  JSON_ID_NAME,
+  JSON_EDITLINK_NAME,
+  XHTTP_HEADER_NAME;
+
+};

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/c73772f0/fit/src/main/java/org/apache/olingo/fit/utils/Constants.java
----------------------------------------------------------------------
diff --git a/fit/src/main/java/org/apache/olingo/fit/utils/Constants.java b/fit/src/main/java/org/apache/olingo/fit/utils/Constants.java
index be522d9..ffd52bc 100644
--- a/fit/src/main/java/org/apache/olingo/fit/utils/Constants.java
+++ b/fit/src/main/java/org/apache/olingo/fit/utils/Constants.java
@@ -18,96 +18,83 @@
  */
 package org.apache.olingo.fit.utils;
 
-public class Constants {
-
-  public final static String ODATA_SERVICE_VERSION = "DataServiceVersion";
-
-  public final static String DEFAULT_SERVICE_URL = "http://localhost:9080/StaticService/V30/Static.svc/";
-
-  public final static String ODATA_COUNT_NAME = "odata.count";
-
-  public final static String ODATA_METADATA_PREFIX = DEFAULT_SERVICE_URL + "$metadata#";
-
-  public final static String ATOM_DEF_TYPE = "Edm.String";
-
-  public final static String ATOM_PROPERTY_PREFIX = "d:";
-
-  public final static String ATOM_METADATA_PREFIX = "m:";
-
-  public final static String ATOM_METADATA_NS = "xmlns:m";
-
-  public final static String ATOM_DATASERVICE_NS = "xmlns:d";
-
-  public final static String ATOM_LINK_ENTRY = "application/atom+xml;type=entry";
-
-  public final static String ATOM_LINK_FEED = "application/atom+xml;type=feed";
-
-  public final static String ATOM_LINK_REL = "http://schemas.microsoft.com/ado/2007/08/dataservices/related/";
-
-  public final static String TYPE = ATOM_METADATA_PREFIX + "type";
-
-  public final static String INLINE_LOCAL = "inline";
-
-  public final static String INLINE_FILE_PATH = "inline";
-
-  public final static String LINKS_FILE_PATH = "links";
-
-  public final static String INLINE = ATOM_METADATA_PREFIX + INLINE_LOCAL;
-
-  public final static String CONTENT = "content";
-
-  public final static String PROPERTIES = ATOM_METADATA_PREFIX + "properties";
-
-  public final static String LINK = "link";
-
-  public final static String V3_DATASERVICES_NS = "http://schemas.microsoft.com/ado/2007/08/dataservices";
-
-  public final static String V4_DATASERVICES_NS = "http://docs.oasis-open.org/odata/ns/dataservices";
+import java.util.EnumMap;
+import java.util.Map;
 
-  public final static String V3_METADATA_NS = "http://schemas.microsoft.com/ado/2007/08/dataservices/metadata";
-
-  public final static String V4_METADATA_NS = "http://docs.oasis-open.org/odata/ns/metadata";
-
-  public final static String METADATA = "metadata";
-
-  public final static String SERVICES = "services";
-
-  public final static String FEED = "feed";
-
-  public final static String ENTITY = "entity";
-
-  public final static String REF = "references";
-
-  public final static String MEDIA_CONTENT_FILENAME = "$value.bin";
-
-  public final static String SKIP_TOKEN = "skiptoken";
-
-  public final static String FILTER = "filter";
-
-  public final static String ORDERBY = "orderby";
-
-  public final static String JSON_VALUE_NAME = "value";
-
-  public final static String JSON_NEXTLINK_NAME = "odata.nextLink";
-
-  public final static String JSON_NEXTLINK_SUFFIX = "@" + JSON_NEXTLINK_NAME;
-
-  public final static String JSON_ODATAMETADATA_NAME = "odata.metadata";
-
-  public final static String JSON_NAVIGATION_BIND_SUFFIX = "@odata.bind";
-
-  public final static String JSON_NAVIGATION_SUFFIX = "@odata.navigationLinkUrl";
-
-  public final static String JSON_MEDIA_SUFFIX = "@odata.mediaEditLink";
-
-  public final static String JSON_TYPE_NAME = "odata.type";
-
-  public final static String JSON_TYPE_SUFFIX = "@" + JSON_TYPE_NAME;
-
-  public final static String JSON_ID_NAME = "odata.id";
-
-  public final static String JSON_EDITLINK_NAME = "odata.editLink";
-
-  public final static String XHTTP_HEADER_NAME = "X-HTTP-METHOD";
+public class Constants {
 
+  private final static Map<ConstantKey, String> v4constants = new EnumMap<ConstantKey, String>(ConstantKey.class);
+
+  private final static Map<ConstantKey, String> constants = new EnumMap<ConstantKey, String>(ConstantKey.class);
+
+  static {
+
+    // -----------------------------
+    // V4 only 
+    // -----------------------------
+    v4constants.put(ConstantKey.JSON_NAVIGATION_SUFFIX, "@odata.navigationLink");
+    v4constants.put(ConstantKey.DATASERVICES_NS, "http://docs.oasis-open.org/odata/ns/dataservices");
+    v4constants.put(ConstantKey.METADATA_NS, "http://docs.oasis-open.org/odata/ns/metadata");
+    v4constants.put(ConstantKey.ODATA_SERVICE_VERSION, "OData-Version");
+    v4constants.put(ConstantKey.DEFAULT_SERVICE_URL, "http://localhost:9080/StaticService/V40/Static.svc/");
+    v4constants.put(ConstantKey.ODATA_METADATA_PREFIX, "http://localhost:9080/StaticService/V40/Static.svc/$metadata#");
+    // -----------------------------
+
+    // -----------------------------
+    // V3 and defaults
+    // -----------------------------
+    constants.put(ConstantKey.ODATA_SERVICE_VERSION, "DataServiceVersion");
+    constants.put(ConstantKey.DEFAULT_SERVICE_URL, "http://localhost:9080/StaticService/V30/Static.svc/");
+    constants.put(ConstantKey.ODATA_COUNT_NAME, "odata.count");
+    constants.put(ConstantKey.ODATA_METADATA_PREFIX, "http://localhost:9080/StaticService/V30/Static.svc/$metadata#");
+    constants.put(ConstantKey.ATOM_DEF_TYPE, "Edm.String");
+    constants.put(ConstantKey.ATOM_PROPERTY_PREFIX, "d:");
+    constants.put(ConstantKey.ATOM_METADATA_PREFIX, "m:");
+    constants.put(ConstantKey.ATOM_METADATA_NS, "xmlns:m");
+    constants.put(ConstantKey.ATOM_DATASERVICE_NS, "xmlns:d");
+    constants.put(ConstantKey.ATOM_LINK_ENTRY, "application/atom+xml;type=entry");
+    constants.put(ConstantKey.ATOM_LINK_FEED, "application/atom+xml;type=feed");
+    constants.put(ConstantKey.ATOM_LINK_REL, "http://schemas.microsoft.com/ado/2007/08/dataservices/related/");
+    constants.put(ConstantKey.TYPE, "m:type");
+    constants.put(ConstantKey.INLINE_LOCAL, "inline");
+    constants.put(ConstantKey.INLINE_FILE_PATH, "inline");
+    constants.put(ConstantKey.LINKS_FILE_PATH, "links");
+    constants.put(ConstantKey.INLINE, "m:inline");
+    constants.put(ConstantKey.CONTENT, "content");
+    constants.put(ConstantKey.PROPERTIES, "m:properties");
+    constants.put(ConstantKey.LINK, "link");
+    constants.put(ConstantKey.METADATA_NS, "http://schemas.microsoft.com/ado/2007/08/dataservices/metadta");
+    constants.put(ConstantKey.DATASERVICES_NS, "http://schemas.microsoft.com/ado/2007/08/dataservices");
+    constants.put(ConstantKey.METADATA, "metadata");
+    constants.put(ConstantKey.SERVICES, "services");
+    constants.put(ConstantKey.FEED, "feed");
+    constants.put(ConstantKey.ENTITY, "entity");
+    constants.put(ConstantKey.REF, "references");
+    constants.put(ConstantKey.MEDIA_CONTENT_FILENAME, "$value.bin");
+    constants.put(ConstantKey.SKIP_TOKEN, "skiptoken");
+    constants.put(ConstantKey.FILTER, "filter");
+    constants.put(ConstantKey.ORDERBY, "orderby");
+    constants.put(ConstantKey.JSON_VALUE_NAME, "value");
+    constants.put(ConstantKey.JSON_NEXTLINK_NAME, "odata.nextLink");
+    constants.put(ConstantKey.JSON_NEXTLINK_SUFFIX, "@odata.nextLink");
+    constants.put(ConstantKey.JSON_ODATAMETADATA_NAME, "odata.metadata");
+    constants.put(ConstantKey.JSON_NAVIGATION_BIND_SUFFIX, "@odata.bind");
+    constants.put(ConstantKey.JSON_NAVIGATION_SUFFIX, "@odata.navigationLinkUrl");
+    constants.put(ConstantKey.JSON_MEDIA_SUFFIX, "@odata.mediaEditLink");
+    constants.put(ConstantKey.JSON_TYPE_NAME, "odata.type");
+    constants.put(ConstantKey.JSON_TYPE_SUFFIX, "@odata.type");
+    constants.put(ConstantKey.JSON_ID_NAME, "odata.id");
+    constants.put(ConstantKey.JSON_EDITLINK_NAME, "odata.editLink");
+    constants.put(ConstantKey.XHTTP_HEADER_NAME, "X-HTTP-METHOD");
+    // -----------------------------
+  }
+
+  public static String get(final ConstantKey key) {
+    return get(null, key);
+  }
+
+  public static String get(final ODataVersion version, final ConstantKey key) {
+    return (version == null || version == ODataVersion.v3 || !v4constants.containsKey(key)
+            ? constants : v4constants).get(key);
+  }
 }

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/c73772f0/fit/src/main/java/org/apache/olingo/fit/utils/ODataVersion.java
----------------------------------------------------------------------
diff --git a/fit/src/main/java/org/apache/olingo/fit/utils/ODataVersion.java b/fit/src/main/java/org/apache/olingo/fit/utils/ODataVersion.java
index 863bbd1..5b35d4d 100644
--- a/fit/src/main/java/org/apache/olingo/fit/utils/ODataVersion.java
+++ b/fit/src/main/java/org/apache/olingo/fit/utils/ODataVersion.java
@@ -32,4 +32,4 @@ public enum ODataVersion {
   public String getVersion() {
     return version;
   }
-};
+}

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/c73772f0/fit/src/main/java/org/apache/olingo/fit/utils/XHTTPMethodInterceptor.java
----------------------------------------------------------------------
diff --git a/fit/src/main/java/org/apache/olingo/fit/utils/XHTTPMethodInterceptor.java b/fit/src/main/java/org/apache/olingo/fit/utils/XHTTPMethodInterceptor.java
index 46fbd27..bbcc489 100644
--- a/fit/src/main/java/org/apache/olingo/fit/utils/XHTTPMethodInterceptor.java
+++ b/fit/src/main/java/org/apache/olingo/fit/utils/XHTTPMethodInterceptor.java
@@ -36,8 +36,9 @@ public class XHTTPMethodInterceptor extends AbstractPhaseInterceptor<Message> {
     @SuppressWarnings("unchecked")
     final Map<String, List<String>> headers = (Map<String, List<String>>) message.get(Message.PROTOCOL_HEADERS);
 
-    if (headers.containsKey(Constants.XHTTP_HEADER_NAME)) {
-      message.put(Message.HTTP_REQUEST_METHOD, headers.get(Constants.XHTTP_HEADER_NAME).iterator().next());
+    if (headers.containsKey(Constants.get(ConstantKey.XHTTP_HEADER_NAME))) {
+      message.put(Message.HTTP_REQUEST_METHOD, headers.get(Constants.get(ConstantKey.XHTTP_HEADER_NAME))
+              .iterator().next());
     }
   }
 }

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/c73772f0/fit/src/main/java/org/apache/olingo/fit/utils/v3/XMLUtilities.java
----------------------------------------------------------------------
diff --git a/fit/src/main/java/org/apache/olingo/fit/utils/v3/XMLUtilities.java b/fit/src/main/java/org/apache/olingo/fit/utils/v3/XMLUtilities.java
index c1a58bf..919cee6 100644
--- a/fit/src/main/java/org/apache/olingo/fit/utils/v3/XMLUtilities.java
+++ b/fit/src/main/java/org/apache/olingo/fit/utils/v3/XMLUtilities.java
@@ -32,6 +32,7 @@ import javax.xml.stream.events.StartElement;
 import org.apache.commons.io.IOUtils;
 import org.apache.olingo.fit.utils.Accept;
 import org.apache.olingo.fit.utils.Commons;
+import org.apache.olingo.fit.utils.ConstantKey;
 import org.apache.olingo.fit.utils.Constants;
 import org.apache.olingo.fit.utils.MetadataLinkInfo;
 import org.apache.olingo.fit.utils.ODataVersion;
@@ -49,7 +50,7 @@ public class XMLUtilities extends org.apache.olingo.fit.utils.AbstractXMLUtiliti
     final MetadataLinkInfo metadataLinkInfo = new MetadataLinkInfo();
     Commons.getLinkInfo().put(version, metadataLinkInfo);
 
-    final InputStream metadata = fsManager.readFile(Constants.METADATA, Accept.XML);
+    final InputStream metadata = fsManager.readFile(Constants.get(version, ConstantKey.METADATA), Accept.XML);
     final XMLEventReader reader = getEventReader(metadata);
 
     try {
@@ -69,7 +70,7 @@ public class XMLUtilities extends org.apache.olingo.fit.utils.AbstractXMLUtiliti
   private void retrieveLinks(final XmlElement entitySetElement, final MetadataLinkInfo metadataLinkInfo)
           throws Exception {
 
-    final InputStream metadata = fsManager.readFile(Constants.METADATA, Accept.XML);
+    final InputStream metadata = fsManager.readFile(Constants.get(version, ConstantKey.METADATA), Accept.XML);
 
     final ByteArrayOutputStream bos = new ByteArrayOutputStream();
     IOUtils.copy(metadata, bos);
@@ -120,7 +121,7 @@ public class XMLUtilities extends org.apache.olingo.fit.utils.AbstractXMLUtiliti
 
   private Map.Entry<String, Boolean> getTargetInfo(final StartElement element, final String linkName)
           throws Exception {
-    final InputStream metadata = fsManager.readFile(Constants.METADATA, Accept.XML);
+    final InputStream metadata = fsManager.readFile(Constants.get(version, ConstantKey.METADATA), Accept.XML);
 
     final ByteArrayOutputStream bos = new ByteArrayOutputStream();
     IOUtils.copy(metadata, bos);

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/c73772f0/fit/src/main/java/org/apache/olingo/fit/utils/v4/XMLUtilities.java
----------------------------------------------------------------------
diff --git a/fit/src/main/java/org/apache/olingo/fit/utils/v4/XMLUtilities.java b/fit/src/main/java/org/apache/olingo/fit/utils/v4/XMLUtilities.java
index 1cf8d38..77c46be 100644
--- a/fit/src/main/java/org/apache/olingo/fit/utils/v4/XMLUtilities.java
+++ b/fit/src/main/java/org/apache/olingo/fit/utils/v4/XMLUtilities.java
@@ -30,6 +30,7 @@ import javax.xml.stream.XMLEventReader;
 import org.apache.commons.io.IOUtils;
 import org.apache.olingo.fit.utils.Accept;
 import org.apache.olingo.fit.utils.Commons;
+import org.apache.olingo.fit.utils.ConstantKey;
 import org.apache.olingo.fit.utils.Constants;
 import org.apache.olingo.fit.utils.MetadataLinkInfo;
 import org.apache.olingo.fit.utils.ODataVersion;
@@ -47,7 +48,7 @@ public class XMLUtilities extends org.apache.olingo.fit.utils.AbstractXMLUtiliti
     final MetadataLinkInfo metadataLinkInfo = new MetadataLinkInfo();
     Commons.getLinkInfo().put(version, metadataLinkInfo);
 
-    final InputStream metadata = fsManager.readFile(Constants.METADATA, Accept.XML);
+    final InputStream metadata = fsManager.readFile(Constants.get(version, ConstantKey.METADATA), Accept.XML);
 
     final ByteArrayOutputStream bos = new ByteArrayOutputStream();
     IOUtils.copy(metadata, bos);

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/c73772f0/lib/client-api/src/main/java/org/apache/olingo/client/api/data/ServiceDocument.java
----------------------------------------------------------------------
diff --git a/lib/client-api/src/main/java/org/apache/olingo/client/api/data/ServiceDocument.java b/lib/client-api/src/main/java/org/apache/olingo/client/api/data/ServiceDocument.java
index d545567..a6deb49 100644
--- a/lib/client-api/src/main/java/org/apache/olingo/client/api/data/ServiceDocument.java
+++ b/lib/client-api/src/main/java/org/apache/olingo/client/api/data/ServiceDocument.java
@@ -38,20 +38,6 @@ public interface ServiceDocument {
   URI getBaseURI();
 
   /**
-   * Returns metadata context.
-   *
-   * @return metadata context
-   */
-  String getMetadataContext();
-
-  /**
-   * Returns metadata ETag.
-   *
-   * @return metadata ETag
-   */
-  String getMetadataETag();
-
-  /**
    * Gets top level entity sets.
    *
    * @return top level entity sets.
@@ -134,5 +120,4 @@ public interface ServiceDocument {
    * @return related service document with given title if found, otherwise null
    */
   ServiceDocumentItem getRelatedServiceDocumentByTitle(String title);
-
 }

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/c73772f0/lib/client-core/src/main/java/org/apache/olingo/client/core/communication/request/retrieve/ODataPropertyRequestImpl.java
----------------------------------------------------------------------
diff --git a/lib/client-core/src/main/java/org/apache/olingo/client/core/communication/request/retrieve/ODataPropertyRequestImpl.java b/lib/client-core/src/main/java/org/apache/olingo/client/core/communication/request/retrieve/ODataPropertyRequestImpl.java
index 7878805..e8f5ae3 100644
--- a/lib/client-core/src/main/java/org/apache/olingo/client/core/communication/request/retrieve/ODataPropertyRequestImpl.java
+++ b/lib/client-core/src/main/java/org/apache/olingo/client/core/communication/request/retrieve/ODataPropertyRequestImpl.java
@@ -88,7 +88,7 @@ public class ODataPropertyRequestImpl<T extends CommonODataProperty>
         try {
           final Container<Property> container =
                   odataClient.getDeserializer().toProperty(
-                          res.getEntity().getContent(), ODataFormat.fromString(getContentType()));
+                  res.getEntity().getContent(), ODataFormat.fromString(getContentType()));
 
           property = (T) odataClient.getBinder().getODataProperty(extractFromContainer(container));
         } catch (IOException e) {

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/c73772f0/lib/client-core/src/main/java/org/apache/olingo/client/core/data/AbstractServiceDocument.java
----------------------------------------------------------------------
diff --git a/lib/client-core/src/main/java/org/apache/olingo/client/core/data/AbstractServiceDocument.java b/lib/client-core/src/main/java/org/apache/olingo/client/core/data/AbstractServiceDocument.java
index 57ba0ef..83b3a12 100644
--- a/lib/client-core/src/main/java/org/apache/olingo/client/core/data/AbstractServiceDocument.java
+++ b/lib/client-core/src/main/java/org/apache/olingo/client/core/data/AbstractServiceDocument.java
@@ -18,6 +18,7 @@
  */
 package org.apache.olingo.client.core.data;
 
+import java.net.URI;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
@@ -28,6 +29,7 @@ import org.apache.commons.lang3.builder.ReflectionToStringBuilder;
 import org.apache.commons.lang3.builder.ToStringStyle;
 import org.apache.olingo.client.api.data.ServiceDocument;
 import org.apache.olingo.client.api.data.ServiceDocumentItem;
+import org.apache.olingo.commons.api.Constants;
 
 public abstract class AbstractServiceDocument implements ServiceDocument {
 
@@ -35,14 +37,35 @@ public abstract class AbstractServiceDocument implements ServiceDocument {
 
   private final List<ServiceDocumentItem> entitySets = new ArrayList<ServiceDocumentItem>();
 
+  private String metadata;
+
   @Override
-  public String getMetadataContext() {
-    return null;
+  public URI getBaseURI() {
+    URI baseURI = null;
+    if (metadata != null) {
+      final String metadataURI = getMetadata();
+      baseURI = URI.create(metadataURI.substring(0, metadataURI.indexOf(Constants.METADATA)));
+    }
+
+    return baseURI;
   }
 
-  @Override
-  public String getMetadataETag() {
-    return null;
+  /**
+   * Gets the metadata URI.
+   *
+   * @return the metadata URI
+   */
+  public String getMetadata() {
+    return metadata;
+  }
+
+  /**
+   * Sets the metadata URI.
+   *
+   * @param metadata metadata URI.
+   */
+  public void setMetadata(final String metadata) {
+    this.metadata = metadata;
   }
 
   @Override

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/c73772f0/lib/client-core/src/main/java/org/apache/olingo/client/core/data/JSONServiceDocumentDeserializer.java
----------------------------------------------------------------------
diff --git a/lib/client-core/src/main/java/org/apache/olingo/client/core/data/JSONServiceDocumentDeserializer.java b/lib/client-core/src/main/java/org/apache/olingo/client/core/data/JSONServiceDocumentDeserializer.java
index 8594f90..f949e16 100644
--- a/lib/client-core/src/main/java/org/apache/olingo/client/core/data/JSONServiceDocumentDeserializer.java
+++ b/lib/client-core/src/main/java/org/apache/olingo/client/core/data/JSONServiceDocumentDeserializer.java
@@ -25,17 +25,20 @@ import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.node.ObjectNode;
 
 import java.io.IOException;
+import java.net.URI;
 import java.util.Iterator;
 
 import org.apache.commons.lang3.StringUtils;
 import org.apache.olingo.commons.api.Constants;
+import org.apache.olingo.commons.api.data.Container;
 import org.apache.olingo.commons.api.edm.constants.ODataServiceVersion;
 import org.apache.olingo.commons.core.data.ODataJacksonDeserializer;
 
-public class JSONServiceDocumentDeserializer extends ODataJacksonDeserializer<AbstractServiceDocument> {
+public class JSONServiceDocumentDeserializer extends ODataJacksonDeserializer<Container<AbstractServiceDocument>> {
 
   @Override
-  protected AbstractServiceDocument doDeserialize(final JsonParser parser, final DeserializationContext ctxt)
+  protected Container<AbstractServiceDocument> doDeserialize(
+          final JsonParser parser, final DeserializationContext ctxt)
           throws IOException, JsonProcessingException {
 
     final ObjectNode tree = (ObjectNode) parser.getCodec().readTree(parser);
@@ -44,19 +47,28 @@ public class JSONServiceDocumentDeserializer extends ODataJacksonDeserializer<Ab
             ? new org.apache.olingo.client.core.data.v3.JSONServiceDocumentImpl()
             : new org.apache.olingo.client.core.data.v4.JSONServiceDocumentImpl();
 
-    if (tree.hasNonNull(Constants.JSON_METADATA)
-            && serviceDocument instanceof org.apache.olingo.client.core.data.v3.JSONServiceDocumentImpl) {
+    final String metadataETag;
+    final URI contextURL;
 
-      ((org.apache.olingo.client.core.data.v3.JSONServiceDocumentImpl) serviceDocument).
-              setMetadata(tree.get(Constants.JSON_METADATA).textValue());
+    if (tree.hasNonNull(Constants.JSON_METADATA_ETAG)) {
+      metadataETag = tree.get(Constants.JSON_METADATA_ETAG).textValue();
+      tree.remove(Constants.JSON_METADATA_ETAG);
+    } else {
+      metadataETag = null;
     }
-    if (tree.hasNonNull(Constants.JSON_CONTEXT)
-            && serviceDocument instanceof org.apache.olingo.client.core.data.v4.JSONServiceDocumentImpl) {
 
-      ((org.apache.olingo.client.core.data.v4.JSONServiceDocumentImpl) serviceDocument).
-              setMetadataContext(tree.get(Constants.JSON_CONTEXT).textValue());
+    if (tree.hasNonNull(Constants.JSON_CONTEXT)) {
+      contextURL = URI.create(tree.get(Constants.JSON_CONTEXT).textValue());
+      tree.remove(Constants.JSON_CONTEXT);
+    } else if (tree.hasNonNull(Constants.JSON_METADATA)) {
+      contextURL = URI.create(tree.get(Constants.JSON_METADATA).textValue());
+      tree.remove(Constants.JSON_METADATA);
+    } else {
+      contextURL = null;
     }
 
+    serviceDocument.setMetadata(contextURL == null ? null : contextURL.toASCIIString());
+
     for (final Iterator<JsonNode> itor = tree.get(Constants.VALUE).elements(); itor.hasNext();) {
       final JsonNode node = itor.next();
 
@@ -79,7 +91,6 @@ public class JSONServiceDocumentDeserializer extends ODataJacksonDeserializer<Ab
       }
     }
 
-    return serviceDocument;
+    return new Container<AbstractServiceDocument>(contextURL, metadataETag, serviceDocument);
   }
-
 }

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/c73772f0/lib/client-core/src/main/java/org/apache/olingo/client/core/data/XMLServiceDocumentDeserializer.java
----------------------------------------------------------------------
diff --git a/lib/client-core/src/main/java/org/apache/olingo/client/core/data/XMLServiceDocumentDeserializer.java b/lib/client-core/src/main/java/org/apache/olingo/client/core/data/XMLServiceDocumentDeserializer.java
index ef62f13..1b18040 100644
--- a/lib/client-core/src/main/java/org/apache/olingo/client/core/data/XMLServiceDocumentDeserializer.java
+++ b/lib/client-core/src/main/java/org/apache/olingo/client/core/data/XMLServiceDocumentDeserializer.java
@@ -29,9 +29,11 @@ import java.io.IOException;
 import java.net.URI;
 
 import org.apache.olingo.client.api.data.ServiceDocument;
+import org.apache.olingo.client.core.uri.URIUtils;
+import org.apache.olingo.commons.api.data.Container;
 import org.apache.olingo.commons.api.edm.constants.ODataServiceVersion;
 
-public class XMLServiceDocumentDeserializer extends ODataJacksonDeserializer<ServiceDocument> {
+public class XMLServiceDocumentDeserializer extends ODataJacksonDeserializer<Container<ServiceDocument>> {
 
   private String getTitle(final JsonParser jp) throws IOException {
     String title = jp.nextTextValue();
@@ -67,32 +69,28 @@ public class XMLServiceDocumentDeserializer extends ODataJacksonDeserializer<Ser
   }
 
   @Override
-  protected ServiceDocument doDeserialize(final JsonParser jp, final DeserializationContext ctxt)
+  protected Container<ServiceDocument> doDeserialize(final JsonParser jp, final DeserializationContext ctxt)
           throws IOException, JsonProcessingException {
 
     final AbstractServiceDocument sdoc = ODataServiceVersion.V30 == version
             ? new org.apache.olingo.client.core.data.v3.XMLServiceDocumentImpl()
             : new org.apache.olingo.client.core.data.v4.XMLServiceDocumentImpl();
 
+    URI contextURL = null;
+    String metadataETag = null;
+    String base = null;
+
     for (; jp.getCurrentToken() != JsonToken.END_OBJECT
             || !"service".equals(((FromXmlParser) jp).getStaxReader().getLocalName()); jp.nextToken()) {
 
       final JsonToken token = jp.getCurrentToken();
       if (token == JsonToken.FIELD_NAME) {
         if ("base".equals(jp.getCurrentName())) {
-          if (sdoc instanceof org.apache.olingo.client.core.data.v3.XMLServiceDocumentImpl) {
-            ((org.apache.olingo.client.core.data.v3.XMLServiceDocumentImpl) sdoc).
-                    setBaseURI(URI.create(jp.nextTextValue()));
-          } else {
-            ((org.apache.olingo.client.core.data.v4.XMLServiceDocumentImpl) sdoc).
-                    setBaseURI(URI.create(jp.nextTextValue()));
-          }
+          base = jp.nextTextValue();
         } else if ("context".equals(jp.getCurrentName())) {
-          ((org.apache.olingo.client.core.data.v4.XMLServiceDocumentImpl) sdoc).
-                  setMetadataContext(jp.nextTextValue());
+          contextURL = URI.create(jp.nextTextValue());
         } else if ("metadata-etag".equals(jp.getCurrentName())) {
-          ((org.apache.olingo.client.core.data.v4.XMLServiceDocumentImpl) sdoc).
-                  setMetadataETag(jp.nextTextValue());
+          metadataETag = jp.nextTextValue();
         } else if ("workspace".equals(jp.getCurrentName())) {
           jp.nextToken();
           jp.nextToken();
@@ -115,7 +113,12 @@ public class XMLServiceDocumentDeserializer extends ODataJacksonDeserializer<Ser
       }
     }
 
-    return sdoc;
-  }
+    sdoc.setMetadata((contextURL == null
+            ? URIUtils.getURI(base, "$metadata")
+            : URIUtils.getURI(base, contextURL.toASCIIString())).toASCIIString());
 
+    return new Container<ServiceDocument>(
+            contextURL == null ? null : URIUtils.getURI(sdoc.getBaseURI(), contextURL),
+            metadataETag, sdoc);
+  }
 }