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Posted to commits@olingo.apache.org by ra...@apache.org on 2015/04/20 16:28:26 UTC

[06/22] olingo-odata4 git commit: [OLINGO-545] TecSvc: Support of cyclic expands and filtering on arbitrary level

[OLINGO-545] TecSvc: Support of cyclic expands and filtering on arbitrary
level


Project: http://git-wip-us.apache.org/repos/asf/olingo-odata4/repo
Commit: http://git-wip-us.apache.org/repos/asf/olingo-odata4/commit/518a3a41
Tree: http://git-wip-us.apache.org/repos/asf/olingo-odata4/tree/518a3a41
Diff: http://git-wip-us.apache.org/repos/asf/olingo-odata4/diff/518a3a41

Branch: refs/heads/OLINGO-573
Commit: 518a3a418e9e79e2a3ce5feb61e175083812c2d8
Parents: 583c4bd
Author: Christian Holzer <c....@sap.com>
Authored: Mon Apr 6 08:25:00 2015 +0200
Committer: Christian Holzer <c....@sap.com>
Committed: Tue Apr 7 08:26:05 2015 +0200

----------------------------------------------------------------------
 .../ExpandWithSystemQueryOptionsITCase.java     | 160 +++++++++++++-
 .../processor/TechnicalEntityProcessor.java     |   6 +-
 .../ExpandSystemQueryOptionHandler.java         | 208 +++++++++++++------
 .../expression/ExpressionVisitorImpl.java       |  10 +-
 .../queryoptions/options/FilterHandler.java     |   6 +-
 .../queryoptions/options/OrderByHandler.java    |  12 +-
 6 files changed, 320 insertions(+), 82 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/518a3a41/fit/src/test/java/org/apache/olingo/fit/tecsvc/client/ExpandWithSystemQueryOptionsITCase.java
----------------------------------------------------------------------
diff --git a/fit/src/test/java/org/apache/olingo/fit/tecsvc/client/ExpandWithSystemQueryOptionsITCase.java b/fit/src/test/java/org/apache/olingo/fit/tecsvc/client/ExpandWithSystemQueryOptionsITCase.java
index 2db9535..1a6b411 100644
--- a/fit/src/test/java/org/apache/olingo/fit/tecsvc/client/ExpandWithSystemQueryOptionsITCase.java
+++ b/fit/src/test/java/org/apache/olingo/fit/tecsvc/client/ExpandWithSystemQueryOptionsITCase.java
@@ -19,6 +19,7 @@
 package org.apache.olingo.fit.tecsvc.client;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.fail;
 
 import java.net.URI;
@@ -119,7 +120,7 @@ public class ExpandWithSystemQueryOptionsITCase extends AbstractBaseTestITCase {
       }
     }
   }
-
+  
   @Test
   public void testSkip() {
     final Map<QueryOption, Object> options = new HashMap<QueryOption, Object>();
@@ -290,7 +291,162 @@ public class ExpandWithSystemQueryOptionsITCase extends AbstractBaseTestITCase {
     assertEquals(HttpStatusCode.OK.getStatusCode(), response.getStatusCode());
     assertEquals(4, entities.size());
   }
-
+  
+  @Test
+  public void testCyclicExpand() {
+    // Expand entity in the following order
+    // 1 => 2 => 1
+    // Entity with Key (PropertyInt16=1, PrroperyString='1') holds references to (PropertyInt16=1, PropertyString='1') 
+    // and (PropertyInt16=1, PropertyString='2')
+    // Entity with Key (PropertyInt16=1, PropertyString='2') holds references to (PropertyInt16=1, PropertyString='1')
+    // Define filters to select explicit the entities at any level => Circle
+    
+    final ODataClient client = getClient();
+    final Map<QueryOption, Object> options = new HashMap<QueryOption, Object>();
+    options.put(QueryOption.EXPAND, NAV_PROPERTY_ET_TWO_KEY_NAV_MANY 
+                                  + "($expand=" + NAV_PROPERTY_ET_TWO_KEY_NAV_MANY 
+                                  + "($expand=" + NAV_PROPERTY_ET_TWO_KEY_NAV_MANY + "))");
+    options.put(QueryOption.FILTER, "PropertyString eq '2'");
+    
+    final Map<String, Object> keys = new HashMap<String, Object>();
+    keys.put(PROPERTY_INT16, 1);
+    keys.put(PROPERTY_STRING, "1");
+    
+    final URI uri = client.newURIBuilder(SERVICE_URI)
+                          .appendEntitySetSegment(ES_TWO_KEY_NAV)
+                          .appendKeySegment(keys)
+                          .expandWithOptions(NAV_PROPERTY_ET_TWO_KEY_NAV_MANY, options)
+                          .build();
+    
+    final ODataRetrieveResponse<ODataEntity> response = client.getRetrieveRequestFactory()
+                                                              .getEntityRequest(uri)
+                                                              .execute();
+    
+    assertEquals(HttpStatusCode.OK.getStatusCode(), response.getStatusCode());
+    assertNotNull(response.getBody().getNavigationLink(NAV_PROPERTY_ET_TWO_KEY_NAV_MANY));
+    assertEquals(1, response.getBody().getNavigationLink(NAV_PROPERTY_ET_TWO_KEY_NAV_MANY)
+                                      .asInlineEntitySet()
+                                      .getEntitySet()
+                                      .getEntities()
+                                      .size());
+    
+    final ODataEntity entitySecondLevel = response.getBody().getNavigationLink(NAV_PROPERTY_ET_TWO_KEY_NAV_MANY)
+                                                            .asInlineEntitySet()
+                                                            .getEntitySet()
+                                                            .getEntities()
+                                                            .get(0);
+    
+    assertEquals(1, entitySecondLevel.getProperty(PROPERTY_INT16).getPrimitiveValue().toValue());
+    assertEquals("2", entitySecondLevel.getProperty(PROPERTY_STRING).getPrimitiveValue().toValue());
+    
+    assertNotNull(entitySecondLevel.getNavigationLink(NAV_PROPERTY_ET_TWO_KEY_NAV_MANY));
+    assertEquals(1, entitySecondLevel.getNavigationLink(NAV_PROPERTY_ET_TWO_KEY_NAV_MANY)
+                                     .asInlineEntitySet()
+                                     .getEntitySet()
+                                     .getEntities()
+                                     .size());
+    
+    final ODataEntity entityThirdLevel = entitySecondLevel.getNavigationLink(NAV_PROPERTY_ET_TWO_KEY_NAV_MANY)
+                                                          .asInlineEntitySet()
+                                                          .getEntitySet()
+                                                          .getEntities()
+                                                          .get(0);
+    
+    assertEquals(1, entityThirdLevel.getProperty(PROPERTY_INT16).getPrimitiveValue().toValue());
+    assertEquals("1", entityThirdLevel.getProperty(PROPERTY_STRING).getPrimitiveValue().toValue());
+    
+    assertNotNull(entityThirdLevel.getNavigationLink(NAV_PROPERTY_ET_TWO_KEY_NAV_MANY));
+    assertEquals(2, entityThirdLevel.getNavigationLink(NAV_PROPERTY_ET_TWO_KEY_NAV_MANY)
+                                    .asInlineEntitySet()
+                                    .getEntitySet()
+                                    .getEntities()
+                                    .size());
+    
+    final List<ODataEntity> fourthLevelEntites = entityThirdLevel.getNavigationLink(NAV_PROPERTY_ET_TWO_KEY_NAV_MANY)
+                                                                 .asInlineEntitySet()
+                                                                 .getEntitySet()
+                                                                 .getEntities();
+    
+    assertEquals(1, fourthLevelEntites.get(0).getProperty(PROPERTY_INT16).getPrimitiveValue().toValue());
+    assertEquals("1", fourthLevelEntites.get(0).getProperty(PROPERTY_STRING).getPrimitiveValue().toValue());
+
+    assertEquals(1, fourthLevelEntites.get(1).getProperty(PROPERTY_INT16).getPrimitiveValue().toValue());
+    assertEquals("2", fourthLevelEntites.get(1).getProperty(PROPERTY_STRING).getPrimitiveValue().toValue());
+  }
+  
+  @Test
+  public void testSystemQueryOptionOnThirdLevel() {
+    final ODataClient client = getClient();
+    final Map<QueryOption, Object> options = new HashMap<QueryOption, Object>();
+    options.put(QueryOption.EXPAND, NAV_PROPERTY_ET_TWO_KEY_NAV_MANY 
+                                  + "($expand=" + NAV_PROPERTY_ET_TWO_KEY_NAV_MANY 
+                                  + "($expand=" + NAV_PROPERTY_ET_TWO_KEY_NAV_MANY 
+                                  + ";$filter=PropertyString eq '1'))");
+    options.put(QueryOption.FILTER, "PropertyString eq '2'");
+    
+    final Map<String, Object> keys = new HashMap<String, Object>();
+    keys.put(PROPERTY_INT16, 1);
+    keys.put(PROPERTY_STRING, "1");
+    
+    final URI uri = client.newURIBuilder(SERVICE_URI)
+                          .appendEntitySetSegment(ES_TWO_KEY_NAV)
+                          .appendKeySegment(keys)
+                          .expandWithOptions(NAV_PROPERTY_ET_TWO_KEY_NAV_MANY, options)
+                          .build();
+    
+    final ODataRetrieveResponse<ODataEntity> response = client.getRetrieveRequestFactory()
+                                                              .getEntityRequest(uri)
+                                                              .execute();
+    
+    assertEquals(HttpStatusCode.OK.getStatusCode(), response.getStatusCode());
+    assertNotNull(response.getBody().getNavigationLink(NAV_PROPERTY_ET_TWO_KEY_NAV_MANY));
+    assertEquals(1, response.getBody().getNavigationLink(NAV_PROPERTY_ET_TWO_KEY_NAV_MANY)
+                                      .asInlineEntitySet()
+                                      .getEntitySet()
+                                      .getEntities()
+                                      .size());
+    
+    final ODataEntity entitySecondLevel = response.getBody().getNavigationLink(NAV_PROPERTY_ET_TWO_KEY_NAV_MANY)
+                                                            .asInlineEntitySet()
+                                                            .getEntitySet()
+                                                            .getEntities()
+                                                            .get(0);
+    
+    assertEquals(1, entitySecondLevel.getProperty(PROPERTY_INT16).getPrimitiveValue().toValue());
+    assertEquals("2", entitySecondLevel.getProperty(PROPERTY_STRING).getPrimitiveValue().toValue());
+    
+    assertNotNull(entitySecondLevel.getNavigationLink(NAV_PROPERTY_ET_TWO_KEY_NAV_MANY));
+    assertEquals(1, entitySecondLevel.getNavigationLink(NAV_PROPERTY_ET_TWO_KEY_NAV_MANY)
+                                     .asInlineEntitySet()
+                                     .getEntitySet()
+                                     .getEntities()
+                                     .size());
+    
+    final ODataEntity entityThirdLevel = entitySecondLevel.getNavigationLink(NAV_PROPERTY_ET_TWO_KEY_NAV_MANY)
+                                                          .asInlineEntitySet()
+                                                          .getEntitySet()
+                                                          .getEntities()
+                                                          .get(0);
+    
+    assertEquals(1, entityThirdLevel.getProperty(PROPERTY_INT16).getPrimitiveValue().toValue());
+    assertEquals("1", entityThirdLevel.getProperty(PROPERTY_STRING).getPrimitiveValue().toValue());
+    
+    assertNotNull(entityThirdLevel.getNavigationLink(NAV_PROPERTY_ET_TWO_KEY_NAV_MANY));
+    assertEquals(1, entityThirdLevel.getNavigationLink(NAV_PROPERTY_ET_TWO_KEY_NAV_MANY)
+                                    .asInlineEntitySet()
+                                    .getEntitySet()
+                                    .getEntities()
+                                    .size());
+    
+    final List<ODataEntity> fourthLevelEntites = entityThirdLevel.getNavigationLink(NAV_PROPERTY_ET_TWO_KEY_NAV_MANY)
+                                                                 .asInlineEntitySet()
+                                                                 .getEntitySet()
+                                                                 .getEntities();
+    
+    assertEquals(1, fourthLevelEntites.get(0).getProperty(PROPERTY_INT16).getPrimitiveValue().toValue());
+    assertEquals("1", fourthLevelEntites.get(0).getProperty(PROPERTY_STRING).getPrimitiveValue().toValue());
+  }
+  
   private ODataRetrieveResponse<ODataEntitySet> buildRequest(final String entitySet, final String navigationProperty,
       final Map<QueryOption, Object> expandOptions) {
     return buildRequest(entitySet, navigationProperty, expandOptions, null);

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/518a3a41/lib/server-tecsvc/src/main/java/org/apache/olingo/server/tecsvc/processor/TechnicalEntityProcessor.java
----------------------------------------------------------------------
diff --git a/lib/server-tecsvc/src/main/java/org/apache/olingo/server/tecsvc/processor/TechnicalEntityProcessor.java b/lib/server-tecsvc/src/main/java/org/apache/olingo/server/tecsvc/processor/TechnicalEntityProcessor.java
index ed120b9..a2774e3 100644
--- a/lib/server-tecsvc/src/main/java/org/apache/olingo/server/tecsvc/processor/TechnicalEntityProcessor.java
+++ b/lib/server-tecsvc/src/main/java/org/apache/olingo/server/tecsvc/processor/TechnicalEntityProcessor.java
@@ -125,7 +125,9 @@ public class TechnicalEntityProcessor extends TechnicalProcessor
       // Create a shallow copy of each entity. So the expanded navigation properties can be modified for serialization,
       // without affecting the data stored in the database.
       final ExpandSystemQueryOptionHandler expandHandler = new ExpandSystemQueryOptionHandler();
-      final EntitySet entitySetSerialization = expandHandler.copyEntitySetShallowRekursive(entitySet);
+      final EntitySet entitySetSerialization = expandHandler.transformEntitySetGraphToTree(entitySet, 
+                                                                                           edmEntitySet, 
+                                                                                           expand);
       expandHandler.applyExpandQueryOptions(entitySetSerialization, edmEntitySet, expand);
 
       // Serialize
@@ -186,7 +188,7 @@ public class TechnicalEntityProcessor extends TechnicalProcessor
     final SelectOption select = uriInfo.getSelectOption();
 
     final ExpandSystemQueryOptionHandler expandHandler = new ExpandSystemQueryOptionHandler();
-    final Entity entitySerialization = expandHandler.copyEntityShallowRekursive(entity);
+    final Entity entitySerialization = expandHandler.transformEntityGraphToTree(entity, edmEntitySet, expand);
     expandHandler.applyExpandQueryOptions(entitySerialization, edmEntitySet, expand);
 
     response.setContent(serializer.entity(

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/518a3a41/lib/server-tecsvc/src/main/java/org/apache/olingo/server/tecsvc/processor/queryoptions/ExpandSystemQueryOptionHandler.java
----------------------------------------------------------------------
diff --git a/lib/server-tecsvc/src/main/java/org/apache/olingo/server/tecsvc/processor/queryoptions/ExpandSystemQueryOptionHandler.java b/lib/server-tecsvc/src/main/java/org/apache/olingo/server/tecsvc/processor/queryoptions/ExpandSystemQueryOptionHandler.java
index 3ae3b3a..ce1b774 100644
--- a/lib/server-tecsvc/src/main/java/org/apache/olingo/server/tecsvc/processor/queryoptions/ExpandSystemQueryOptionHandler.java
+++ b/lib/server-tecsvc/src/main/java/org/apache/olingo/server/tecsvc/processor/queryoptions/ExpandSystemQueryOptionHandler.java
@@ -18,15 +18,18 @@
  */
 package org.apache.olingo.server.tecsvc.processor.queryoptions;
 
-import java.util.IdentityHashMap;
+import java.util.HashSet;
 import java.util.List;
 import java.util.Locale;
+import java.util.Set;
 
 import org.apache.olingo.commons.api.data.Entity;
 import org.apache.olingo.commons.api.data.EntitySet;
 import org.apache.olingo.commons.api.data.Link;
+import org.apache.olingo.commons.api.edm.EdmBindingTarget;
 import org.apache.olingo.commons.api.edm.EdmEntitySet;
 import org.apache.olingo.commons.api.edm.EdmEntityType;
+import org.apache.olingo.commons.api.edm.EdmNavigationProperty;
 import org.apache.olingo.commons.api.http.HttpStatusCode;
 import org.apache.olingo.commons.core.data.EntityImpl;
 import org.apache.olingo.commons.core.data.EntitySetImpl;
@@ -47,8 +50,6 @@ import org.apache.olingo.server.tecsvc.processor.queryoptions.options.SkipHandle
 import org.apache.olingo.server.tecsvc.processor.queryoptions.options.TopHandler;
 
 public class ExpandSystemQueryOptionHandler {
-  private IdentityHashMap<Entity, Entity> copiedEntities = new IdentityHashMap<Entity, Entity>();
-  private IdentityHashMap<EntitySet, EntitySet> copiedEntitySets = new IdentityHashMap<EntitySet, EntitySet>();
 
   public void applyExpandQueryOptions(final EntitySet entitySet, final EdmEntitySet edmEntitySet,
       final ExpandOption expandOption) throws ODataApplicationException {
@@ -70,20 +71,26 @@ public class ExpandSystemQueryOptionHandler {
     applyExpandOptionToEntity(entity, edmEntitySet, expandOption);
   }
 
-  private void applyExpandOptionToEntity(final Entity entity, final EdmEntitySet edmEntitySet,
+  private void applyExpandOptionToEntity(final Entity entity, final EdmBindingTarget edmBindingTarget,
       final ExpandOption expandOption) throws ODataApplicationException {
-    final EdmEntityType entityType = edmEntitySet.getEntityType();
+    final EdmEntityType entityType = edmBindingTarget.getEntityType();
 
     for (ExpandItem item : expandOption.getExpandItems()) {
       final List<UriResource> uriResourceParts = item.getResourcePath().getUriResourceParts();
       if (uriResourceParts.size() == 1 && uriResourceParts.get(0) instanceof UriResourceNavigation) {
         final String navPropertyName = ((UriResourceNavigation) uriResourceParts.get(0)).getProperty().getName();
-        final EdmEntitySet targetEdmEntitySet = (EdmEntitySet) edmEntitySet.getRelatedBindingTarget(navPropertyName);
+        final EdmBindingTarget targetEdmEntitySet = edmBindingTarget.getRelatedBindingTarget(navPropertyName);
 
         final Link link = entity.getNavigationLink(navPropertyName);
         if (link != null && entityType.getNavigationProperty(navPropertyName).isCollection()) {
-          applyOptionsToEntityCollection(link.getInlineEntitySet(), targetEdmEntitySet, item.getFilterOption(),
-              item.getOrderByOption(), item.getCountOption(), item.getSkipOption(), item.getTopOption());
+          applyOptionsToEntityCollection(link.getInlineEntitySet(), 
+                                         targetEdmEntitySet, 
+                                         item.getFilterOption(),
+                                         item.getOrderByOption(), 
+                                         item.getCountOption(), 
+                                         item.getSkipOption(), 
+                                         item.getTopOption(), 
+                                         item.getExpandOption());
         }
       } else {
         throw new ODataApplicationException("Not supported resource part in expand system query option",
@@ -92,77 +99,150 @@ public class ExpandSystemQueryOptionHandler {
     }
   }
 
-  private void applyOptionsToEntityCollection(final EntitySet entitySet, final EdmEntitySet edmEntitySet,
+  private void applyOptionsToEntityCollection(final EntitySet entitySet, final EdmBindingTarget edmBindingTarget,
       final FilterOption filterOption, final OrderByOption orderByOption, final CountOption countOption,
-      final SkipOption skipOption, final TopOption topOption) throws ODataApplicationException {
+      final SkipOption skipOption, final TopOption topOption, final ExpandOption expandOption) 
+          throws ODataApplicationException {
 
-    FilterHandler.applyFilterSystemQuery(filterOption, entitySet, edmEntitySet);
-    OrderByHandler.applyOrderByOption(orderByOption, entitySet, edmEntitySet);
+    FilterHandler.applyFilterSystemQuery(filterOption, entitySet, edmBindingTarget);
+    OrderByHandler.applyOrderByOption(orderByOption, entitySet, edmBindingTarget);
     // TODO Add CountHandler
     SkipHandler.applySkipSystemQueryHandler(skipOption, entitySet);
     TopHandler.applyTopSystemQueryOption(topOption, entitySet);
+    
+    // Apply nested expand system query options to remaining entities
+    if(expandOption != null) {
+      for(final Entity entity : entitySet.getEntities()) {
+        applyExpandOptionToEntity(entity, edmBindingTarget, expandOption);
+      }
+    }
   }
 
-  public EntitySet copyEntitySetShallowRekursive(final EntitySet entitySet) {
-    if (!copiedEntitySets.containsKey(entitySet)) {
-      final EntitySet copiedEntitySet = new EntitySetImpl();
-      copiedEntitySet.setCount(entitySet.getCount());
-      copiedEntitySet.setDeltaLink(entitySet.getDeltaLink());
-      copiedEntitySet.setNext(entitySet.getNext());
-
-      copiedEntitySets.put(entitySet, copiedEntitySet);
-      copiedEntitySets.put(copiedEntitySet, copiedEntitySet);
-
-      for (Entity entity : entitySet.getEntities()) {
-        copiedEntitySet.getEntities().add(copyEntityShallowRekursive(entity));
-      }
-      return copiedEntitySet;
+  public EntitySet transformEntitySetGraphToTree(final EntitySet entitySet, final EdmBindingTarget edmBindingTarget, 
+      final ExpandOption expand) throws ODataApplicationException {
+    
+    final EntitySet newEntitySet = newEntitySet(entitySet);
+    
+    for(final Entity entity : entitySet.getEntities()) {
+      newEntitySet.getEntities().add(transformEntityGraphToTree(entity, edmBindingTarget, expand));
     }
-    return copiedEntitySets.get(entitySet);
+    
+    return newEntitySet;
   }
+  
+  public Entity transformEntityGraphToTree(final Entity entity, EdmBindingTarget edmEntitySet, 
+      final ExpandOption expand) throws ODataApplicationException {
 
-  public Entity copyEntityShallowRekursive(final Entity entity) {
-    if (!copiedEntities.containsKey(entity)) {
-      final Entity copiedEntity = new EntityImpl();
-      copiedEntity.getProperties().addAll(entity.getProperties());
-      copiedEntity.getAnnotations().addAll(entity.getAnnotations());
-      copiedEntity.getAssociationLinks().addAll(entity.getAssociationLinks());
-      copiedEntity.setEditLink(entity.getEditLink());
-      copiedEntity.setId(entity.getId());
-      copiedEntity.setMediaContentSource(entity.getMediaContentSource());
-      copiedEntity.setMediaContentType(entity.getMediaContentType());
-      copiedEntity.setMediaETag(entity.getMediaETag());
-      copiedEntity.getOperations().addAll(entity.getOperations());
-      copiedEntity.setSelfLink(entity.getSelfLink());
-      copiedEntity.setType(entity.getType());
-      copiedEntity.getNavigationBindings().addAll(entity.getNavigationBindings());
-
-      copiedEntities.put(entity, copiedEntity);
-      copiedEntities.put(copiedEntity, copiedEntity);
-
-      // The system query options change the amount and sequence of inline entities (feeds)
-      // So we have to make a shallow copy of all navigation link lists
-      // Make sure, that each entity is only copied once.
-      // Otherwise an infinite loop can occur caused by cyclic navigation relationships.
+    final Entity newEntity = newEntity(entity);
 
+    if (hasExpandItems(expand)) {
+      final boolean expandAll = expandAll(expand);
+      final Set<String> expanded = expandAll ? null : getExpandedPropertyNames(expand.getExpandItems());
+      final EdmEntityType edmType = edmEntitySet.getEntityType();
+      
       for (final Link link : entity.getNavigationLinks()) {
-        final Link newLink = new LinkImpl();
-        newLink.setMediaETag(link.getMediaETag());
-        newLink.setTitle(link.getTitle());
-        newLink.setType(link.getType());
-        newLink.setRel(link.getRel());
-
-        final EntitySet inlineEntitySet = link.getInlineEntitySet();
-        if (inlineEntitySet != null) {
-          newLink.setInlineEntitySet(copyEntitySetShallowRekursive(inlineEntitySet));
-        } else if (link.getInlineEntity() != null) {
-          newLink.setInlineEntity(copyEntityShallowRekursive(link.getInlineEntity()));
+        final String propertyName = link.getTitle();
+        
+        if (expandAll || expanded.contains(propertyName)) {
+          final EdmNavigationProperty edmNavigationProperty = edmType.getNavigationProperty(propertyName);
+          final EdmBindingTarget edmBindingTarget = edmEntitySet.getRelatedBindingTarget(propertyName);
+          final Link newLink = newLink(link);
+          newEntity.getNavigationLinks().add(newLink);
+          final ExpandOption innerExpandOption = getInnerExpandOption(expand, propertyName);
+          
+          if(edmNavigationProperty.isCollection()) {
+            newLink.setInlineEntitySet(transformEntitySetGraphToTree(link.getInlineEntitySet(), 
+                                                                     edmBindingTarget, 
+                                                                     innerExpandOption));
+          } else {
+            newLink.setInlineEntity(transformEntityGraphToTree(link.getInlineEntity(), 
+                                                               edmBindingTarget, 
+                                                               innerExpandOption));  
+          }
         }
-        copiedEntity.getNavigationLinks().add(newLink);
       }
+      
+    }
+    return newEntity;
+  }
+  
+  public EntitySet newEntitySet(final EntitySet entitySet) {
+    final EntitySet newEntitySet = new EntitySetImpl();
+    newEntitySet.setCount(entitySet.getCount());
+    newEntitySet.setDeltaLink(entitySet.getDeltaLink());
+    newEntitySet.setNext(entitySet.getNext());
+    
+    return newEntitySet;
+  }
+  
+  private Entity newEntity(final Entity entity) {
+    final Entity newEntity = new EntityImpl();
+    
+    newEntity.getProperties().addAll(entity.getProperties());
+    newEntity.getAnnotations().addAll(entity.getAnnotations());
+    newEntity.getAssociationLinks().addAll(entity.getAssociationLinks());
+    newEntity.setEditLink(entity.getEditLink());
+    newEntity.setId(entity.getId());
+    newEntity.setMediaContentSource(entity.getMediaContentSource());
+    newEntity.setMediaContentType(entity.getMediaContentType());
+    newEntity.setMediaETag(entity.getMediaETag());
+    newEntity.getOperations().addAll(entity.getOperations());
+    newEntity.setSelfLink(entity.getSelfLink());
+    newEntity.setType(entity.getType());
+    newEntity.getNavigationBindings().addAll(entity.getNavigationBindings());
+    
+    return newEntity;
+  }
+  
+  private Link newLink(Link link) {
+    final Link newLink = new LinkImpl();
+    newLink.setMediaETag(link.getMediaETag());
+    newLink.setTitle(link.getTitle());
+    newLink.setType(link.getType());
+    newLink.setRel(link.getRel());
+    
+    return newLink;
+  }
+  
+  private boolean hasExpandItems(ExpandOption expand) {
+    return expand != null && expand.getExpandItems() != null && !expand.getExpandItems().isEmpty();
+  }
+  
+  private boolean expandAll(ExpandOption expand) {
+    for (final ExpandItem item : expand.getExpandItems()) {
+      if (item.isStar()) {
+        return true;
+      }
+    }
+    return false;
+  }
+  
+  private Set<String> getExpandedPropertyNames(List<ExpandItem> expandItems) throws ODataApplicationException {
+    Set<String> expanded = new HashSet<String>();
+    for (final ExpandItem item : expandItems) {
+      final List<UriResource> resourceParts = item.getResourcePath().getUriResourceParts();
+      if (resourceParts.size() == 1) {
+        final UriResource resource = resourceParts.get(0);
+        if (resource instanceof UriResourceNavigation) {
+          expanded.add(((UriResourceNavigation) resource).getProperty().getName());
+        }
+      } else {
+        throw new ODataApplicationException("Expand is not supported within complex properties.",
+            HttpStatusCode.NOT_IMPLEMENTED.getStatusCode(), Locale.ROOT);
+      }
+    }
+    return expanded;
+  }
 
-      return copiedEntity;
+  private ExpandOption getInnerExpandOption(final ExpandOption expand, final String propertyName) {
+    for(final ExpandItem item : expand.getExpandItems()) {
+      final UriResource resource = item.getResourcePath().getUriResourceParts().get(0);
+      if(resource instanceof UriResourceNavigation 
+          && propertyName.equals(((UriResourceNavigation) resource).getProperty().getName())) {
+        return item.getExpandOption();
+      }
     }
-    return copiedEntities.get(entity);
+    
+    return null;
   }
 }

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/518a3a41/lib/server-tecsvc/src/main/java/org/apache/olingo/server/tecsvc/processor/queryoptions/expression/ExpressionVisitorImpl.java
----------------------------------------------------------------------
diff --git a/lib/server-tecsvc/src/main/java/org/apache/olingo/server/tecsvc/processor/queryoptions/expression/ExpressionVisitorImpl.java b/lib/server-tecsvc/src/main/java/org/apache/olingo/server/tecsvc/processor/queryoptions/expression/ExpressionVisitorImpl.java
index 3a91f49..ab0eca3 100644
--- a/lib/server-tecsvc/src/main/java/org/apache/olingo/server/tecsvc/processor/queryoptions/expression/ExpressionVisitorImpl.java
+++ b/lib/server-tecsvc/src/main/java/org/apache/olingo/server/tecsvc/processor/queryoptions/expression/ExpressionVisitorImpl.java
@@ -23,8 +23,8 @@ import java.util.Locale;
 
 import org.apache.olingo.commons.api.data.Entity;
 import org.apache.olingo.commons.api.data.Property;
+import org.apache.olingo.commons.api.edm.EdmBindingTarget;
 import org.apache.olingo.commons.api.edm.EdmComplexType;
-import org.apache.olingo.commons.api.edm.EdmEntitySet;
 import org.apache.olingo.commons.api.edm.EdmEnumType;
 import org.apache.olingo.commons.api.edm.EdmProperty;
 import org.apache.olingo.commons.api.edm.EdmType;
@@ -49,11 +49,11 @@ import org.apache.olingo.server.tecsvc.processor.queryoptions.expression.operati
 public class ExpressionVisitorImpl implements ExpressionVisitor<VisitorOperand> {
 
   final private Entity entity;
-  final private EdmEntitySet edmEntitySet;
+  final private EdmBindingTarget bindingTarget;
 
-  public ExpressionVisitorImpl(Entity entity, EdmEntitySet edmEntitySet) {
+  public ExpressionVisitorImpl(Entity entity, EdmBindingTarget bindingTarget) {
     this.entity = entity;
-    this.edmEntitySet = edmEntitySet;
+    this.bindingTarget = bindingTarget;
   }
 
   @Override
@@ -183,7 +183,7 @@ public class ExpressionVisitorImpl implements ExpressionVisitor<VisitorOperand>
     Property currentProperty = entity.getProperty(uriResourceParts.get(0).toString());
     EdmType currentType = ((UriResourcePartTyped) uriResourceParts.get(0)).getType();
 
-    EdmProperty currentEdmProperty = edmEntitySet.getEntityType()
+    EdmProperty currentEdmProperty = bindingTarget.getEntityType()
         .getStructuralProperty(uriResourceParts.get(0).toString());
 
     for (int i = 1; i < uriResourceParts.size(); i++) {

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/518a3a41/lib/server-tecsvc/src/main/java/org/apache/olingo/server/tecsvc/processor/queryoptions/options/FilterHandler.java
----------------------------------------------------------------------
diff --git a/lib/server-tecsvc/src/main/java/org/apache/olingo/server/tecsvc/processor/queryoptions/options/FilterHandler.java b/lib/server-tecsvc/src/main/java/org/apache/olingo/server/tecsvc/processor/queryoptions/options/FilterHandler.java
index f1ba4ee..d4068a1 100644
--- a/lib/server-tecsvc/src/main/java/org/apache/olingo/server/tecsvc/processor/queryoptions/options/FilterHandler.java
+++ b/lib/server-tecsvc/src/main/java/org/apache/olingo/server/tecsvc/processor/queryoptions/options/FilterHandler.java
@@ -23,7 +23,7 @@ import java.util.Locale;
 
 import org.apache.olingo.commons.api.data.Entity;
 import org.apache.olingo.commons.api.data.EntitySet;
-import org.apache.olingo.commons.api.edm.EdmEntitySet;
+import org.apache.olingo.commons.api.edm.EdmBindingTarget;
 import org.apache.olingo.commons.api.http.HttpStatusCode;
 import org.apache.olingo.commons.core.edm.primitivetype.EdmBoolean;
 import org.apache.olingo.server.api.ODataApplicationException;
@@ -53,8 +53,8 @@ import org.apache.olingo.server.tecsvc.processor.queryoptions.expression.operand
 
 public class FilterHandler {
 
-  public static void applyFilterSystemQuery(FilterOption filterOption, EntitySet entitySet, EdmEntitySet edmEntitySet)
-      throws ODataApplicationException {
+  public static void applyFilterSystemQuery(FilterOption filterOption, EntitySet entitySet, 
+      EdmBindingTarget edmEntitySet) throws ODataApplicationException {
 
     if (filterOption == null) {
       return;

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/518a3a41/lib/server-tecsvc/src/main/java/org/apache/olingo/server/tecsvc/processor/queryoptions/options/OrderByHandler.java
----------------------------------------------------------------------
diff --git a/lib/server-tecsvc/src/main/java/org/apache/olingo/server/tecsvc/processor/queryoptions/options/OrderByHandler.java b/lib/server-tecsvc/src/main/java/org/apache/olingo/server/tecsvc/processor/queryoptions/options/OrderByHandler.java
index 71b9a81..d166c4e 100644
--- a/lib/server-tecsvc/src/main/java/org/apache/olingo/server/tecsvc/processor/queryoptions/options/OrderByHandler.java
+++ b/lib/server-tecsvc/src/main/java/org/apache/olingo/server/tecsvc/processor/queryoptions/options/OrderByHandler.java
@@ -24,7 +24,7 @@ import java.util.Locale;
 
 import org.apache.olingo.commons.api.data.Entity;
 import org.apache.olingo.commons.api.data.EntitySet;
-import org.apache.olingo.commons.api.edm.EdmEntitySet;
+import org.apache.olingo.commons.api.edm.EdmBindingTarget;
 import org.apache.olingo.commons.api.http.HttpStatusCode;
 import org.apache.olingo.server.api.ODataApplicationException;
 import org.apache.olingo.server.api.uri.queryoption.OrderByItem;
@@ -35,14 +35,14 @@ import org.apache.olingo.server.tecsvc.processor.queryoptions.expression.operand
 
 public class OrderByHandler {
   public static void applyOrderByOption(final OrderByOption orderByOption, final EntitySet entitySet,
-      final EdmEntitySet edmEntitySet) throws ODataApplicationException {
+      final EdmBindingTarget edmBindingTarget) throws ODataApplicationException {
 
     if (orderByOption == null) {
       return;
     }
 
     try {
-      applyOrderByOptionInternal(orderByOption, entitySet, edmEntitySet);
+      applyOrderByOptionInternal(orderByOption, entitySet, edmBindingTarget);
     } catch (SystemQueryOptionsRuntimeException e) {
       if (e.getCause() instanceof ODataApplicationException) {
         // Throw the nested exception, to send the correct HTTP status code in the HTTP response
@@ -55,7 +55,7 @@ public class OrderByHandler {
   }
 
   private static void applyOrderByOptionInternal(final OrderByOption orderByOption, final EntitySet entitySet,
-      final EdmEntitySet edmEntitySet) throws ODataApplicationException {
+      final EdmBindingTarget edmBindingTarget) throws ODataApplicationException {
     Collections.sort(entitySet.getEntities(), new Comparator<Entity>() {
       @Override
       @SuppressWarnings({ "unchecked", "rawtypes" })
@@ -69,9 +69,9 @@ public class OrderByHandler {
           try {
             final OrderByItem item = orderByOption.getOrders().get(i);
             final TypedOperand op1 =
-                item.getExpression().accept(new ExpressionVisitorImpl(e1, edmEntitySet)).asTypedOperand();
+                item.getExpression().accept(new ExpressionVisitorImpl(e1, edmBindingTarget)).asTypedOperand();
             final TypedOperand op2 =
-                item.getExpression().accept(new ExpressionVisitorImpl(e2, edmEntitySet)).asTypedOperand();
+                item.getExpression().accept(new ExpressionVisitorImpl(e2, edmBindingTarget)).asTypedOperand();
 
             if (op1.isNull() || op2.isNull()) {
               if (op1.isNull() && op2.isNull()) {