You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@olingo.apache.org by ch...@apache.org on 2015/10/21 10:09:57 UTC

[5/7] olingo-odata4 git commit: [OLINGO-713] Added Media Entities tutorial

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/16f5c55d/samples/tutorials/p10_media/src/main/java/myservice/mynamespace/service/DemoPrimitiveProcessor.java
----------------------------------------------------------------------
diff --git a/samples/tutorials/p10_media/src/main/java/myservice/mynamespace/service/DemoPrimitiveProcessor.java b/samples/tutorials/p10_media/src/main/java/myservice/mynamespace/service/DemoPrimitiveProcessor.java
new file mode 100644
index 0000000..8766b8d
--- /dev/null
+++ b/samples/tutorials/p10_media/src/main/java/myservice/mynamespace/service/DemoPrimitiveProcessor.java
@@ -0,0 +1,146 @@
+/*
+ * 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 myservice.mynamespace.service;
+
+import java.util.List;
+import java.util.Locale;
+
+import myservice.mynamespace.data.Storage;
+
+import org.apache.olingo.commons.api.data.ContextURL;
+import org.apache.olingo.commons.api.data.Entity;
+import org.apache.olingo.commons.api.data.Property;
+import org.apache.olingo.commons.api.edm.EdmEntitySet;
+import org.apache.olingo.commons.api.edm.EdmPrimitiveType;
+import org.apache.olingo.commons.api.edm.EdmProperty;
+import org.apache.olingo.commons.api.format.ContentType;
+import org.apache.olingo.commons.api.http.HttpHeader;
+import org.apache.olingo.commons.api.http.HttpStatusCode;
+import org.apache.olingo.server.api.OData;
+import org.apache.olingo.server.api.ODataApplicationException;
+import org.apache.olingo.server.api.ODataRequest;
+import org.apache.olingo.server.api.ODataResponse;
+import org.apache.olingo.server.api.ServiceMetadata;
+import org.apache.olingo.server.api.deserializer.DeserializerException;
+import org.apache.olingo.server.api.processor.PrimitiveProcessor;
+import org.apache.olingo.server.api.serializer.ODataSerializer;
+import org.apache.olingo.server.api.serializer.PrimitiveSerializerOptions;
+import org.apache.olingo.server.api.serializer.SerializerException;
+import org.apache.olingo.server.api.serializer.SerializerResult;
+import org.apache.olingo.server.api.uri.UriInfo;
+import org.apache.olingo.server.api.uri.UriParameter;
+import org.apache.olingo.server.api.uri.UriResource;
+import org.apache.olingo.server.api.uri.UriResourceEntitySet;
+import org.apache.olingo.server.api.uri.UriResourceProperty;
+
+public class DemoPrimitiveProcessor implements PrimitiveProcessor {
+
+	private OData odata;
+	private Storage storage;
+  private ServiceMetadata serviceMetadata;
+
+	public DemoPrimitiveProcessor(Storage storage) {
+		this.storage = storage;
+	}
+
+	public void init(OData odata, ServiceMetadata serviceMetadata) {
+		this.odata = odata;
+    this.serviceMetadata = serviceMetadata;
+	}
+	
+	/*
+	 * In our example, the URL would be: http://localhost:8080/DemoService/DemoService.svc/Products(1)/Name
+	 * and the response:
+	 * {
+	 *	  @odata.context: "$metadata#Products/Name",
+	 *	  value: "Notebook Basic 15"
+	 * }
+	 * */
+	public void readPrimitive(ODataRequest request, ODataResponse response, 
+								UriInfo uriInfo, ContentType responseFormat) 
+								throws ODataApplicationException, SerializerException {
+
+		// 1. Retrieve info from URI
+		// 1.1. retrieve the info about the requested entity set 
+		List<UriResource> resourceParts = uriInfo.getUriResourceParts();
+		// Note: only in our example we can rely that the first segment is the EntitySet
+		UriResourceEntitySet uriEntityset = (UriResourceEntitySet) resourceParts.get(0); 
+		EdmEntitySet edmEntitySet = uriEntityset.getEntitySet();
+		// the key for the entity
+		List<UriParameter> keyPredicates = uriEntityset.getKeyPredicates();
+		
+		// 1.2. retrieve the requested (Edm) property 
+		UriResourceProperty uriProperty = (UriResourceProperty)resourceParts.get(resourceParts.size() -1); // the last segment is the Property
+		EdmProperty edmProperty = uriProperty.getProperty();
+		String edmPropertyName = edmProperty.getName();
+		// in our example, we know we have only primitive types in our model
+		EdmPrimitiveType edmPropertyType = (EdmPrimitiveType) edmProperty.getType(); 
+		
+		
+		// 2. retrieve data from backend
+		// 2.1. retrieve the entity data, for which the property has to be read
+		Entity entity = storage.readEntityData(edmEntitySet, keyPredicates);
+		if (entity == null) { // Bad request
+			throw new ODataApplicationException("Entity not found",
+							HttpStatusCode.NOT_FOUND.getStatusCode(), Locale.ENGLISH);
+		} 
+		
+		// 2.2. retrieve the property data from the entity
+		Property property = entity.getProperty(edmPropertyName);
+		if (property == null) {
+			throw new ODataApplicationException("Property not found",
+              HttpStatusCode.NOT_FOUND.getStatusCode(), Locale.ENGLISH);
+		}		
+		
+		// 3. serialize
+		Object value = property.getValue();
+		if (value != null) {
+			// 3.1. configure the serializer
+			ODataSerializer serializer = odata.createSerializer(responseFormat);
+			
+			ContextURL contextUrl = ContextURL.with().entitySet(edmEntitySet).navOrPropertyPath(edmPropertyName).build();
+			PrimitiveSerializerOptions options = PrimitiveSerializerOptions.with().contextURL(contextUrl).build();
+			// 3.2. serialize
+			SerializerResult result = serializer.primitive(serviceMetadata, edmPropertyType, property, options);
+			
+			//4. configure the response object
+			response.setContent(result.getContent());
+			response.setStatusCode(HttpStatusCode.OK.getStatusCode());
+			response.setHeader(HttpHeader.CONTENT_TYPE, responseFormat.toContentTypeString());		
+		}else{
+			// in case there's no value for the property, we can skip the serialization
+			response.setStatusCode(HttpStatusCode.NO_CONTENT.getStatusCode());
+		}
+	}
+
+	/*
+	 * These processor methods are not handled in this tutorial 
+	 *
+	 * */
+	public void updatePrimitive(ODataRequest request, ODataResponse response, UriInfo uriInfo,
+                              ContentType requestFormat, ContentType responseFormat)
+								throws ODataApplicationException, DeserializerException, SerializerException {
+		throw new ODataApplicationException("Not supported.", HttpStatusCode.NOT_IMPLEMENTED.getStatusCode(), Locale.ROOT);
+	}
+
+	public void deletePrimitive(ODataRequest request, ODataResponse response, UriInfo uriInfo)
+          throws ODataApplicationException {
+		throw new ODataApplicationException("Not supported.", HttpStatusCode.NOT_IMPLEMENTED.getStatusCode(), Locale.ROOT);
+	}
+}

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/16f5c55d/samples/tutorials/p10_media/src/main/java/myservice/mynamespace/util/Util.java
----------------------------------------------------------------------
diff --git a/samples/tutorials/p10_media/src/main/java/myservice/mynamespace/util/Util.java b/samples/tutorials/p10_media/src/main/java/myservice/mynamespace/util/Util.java
new file mode 100644
index 0000000..97e8eff
--- /dev/null
+++ b/samples/tutorials/p10_media/src/main/java/myservice/mynamespace/util/Util.java
@@ -0,0 +1,161 @@
+/*
+ * 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 myservice.mynamespace.util;
+
+import java.util.List;
+import java.util.Locale;
+
+import org.apache.olingo.commons.api.data.Entity;
+import org.apache.olingo.commons.api.data.EntityCollection;
+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.edm.EdmPrimitiveType;
+import org.apache.olingo.commons.api.edm.EdmPrimitiveTypeException;
+import org.apache.olingo.commons.api.edm.EdmProperty;
+import org.apache.olingo.commons.api.edm.EdmType;
+import org.apache.olingo.commons.api.http.HttpStatusCode;
+import org.apache.olingo.server.api.ODataApplicationException;
+import org.apache.olingo.server.api.uri.UriInfoResource;
+import org.apache.olingo.server.api.uri.UriParameter;
+import org.apache.olingo.server.api.uri.UriResource;
+import org.apache.olingo.server.api.uri.UriResourceEntitySet;
+
+public class Util {
+  
+  public static EdmEntitySet getEdmEntitySet(UriInfoResource uriInfo) throws ODataApplicationException {
+
+    List<UriResource> resourcePaths = uriInfo.getUriResourceParts();
+    // To get the entity set we have to interpret all URI segments
+    if (!(resourcePaths.get(0) instanceof UriResourceEntitySet)) {
+      // Here we should interpret the whole URI but in this example we do not support navigation so we throw an
+      // exception
+      throw new ODataApplicationException("Invalid resource type for first segment.", HttpStatusCode.NOT_IMPLEMENTED
+          .getStatusCode(), Locale.ENGLISH);
+    }
+
+    UriResourceEntitySet uriResource = (UriResourceEntitySet) resourcePaths.get(0);
+
+    return uriResource.getEntitySet();
+  }
+  
+  public static Entity findEntity(EdmEntityType edmEntityType, EntityCollection entitySet,
+      List<UriParameter> keyParams) throws ODataApplicationException {
+
+    List<Entity> entityList = entitySet.getEntities();
+
+    // loop over all entities in order to find that one that matches
+    // all keys in request e.g. contacts(ContactID=1, CompanyID=1)
+    for (Entity entity : entityList) {
+      boolean foundEntity = entityMatchesAllKeys(edmEntityType, entity, keyParams);
+      if (foundEntity) {
+        return entity;
+      }
+    }
+
+    return null;
+  }
+
+  public static boolean entityMatchesAllKeys(EdmEntityType edmEntityType, Entity entity, List<UriParameter> keyParams) 
+      throws ODataApplicationException {
+
+    // loop over all keys
+    for (final UriParameter key : keyParams) {
+      // key
+      String keyName = key.getName();
+      String keyText = key.getText();
+      
+      // Edm: we need this info for the comparison below
+      EdmProperty edmKeyProperty = (EdmProperty) edmEntityType.getProperty(keyName);
+      Boolean isNullable = edmKeyProperty.isNullable();
+      Integer maxLength = edmKeyProperty.getMaxLength();
+      Integer precision = edmKeyProperty.getPrecision();
+      Boolean isUnicode = edmKeyProperty.isUnicode();
+      Integer scale = edmKeyProperty.getScale();
+      // get the EdmType in order to compare
+      EdmType edmType = edmKeyProperty.getType();
+      EdmPrimitiveType edmPrimitiveType = (EdmPrimitiveType) edmType;
+
+      // Runtime data: the value of the current entity
+      // don't need to check for null, this is done in olingo library
+      Object valueObject = entity.getProperty(keyName).getValue();
+
+      // now need to compare the valueObject with the keyText String
+      // this is done using the type.valueToString //
+      String valueAsString = null;
+      try {
+        valueAsString = edmPrimitiveType.valueToString(valueObject, isNullable, maxLength, precision, scale, isUnicode);
+      } catch (EdmPrimitiveTypeException e) {
+        throw new ODataApplicationException("Failed to retrieve String value", HttpStatusCode.INTERNAL_SERVER_ERROR
+            .getStatusCode(), Locale.ENGLISH, e);
+      }
+
+      if (valueAsString == null) {
+        return false;
+      }
+
+      boolean matches = valueAsString.equals(keyText);
+      if (!matches) {
+        // if any of the key properties is not found in the entity, we don't need to search further
+        return false;
+      }
+    }
+
+    return true;
+  }
+  
+  /**
+   * Example:
+   * For the following navigation: DemoService.svc/Categories(1)/Products
+   * we need the EdmEntitySet for the navigation property "Products"
+   *
+   * This is defined as follows in the metadata:
+   * <code>
+   * 
+   * <EntitySet Name="Categories" EntityType="OData.Demo.Category">
+   * <NavigationPropertyBinding Path="Products" Target="Products"/>
+   * </EntitySet>
+   * </code>
+   * The "Target" attribute specifies the target EntitySet
+   * Therefore we need the startEntitySet "Categories" in order to retrieve the target EntitySet "Products"
+   */
+  public static EdmEntitySet getNavigationTargetEntitySet(EdmEntitySet startEdmEntitySet,
+      EdmNavigationProperty edmNavigationProperty)
+      throws ODataApplicationException {
+
+    EdmEntitySet navigationTargetEntitySet = null;
+
+    String navPropName = edmNavigationProperty.getName();
+    EdmBindingTarget edmBindingTarget = startEdmEntitySet.getRelatedBindingTarget(navPropName);
+    if (edmBindingTarget == null) {
+      throw new ODataApplicationException("Not supported.",
+              HttpStatusCode.NOT_IMPLEMENTED.getStatusCode(), Locale.ROOT);
+    }
+
+    if (edmBindingTarget instanceof EdmEntitySet) {
+      navigationTargetEntitySet = (EdmEntitySet) edmBindingTarget;
+    } else {
+      throw new ODataApplicationException("Not supported.",
+              HttpStatusCode.NOT_IMPLEMENTED.getStatusCode(), Locale.ROOT);
+    }
+
+    return navigationTargetEntitySet;
+  }
+}

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/16f5c55d/samples/tutorials/p10_media/src/main/java/myservice/mynamespace/web/DemoServlet.java
----------------------------------------------------------------------
diff --git a/samples/tutorials/p10_media/src/main/java/myservice/mynamespace/web/DemoServlet.java b/samples/tutorials/p10_media/src/main/java/myservice/mynamespace/web/DemoServlet.java
new file mode 100644
index 0000000..3040f0e
--- /dev/null
+++ b/samples/tutorials/p10_media/src/main/java/myservice/mynamespace/web/DemoServlet.java
@@ -0,0 +1,73 @@
+/*
+ * 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 myservice.mynamespace.web;
+
+import java.io.IOException;
+import java.util.ArrayList;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import javax.servlet.http.HttpSession;
+
+import org.apache.olingo.server.api.OData;
+import org.apache.olingo.server.api.ODataHttpHandler;
+import org.apache.olingo.server.api.ServiceMetadata;
+import org.apache.olingo.server.api.edmx.EdmxReference;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import myservice.mynamespace.data.Storage;
+import myservice.mynamespace.service.DemoEdmProvider;
+import myservice.mynamespace.service.DemoEntityCollectionProcessor;
+import myservice.mynamespace.service.DemoEntityProcessor;
+import myservice.mynamespace.service.DemoPrimitiveProcessor;
+
+public class DemoServlet extends HttpServlet {
+
+  private static final long serialVersionUID = 1L;
+  private static final Logger LOG = LoggerFactory.getLogger(DemoServlet.class);
+
+  @Override
+  protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+    try {
+      HttpSession session = req.getSession(true);
+      Storage storage = (Storage) session.getAttribute(Storage.class.getName());
+      if (storage == null) {
+        storage = new Storage();
+        session.setAttribute(Storage.class.getName(), storage);
+      }
+
+      // create odata handler and configure it with EdmProvider and Processor
+      OData odata = OData.newInstance();
+      ServiceMetadata edm = odata.createServiceMetadata(new DemoEdmProvider(), new ArrayList<EdmxReference>());
+      ODataHttpHandler handler = odata.createHandler(edm);
+      handler.register(new DemoEntityCollectionProcessor(storage));
+      handler.register(new DemoEntityProcessor(storage));
+      handler.register(new DemoPrimitiveProcessor(storage));
+      
+      // let the handler do the work
+      handler.process(req, resp);
+    } catch (RuntimeException e) {
+      LOG.error("Server Error occurred in ExampleServlet", e);
+      throw new ServletException(e);
+    }
+  }
+}

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/16f5c55d/samples/tutorials/p10_media/src/main/webapp/WEB-INF/web.xml
----------------------------------------------------------------------
diff --git a/samples/tutorials/p10_media/src/main/webapp/WEB-INF/web.xml b/samples/tutorials/p10_media/src/main/webapp/WEB-INF/web.xml
new file mode 100644
index 0000000..21de52a
--- /dev/null
+++ b/samples/tutorials/p10_media/src/main/webapp/WEB-INF/web.xml
@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  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.
+-->
+<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
+    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
+				 id="WebApp_ID" version="2.5">
+
+	<!-- Register the HttpServlet implementation -->
+	<servlet>
+	  <servlet-name>DemoServlet</servlet-name>
+	  <servlet-class>myservice.mynamespace.web.DemoServlet</servlet-class>
+	  <load-on-startup>1</load-on-startup>
+	</servlet>
+	
+	<!-- 
+		Our OData service can be invoked at 
+		http://localhost:8080/DemoService/DemoService.svc
+	-->
+	<servlet-mapping>
+	  <servlet-name>DemoServlet</servlet-name>
+	  <url-pattern>/DemoService.svc/*</url-pattern>
+	</servlet-mapping>
+</web-app>
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/16f5c55d/samples/tutorials/p10_media/src/main/webapp/index.jsp
----------------------------------------------------------------------
diff --git a/samples/tutorials/p10_media/src/main/webapp/index.jsp b/samples/tutorials/p10_media/src/main/webapp/index.jsp
new file mode 100644
index 0000000..7ffb4ba
--- /dev/null
+++ b/samples/tutorials/p10_media/src/main/webapp/index.jsp
@@ -0,0 +1,26 @@
+<!--
+
+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.
+
+-->
+<html>
+<body>
+<h2>Hello World!</h2>
+<a href="DemoService.svc/">OData Olingo V4 Demo Service</a>
+</body>
+</html>

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/16f5c55d/samples/tutorials/p9_action/src/main/java/myservice/mynamespace/data/Storage.java
----------------------------------------------------------------------
diff --git a/samples/tutorials/p9_action/src/main/java/myservice/mynamespace/data/Storage.java b/samples/tutorials/p9_action/src/main/java/myservice/mynamespace/data/Storage.java
index 262a0f9..12b373f 100644
--- a/samples/tutorials/p9_action/src/main/java/myservice/mynamespace/data/Storage.java
+++ b/samples/tutorials/p9_action/src/main/java/myservice/mynamespace/data/Storage.java
@@ -143,9 +143,9 @@ public class Storage {
 
     EdmEntityType edmEntityType = edmEntitySet.getEntityType();
 
-    if (edmEntityType.getName().equals(DemoEdmProvider.ET_PRODUCT_NAME)) {
+    if (edmEntitySet.getName().equals(DemoEdmProvider.ES_PRODUCTS_NAME)) {
       return getEntity(edmEntityType, keyParams, productList);
-    } else if(edmEntityType.getName().equals(DemoEdmProvider.ET_CATEGORY_NAME)) {
+    } else if(edmEntitySet.getName().equals(DemoEdmProvider.ES_CATEGORIES_NAME)) {
       return getEntity(edmEntityType, keyParams, categoryList);
     }
 
@@ -156,9 +156,9 @@ public class Storage {
 
     EdmEntityType edmEntityType = edmEntitySet.getEntityType();
 
-    if (edmEntityType.getName().equals(DemoEdmProvider.ET_PRODUCT_NAME)) {
+    if (edmEntitySet.getName().equals(DemoEdmProvider.ES_PRODUCTS_NAME)) {
       return createEntity(edmEntityType, entityToCreate, productList);
-    } else if(edmEntityType.getName().equals(DemoEdmProvider.ET_CATEGORY_NAME)) {
+    } else if(edmEntitySet.getName().equals(DemoEdmProvider.ES_CATEGORIES_NAME)) {
       return createEntity(edmEntityType, entityToCreate, categoryList);
     }
 
@@ -173,9 +173,9 @@ public class Storage {
 
     EdmEntityType edmEntityType = edmEntitySet.getEntityType();
 
-    if (edmEntityType.getName().equals(DemoEdmProvider.ET_PRODUCT_NAME)) {
+    if (edmEntitySet.getName().equals(DemoEdmProvider.ES_PRODUCTS_NAME)) {
       updateEntity(edmEntityType, keyParams, updateEntity, httpMethod, productList);
-    } else if(edmEntityType.getName().equals(DemoEdmProvider.ET_CATEGORY_NAME)) {
+    } else if(edmEntitySet.getName().equals(DemoEdmProvider.ES_CATEGORIES_NAME)) {
       updateEntity(edmEntityType, keyParams, updateEntity, httpMethod, categoryList);
     }
   }
@@ -185,9 +185,9 @@ public class Storage {
 
     EdmEntityType edmEntityType = edmEntitySet.getEntityType();
 
-    if (edmEntityType.getName().equals(DemoEdmProvider.ET_PRODUCT_NAME)) {
+    if (edmEntitySet.getName().equals(DemoEdmProvider.ES_PRODUCTS_NAME)) {
       deleteEntity(edmEntityType, keyParams, productList);
-    } else if(edmEntityType.getName().equals(DemoEdmProvider.ET_CATEGORY_NAME)) {
+    } else if(edmEntitySet.getName().equals(DemoEdmProvider.ES_CATEGORIES_NAME)) {
       deleteEntity(edmEntityType, keyParams, categoryList);
     }
   }

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/16f5c55d/samples/tutorials/p9_action_preparation/src/main/java/myservice/mynamespace/data/Storage.java
----------------------------------------------------------------------
diff --git a/samples/tutorials/p9_action_preparation/src/main/java/myservice/mynamespace/data/Storage.java b/samples/tutorials/p9_action_preparation/src/main/java/myservice/mynamespace/data/Storage.java
index d75a7d2..c4bdee0 100644
--- a/samples/tutorials/p9_action_preparation/src/main/java/myservice/mynamespace/data/Storage.java
+++ b/samples/tutorials/p9_action_preparation/src/main/java/myservice/mynamespace/data/Storage.java
@@ -73,9 +73,9 @@ public class Storage {
 
     EdmEntityType edmEntityType = edmEntitySet.getEntityType();
 
-    if (edmEntityType.getName().equals(DemoEdmProvider.ET_PRODUCT_NAME)) {
+    if (edmEntitySet.getName().equals(DemoEdmProvider.ES_PRODUCTS_NAME)) {
       return getEntity(edmEntityType, keyParams, productList);
-    } else if(edmEntityType.getName().equals(DemoEdmProvider.ET_CATEGORY_NAME)) {
+    } else if(edmEntitySet.getName().equals(DemoEdmProvider.ES_CATEGORIES_NAME)) {
       return getEntity(edmEntityType, keyParams, categoryList);
     }
 
@@ -86,9 +86,9 @@ public class Storage {
 
     EdmEntityType edmEntityType = edmEntitySet.getEntityType();
 
-    if (edmEntityType.getName().equals(DemoEdmProvider.ET_PRODUCT_NAME)) {
+    if (edmEntitySet.getName().equals(DemoEdmProvider.ES_PRODUCTS_NAME)) {
       return createEntity(edmEntityType, entityToCreate, productList);
-    } else if(edmEntityType.getName().equals(DemoEdmProvider.ET_CATEGORY_NAME)) {
+    } else if(edmEntitySet.getName().equals(DemoEdmProvider.ES_CATEGORIES_NAME)) {
       return createEntity(edmEntityType, entityToCreate, categoryList);
     }
 
@@ -103,9 +103,9 @@ public class Storage {
 
     EdmEntityType edmEntityType = edmEntitySet.getEntityType();
 
-    if (edmEntityType.getName().equals(DemoEdmProvider.ET_PRODUCT_NAME)) {
+    if (edmEntitySet.getName().equals(DemoEdmProvider.ES_PRODUCTS_NAME)) {
       updateEntity(edmEntityType, keyParams, updateEntity, httpMethod, productList);
-    } else if(edmEntityType.getName().equals(DemoEdmProvider.ET_CATEGORY_NAME)) {
+    } else if(edmEntitySet.getName().equals(DemoEdmProvider.ES_CATEGORIES_NAME)) {
       updateEntity(edmEntityType, keyParams, updateEntity, httpMethod, categoryList);
     }
   }
@@ -115,9 +115,9 @@ public class Storage {
 
     EdmEntityType edmEntityType = edmEntitySet.getEntityType();
 
-    if (edmEntityType.getName().equals(DemoEdmProvider.ET_PRODUCT_NAME)) {
+    if (edmEntitySet.getName().equals(DemoEdmProvider.ES_PRODUCTS_NAME)) {
       deleteEntity(edmEntityType, keyParams, productList);
-    } else if(edmEntityType.getName().equals(DemoEdmProvider.ET_CATEGORY_NAME)) {
+    } else if(edmEntitySet.getName().equals(DemoEdmProvider.ES_CATEGORIES_NAME)) {
       deleteEntity(edmEntityType, keyParams, categoryList);
     }
   }

http://git-wip-us.apache.org/repos/asf/olingo-odata4/blob/16f5c55d/samples/tutorials/pom.xml
----------------------------------------------------------------------
diff --git a/samples/tutorials/pom.xml b/samples/tutorials/pom.xml
index 1a21e5f..792bcea 100644
--- a/samples/tutorials/pom.xml
+++ b/samples/tutorials/pom.xml
@@ -46,6 +46,7 @@
     <module>p8_queryoptions-f</module>
 	<module>p9_action</module>
 	<module>p9_action_preparation</module>
+	<module>p10_media</module>
   </modules>
 
   <build>