| /******************************************************************************* |
| * 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.odata2.core.edm.provider; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStreamWriter; |
| import java.io.UnsupportedEncodingException; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| |
| import javax.xml.stream.XMLStreamException; |
| import javax.xml.stream.XMLStreamWriter; |
| |
| import org.apache.olingo.odata2.api.ODataServiceVersion; |
| import org.apache.olingo.odata2.api.edm.EdmEntitySetInfo; |
| import org.apache.olingo.odata2.api.edm.EdmServiceMetadata; |
| import org.apache.olingo.odata2.api.edm.provider.DataServices; |
| import org.apache.olingo.odata2.api.edm.provider.EdmProvider; |
| import org.apache.olingo.odata2.api.edm.provider.EntityContainer; |
| import org.apache.olingo.odata2.api.edm.provider.EntitySet; |
| import org.apache.olingo.odata2.api.edm.provider.EntityType; |
| import org.apache.olingo.odata2.api.edm.provider.Property; |
| import org.apache.olingo.odata2.api.edm.provider.Schema; |
| import org.apache.olingo.odata2.api.ep.EntityProviderException; |
| import org.apache.olingo.odata2.api.exception.ODataException; |
| import org.apache.olingo.odata2.core.commons.XmlHelper; |
| import org.apache.olingo.odata2.core.ep.producer.XmlMetadataProducer; |
| import org.apache.olingo.odata2.core.ep.util.CircleStreamBuffer; |
| |
| /** |
| * |
| */ |
| public class EdmServiceMetadataImplProv implements EdmServiceMetadata { |
| |
| private static final String EDM_PROVIDER_EXEPTION = "EdmProvider is not set."; |
| private EdmProvider edmProvider; |
| private String dataServiceVersion; |
| private List<Schema> schemas; |
| private List<EdmEntitySetInfo> entitySetInfos; |
| |
| public EdmServiceMetadataImplProv(final EdmProvider edmProvider) { |
| this.edmProvider = edmProvider; |
| } |
| |
| @Override |
| public InputStream getMetadata() throws ODataException { |
| if(edmProvider == null){ |
| throw new ODataException(EDM_PROVIDER_EXEPTION); |
| } |
| if (schemas == null) { |
| schemas = edmProvider.getSchemas(); |
| } |
| OutputStreamWriter writer = null; |
| CircleStreamBuffer csb = new CircleStreamBuffer(); |
| EntityProviderException cachedException = null; |
| DataServices metadata = new DataServices().setSchemas(schemas).setDataServiceVersion(getDataServiceVersion()); |
| |
| try { |
| writer = new OutputStreamWriter(csb.getOutputStream(), "UTF-8"); |
| XMLStreamWriter xmlStreamWriter = XmlHelper.getXMLOutputFactory().createXMLStreamWriter(writer); |
| XmlMetadataProducer.writeMetadata(metadata, xmlStreamWriter, null); |
| return csb.getInputStream(); |
| } catch (XMLStreamException e) { |
| cachedException = new EntityProviderException(EntityProviderException.COMMON, e); |
| throw cachedException; |
| } catch (UnsupportedEncodingException e) { |
| cachedException = new EntityProviderException(EntityProviderException.COMMON, e); |
| throw cachedException; |
| } finally {// NOPMD (suppress DoNotThrowExceptionInFinally) |
| if (writer != null) { |
| try { |
| writer.close(); |
| } catch (IOException e) { |
| if (cachedException != null) { |
| throw cachedException; |
| } else { |
| throw new EntityProviderException(EntityProviderException.COMMON, e); |
| } |
| } |
| } |
| } |
| } |
| |
| @Override |
| public String getDataServiceVersion() throws ODataException { |
| if(edmProvider == null){ |
| throw new ODataException(EDM_PROVIDER_EXEPTION); |
| } |
| if (schemas == null) { |
| schemas = edmProvider.getSchemas(); |
| } |
| |
| if (dataServiceVersion == null) { |
| dataServiceVersion = ODataServiceVersion.V10; |
| |
| for (Schema schema : listOrEmptyList(schemas)) { |
| List<EntityType> entityTypes = listOrEmptyList(schema.getEntityTypes()); |
| for (EntityType entityType : entityTypes) { |
| List<Property> properties = listOrEmptyList(entityType.getProperties()); |
| for (Property property : properties) { |
| if (property.getCustomizableFeedMappings() != null) { |
| if (property.getCustomizableFeedMappings().getFcKeepInContent() != null) { |
| if (!property.getCustomizableFeedMappings().getFcKeepInContent()) { |
| dataServiceVersion = ODataServiceVersion.V20; |
| return dataServiceVersion; |
| } |
| } |
| if (entityType.getCustomizableFeedMappings() != null) { |
| if (entityType.getCustomizableFeedMappings().getFcKeepInContent() != null) { |
| if (entityType.getCustomizableFeedMappings().getFcKeepInContent()) { |
| dataServiceVersion = ODataServiceVersion.V20; |
| return dataServiceVersion; |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| return dataServiceVersion; |
| } |
| |
| @Override |
| public List<EdmEntitySetInfo> getEntitySetInfos() throws ODataException { |
| if(edmProvider == null){ |
| throw new ODataException(EDM_PROVIDER_EXEPTION); |
| } |
| if (entitySetInfos == null) { |
| entitySetInfos = new ArrayList<EdmEntitySetInfo>(); |
| |
| if (schemas == null) { |
| schemas = edmProvider.getSchemas(); |
| } |
| |
| for (Schema schema : schemas) { |
| for (EntityContainer entityContainer : listOrEmptyList(schema.getEntityContainers())) { |
| for (EntitySet entitySet : listOrEmptyList(entityContainer.getEntitySets())) { |
| EdmEntitySetInfo entitySetInfo = new EdmEntitySetInfoImplProv(entitySet, entityContainer); |
| entitySetInfos.add(entitySetInfo); |
| } |
| } |
| } |
| |
| } |
| |
| return entitySetInfos; |
| } |
| |
| /** |
| * Return original list if parameter is not NULL or an empty list. |
| * |
| * @param list list which is checked and probably returned |
| * @param <T> type of list |
| * @return original list if parameter is not NULL or an empty list |
| */ |
| private <T> List<T> listOrEmptyList(List<T> list) { |
| if(list == null) { |
| return Collections.emptyList(); |
| } |
| return list; |
| } |
| } |