| /******************************************************************************* |
| * 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.ep.consumer; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.io.UnsupportedEncodingException; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.olingo.odata2.api.edm.EdmEntitySet; |
| import org.apache.olingo.odata2.api.edm.EdmProperty; |
| import org.apache.olingo.odata2.api.ep.EntityProviderException; |
| import org.apache.olingo.odata2.api.ep.EntityProviderReadProperties; |
| import org.apache.olingo.odata2.api.ep.entry.ODataEntry; |
| import org.apache.olingo.odata2.api.ep.feed.ODataDeltaFeed; |
| import org.apache.olingo.odata2.api.ep.feed.ODataFeed; |
| import org.apache.olingo.odata2.core.ep.aggregator.EntityInfoAggregator; |
| import org.apache.olingo.odata2.core.ep.aggregator.EntityPropertyInfo; |
| |
| import com.google.gson.stream.JsonReader; |
| |
| /** |
| * |
| */ |
| public class JsonEntityConsumer { |
| |
| /** Default used charset for reader */ |
| private static final String DEFAULT_CHARSET = "UTF-8"; |
| |
| public ODataEntry readEntry(final EdmEntitySet entitySet, final InputStream content, |
| final EntityProviderReadProperties properties) throws EntityProviderException { |
| JsonReader reader = null; |
| EntityProviderException cachedException = null; |
| |
| try { |
| EntityInfoAggregator eia = EntityInfoAggregator.create(entitySet); |
| reader = createJsonReader(content); |
| |
| return new JsonEntryConsumer(reader, eia, properties).readSingleEntry(); |
| } catch (UnsupportedEncodingException e) { |
| cachedException = |
| new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass() |
| .getSimpleName()), e); |
| throw cachedException; |
| } finally {// NOPMD (suppress DoNotThrowExceptionInFinally) |
| if (reader != null) { |
| try { |
| reader.close(); |
| } catch (IOException e) { |
| if (cachedException != null) { |
| throw cachedException; |
| } else { |
| throw new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass() |
| .getSimpleName()), e); |
| } |
| } |
| } |
| } |
| } |
| |
| public ODataFeed readFeed(final EdmEntitySet entitySet, final InputStream content, |
| final EntityProviderReadProperties readProperties) throws EntityProviderException { |
| return readDeltaFeed(entitySet, content, readProperties); |
| } |
| |
| public ODataDeltaFeed readDeltaFeed(final EdmEntitySet entitySet, final InputStream content, |
| final EntityProviderReadProperties readProperties) throws EntityProviderException { |
| |
| JsonReader reader = null; |
| EntityProviderException cachedException = null; |
| |
| try { |
| EntityInfoAggregator eia = EntityInfoAggregator.create(entitySet); |
| reader = createJsonReader(content); |
| |
| JsonFeedConsumer jfc = new JsonFeedConsumer(reader, eia, readProperties); |
| ODataDeltaFeed result = jfc.readFeedStandalone(); |
| |
| return result; |
| } catch (UnsupportedEncodingException e) { |
| cachedException = |
| new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass() |
| .getSimpleName()), e); |
| throw cachedException; |
| } finally {// NOPMD (suppress DoNotThrowExceptionInFinally) |
| if (reader != null) { |
| try { |
| reader.close(); |
| } catch (IOException e) { |
| if (cachedException != null) { |
| throw cachedException; |
| } else { |
| throw new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass() |
| .getSimpleName()), e); |
| } |
| } |
| } |
| } |
| } |
| |
| |
| public Map<String, Object> readProperty(final EdmProperty edmProperty, InputStream content, |
| final EntityProviderReadProperties properties) throws EntityProviderException { |
| return readProperty(EntityInfoAggregator.create(edmProperty), content, properties); |
| } |
| |
| public Map<String, Object> readProperty(final EntityPropertyInfo propertyInfo, final InputStream content, |
| final EntityProviderReadProperties readProperties) throws EntityProviderException { |
| JsonReader reader = null; |
| EntityProviderException cachedException = null; |
| |
| try { |
| reader = createJsonReader(content); |
| return new JsonPropertyConsumer().readPropertyStandalone(reader, propertyInfo, readProperties); |
| } catch (final UnsupportedEncodingException e) { |
| cachedException = |
| new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass() |
| .getSimpleName()), e); |
| throw cachedException; |
| } finally {// NOPMD (suppress DoNotThrowExceptionInFinally) |
| if (reader != null) { |
| try { |
| reader.close(); |
| } catch (final IOException e) { |
| if (cachedException != null) { |
| throw cachedException; |
| } else { |
| throw new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass() |
| .getSimpleName()), e); |
| } |
| } |
| } |
| } |
| } |
| |
| public List<?> readCollection(final EntityPropertyInfo info, InputStream content, |
| final EntityProviderReadProperties properties) throws EntityProviderException { |
| JsonReader reader = null; |
| EntityProviderException cachedException = null; |
| |
| try { |
| reader = createJsonReader(content); |
| return new JsonPropertyConsumer().readCollection(reader, info, properties); |
| } catch (final UnsupportedEncodingException e) { |
| cachedException = new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED |
| .addContent(e.getClass().getSimpleName()), e); |
| throw cachedException; |
| } finally {// NOPMD (suppress DoNotThrowExceptionInFinally) |
| if (reader != null) { |
| try { |
| reader.close(); |
| } catch (final IOException e) { |
| if (cachedException != null) { |
| throw cachedException; |
| } else { |
| throw new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED |
| .addContent(e.getClass().getSimpleName()), e); |
| } |
| } |
| } |
| } |
| } |
| |
| public String readLink(final EdmEntitySet entitySet, final Object content) throws EntityProviderException { |
| JsonReader reader = null; |
| EntityProviderException cachedException = null; |
| |
| try { |
| reader = createJsonReader(content); |
| return new JsonLinkConsumer().readLink(reader, entitySet); |
| } catch (final UnsupportedEncodingException e) { |
| cachedException = |
| new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass() |
| .getSimpleName()), e); |
| throw cachedException; |
| } finally {// NOPMD (suppress DoNotThrowExceptionInFinally) |
| if (reader != null) { |
| try { |
| reader.close(); |
| } catch (final IOException e) { |
| if (cachedException != null) { |
| throw cachedException; |
| } else { |
| throw new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass() |
| .getSimpleName()), e); |
| } |
| } |
| } |
| } |
| } |
| |
| public List<String> readLinks(final EdmEntitySet entitySet, final Object content) throws EntityProviderException { |
| JsonReader reader = null; |
| EntityProviderException cachedException = null; |
| |
| try { |
| reader = createJsonReader(content); |
| return new JsonLinkConsumer().readLinks(reader, entitySet); |
| } catch (final UnsupportedEncodingException e) { |
| cachedException = |
| new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass() |
| .getSimpleName()), e); |
| throw cachedException; |
| } finally {// NOPMD (suppress DoNotThrowExceptionInFinally) |
| if (reader != null) { |
| try { |
| reader.close(); |
| } catch (final IOException e) { |
| if (cachedException != null) { |
| throw cachedException; |
| } else { |
| throw new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass() |
| .getSimpleName()), e); |
| } |
| } |
| } |
| } |
| } |
| |
| private JsonReader createJsonReader(final Object content) throws EntityProviderException, |
| UnsupportedEncodingException { |
| |
| if (content == null) { |
| throw new EntityProviderException(EntityProviderException.ILLEGAL_ARGUMENT |
| .addContent("Got not supported NULL object as content to de-serialize.")); |
| } |
| |
| if (content instanceof InputStream) { |
| return new JsonReader(new InputStreamReader((InputStream) content, DEFAULT_CHARSET)); |
| } |
| throw new EntityProviderException(EntityProviderException.ILLEGAL_ARGUMENT |
| .addContent("Found not supported content of class '" + content.getClass() + "' to de-serialize.")); |
| } |
| } |