| /******************************************************************************* |
| * 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.producer; |
| |
| import java.io.IOException; |
| import java.io.Writer; |
| import java.util.List; |
| |
| import org.apache.olingo.odata2.api.edm.Edm; |
| import org.apache.olingo.odata2.api.edm.EdmException; |
| import org.apache.olingo.odata2.api.ep.EntityProviderException; |
| import org.apache.olingo.odata2.core.ep.EntityProviderProducerException; |
| import org.apache.olingo.odata2.core.ep.aggregator.EntityPropertyInfo; |
| import org.apache.olingo.odata2.core.ep.util.FormatJson; |
| import org.apache.olingo.odata2.core.ep.util.JsonStreamWriter; |
| |
| /** |
| * Provider for writing a collection of simple-type or complex-type instances in JSON. |
| * |
| */ |
| public class JsonCollectionEntityProducer { |
| |
| public void append(final Writer writer, final EntityPropertyInfo propertyInfo, final List<?> data) |
| throws EntityProviderException { |
| JsonStreamWriter jsonStreamWriter = new JsonStreamWriter(writer); |
| |
| try { |
| jsonStreamWriter.beginObject() |
| .name(FormatJson.D) |
| .beginObject(); |
| |
| jsonStreamWriter.name(FormatJson.METADATA) |
| .beginObject() |
| .namedStringValueRaw( |
| FormatJson.TYPE, |
| "Collection(" + propertyInfo.getType().getNamespace() + Edm.DELIMITER + propertyInfo.getType().getName() |
| + ")") |
| .endObject() |
| .separator(); |
| |
| jsonStreamWriter.name(FormatJson.RESULTS) |
| .beginArray(); |
| boolean first = true; |
| for (final Object item : data) { |
| if (first) { |
| first = false; |
| } else { |
| jsonStreamWriter.separator(); |
| } |
| JsonPropertyEntityProducer.appendPropertyValue(jsonStreamWriter, propertyInfo, item, true, false); |
| } |
| jsonStreamWriter.endArray(); |
| |
| jsonStreamWriter.endObject() |
| .endObject(); |
| } catch (final IOException e) { |
| throw new EntityProviderProducerException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass() |
| .getSimpleName()), e); |
| } catch (final EdmException e) { |
| throw new EntityProviderProducerException(e.getMessageReference(), e); |
| } |
| } |
| } |