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* 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
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******************************************************************************/
package org.apache.olingo.odata2.core.ep.producer;
import java.io.IOException;
import java.io.Writer;
import java.util.Map;
import org.apache.olingo.odata2.api.ep.EntityProviderException;
import org.apache.olingo.odata2.api.ep.EntityProviderWriteProperties;
import org.apache.olingo.odata2.core.ep.aggregator.EntityInfoAggregator;
import org.apache.olingo.odata2.core.ep.util.FormatJson;
import org.apache.olingo.odata2.core.ep.util.JsonStreamWriter;
/**
* Producer for writing a link in JSON.
*
*/
public class JsonLinkEntityProducer {
private final EntityProviderWriteProperties properties;
public JsonLinkEntityProducer(final EntityProviderWriteProperties properties) throws EntityProviderException {
this.properties = properties == null ? EntityProviderWriteProperties.serviceRoot(null).build() : properties;
}
public void append(final Writer writer, final EntityInfoAggregator entityInfo, final Map<String, Object> data)
throws EntityProviderException {
JsonStreamWriter jsonStreamWriter = new JsonStreamWriter(writer);
final String uri = (properties.getServiceRoot() == null ? "" : properties.getServiceRoot().toASCIIString())
+ AtomEntryEntityProducer.createSelfLink(entityInfo, data, null);
try {
jsonStreamWriter.beginObject()
.name(FormatJson.D);
appendUri(jsonStreamWriter, uri);
jsonStreamWriter.endObject();
} catch (final IOException e) {
throw new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass()
.getSimpleName()), e);
}
}
protected static void appendUri(final JsonStreamWriter jsonStreamWriter, final String uri) throws IOException {
jsonStreamWriter.beginObject()
.namedStringValue(FormatJson.URI, uri)
.endObject();
}
}