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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
* under the License.
******************************************************************************/
package org.apache.olingo.odata2.core.ep.consumer;
import java.io.InputStream;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import org.apache.olingo.odata2.api.edm.EdmEntitySet;
import org.apache.olingo.odata2.api.edm.EdmException;
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.EntityProviderReadProperties.EntityProviderReadPropertiesBuilder;
import org.apache.olingo.odata2.api.ep.entry.ODataEntry;
import org.apache.olingo.odata2.api.ep.feed.ODataDeltaFeed;
import org.apache.olingo.odata2.core.commons.XmlHelper;
import org.apache.olingo.odata2.core.ep.aggregator.EntityInfoAggregator;
/**
* Xml entity (content type dependent) consumer for reading input (from <code>content</code>).
*
*
*/
public class XmlEntityConsumer {
public XmlEntityConsumer() throws EntityProviderException {
super();
}
public ODataDeltaFeed readFeed(final EdmEntitySet entitySet, final InputStream content,
final EntityProviderReadProperties properties) throws EntityProviderException {
XMLStreamReader reader = null;
EntityProviderException cachedException = null;
try {
reader = XmlHelper.createStreamReader(content);
EntityInfoAggregator eia = EntityInfoAggregator.create(entitySet);
XmlFeedConsumer xfc = new XmlFeedConsumer();
return xfc.readFeed(reader, eia, properties);
} catch (EntityProviderException e) {
cachedException = e;
throw cachedException;
} finally {// NOPMD (suppress DoNotThrowExceptionInFinally)
if (reader != null) {
try {
reader.close();
} catch (XMLStreamException e) {
if (cachedException != null) {
throw cachedException;
} else {
throw new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass()
.getSimpleName()), e);
}
}
}
}
}
public ODataEntry readEntry(final EdmEntitySet entitySet, final InputStream content,
final EntityProviderReadProperties properties) throws EntityProviderException {
XMLStreamReader reader = null;
EntityProviderException cachedException = null;
try {
reader = XmlHelper.createStreamReader(content);
EntityInfoAggregator eia = EntityInfoAggregator.create(entitySet);
return new XmlEntryConsumer().readEntry(reader, eia, properties);
} catch (EntityProviderException e) {
cachedException = e;
throw cachedException;
} finally {// NOPMD (suppress DoNotThrowExceptionInFinally)
if (reader != null) {
try {
reader.close();
} catch (XMLStreamException 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, final InputStream content,
final EntityProviderReadProperties properties) throws EntityProviderException {
XMLStreamReader reader = null;
EntityProviderException cachedException = null;
XmlPropertyConsumer xec = new XmlPropertyConsumer();
try {
reader = XmlHelper.createStreamReader(content);
Map<String, Object> result =
xec.readProperty(reader, edmProperty, properties.getMergeSemantic(), properties.getTypeMappings());
return result;
} catch (EntityProviderException e) {
cachedException = e;
throw cachedException;
} finally {// NOPMD (suppress DoNotThrowExceptionInFinally)
if (reader != null) {
try {
reader.close();
} catch (XMLStreamException e) {
if (cachedException != null) {
throw cachedException;
} else {
throw new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass()
.getSimpleName()), e);
}
}
}
}
}
public Object readPropertyValue(final EdmProperty edmProperty, final InputStream content)
throws EntityProviderException {
return readPropertyValue(edmProperty, content, null);
}
public Object readPropertyValue(final EdmProperty edmProperty, final InputStream content, final Class<?> typeMapping)
throws EntityProviderException {
try {
final Map<String, Object> result;
EntityProviderReadPropertiesBuilder propertiesBuilder = EntityProviderReadProperties.init().mergeSemantic(false);
if (typeMapping == null) {
result = readProperty(edmProperty, content, propertiesBuilder.build());
} else {
Map<String, Object> typeMappings = new HashMap<String, Object>();
typeMappings.put(edmProperty.getName(), typeMapping);
result = readProperty(edmProperty, content, propertiesBuilder.addTypeMappings(typeMappings).build());
}
return result.get(edmProperty.getName());
} catch (EdmException e) {
throw new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass()
.getSimpleName()), e);
}
}
public String readLink(final EdmEntitySet entitySet, final Object content) throws EntityProviderException {
XMLStreamReader reader = null;
EntityProviderException cachedException = null;
XmlLinkConsumer xlc = new XmlLinkConsumer();
try {
reader = XmlHelper.createStreamReader(content);
return xlc.readLink(reader, entitySet);
} catch (EntityProviderException e) {
cachedException = e;
throw cachedException;
} finally {// NOPMD (suppress DoNotThrowExceptionInFinally)
if (reader != null) {
try {
reader.close();
} catch (XMLStreamException 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 {
XMLStreamReader reader = null;
EntityProviderException cachedException = null;
XmlLinkConsumer xlc = new XmlLinkConsumer();
try {
reader = XmlHelper.createStreamReader(content);
return xlc.readLinks(reader, entitySet);
} catch (EntityProviderException e) {
cachedException = e;
throw cachedException;
} finally {// NOPMD (suppress DoNotThrowExceptionInFinally)
if (reader != null) {
try {
reader.close();
} catch (XMLStreamException e) {
if (cachedException != null) {
throw cachedException;
} else {
throw new EntityProviderException(EntityProviderException.EXCEPTION_OCCURRED.addContent(e.getClass()
.getSimpleName()), e);
}
}
}
}
}
}