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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.tuscany.sdo.util.resource;
import java.io.IOException;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import java.util.HashMap;
import java.util.Map;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import org.apache.tuscany.sdo.util.StAX2SAXAdapter;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.xmi.XMIException;
import org.eclipse.emf.ecore.xmi.XMLHelper;
import org.eclipse.emf.ecore.xmi.XMLLoad;
import org.eclipse.emf.ecore.xmi.XMLResource;
import org.eclipse.emf.ecore.xmi.impl.XMLHelperImpl;
import org.eclipse.emf.ecore.xmi.impl.XMLLoadImpl;
import org.eclipse.emf.ecore.xmi.impl.XMLResourceImpl;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
public class SDOXMLResourceImpl extends XMLResourceImpl {
private XMLStreamReader reader;
/**
* [rfeng] Override the XMLHelperImpl to replace the NamespaceSupport so that it's aware of the NamespaceContext from the XMLStreamReader
*/
public static class SDOXMLHelperImpl extends XMLHelperImpl {
private static class StreamNamespaceSupport extends XMLHelperImpl.NamespaceSupport {
private XMLStreamReader reader;
public String getPrefix(String uri) {
if (reader == null)
return super.getPrefix(uri);
String prefix = null;
try {
prefix = uri != null ? reader.getNamespaceContext().getPrefix(uri) : null;
} catch (Exception e) {
// HACK:
// java.lang.UnsupportedOperationException
// at org.apache.axiom.om.impl.llom.OMStAXWrapper.getNamespaceContext(OMStAXWrapper.java:984)
prefix = null;
}
return prefix != null ? prefix : super.getPrefix(uri);
}
public String getURI(String prefix) {
if (reader == null)
return super.getURI(prefix);
String uri;
try {
uri = prefix != null ? reader.getNamespaceContext().getNamespaceURI(prefix) : null;
} catch (Exception e) {
// HACK:
// java.lang.UnsupportedOperationException
// at org.apache.axiom.om.impl.llom.OMStAXWrapper.getNamespaceContext(OMStAXWrapper.java:984)
uri = null;
}
return uri != null && uri.length()!=0 ? uri : super.getURI(prefix);
}
public StreamNamespaceSupport(XMLStreamReader reader) {
super();
this.reader = reader;
}
}
public SDOXMLHelperImpl(XMLResource resource, XMLStreamReader reader) {
this(reader);
setResource(resource);
}
public SDOXMLHelperImpl(XMLStreamReader reader) {
super();
this.namespaceSupport = new StreamNamespaceSupport(reader);
}
}
/**
* An EMF XMLLoad that loads a model from a StAX stream
*/
public class SDOXMLLoadImpl extends XMLLoadImpl {
public SDOXMLLoadImpl(XMLHelper helper) {
super(helper);
}
/**
* Start parsing an XMLReader with the default handler.
*/
public void load(XMLResource resource, final XMLStreamReader reader, Map options) throws IOException {
this.resource = resource;
Map mergedOptions = new HashMap(defaultLoadOptions);
if (options != null)
mergedOptions.putAll(options);
this.options = mergedOptions;
final ContentHandler handler = makeDefaultHandler();
if (errors != null) {
errors.clear();
}
final StAX2SAXAdapter adapter = new StAX2SAXAdapter(true);
// Parse the XMLReader and generate SAX events
try {
AccessController.doPrivileged(new PrivilegedExceptionAction() {
public Object run() throws XMLStreamException, SAXException {
adapter.parse(reader, handler);
return null;
}
});
} catch (PrivilegedActionException e) {
throw new Resource.IOWrappedException(e.getException());
}
helper = null;
if (!resource.getErrors().isEmpty()) {
Exception error = (Exception) resource.getErrors().get(0);
if (error instanceof XMIException) {
XMIException exception = (XMIException) error;
if (exception.getWrappedException() != null) {
throw new Resource.IOWrappedException(exception.getWrappedException());
}
}
throw new Resource.IOWrappedException(error);
}
}
}
public SDOXMLResourceImpl(URI uri) {
super(uri);
}
protected XMLHelper createXMLHelper() {
return new SDOXMLHelperImpl(this, reader);
}
/**
* @see org.eclipse.emf.ecore.xmi.impl.XMLResourceImpl#createXMLLoad()
*/
protected XMLLoad createXMLLoad() {
return new SDOXMLLoadImpl(createXMLHelper());
}
/**
* Loads the resource from a StAX XMLStreamReader.
*/
public void load(XMLStreamReader reader, Map options) throws IOException {
this.reader = reader;
SDOXMLLoadImpl xmlLoad = (SDOXMLLoadImpl) createXMLLoad();
Map mergedOptions = new HashMap(defaultLoadOptions);
if (options != null)
mergedOptions.putAll(options);
xmlLoad.load(this, reader, mergedOptions);
}
}
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