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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.sca.definitions.xml;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.net.URL;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import org.apache.tuscany.sca.common.java.io.IOHelper;
import org.apache.tuscany.sca.contribution.processor.ContributionReadException;
import org.apache.tuscany.sca.contribution.processor.ContributionResolveException;
import org.apache.tuscany.sca.contribution.processor.ProcessorContext;
import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
import org.apache.tuscany.sca.contribution.processor.URLArtifactProcessor;
import org.apache.tuscany.sca.contribution.processor.ValidatingXMLInputFactory;
import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
import org.apache.tuscany.sca.core.FactoryExtensionPoint;
import org.apache.tuscany.sca.definitions.Definitions;
import org.apache.tuscany.sca.definitions.DefinitionsFactory;
import org.apache.tuscany.sca.definitions.util.DefinitionsUtil;
import org.apache.tuscany.sca.monitor.Monitor;
import org.apache.tuscany.sca.monitor.Problem;
import org.apache.tuscany.sca.monitor.Problem.Severity;
/**
* A SCA Definitions Document processor.
*
* @version $Rev$ $Date$
*/
public class DefinitionsDocumentProcessor implements URLArtifactProcessor<Definitions> {
private StAXArtifactProcessor<Object> extensionProcessor;
private XMLInputFactory inputFactory;
private DefinitionsFactory definitionsFactory;
/**
* Constructs a new SCADefinitions processor.
*
* @param modelFactories
* @param staxProcessor
*/
public DefinitionsDocumentProcessor(FactoryExtensionPoint modelFactories,
StAXArtifactProcessor<Object> staxProcessor) {
this.extensionProcessor = (StAXArtifactProcessor<Object>)staxProcessor;
this.inputFactory = modelFactories.getFactory(ValidatingXMLInputFactory.class);
this.definitionsFactory = modelFactories.getFactory(DefinitionsFactory.class);
}
/**
* Report a exception.
*
* @param problems
* @param message
* @param model
*/
private void error(Monitor monitor, String message, Object model, Exception ex) {
if (monitor != null) {
Problem problem =
monitor.createProblem(this.getClass().getName(),
Messages.RESOURCE_BUNDLE,
Severity.ERROR,
model,
message,
ex);
monitor.problem(problem);
}
}
public Definitions read(URL contributionURL, final URI uri, final URL url, ProcessorContext context) throws ContributionReadException {
InputStream urlStream = null;
Monitor monitor = context.getMonitor();
monitor.pushContext("Definitions: " + url);
try {
// Allow privileged access to open URL stream. Add FilePermission to added to security
// policy file.
try {
urlStream = AccessController.doPrivileged(new PrivilegedExceptionAction<InputStream>() {
public InputStream run() throws IOException {
return IOHelper.openStream(url);
}
});
} catch (PrivilegedActionException e) {
error(monitor, "PrivilegedActionException", url, (IOException)e.getException());
throw (IOException)e.getException();
}
//urlStream = createInputStream(url);
XMLStreamReader reader = inputFactory.createXMLStreamReader(url.toString(), urlStream);
ValidatingXMLInputFactory.setMonitor(reader, context.getMonitor());
Definitions definitions = definitionsFactory.createDefinitions();
int event = reader.getEventType();
while (reader.hasNext()) {
event = reader.next();
// We only deal with the root element
if (event == XMLStreamConstants.START_ELEMENT) {
// QName name = reader.getName();
Object model = extensionProcessor.read(reader, context);
if (model instanceof Definitions) {
DefinitionsUtil.aggregate((Definitions)model, definitions, monitor);
return definitions;
} else {
error(monitor, "ContributionReadException", model, null);
}
}
}
return definitions;
} catch (XMLStreamException e) {
ContributionReadException ce = new ContributionReadException(e);
error(monitor, "ContributionReadException", inputFactory, ce);
throw ce;
} catch (IOException e) {
ContributionReadException ce = new ContributionReadException(e);
error(monitor, "ContributionReadException", inputFactory, ce);
throw ce;
} finally {
try {
if (urlStream != null) {
urlStream.close();
urlStream = null;
}
} catch (IOException ioe) {
//ignore
}
monitor.popContext();
}
}
public void resolve(Definitions scaDefinitions, ModelResolver resolver, ProcessorContext context) throws ContributionResolveException {
extensionProcessor.resolve(scaDefinitions, resolver, context);
}
public String getArtifactType() {
return "/META-INF/definitions.xml";
}
public Class<Definitions> getModelType() {
return Definitions.class;
}
}
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