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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.net.URLConnection;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import java.util.HashSet;
import java.util.Set;
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.contribution.processor.ContributionReadException;
import org.apache.tuscany.sca.contribution.processor.ContributionResolveException;
import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
import org.apache.tuscany.sca.contribution.processor.URLArtifactProcessor;
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;
import org.apache.tuscany.sca.policy.BindingType;
import org.apache.tuscany.sca.policy.ImplementationType;
import org.apache.tuscany.sca.policy.Intent;
import org.apache.tuscany.sca.policy.PolicySet;
/**
* A SCA Definitions Document processor.
*
* @version $Rev$ $Date$
*/
public class DefinitionsDocumentProcessor implements URLArtifactProcessor<Definitions> {
private StAXArtifactProcessor<Object> extensionProcessor;
private XMLInputFactory inputFactory;
private DefinitionsFactory definitionsFactory;
private Monitor monitor;
/**
* Construct a new SCADefinitions processor
* @param assemblyFactory
* @param policyFactory
* @param staxProcessor
*/
public DefinitionsDocumentProcessor(StAXArtifactProcessor<Object> staxProcessor,
XMLInputFactory inputFactory,
DefinitionsFactory definitionsFactory,
Monitor monitor) {
this.extensionProcessor = (StAXArtifactProcessor<Object>)staxProcessor;
this.inputFactory = inputFactory;
this.definitionsFactory = definitionsFactory;
this.monitor = monitor;
}
/**
* Constructs a new SCADefinitions processor.
*
* @param modelFactories
* @param staxProcessor
*/
public DefinitionsDocumentProcessor(FactoryExtensionPoint modelFactories,
StAXArtifactProcessor<Object> staxProcessor,
Monitor monitor) {
this.extensionProcessor = (StAXArtifactProcessor<Object>)staxProcessor;
this.inputFactory = modelFactories.getFactory(XMLInputFactory.class);
this.definitionsFactory = modelFactories.getFactory(DefinitionsFactory.class);
this.monitor = monitor;
}
/**
* Report a exception.
*
* @param problems
* @param message
* @param model
*/
private void error(String message, Object model, Exception ex) {
if (monitor != null) {
Problem problem =
monitor.createProblem(this.getClass().getName(),
"definitions-xml-validation-messages",
Severity.ERROR,
model,
message,
ex);
monitor.problem(problem);
}
}
public Definitions read(URL contributionURL, final URI uri, final URL url) throws ContributionReadException {
InputStream urlStream = null;
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 {
URLConnection connection = url.openConnection();
connection.setUseCaches(false);
return connection.getInputStream();
}
});
} catch (PrivilegedActionException e) {
error("PrivilegedActionException", url, (IOException)e.getException());
throw (IOException)e.getException();
}
//urlStream = createInputStream(url);
XMLStreamReader reader = inputFactory.createXMLStreamReader(url.toString(), urlStream);
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);
if (model instanceof Definitions) {
DefinitionsUtil.aggregate((Definitions)model, definitions);
return definitions;
} else {
error("ContributionReadException", model, null);
}
}
}
return definitions;
} catch (XMLStreamException e) {
ContributionReadException ce = new ContributionReadException(e);
error("ContributionReadException", inputFactory, ce);
throw ce;
} catch (IOException e) {
ContributionReadException ce = new ContributionReadException(e);
error("ContributionReadException", inputFactory, ce);
throw ce;
} finally {
try {
if (urlStream != null) {
urlStream.close();
urlStream = null;
}
} catch (IOException ioe) {
//ignore
}
}
}
// FIXME: [rfeng] We need to validate the definitions against the Conformance Items
// defined by the SCA Policy Framework Spec V1.1
private static void stripDuplicates(Definitions definitions) {
Set<Intent> intents = new HashSet<Intent>(definitions.getIntents());
Set<PolicySet> policySets = new HashSet<PolicySet>(definitions.getPolicySets());
Set<BindingType> bindingTypes = new HashSet<BindingType>(definitions.getBindingTypes());
Set<ImplementationType> implementationTypes = new HashSet<ImplementationType>(definitions.getImplementationTypes());
definitions.getIntents().clear();
definitions.getIntents().addAll(intents);
definitions.getPolicySets().clear();
definitions.getPolicySets().addAll(policySets);
definitions.getBindingTypes().clear();
definitions.getBindingTypes().addAll(bindingTypes);
definitions.getImplementationTypes().clear();
definitions.getImplementationTypes().addAll(implementationTypes);
}
public void resolve(Definitions scaDefinitions, ModelResolver resolver) throws ContributionResolveException {
stripDuplicates(scaDefinitions);
extensionProcessor.resolve(scaDefinitions, resolver);
}
public String getArtifactType() {
return "/META-INF/definitions.xml";
}
public Class<Definitions> getModelType() {
return Definitions.class;
}
}
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