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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.contribution.xml;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.net.URL;
import javax.xml.stream.XMLInputFactory;
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.ContributionMetadata;
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.monitor.Monitor;
import org.apache.tuscany.sca.monitor.Problem;
import org.apache.tuscany.sca.monitor.Problem.Severity;
/**
* URLArtifactProcessor that handles sca-contribution.xml files.
*
* @version $Rev$ $Date$
*/
public class ContributionMetadataDocumentProcessor implements URLArtifactProcessor<ContributionMetadata>{
private final StAXArtifactProcessor staxProcessor;
private final XMLInputFactory inputFactory;
public ContributionMetadataDocumentProcessor(XMLInputFactory inputFactory,
StAXArtifactProcessor staxProcessor) {
this.inputFactory = inputFactory;
this.staxProcessor = staxProcessor;
}
public ContributionMetadataDocumentProcessor(FactoryExtensionPoint modelFactories,
StAXArtifactProcessor staxProcessor) {
this.inputFactory = modelFactories.getFactory(ValidatingXMLInputFactory.class);
this.staxProcessor = staxProcessor;
}
public String getArtifactType() {
return "/META-INF/sca-contribution.xml";
}
public Class<ContributionMetadata> getModelType() {
return ContributionMetadata.class;
}
public ContributionMetadata read(URL contributionURL, URI uri, URL url, ProcessorContext context) throws ContributionReadException {
InputStream urlStream = null;
try {
// Create a stream reader
urlStream = IOHelper.openStream(url);
XMLStreamReader reader = inputFactory.createXMLStreamReader(url.toString(), urlStream);
ValidatingXMLInputFactory.setMonitor(reader, context.getMonitor());
reader.nextTag();
// Read the contribution model
ContributionMetadata contribution = (ContributionMetadata)staxProcessor.read(reader, context);
return contribution;
} catch (XMLStreamException e) {
ContributionReadException ex = new ContributionReadException(e);
error(context.getMonitor(), "XMLStreamException", inputFactory, ex);
throw ex;
} catch (IOException e) {
ContributionReadException ex = new ContributionReadException(e);
error(context.getMonitor(), "IOException", inputFactory, ex);
throw ex;
} finally {
try {
if (urlStream != null) {
urlStream.close();
urlStream = null;
}
} catch (IOException ioe) {
//ignore
}
}
}
public void resolve(ContributionMetadata contribution, ModelResolver resolver, ProcessorContext context) throws ContributionResolveException {
staxProcessor.resolve(contribution, resolver, context);
}
/**
* 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(), "contribution-xml-validation-messages", Severity.ERROR, model, message, ex);
monitor.problem(problem);
}
}
}
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