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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.workspace.xml;
import static javax.xml.stream.XMLStreamConstants.END_ELEMENT;
import static javax.xml.stream.XMLStreamConstants.START_ELEMENT;
import java.util.List;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import org.apache.tuscany.sca.contribution.Contribution;
import org.apache.tuscany.sca.contribution.ContributionFactory;
import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
import org.apache.tuscany.sca.contribution.processor.BaseStAXArtifactProcessor;
import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
import org.apache.tuscany.sca.contribution.service.ContributionReadException;
import org.apache.tuscany.sca.contribution.service.ContributionResolveException;
import org.apache.tuscany.sca.contribution.service.ContributionWriteException;
import org.apache.tuscany.sca.monitor.Monitor;
import org.apache.tuscany.sca.workspace.Workspace;
import org.apache.tuscany.sca.workspace.WorkspaceFactory;
/**
* A contribution workspace processor.
*
* @version $Rev$ $Date$
*/
public class WorkspaceProcessor extends BaseStAXArtifactProcessor implements StAXArtifactProcessor<Workspace> {
private static final String SCA10_TUSCANY_NS = "http://tuscany.apache.org/xmlns/sca/1.0";
private static final QName WORKSPACE_QNAME = new QName(SCA10_TUSCANY_NS, "workspace");
private static final QName CONTRIBUTION_QNAME = new QName(SCA10_TUSCANY_NS, "contribution");
private static final String URI = "uri";
private static final String LOCATION = "location";
private WorkspaceFactory workspaceFactory;
private ContributionFactory contributionFactory;
/**
* Constructs a new contribution workspace processor.
*
* @param contributionFactory
* @param extensionProcessor
*/
public WorkspaceProcessor(WorkspaceFactory workspaceFactory, ContributionFactory contributionFactory, StAXArtifactProcessor<Object> extensionProcessor) {
this.workspaceFactory = workspaceFactory;
this.contributionFactory = contributionFactory;
}
/**
* Constructs a new contribution workspace processor.
*
* @param modelFactories
* @param extensionProcessor
*/
public WorkspaceProcessor(ModelFactoryExtensionPoint modelFactories, StAXArtifactProcessor<Object> extensionProcessor, Monitor monitor) {
this.workspaceFactory = modelFactories.getFactory(WorkspaceFactory.class);
this.contributionFactory = modelFactories.getFactory(ContributionFactory.class);
}
public Workspace read(XMLStreamReader reader) throws ContributionReadException, XMLStreamException {
Workspace workspace = null;
Contribution contribution = null;
// Read the workspace document
while (reader.hasNext()) {
int event = reader.getEventType();
switch (event) {
case START_ELEMENT:
QName name = reader.getName();
if (WORKSPACE_QNAME.equals(name)) {
// Read a <workspace>
workspace = workspaceFactory.createWorkspace();
workspace.setUnresolved(true);
} else if (CONTRIBUTION_QNAME.equals(name)) {
// Read a <contribution>
contribution = contributionFactory.createContribution();
contribution.setURI(getString(reader, URI));
contribution.setLocation(getString(reader, LOCATION));
contribution.setUnresolved(true);
workspace.getContributions().add(contribution);
}
break;
case END_ELEMENT:
name = reader.getName();
// Clear current state when reading reaching end element
if (CONTRIBUTION_QNAME.equals(name)) {
contribution = null;
}
break;
}
// Read the next element
if (reader.hasNext()) {
reader.next();
}
}
return workspace;
}
public void write(Workspace workspace, XMLStreamWriter writer) throws ContributionWriteException, XMLStreamException {
// Write <workspace> element
writeStartDocument(writer, WORKSPACE_QNAME);
// Write <contribution> elements
for (Contribution contribution: workspace.getContributions()) {
writeStart(writer, CONTRIBUTION_QNAME,
new XAttr(URI, contribution.getURI()), new XAttr(LOCATION, contribution.getLocation()));
writeEnd(writer);
}
writeEndDocument(writer);
}
public void resolve(Workspace workspace, ModelResolver resolver) throws ContributionResolveException {
// Resolve the contributions referenced by the workspace
List<Contribution> contributions = workspace.getContributions();
for (int i = 0, n = contributions.size(); i < n; i++) {
Contribution contribution = contributions.get(i);
Contribution resolved = resolver.resolveModel(Contribution.class, contribution);
if (resolved != contribution) {
contributions.set(i, resolved);
}
}
workspace.setUnresolved(false);
}
public QName getArtifactType() {
return WORKSPACE_QNAME;
}
public Class<Workspace> getModelType() {
return Workspace.class;
}
}
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