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Diffstat (limited to 'sca-java-1.x/branches/sca-java-1.6.2/modules/implementation-node/src/main/java/org/apache/tuscany/sca/implementation/node/xml/ConfiguredNodeImplementationProcessor.java')
| -rw-r--r-- | sca-java-1.x/branches/sca-java-1.6.2/modules/implementation-node/src/main/java/org/apache/tuscany/sca/implementation/node/xml/ConfiguredNodeImplementationProcessor.java | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/sca-java-1.x/branches/sca-java-1.6.2/modules/implementation-node/src/main/java/org/apache/tuscany/sca/implementation/node/xml/ConfiguredNodeImplementationProcessor.java b/sca-java-1.x/branches/sca-java-1.6.2/modules/implementation-node/src/main/java/org/apache/tuscany/sca/implementation/node/xml/ConfiguredNodeImplementationProcessor.java new file mode 100644 index 0000000000..e695340d45 --- /dev/null +++ b/sca-java-1.x/branches/sca-java-1.6.2/modules/implementation-node/src/main/java/org/apache/tuscany/sca/implementation/node/xml/ConfiguredNodeImplementationProcessor.java @@ -0,0 +1,196 @@ +/* + * 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.implementation.node.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.XMLStreamConstants; +import javax.xml.stream.XMLStreamException; +import javax.xml.stream.XMLStreamReader; +import javax.xml.stream.XMLStreamWriter; + +import org.apache.tuscany.sca.assembly.AssemblyFactory; +import org.apache.tuscany.sca.assembly.Composite; +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.implementation.node.ConfiguredNodeImplementation; +import org.apache.tuscany.sca.implementation.node.NodeImplementationFactory; +import org.apache.tuscany.sca.monitor.Monitor; + + +/** + * Implements a StAX artifact processor for configured node implementations. + * + * @version $Rev$ $Date$ + */ +public class ConfiguredNodeImplementationProcessor extends BaseStAXArtifactProcessor implements StAXArtifactProcessor<ConfiguredNodeImplementation> { + + private static final String ATOM_NS = "http://www.w3.org/2005/Atom"; + private static final QName FEED_QNAME = new QName(ATOM_NS, "feed"); + private static final QName ENTRY_QNAME = new QName(ATOM_NS, "entry"); + private static final QName ID_QNAME = new QName(ATOM_NS, "id"); + private static final QName LINK_QNAME = new QName(ATOM_NS, "link"); + private static final String HREF = "href"; + + private ContributionFactory contributionFactory; + private AssemblyFactory assemblyFactory; + private NodeImplementationFactory implementationFactory; + + public ConfiguredNodeImplementationProcessor(ModelFactoryExtensionPoint modelFactories, Monitor monitor) { + this.contributionFactory = modelFactories.getFactory(ContributionFactory.class); + this.assemblyFactory = modelFactories.getFactory(AssemblyFactory.class); + this.implementationFactory = modelFactories.getFactory(NodeImplementationFactory.class); + } + + public QName getArtifactType() { + return null; + } + + public Class<ConfiguredNodeImplementation> getModelType() { + // Returns the type of model processed by this processor + return ConfiguredNodeImplementation.class; + } + + public ConfiguredNodeImplementation read(XMLStreamReader reader) throws ContributionReadException, XMLStreamException { + + ConfiguredNodeImplementation implementation = implementationFactory.createConfiguredNodeImplementation(); + implementation.setUnresolved(true); + + // Read a feed containing links to the composite and the contributions assigned to + // the node + Composite composite = null; + Contribution contribution = null; + boolean id = false; + QName name = null; + + while (reader.hasNext()) { + int event = reader.getEventType(); + switch (event) { + + case START_ELEMENT: + name = reader.getName(); + + if (ENTRY_QNAME.equals(name)) { + + // Read an <entry> + if (implementation.getComposite() == null) { + composite = assemblyFactory.createComposite(); + } else { + contribution = contributionFactory.createContribution(); + } + } else if (ID_QNAME.equals(name)) { + + // Read an <id> + id = true; + + } else if (LINK_QNAME.equals(name)) { + + // Read a <link> + String href = getString(reader, HREF); + + if (composite != null) { + composite.setURI(href); + } else if (contribution != null) { + contribution.setLocation(href); + } + } + break; + + case XMLStreamConstants.CHARACTERS: + + // Read characters inside an <id> element + if (id) { + if (contribution != null) { + contribution.setURI(reader.getText()); + } + } + break; + + case END_ELEMENT: + name = reader.getName(); + + // Clear current state when reading reaching end element + if (ENTRY_QNAME.equals(name)) { + if (composite != null) { + implementation.setComposite(composite); + } else if (contribution != null) { + implementation.getContributions().add(contribution); + } + + composite = null; + contribution = null; + + } else if (ID_QNAME.equals(name)) { + id = false; + + } else if (FEED_QNAME.equals(name)) { + + // We've reached the end of the feed + return implementation; + } + break; + } + + // Read the next element + if (reader.hasNext()) { + reader.next(); + } + } + return implementation; + } + + public void resolve(ConfiguredNodeImplementation implementation, ModelResolver resolver) throws ContributionResolveException { + + // Resolve the referenced composite + Composite composite = implementation.getComposite(); + if (composite != null) { + composite = resolver.resolveModel(Composite.class, composite); + if (!composite.isUnresolved()) { + implementation.setComposite(composite); + } + } + + // Resolve the referenced contributions + List<Contribution> contributions = implementation.getContributions(); + for (int i = 0, n = contributions.size(); i < n; i++) { + Contribution contribution = contributions.get(i); + contribution = resolver.resolveModel(Contribution.class, contribution); + if (!contribution.isUnresolved()) { + contributions.set(i, contribution); + } + } + + implementation.setUnresolved(false); + } + + public void write(ConfiguredNodeImplementation implementation, XMLStreamWriter writer) throws ContributionWriteException, XMLStreamException { + //TODO Write the feed describing the node configuration + } +} |