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diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/processor/DefaultStAXAttributeProcessorExtensionPoint.java b/sca-java-2.x/tags/2.0.1-RC1/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/processor/DefaultStAXAttributeProcessorExtensionPoint.java
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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.processor;
+
+import java.io.IOException;
+import java.lang.reflect.Constructor;
+import java.util.Collection;
+import java.util.Map;
+
+import javax.xml.namespace.QName;
+import javax.xml.stream.XMLInputFactory;
+import javax.xml.stream.XMLOutputFactory;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamReader;
+import javax.xml.stream.XMLStreamWriter;
+
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.core.FactoryExtensionPoint;
+import org.apache.tuscany.sca.core.UtilityExtensionPoint;
+import org.apache.tuscany.sca.extensibility.ServiceDeclaration;
+import org.apache.tuscany.sca.extensibility.ServiceDeclarationParser;
+import org.apache.tuscany.sca.monitor.Monitor;
+import org.apache.tuscany.sca.monitor.MonitorFactory;
+import org.apache.tuscany.sca.monitor.Problem;
+import org.apache.tuscany.sca.monitor.Problem.Severity;
+
+/**
+ * The default implementation of an extension point for StAX artifact processors.
+ *
+ * @version $Rev$ $Date$
+ */
+public class DefaultStAXAttributeProcessorExtensionPoint extends
+ DefaultArtifactProcessorExtensionPoint<StAXAttributeProcessor<?>> implements StAXAttributeProcessorExtensionPoint {
+
+ private FactoryExtensionPoint modelFactories;
+ private StAXAttributeProcessor<Object> extensibleStAXAttributeProcessor;
+ private boolean loaded;
+ private Monitor monitor = null;
+
+ /**
+ * Constructs a new extension point.
+ */
+ public DefaultStAXAttributeProcessorExtensionPoint(ExtensionPointRegistry extensionPoints) {
+ super(extensionPoints);
+ this.modelFactories = extensionPoints.getExtensionPoint(FactoryExtensionPoint.class);
+ XMLInputFactory inputFactory = modelFactories.getFactory(XMLInputFactory.class);
+ XMLOutputFactory outputFactory = modelFactories.getFactory(XMLOutputFactory.class);
+ UtilityExtensionPoint utilities = this.registry.getExtensionPoint(UtilityExtensionPoint.class);
+ MonitorFactory monitorFactory = utilities.getUtility(MonitorFactory.class);
+ if (monitorFactory != null) {
+ this.monitor = monitorFactory.createMonitor();
+ }
+ this.extensibleStAXAttributeProcessor = new ExtensibleStAXAttributeProcessor(this, inputFactory, outputFactory);
+ }
+
+ /**
+ * 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(),
+ "contribution-validation-messages",
+ Severity.ERROR,
+ model,
+ message,
+ ex);
+ monitor.problem(problem);
+ }
+ }
+
+ public void addArtifactProcessor(StAXAttributeProcessor<?> artifactProcessor) {
+ if (artifactProcessor.getArtifactType() != null) {
+ processorsByArtifactType.put((Object)artifactProcessor.getArtifactType(), artifactProcessor);
+ }
+ if (artifactProcessor.getModelType() != null) {
+ processorsByModelType.put(artifactProcessor.getModelType(), artifactProcessor);
+ }
+ }
+
+ public void removeArtifactProcessor(StAXAttributeProcessor<?> artifactProcessor) {
+ if (artifactProcessor.getArtifactType() != null) {
+ processorsByArtifactType.remove((Object)artifactProcessor.getArtifactType());
+ }
+ if (artifactProcessor.getModelType() != null) {
+ processorsByModelType.remove(artifactProcessor.getModelType());
+ }
+ }
+
+ @Override
+ public <T> StAXAttributeProcessor<T> getProcessor(Class<T> modelType) {
+ loadArtifactProcessors();
+ return (StAXAttributeProcessor<T>)super.getProcessor(modelType);
+ }
+
+ @Override
+ public StAXAttributeProcessor<?> getProcessor(Object artifactType) {
+ loadArtifactProcessors();
+ return super.getProcessor(artifactType);
+ }
+
+ /**
+ * Lazily load artifact processors registered in the extension point.
+ */
+ private synchronized void loadArtifactProcessors() {
+ if (loaded)
+ return;
+
+ // Get the processor service declarations
+ Collection<ServiceDeclaration> processorDeclarations;
+ try {
+ processorDeclarations =
+ registry.getServiceDiscovery().getServiceDeclarations(StAXAttributeProcessor.class.getName());
+ } catch (IOException e) {
+ IllegalStateException ie = new IllegalStateException(e);
+ error("IllegalStateException", extensibleStAXAttributeProcessor, ie);
+ throw ie;
+ }
+
+ for (ServiceDeclaration processorDeclaration : processorDeclarations) {
+ Map<String, String> attributes = processorDeclaration.getAttributes();
+
+ // Load a StAX artifact processor
+
+ // Get the model QName
+ QName artifactType = ServiceDeclarationParser.getQName(attributes.get("qname"));
+
+ // Get the model class name
+ String modelTypeName = attributes.get("model");
+
+ // Get the model factory class name
+ String factoryName = attributes.get("factory");
+
+ // Create a processor wrapper and register it
+ StAXAttributeProcessor<?> processor =
+ new LazyStAXAttributeProcessor(artifactType, modelTypeName, factoryName, processorDeclaration,
+ registry, modelFactories, extensibleStAXAttributeProcessor);
+ addArtifactProcessor(processor);
+ }
+
+ loaded = true;
+ }
+
+ /**
+ * A wrapper around an Artifact processor class allowing lazy loading and
+ * initialization of artifact processors.
+ */
+ private static class LazyStAXAttributeProcessor implements StAXAttributeProcessor {
+
+ private ExtensionPointRegistry extensionPoints;
+ private QName artifactType;
+ private String modelTypeName;
+ private String factoryName;
+ private ServiceDeclaration processorDeclaration;
+ private StAXAttributeProcessor<?> processor;
+ private Class<?> modelType;
+ private StAXAttributeProcessor<Object> extensionProcessor;
+
+ LazyStAXAttributeProcessor(QName artifactType,
+ String modelTypeName,
+ String factoryName,
+ ServiceDeclaration processorDeclaration,
+ ExtensionPointRegistry extensionPoints,
+ FactoryExtensionPoint modelFactories,
+ StAXAttributeProcessor<Object> extensionProcessor) {
+
+ this.extensionPoints = extensionPoints;
+ this.artifactType = artifactType;
+ this.modelTypeName = modelTypeName;
+ this.factoryName = factoryName;
+ this.processorDeclaration = processorDeclaration;
+ this.extensionProcessor = extensionProcessor;
+ }
+
+ public QName getArtifactType() {
+ return artifactType;
+ }
+
+ @SuppressWarnings("unchecked")
+ private StAXAttributeProcessor getProcessor() {
+ if (processor == null) {
+ FactoryExtensionPoint modelFactories = extensionPoints.getExtensionPoint(FactoryExtensionPoint.class);
+
+ // Load and instantiate the processor class
+ try {
+ Class<StAXAttributeProcessor> processorClass =
+ (Class<StAXAttributeProcessor>)processorDeclaration.loadClass();
+ try {
+ Constructor<StAXAttributeProcessor> constructor =
+ processorClass.getConstructor(FactoryExtensionPoint.class);
+ processor = constructor.newInstance(modelFactories);
+ } catch (NoSuchMethodException e) {
+ try {
+ Constructor<StAXAttributeProcessor> constructor =
+ processorClass.getConstructor(ExtensionPointRegistry.class);
+ processor = constructor.newInstance(extensionPoints);
+ } catch (NoSuchMethodException e1) {
+ try {
+ Constructor<StAXAttributeProcessor> constructor =
+ processorClass.getConstructor(FactoryExtensionPoint.class,
+ StAXArtifactProcessor.class);
+ processor = constructor.newInstance(modelFactories, extensionProcessor);
+ } catch (NoSuchMethodException e2) {
+ try {
+ Constructor<StAXAttributeProcessor> constructor =
+ processorClass.getConstructor(ExtensionPointRegistry.class,
+ StAXArtifactProcessor.class);
+ processor = constructor.newInstance(extensionPoints, extensionProcessor);
+ } catch (NoSuchMethodException e3) {
+ try {
+ Constructor<StAXAttributeProcessor> constructor =
+ processorClass.getConstructor(FactoryExtensionPoint.class);
+ processor = constructor.newInstance(modelFactories);
+ } catch (NoSuchMethodException e4) {
+ try {
+ Constructor<StAXAttributeProcessor> constructor =
+ processorClass.getConstructor(ExtensionPointRegistry.class);
+ processor = constructor.newInstance(extensionPoints);
+ } catch (NoSuchMethodException e4a) {
+
+ Constructor<StAXAttributeProcessor> constructor =
+ processorClass.getConstructor();
+ processor = constructor.newInstance();
+
+ }
+ }
+ }
+ }
+ }
+ }
+ } catch (Exception e) {
+ IllegalStateException ie = new IllegalStateException(e);
+ throw ie;
+ }
+
+ }
+ return processor;
+ }
+
+ public Object read(QName attributeName, XMLStreamReader inputSource, ProcessorContext context)
+ throws ContributionReadException, XMLStreamException {
+ return getProcessor().read(attributeName, inputSource, context);
+ }
+
+ @SuppressWarnings("unchecked")
+ public void write(Object model, XMLStreamWriter outputSource, ProcessorContext context)
+ throws ContributionWriteException, XMLStreamException {
+ getProcessor().write(model, outputSource, context);
+ }
+
+ public Class<?> getModelType() {
+ if (modelTypeName != null && modelType == null) {
+ try {
+ modelType = processorDeclaration.loadClass(modelTypeName);
+ } catch (Exception e) {
+ IllegalStateException ie = new IllegalStateException(e);
+ throw ie;
+ }
+ }
+ return modelType;
+ }
+
+ @SuppressWarnings("unchecked")
+ public void resolve(Object model, ModelResolver resolver, ProcessorContext context)
+ throws ContributionResolveException {
+ getProcessor().resolve(model, resolver, context);
+ }
+
+ }
+}