diff options
Diffstat (limited to 'sca-java-2.x/tags/2.0.1-RC1/modules/implementation-widget/src/main/java/org/apache/tuscany/sca/implementation/widget/WidgetImplementationProcessor.java')
| -rw-r--r-- | sca-java-2.x/tags/2.0.1-RC1/modules/implementation-widget/src/main/java/org/apache/tuscany/sca/implementation/widget/WidgetImplementationProcessor.java | 285 |
1 files changed, 285 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/implementation-widget/src/main/java/org/apache/tuscany/sca/implementation/widget/WidgetImplementationProcessor.java b/sca-java-2.x/tags/2.0.1-RC1/modules/implementation-widget/src/main/java/org/apache/tuscany/sca/implementation/widget/WidgetImplementationProcessor.java new file mode 100644 index 0000000000..6db42c8832 --- /dev/null +++ b/sca-java-2.x/tags/2.0.1-RC1/modules/implementation-widget/src/main/java/org/apache/tuscany/sca/implementation/widget/WidgetImplementationProcessor.java @@ -0,0 +1,285 @@ +/* + * 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.widget; + +import static javax.xml.stream.XMLStreamConstants.END_ELEMENT; + +import java.net.MalformedURLException; +import java.net.URI; +import java.net.URL; + +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.assembly.AssemblyFactory; +import org.apache.tuscany.sca.assembly.Service; +import org.apache.tuscany.sca.binding.http.HTTPBinding; +import org.apache.tuscany.sca.binding.http.HTTPBindingFactory; +import org.apache.tuscany.sca.contribution.Artifact; +import org.apache.tuscany.sca.contribution.ContributionFactory; +import org.apache.tuscany.sca.contribution.processor.BaseStAXArtifactProcessor; +import org.apache.tuscany.sca.contribution.processor.ContributionReadException; +import org.apache.tuscany.sca.contribution.processor.ContributionResolveException; +import org.apache.tuscany.sca.contribution.processor.ContributionWriteException; +import org.apache.tuscany.sca.contribution.processor.ProcessorContext; +import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor; +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.interfacedef.InvalidInterfaceException; +import org.apache.tuscany.sca.interfacedef.java.JavaInterface; +import org.apache.tuscany.sca.interfacedef.java.JavaInterfaceContract; +import org.apache.tuscany.sca.interfacedef.java.JavaInterfaceFactory; +import org.apache.tuscany.sca.monitor.Monitor; +import org.apache.tuscany.sca.monitor.Problem; +import org.apache.tuscany.sca.monitor.Problem.Severity; + +/** + * + * Implements a StAX artifact processor for Widget implementations. + * + * @version $Rev$ $Date$ + */ +public class WidgetImplementationProcessor extends BaseStAXArtifactProcessor implements StAXArtifactProcessor<WidgetImplementation> { + private ExtensionPointRegistry registry; + private AssemblyFactory assemblyFactory; + private ContributionFactory contributionFactory; + private HTTPBindingFactory httpBindingFactory; + private JavaInterfaceFactory javaInterfaceFactory; + private WidgetImplementationFactory implementationFactory; + + public WidgetImplementationProcessor(ExtensionPointRegistry registry) { + this.registry = registry; + FactoryExtensionPoint modelFactories = registry.getExtensionPoint(FactoryExtensionPoint.class); + assemblyFactory = modelFactories.getFactory(AssemblyFactory.class); + contributionFactory = modelFactories.getFactory(ContributionFactory.class); + httpBindingFactory = modelFactories.getFactory(HTTPBindingFactory.class); + javaInterfaceFactory = modelFactories.getFactory(JavaInterfaceFactory.class); + implementationFactory = modelFactories.getFactory(WidgetImplementationFactory.class); + } + + public QName getArtifactType() { + // Returns the QName of the XML element processed by this processor + return WidgetImplementation.TYPE; + } + + public Class<WidgetImplementation> getModelType() { + // Returns the type of model processed by this processor + return WidgetImplementation.class; + } + + public WidgetImplementation read(XMLStreamReader reader, ProcessorContext context) throws ContributionReadException, XMLStreamException { + + // Read an <implementation.widget> element + + // Create and initialize the resource implementation model + WidgetImplementation implementation = implementationFactory.createWidgetImplementation(); + implementation.setUnresolved(true); + + // Read the location attribute specifying the location of the resources + String location = getURIString(reader, "location"); + if (location != null && location.isEmpty() == false) { + implementation.setLocation(location); + } else { + error(context.getMonitor(), "LocationAttributeMissing", reader); + //throw new ContributionReadException(MSG_LOCATION_MISSING); + } + + String widgetUri = getURIString(reader, "widgetUri"); + if(widgetUri != null && widgetUri.isEmpty() == false) { + implementation.setWidgetUri(widgetUri); + } else { + warning(context.getMonitor(), "UocationAttributeMissing", reader); + } + + // Skip to end element + while (reader.hasNext()) { + if (reader.next() == END_ELEMENT && WidgetImplementation.TYPE.equals(reader.getName())) { + break; + } + } + + return implementation; + } + + public void resolve(WidgetImplementation implementation, ModelResolver resolver, ProcessorContext context) throws ContributionResolveException { + + if (implementation != null) { + // Resolve the resource directory location + Artifact artifact = contributionFactory.createArtifact(); + artifact.setURI(implementation.getLocation()); + Artifact resolved = resolver.resolveModel(Artifact.class, artifact, context); + + if(resolved.getLocation() == null) { + URL resource = null; + URI uri = URI.create(implementation.getLocation()); + Artifact parent = context.getArtifact(); + if (!uri.isAbsolute()) { + if (parent != null && parent.getURI() != null) { + URI base = URI.create("/" + parent.getURI()); + uri = base.resolve(uri); + // Remove the leading / to make artifact resolver happy + if (uri.toString().startsWith("/")) { + uri = URI.create(uri.toString().substring(1)); + } + } + } + + + // The resource can be out of scope of the contribution root + if (parent != null && parent.getLocation() != null) { + try { + resource = new URL(new URL(parent.getLocation()), implementation.getLocation()); + + implementation.setLocationURL(resource); + + } catch (MalformedURLException e) { + ContributionResolveException ce = new ContributionResolveException(e); + error(context.getMonitor(), "ContributionResolveException", resolver, ce); + } + } + } else { + try { + implementation.setLocationURL(new URL(resolved.getLocation())); + } catch (MalformedURLException e) { + ContributionResolveException ce = new ContributionResolveException(e); + error(context.getMonitor(), "ContributionResolveException", resolver, ce); + } + } + + //introspect implementation + WidgetImplementationIntrospector widgetIntrospector = new WidgetImplementationIntrospector(registry, implementation); + widgetIntrospector.introspectImplementation(); + + implementation.setUnresolved(false); + + if(implementation.getWidgetUri() != null && implementation.getWidgetUri().isEmpty() == false) { + addService(implementation); + } + + + if (implementation.isUnresolved()) { + error(context.getMonitor(), "CouldNotResolveLocation", resolver, implementation.getLocation()); + //throw new ContributionResolveException("Could not resolve implementation.widget location: " + implementation.getLocation()); + } + } + } + + public void write(WidgetImplementation implementation, XMLStreamWriter writer, ProcessorContext context) throws ContributionWriteException, XMLStreamException { + // Write <implementation.widget> + writeStart(writer, WidgetImplementation.TYPE.getNamespaceURI(), WidgetImplementation.TYPE.getLocalPart()); + + if (implementation.getLocation() != null && implementation.getLocation().isEmpty() == false) { + writer.writeAttribute("location", implementation.getLocation()); + } + + if (implementation.getWidgetUri() != null && implementation.getWidgetUri().isEmpty() == false) { + writer.writeAttribute("widgetUri", implementation.getWidgetUri()); + } + + writeEnd(writer); + } + + /** + * Utility methods + */ + + private void addService(WidgetImplementation implementation) { + Service widgetService = null; + + // Resource implementation always provide a single service exposing + // the Resource interface, and have no references and properties + widgetService = assemblyFactory.createService(); + widgetService.setName("Widget"); + + // Create the Java interface contract for the Resource service + JavaInterface javaInterface; + try { + javaInterface = javaInterfaceFactory.createJavaInterface(Widget.class); + } catch (InvalidInterfaceException e) { + throw new IllegalArgumentException(e); + } + JavaInterfaceContract interfaceContract = javaInterfaceFactory.createJavaInterfaceContract(); + interfaceContract.setInterface(javaInterface); + widgetService.setInterfaceContract(interfaceContract); + + HTTPBinding binding = httpBindingFactory.createHTTPBinding(); + binding.setURI(implementation.getWidgetUri()); + widgetService.getBindings().add(binding); + + implementation.getServices().add(widgetService); + + } + + private void warning(Monitor monitor, String message, Object model, Object... messageParameters) { + if (monitor != null) { + Problem problem = + monitor.createProblem(this.getClass().getName(), + "impl-widget-validation-messages", + Severity.WARNING, + model, + message, + (Object[])messageParameters); + monitor.problem(problem); + } + } + + /** + * Report a error. + * + * @param problems + * @param message + * @param model + */ + private void error(Monitor monitor, String message, Object model, Object... messageParameters) { + if (monitor != null) { + Problem problem = + monitor.createProblem(this.getClass().getName(), + "impl-widget-validation-messages", + Severity.ERROR, + model, + message, + (Object[])messageParameters); + monitor.problem(problem); + } + } + + /** + * 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(), + "impl-widget-validation-messages", + Severity.ERROR, + model, + message, + ex); + monitor.problem(problem); + } + } + +} |