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Diffstat (limited to 'sca-java-1.x/tags/0.91-incubating/modules/assembly-xml/src/main/java/org/apache/tuscany/sca/assembly/xml/CompositeProcessor.java')
| -rw-r--r-- | sca-java-1.x/tags/0.91-incubating/modules/assembly-xml/src/main/java/org/apache/tuscany/sca/assembly/xml/CompositeProcessor.java | 498 |
1 files changed, 498 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/0.91-incubating/modules/assembly-xml/src/main/java/org/apache/tuscany/sca/assembly/xml/CompositeProcessor.java b/sca-java-1.x/tags/0.91-incubating/modules/assembly-xml/src/main/java/org/apache/tuscany/sca/assembly/xml/CompositeProcessor.java new file mode 100644 index 0000000000..962aeb67dd --- /dev/null +++ b/sca-java-1.x/tags/0.91-incubating/modules/assembly-xml/src/main/java/org/apache/tuscany/sca/assembly/xml/CompositeProcessor.java @@ -0,0 +1,498 @@ +/* + * 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.assembly.xml; + +import static javax.xml.stream.XMLStreamConstants.END_ELEMENT; +import static javax.xml.stream.XMLStreamConstants.START_ELEMENT; + +import java.util.StringTokenizer; + +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.Binding; +import org.apache.tuscany.sca.assembly.Callback; +import org.apache.tuscany.sca.assembly.Component; +import org.apache.tuscany.sca.assembly.ComponentProperty; +import org.apache.tuscany.sca.assembly.ComponentReference; +import org.apache.tuscany.sca.assembly.ComponentService; +import org.apache.tuscany.sca.assembly.Composite; +import org.apache.tuscany.sca.assembly.CompositeReference; +import org.apache.tuscany.sca.assembly.CompositeService; +import org.apache.tuscany.sca.assembly.ConstrainingType; +import org.apache.tuscany.sca.assembly.Contract; +import org.apache.tuscany.sca.assembly.Implementation; +import org.apache.tuscany.sca.assembly.Property; +import org.apache.tuscany.sca.assembly.Reference; +import org.apache.tuscany.sca.assembly.Service; +import org.apache.tuscany.sca.assembly.Wire; +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.interfacedef.InterfaceContract; +import org.apache.tuscany.sca.interfacedef.InterfaceContractMapper; +import org.apache.tuscany.sca.interfacedef.Operation; +import org.apache.tuscany.sca.policy.PolicyFactory; + +/** + * A composite processor. + * + * @version $Rev$ $Date$ + */ +public class CompositeProcessor extends BaseArtifactProcessor implements StAXArtifactProcessor<Composite> { + + /** + * Construct a new composite processor + * @param assemblyFactory + * @param policyFactory + * @param extensionProcessor + */ + public CompositeProcessor(AssemblyFactory factory, PolicyFactory policyFactory, + InterfaceContractMapper interfaceContractMapper, + StAXArtifactProcessor extensionProcessor) { + super(factory, policyFactory, extensionProcessor); + } + + public Composite read(XMLStreamReader reader) throws ContributionReadException { + Composite composite = null; + Composite include = null; + Component component = null; + Property property = null; + ComponentService componentService = null; + ComponentReference componentReference = null; + ComponentProperty componentProperty = null; + CompositeService compositeService = null; + CompositeReference compositeReference = null; + Contract contract = null; + Wire wire = null; + Callback callback = null; + QName name = null; + + try { + + // Read the composite document + while (reader.hasNext()) { + int event = reader.getEventType(); + switch (event) { + case START_ELEMENT: + name = reader.getName(); + + if (COMPOSITE_QNAME.equals(name)) { + + // Read a <composite> + composite = assemblyFactory.createComposite(); + composite.setName(new QName(getString(reader, TARGET_NAMESPACE), getString(reader, NAME))); + composite.setAutowire(getBoolean(reader, AUTOWIRE)); + composite.setLocal(getBoolean(reader, LOCAL)); + composite.setConstrainingType(getConstrainingType(reader)); + readPolicies(composite, reader); + + } else if (INCLUDE_QNAME.equals(name)) { + + // Read an <include> + include = assemblyFactory.createComposite(); + include.setName(getQName(reader, "name")); + include.setUnresolved(true); + composite.getIncludes().add(include); + + } else if (SERVICE_QNAME.equals(name)) { + if (component != null) { + + // Read a <component><service> + componentService = assemblyFactory.createComponentService(); + contract = componentService; + componentService.setName(getString(reader, NAME)); + component.getServices().add(componentService); + readPolicies(contract, reader); + } else { + + // Read a <composite><service> + compositeService = assemblyFactory.createCompositeService(); + contract = compositeService; + compositeService.setName(getString(reader, NAME)); + + ComponentService promoted = assemblyFactory.createComponentService(); + promoted.setUnresolved(true); + promoted.setName(getString(reader, PROMOTE)); + compositeService.setPromotedService(promoted); + + composite.getServices().add(compositeService); + readPolicies(contract, reader); + } + + } else if (REFERENCE_QNAME.equals(name)) { + if (component != null) { + // Read a <component><reference> + componentReference = assemblyFactory.createComponentReference(); + contract = componentReference; + componentReference.setName(getString(reader, NAME)); + readMultiplicity(componentReference, reader); + componentReference.setAutowire(getBoolean(reader, AUTOWIRE)); + readTargets(componentReference, reader); + componentReference.setWiredByImpl(getBoolean(reader, WIRED_BY_IMPL)); + component.getReferences().add(componentReference); + readPolicies(contract, reader); + } else { + // Read a <composite><reference> + compositeReference = assemblyFactory.createCompositeReference(); + contract = compositeReference; + compositeReference.setName(getString(reader, NAME)); + readMultiplicity(compositeReference, reader); + readTargets(compositeReference, reader); + readPromotes(compositeReference, reader); + compositeReference.setWiredByImpl(getBoolean(reader, WIRED_BY_IMPL)); + composite.getReferences().add(compositeReference); + readPolicies(contract, reader); + } + + } else if (PROPERTY_QNAME.equals(name)) { + if (component != null) { + // Read a <component><property> + componentProperty = assemblyFactory.createComponentProperty(); + property = componentProperty; + componentProperty.setSource(getString(reader, SOURCE)); + componentProperty.setFile(getString(reader, FILE)); + readPolicies(property, reader); + readProperty(componentProperty, reader); + component.getProperties().add(componentProperty); + } else { + + // Read a <composite><property> + property = assemblyFactory.createProperty(); + readPolicies(property, reader); + readProperty(property, reader); + composite.getProperties().add(property); + } + + } else if (COMPONENT_QNAME.equals(name)) { + + // Read a <component> + component = assemblyFactory.createComponent(); + component.setName(getString(reader, NAME)); + component.setConstrainingType(getConstrainingType(reader)); + composite.getComponents().add(component); + readPolicies(component, reader); + + } else if (WIRE_QNAME.equals(name)) { + + // Read a <wire> + wire = assemblyFactory.createWire(); + ComponentReference source = assemblyFactory.createComponentReference(); + source.setUnresolved(true); + source.setName(getString(reader, SOURCE)); + wire.setSource(source); + + ComponentService target = assemblyFactory.createComponentService(); + target.setUnresolved(true); + target.setName(getString(reader, TARGET)); + wire.setTarget(target); + + composite.getWires().add(wire); + readPolicies(wire, reader); + + } else if (CALLBACK_QNAME.equals(name)) { + + // Read a <callback> + callback = assemblyFactory.createCallback(); + contract.setCallback(callback); + readPolicies(callback, reader); + + } else if (OPERATION_QNAME.equals(name)) { + + // Read an <operation> + Operation operation = assemblyFactory.createOperation(); + operation.setName(getString(reader, NAME)); + operation.setUnresolved(true); + if (callback != null) { + readPolicies(callback, operation, reader); + } else { + readPolicies(contract, operation, reader); + } + } else if (IMPLEMENTATION_COMPOSITE_QNAME.equals(name)) { + + // Read an implementation.composite + Composite implementation = assemblyFactory.createComposite(); + implementation.setName(getQName(reader, NAME)); + implementation.setUnresolved(true); + component.setImplementation(implementation); + + } else { + + // Read an extension element + Object extension = extensionProcessor.read(reader); + if (extension != null) { + if (extension instanceof InterfaceContract) { + + // <service><interface> and + // <reference><interface> + contract.setInterfaceContract((InterfaceContract)extension); + + } else if (extension instanceof Binding) { + // <service><binding> and <reference><binding> + contract.getBindings().add((Binding)extension); + + } else if (extension instanceof Implementation) { + + // <component><implementation> + component.setImplementation((Implementation)extension); + } else { + + // FIXME: We need to decide where to host the extensions + composite.getExtensions().add(extension); + } + } + } + break; + + case XMLStreamConstants.CHARACTERS: + break; + + case END_ELEMENT: + name = reader.getName(); + + // Clear current state when reading reaching end element + if (SERVICE_QNAME.equals(name)) { + componentService = null; + compositeService = null; + contract = null; + } else if (INCLUDE_QNAME.equals(name)) { + include = null; + } else if (REFERENCE_QNAME.equals(name)) { + componentReference = null; + compositeReference = null; + contract = null; + } else if (PROPERTY_QNAME.equals(name)) { + componentProperty = null; + property = null; + } else if (COMPONENT_QNAME.equals(name)) { + component = null; + } else if (WIRE_QNAME.equals(name)) { + wire = null; + } else if (CALLBACK_QNAME.equals(name)) { + callback = null; + } + break; + } + + // Read the next element + if (reader.hasNext()) { + reader.next(); + } + } + return composite; + + } catch (XMLStreamException e) { + throw new ContributionReadException(e); + } + } + + public void write(Composite composite, XMLStreamWriter writer) throws ContributionWriteException { + + try { + writeStartDocument(writer, COMPOSITE, + new XAttr(CONSTRAINING_TYPE, getConstrainingTypeAttr(composite)), + new XAttr(TARGET_NAMESPACE, composite.getName().getNamespaceURI()), + new XAttr(NAME, composite.getName().getLocalPart())); + + for (Service service : composite.getServices()) { + CompositeService compositeService = (CompositeService)service; + ComponentService promotedService = compositeService.getPromotedService(); + String promote = promotedService != null ? promotedService.getName() : null; + writeStart(writer, SERVICE, new XAttr(NAME, service.getName()), new XAttr(PROMOTE, promote)); + + extensionProcessor.write(service.getInterfaceContract(), writer); + + for (Binding binding: service.getBindings()) { + extensionProcessor.write(binding, writer); + } + + if (service.getCallback() != null) { + writeStart(writer, CALLBACK); + writeEnd(writer); + } + writeEnd(writer); + } + + for (Component component : composite.getComponents()) { + writeStart(writer, COMPONENT, new XAttr(NAME, component.getName())); + + for (ComponentService service : component.getServices()) { + writeStart(writer, SERVICE, new XAttr(NAME, service.getName())); + + extensionProcessor.write(service.getInterfaceContract(), writer); + + for (Binding binding: service.getBindings()) { + extensionProcessor.write(binding, writer); + } + + if (service.getCallback() != null) { + writeStart(writer, CALLBACK); + writeEnd(writer); + } + writeEnd(writer); + } + + for (ComponentReference reference : component.getReferences()) { + // TODO handle multivalued target attribute + String target = reference.getTargets().isEmpty() ? null : reference.getTargets().get(0).getName(); + writeStart(writer, REFERENCE, + new XAttr(NAME, reference.getName()), + new XAttr(TARGET,target)); + + extensionProcessor.write(reference.getInterfaceContract(), writer); + + for (Binding binding: reference.getBindings()) { + extensionProcessor.write(binding, writer); + } + + if (reference.getCallback() != null) { + writeStart(writer, CALLBACK); + writeEnd(writer); + } + writeEnd(writer); + } + + for (ComponentProperty property : component.getProperties()) { + writeStart(writer, PROPERTY, new XAttr(NAME, property.getName())); + writeEnd(writer); + } + + // Write the component implementation + Implementation implementation = component.getImplementation(); + if (implementation instanceof Composite) { + writeStart(writer, IMPLEMENTATION_COMPOSITE, + new XAttr(NAME, composite.getName())); + writeEnd(writer); + } else { + extensionProcessor.write(component.getImplementation(), writer); + } + + writeEnd(writer); + } + + for (Reference reference : composite.getReferences()) { + // TODO handle multivalued promote attribute + CompositeReference compositeReference = (CompositeReference)reference; + String promote; + if (!compositeReference.getPromotedReferences().isEmpty()) + promote = compositeReference.getPromotedReferences().get(0).getName(); + else + promote = null; + writeStart(writer, REFERENCE, + new XAttr(NAME, reference.getName()), + new XAttr(PROMOTE, promote)); + + extensionProcessor.write(reference.getInterfaceContract(), writer); + + for (Binding binding: reference.getBindings()) { + extensionProcessor.write(binding, writer); + } + + if (reference.getCallback() != null) { + writeStart(writer, CALLBACK); + writeEnd(writer); + } + writeEnd(writer); + } + + for (Property property : composite.getProperties()) { + writeStart(writer, PROPERTY, new XAttr(NAME, property.getName())); + writeEnd(writer); + } + + writeEndDocument(writer); + + } catch (XMLStreamException e) { + throw new ContributionWriteException(e); + } + } + + public void resolve(Composite composite, ModelResolver resolver) throws ContributionResolveException { + + // Resolve constraining type + ConstrainingType constrainingType = composite.getConstrainingType(); + constrainingType = resolver.resolveModel(ConstrainingType.class, constrainingType); + composite.setConstrainingType(constrainingType); + + // Resolve includes in the composite + for (int i = 0, n = composite.getIncludes().size(); i < n; i++) { + Composite include = composite.getIncludes().get(i); + include = resolver.resolveModel(Composite.class, include); + composite.getIncludes().set(i, include); + } + + // resolve and extensions to the standard SCDL that appear in the + // SCDL. + for (int i = 0, n = composite.getExtensions().size(); i < n; i++) { + Object model = composite.getExtensions().get(i); + extensionProcessor.resolve(model, resolver); + } + + // Resolve component implementations, services and references + for (Component component: composite.getComponents()) { + constrainingType = component.getConstrainingType(); + constrainingType = resolver.resolveModel(ConstrainingType.class, constrainingType); + component.setConstrainingType(constrainingType); + + Implementation implementation = component.getImplementation(); + implementation = resolveImplementation(implementation, resolver); + component.setImplementation(implementation); + + resolveContracts(component.getServices(), resolver); + resolveContracts(component.getReferences(), resolver); + } + + // Resolve composite services and references + resolveContracts(composite.getServices(), resolver); + resolveContracts(composite.getReferences(), resolver); + } + + public QName getArtifactType() { + return COMPOSITE_QNAME; + } + + public Class<Composite> getModelType() { + return Composite.class; + } + + /** + * Read list of refence targets + * @param reference + * @param reader + */ + protected void readPromotes(CompositeReference reference, XMLStreamReader reader) { + String value = reader.getAttributeValue(null, Constants.PROMOTE); + ComponentReference promoted = null; + if (value != null) { + for (StringTokenizer tokens = new StringTokenizer(value); tokens.hasMoreTokens();) { + promoted = assemblyFactory.createComponentReference(); + promoted.setUnresolved(true); + promoted.setName(tokens.nextToken()); + reference.getPromotedReferences().add(promoted); + } + } + } +} |