diff options
Diffstat (limited to 'tags/java/sca/1.5.1-RC1/modules/policy-xml/src/main/java/org/apache/tuscany/sca/policy/xml/IntentAttachPointTypeProcessor.java')
| -rw-r--r-- | tags/java/sca/1.5.1-RC1/modules/policy-xml/src/main/java/org/apache/tuscany/sca/policy/xml/IntentAttachPointTypeProcessor.java | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/tags/java/sca/1.5.1-RC1/modules/policy-xml/src/main/java/org/apache/tuscany/sca/policy/xml/IntentAttachPointTypeProcessor.java b/tags/java/sca/1.5.1-RC1/modules/policy-xml/src/main/java/org/apache/tuscany/sca/policy/xml/IntentAttachPointTypeProcessor.java new file mode 100644 index 0000000000..37e547c620 --- /dev/null +++ b/tags/java/sca/1.5.1-RC1/modules/policy-xml/src/main/java/org/apache/tuscany/sca/policy/xml/IntentAttachPointTypeProcessor.java @@ -0,0 +1,248 @@ +/* + * 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.policy.xml; + +import java.util.ArrayList; +import java.util.List; +import java.util.StringTokenizer; + +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.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.monitor.Problem; +import org.apache.tuscany.sca.monitor.Problem.Severity; +import org.apache.tuscany.sca.monitor.impl.ProblemImpl; +import org.apache.tuscany.sca.policy.Intent; +import org.apache.tuscany.sca.policy.IntentAttachPointType; +import org.apache.tuscany.sca.policy.IntentAttachPointTypeFactory; +import org.apache.tuscany.sca.policy.PolicyFactory; +import org.apache.tuscany.sca.policy.impl.BindingTypeImpl; +import org.apache.tuscany.sca.policy.impl.ImplementationTypeImpl; + + +/** + * Processor for handling XML models of ExtensionType meta data definitions + * + * @version $Rev$ $Date$ + */ +abstract class IntentAttachPointTypeProcessor extends BaseStAXArtifactProcessor implements StAXArtifactProcessor<IntentAttachPointType>, PolicyConstants { + + private IntentAttachPointTypeFactory attachPointTypeFactory; + private PolicyFactory policyFactory; + private Monitor monitor; + + protected abstract IntentAttachPointType resolveExtensionType(IntentAttachPointType extnType, ModelResolver resolver) throws ContributionResolveException; + + public IntentAttachPointTypeProcessor(PolicyFactory policyFactory, + IntentAttachPointTypeFactory attachPointTypeFactory, + StAXArtifactProcessor<Object> extensionProcessor, + Monitor monitor) { + this.policyFactory = policyFactory; + this.attachPointTypeFactory = attachPointTypeFactory; + this.monitor = monitor; + } + + /** + * Report a error. + * + * @param problems + * @param message + * @param model + */ + private void error(String message, Object model, Object... messageParameters) { + if (monitor != null) { + Problem problem = new ProblemImpl(this.getClass().getName(), "policy-xml-validation-messages", Severity.ERROR, model, message, (Object[])messageParameters); + monitor.problem(problem); + } + } + + public IntentAttachPointType read(XMLStreamReader reader) throws ContributionReadException, XMLStreamException { + QName type = getQName(reader, TYPE); + + if ( type != null ) { + if ( type.getLocalPart().startsWith(BINDING) ) { + IntentAttachPointType bindingType = attachPointTypeFactory.createBindingType(); + bindingType.setName(type); + bindingType.setUnresolved(true); + + readAlwaysProvidedIntents(bindingType, reader); + readMayProvideIntents(bindingType, reader); + return bindingType; + } else if ( type.getLocalPart().startsWith(IMPLEMENTATION) ) { + IntentAttachPointType implType = attachPointTypeFactory.createImplementationType(); + implType.setName(type); + implType.setUnresolved(true); + + readAlwaysProvidedIntents(implType, reader); + readMayProvideIntents(implType, reader); + return implType; + } else { + error("UnrecognizedIntentAttachPointType", reader, type); + //throw new ContributionReadException("Unrecognized IntentAttachPointType - " + type); + } + } else { + error("RequiredAttributeMissing", reader, TYPE); + //throw new ContributionReadException("Required attribute '" + TYPE + + //"' missing from BindingType Definition"); + } + return null; + } + + private void readAlwaysProvidedIntents(IntentAttachPointType extnType, XMLStreamReader reader) { + String value = reader.getAttributeValue(null, ALWAYS_PROVIDES); + if (value != null) { + List<Intent> alwaysProvided = extnType.getAlwaysProvidedIntents(); + for (StringTokenizer tokens = new StringTokenizer(value); tokens.hasMoreTokens();) { + QName qname = getQNameValue(reader, tokens.nextToken()); + Intent intent = policyFactory.createIntent(); + intent.setName(qname); + alwaysProvided.add(intent); + } + } + } + + private void readMayProvideIntents(IntentAttachPointType extnType, XMLStreamReader reader) { + String value = reader.getAttributeValue(null, MAY_PROVIDE); + if (value != null) { + List<Intent> mayProvide = extnType.getMayProvideIntents(); + for (StringTokenizer tokens = new StringTokenizer(value); tokens.hasMoreTokens();) { + QName qname = getQNameValue(reader, tokens.nextToken()); + Intent intent = policyFactory.createIntent(); + intent.setName(qname); + mayProvide.add(intent); + } + } + } + + public void write(IntentAttachPointType extnType, XMLStreamWriter writer) throws ContributionWriteException, XMLStreamException { + + // Write an <sca:bindingType or sca:implementationType> + if ( extnType instanceof BindingTypeImpl ) { + writer.writeStartElement(SCA10_NS, BINDING_TYPE); + } else if ( extnType instanceof ImplementationTypeImpl ) { + writer.writeStartElement(SCA10_NS, IMPLEMENTATION_TYPE); + } + + writeAlwaysProvidesIntentsAttribute(extnType, writer); + writeMayProvideIntentsAttribute(extnType, writer); + + writer.writeEndElement(); + } + + private void writeMayProvideIntentsAttribute(IntentAttachPointType extnType, XMLStreamWriter writer) throws XMLStreamException { + StringBuffer sb = new StringBuffer(); + for ( Intent intent : extnType.getMayProvideIntents() ) { + writer.writeNamespace(intent.getName().getPrefix(), intent.getName().getNamespaceURI()); + sb.append(intent.getName().getPrefix() + COLON + intent.getName().getLocalPart()); + sb.append(WHITE_SPACE); + } + + if ( sb.length() > 0 ) { + writer.writeAttribute(MAY_PROVIDE, sb.toString()); + } + } + + private void writeAlwaysProvidesIntentsAttribute(IntentAttachPointType extnType, XMLStreamWriter writer) throws XMLStreamException { + StringBuffer sb = new StringBuffer(); + for ( Intent intent : extnType.getAlwaysProvidedIntents() ) { + writer.writeNamespace(intent.getName().getPrefix(), intent.getName().getNamespaceURI()); + sb.append(intent.getName().getPrefix() + COLON + intent.getName().getLocalPart()); + sb.append(WHITE_SPACE); + } + + if ( sb.length() > 0 ) { + writer.writeAttribute(ALWAYS_PROVIDES, sb.toString()); + + } + } + + public void resolve(IntentAttachPointType extnType, ModelResolver resolver) throws ContributionResolveException { + + if (extnType != null && extnType.isUnresolved()) { + resolveAlwaysProvidedIntents(extnType, resolver); + resolveMayProvideIntents(extnType, resolver); + extnType.setUnresolved(false); + //resolveExtensionType(extnType, resolver); + } + } + + private void resolveAlwaysProvidedIntents(IntentAttachPointType extensionType, + ModelResolver resolver) throws ContributionResolveException { + if (extensionType != null) { + // resolve all provided intents + List<Intent> alwaysProvided = new ArrayList<Intent>(); + for (Intent providedIntent : extensionType.getAlwaysProvidedIntents()) { + if (providedIntent.isUnresolved()) { + providedIntent = resolver.resolveModel(Intent.class, providedIntent); + if (!providedIntent.isUnresolved()) { + alwaysProvided.add(providedIntent); + } else { + error("AlwaysProvidedIntentNotFound", resolver, providedIntent, extensionType); + //throw new ContributionResolveException("Always Provided Intent - " + providedIntent + //+ " not found for ExtensionType " + //+ extensionType); + } + } else { + alwaysProvided.add(providedIntent); + } + } + extensionType.getAlwaysProvidedIntents().clear(); + extensionType.getAlwaysProvidedIntents().addAll(alwaysProvided); + } + } + + private void resolveMayProvideIntents(IntentAttachPointType extensionType, + ModelResolver resolver) throws ContributionResolveException { + if (extensionType != null) { + // resolve all provided intents + List<Intent> mayProvide = new ArrayList<Intent>(); + for (Intent providedIntent : extensionType.getMayProvideIntents()) { + if (providedIntent.isUnresolved()) { + providedIntent = resolver.resolveModel(Intent.class, providedIntent); + if (!providedIntent.isUnresolved()) { + mayProvide.add(providedIntent); + } else { + error("MayProvideIntentNotFound", resolver, providedIntent, extensionType); + //throw new ContributionResolveException("May Provide Intent - " + providedIntent + //+ " not found for ExtensionType " + //+ extensionType); + } + } else { + mayProvide.add(providedIntent); + } + } + extensionType.getMayProvideIntents().clear(); + extensionType.getMayProvideIntents().addAll(mayProvide); + } + } + + public Class<IntentAttachPointType> getModelType() { + return IntentAttachPointType.class; + } +} |