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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.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;
}
}
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