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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.topology.xml;
import java.util.List;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.stream.XMLStreamException;
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.Contract;
import org.apache.tuscany.sca.assembly.Implementation;
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.ContributionResolveException;
import org.apache.tuscany.sca.interfacedef.InterfaceContract;
import org.apache.tuscany.sca.topology.TopologyFactory;
/**
* A base class with utility methods for the other artifact processors in this module.
*
* @version $Rev$ $Date$
*/
public abstract class BaseTopologyArtifactProcessor extends BaseStAXArtifactProcessor implements Constants {
protected TopologyFactory topologyFactory;
protected AssemblyFactory assemblyFactory;
protected StAXArtifactProcessor<Object> extensionProcessor;
private static final DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
static {
domFactory.setNamespaceAware(true);
}
/**
* Construct a new BaseArtifactProcessor.
* @param factory
* @param policyFactory
*/
@SuppressWarnings("unchecked")
public BaseTopologyArtifactProcessor(TopologyFactory topologyFactory, AssemblyFactory assemblyFactory, StAXArtifactProcessor extensionProcessor) {
this.topologyFactory = topologyFactory;
this.assemblyFactory = assemblyFactory;
this.extensionProcessor = extensionProcessor;
}
/**
* Start an element.
* @param writer
* @param name
* @param attrs
* @throws XMLStreamException
*/
protected void writeStart(XMLStreamWriter writer, String name, XAttr... attrs) throws XMLStreamException {
writeStart(writer, TUSCANY_TOPOLOGY_10_NS, name, attrs);
}
/**
* Start a document.
* @param writer
* @throws XMLStreamException
*/
protected void writeStartDocument(XMLStreamWriter writer, String name, XAttr... attrs) throws XMLStreamException {
writeStartDocument(writer, TUSCANY_TOPOLOGY_10_NS, name, attrs);
}
/**
* Resolve an implementation.
* @param implementation
* @param resolver
* @return
* @throws ContributionResolveException
*/
protected Implementation resolveImplementation(Implementation implementation, ModelResolver resolver) throws ContributionResolveException {
if (implementation != null) {
if (implementation.isUnresolved()) {
implementation = resolver.resolveModel(Implementation.class, implementation);
// Lazily resolve implementations
if (implementation.isUnresolved()) {
extensionProcessor.resolve(implementation, resolver);
if (!implementation.isUnresolved()) {
resolver.addModel(implementation);
}
}
}
}
return implementation;
}
/**
* Resolve interface, callback interface and bindings on a list of contracts.
* @param contracts the list of contracts
* @param resolver the resolver to use to resolve models
*/
protected <C extends Contract> void resolveContracts(List<C> contracts, ModelResolver resolver) throws ContributionResolveException {
for (Contract contract: contracts) {
// Resolve the interface contract
InterfaceContract interfaceContract = contract.getInterfaceContract();
if (interfaceContract != null) {
extensionProcessor.resolve(interfaceContract, resolver);
}
// Resolve bindings
for (int i = 0, n = contract.getBindings().size(); i < n; i++) {
Binding binding = contract.getBindings().get(i);
extensionProcessor.resolve(binding, resolver);
}
// Resolve callback bindings
if (contract.getCallback() != null) {
for (int i = 0, n = contract.getCallback().getBindings().size(); i < n; i++) {
Binding binding = contract.getCallback().getBindings().get(i);
extensionProcessor.resolve(binding, resolver);
}
}
}
}
}
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