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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.assembly.builder.impl;
import java.util.List;
import org.apache.tuscany.sca.assembly.AssemblyFactory;
import org.apache.tuscany.sca.assembly.Binding;
import org.apache.tuscany.sca.assembly.Component;
import org.apache.tuscany.sca.assembly.ComponentReference;
import org.apache.tuscany.sca.assembly.Composite;
import org.apache.tuscany.sca.assembly.CompositeReference;
import org.apache.tuscany.sca.assembly.Implementation;
import org.apache.tuscany.sca.assembly.Reference;
import org.apache.tuscany.sca.assembly.builder.AutomaticBinding;
import org.apache.tuscany.sca.assembly.builder.CompositeBuilder;
import org.apache.tuscany.sca.assembly.builder.CompositeBuilderException;
import org.apache.tuscany.sca.definitions.Definitions;
import org.apache.tuscany.sca.monitor.Monitor;
/**
* A composite builder that handles the configuration of composite references.
*
* @version $Rev: 651179 $ $Date: 2008-04-24 08:21:13 +0100 (Thu, 24 Apr 2008) $
*/
public class CompositeReferenceConfigurationBuilderImpl implements CompositeBuilder {
private AssemblyFactory assemblyFactory;
public CompositeReferenceConfigurationBuilderImpl(AssemblyFactory assemblyFactory) {
this.assemblyFactory = assemblyFactory;
}
public String getID() {
return "org.apache.tuscany.sca.assembly.builder.CompositeReferenceConfigurationBuilder";
}
public void build(Composite composite, Definitions definitions, Monitor monitor) throws CompositeBuilderException {
// Process nested composites recursively
configureNestedCompositeReferences(composite);
// Process top level composite references
// TODO - In OASIS the treament of top level composite references is different so need to review
for (Reference reference : composite.getReferences()) {
CompositeReference compositeReference = (CompositeReference)reference;
// Get the next lower level promoted reference
List<ComponentReference> promotedRefs = compositeReference.getPromotedReferences();
if (!promotedRefs.isEmpty()) {
if (promotedRefs.size() == 1) {
ComponentReference promotedReference = promotedRefs.get(0);
// Set the bindings using the top level bindings to override the lower level bindings
if (bindingsSpecifiedManually(compositeReference.getBindings())) {
compositeReference.setPromotionOverride(true);
} else if (bindingsSpecifiedManually(promotedReference.getBindings()) ) {
compositeReference.getBindings().clear();
for (Binding binding : promotedReference.getBindings()) {
try {
compositeReference.getBindings().add((Binding)binding.clone());
} catch (CloneNotSupportedException ex) {
// this binding can't be used in the promoted reference
}
}
}
if (compositeReference.getInterfaceContract() != null &&
compositeReference.getInterfaceContract().getCallbackInterface() != null) {
if (compositeReference.getCallback() != null &&
bindingsSpecifiedManually(compositeReference.getCallback().getBindings())) {
compositeReference.setPromotionOverride(true);
} else if (promotedReference.getCallback() != null &&
bindingsSpecifiedManually(promotedReference.getCallback().getBindings())) {
if (compositeReference.getCallback() != null) {
compositeReference.getCallback().getBindings().clear();
} else {
compositeReference.setCallback(assemblyFactory.createCallback());
}
for (Binding binding : promotedReference.getCallback().getBindings()) {
try {
compositeReference.getCallback().getBindings().add((Binding)binding.clone());
} catch (CloneNotSupportedException ex) {
// this binding can't be used in the promoted reference
}
}
}
}
} else {
// This composite reference promotes multiple component references.
// Because the component reference bindings can all be different, we don't
// copy any of them up to this composite reference, which will therefore always
// have its own binding, even if it's only the default SCA binding.
if (bindingsSpecifiedManually(compositeReference.getBindings()) ||
(compositeReference.getCallback() != null &&
bindingsSpecifiedManually(compositeReference.getCallback().getBindings()))) {
compositeReference.setPromotionOverride(true);
}
}
}
}
}
private void configureNestedCompositeReferences(Composite composite) {
// Process nested composites recursively
for (Component component : composite.getComponents()) {
Implementation implementation = component.getImplementation();
if (implementation instanceof Composite) {
// First process nested composites
configureNestedCompositeReferences((Composite)implementation);
// Process the component references declared on components in this composite
for (ComponentReference componentReference : component.getReferences()) {
Reference implReference = componentReference.getReference();
if (implReference != null && implReference instanceof CompositeReference) {
CompositeReference compositeReference = (CompositeReference)implReference;
// Get the next lower level promoted reference
List<ComponentReference> promotedRefs = compositeReference.getPromotedReferences();
if (!promotedRefs.isEmpty()) {
if (promotedRefs.size() == 1) {
ComponentReference promotedReference = promotedRefs.get(0);
// Set the bindings using the top level bindings to override the lower level bindings
if (!bindingsSpecifiedManually(compositeReference.getBindings()) &&
bindingsSpecifiedManually(promotedReference.getBindings()) ) {
compositeReference.getBindings().clear();
for (Binding binding : promotedReference.getBindings()) {
try {
compositeReference.getBindings().add((Binding)binding.clone());
} catch (CloneNotSupportedException ex) {
// this binding can't be used in the promoted reference
}
}
}
if (bindingsSpecifiedManually(componentReference.getBindings())) {
componentReference.setPromotionOverride(true);
} else if (bindingsSpecifiedManually(compositeReference.getBindings()) ) {
componentReference.getBindings().clear();
componentReference.getBindings().addAll(compositeReference.getBindings());
}
if (componentReference.getInterfaceContract() != null &&
componentReference.getInterfaceContract().getCallbackInterface() != null) {
if (!(compositeReference.getCallback() != null &&
bindingsSpecifiedManually(compositeReference.getCallback().getBindings())) &&
promotedReference.getCallback() != null &&
bindingsSpecifiedManually(promotedReference.getCallback().getBindings())) {
if (compositeReference.getCallback() != null) {
compositeReference.getCallback().getBindings().clear();
} else {
compositeReference.setCallback(assemblyFactory.createCallback());
}
compositeReference.getCallback().getBindings().addAll(
promotedReference.getCallback().getBindings());
}
if (componentReference.getCallback() != null &&
bindingsSpecifiedManually(componentReference.getCallback().getBindings())) {
componentReference.setPromotionOverride(true);
} else if (compositeReference.getCallback() != null &&
bindingsSpecifiedManually(compositeReference.getCallback().getBindings())) {
if (componentReference.getCallback() != null) {
componentReference.getCallback().getBindings().clear();
} else {
componentReference.setCallback(assemblyFactory.createCallback());
}
for (Binding binding : compositeReference.getCallback().getBindings()) {
try {
componentReference.getCallback().getBindings().add((Binding)binding.clone());
} catch (CloneNotSupportedException ex) {
// this binding can't be used in the promoted reference
}
}
}
}
} else {
// This component reference promotes multiple lower-level component references.
// Because the lower-level component reference bindings can all be different,
// we don't copy any of them up to this component reference, which will therefore
// always have its own binding, even if it's only the default SCA binding.
if (bindingsSpecifiedManually(componentReference.getBindings()) ||
(componentReference.getCallback() != null &&
bindingsSpecifiedManually(componentReference.getCallback().getBindings()))) {
componentReference.setPromotionOverride(true);
}
}
}
}
}
}
}
}
/**
* If the bindings are specified in the composite file return true as they should
* otherwise return false
*
* @param bindings
* @return true if the bindings were specified manually
*/
private boolean bindingsSpecifiedManually(List<Binding> bindings) {
if (bindings.size() > 1) {
return true;
} else if (bindings.size() == 1 &&
bindings.get(0) instanceof AutomaticBinding &&
((AutomaticBinding)bindings.get(0)).getIsAutomatic()) {
return false;
} else if (bindings.size() == 1) {
return true;
} else {
return false;
}
}
}
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