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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.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.apache.tuscany.sca.assembly.AssemblyFactory;
import org.apache.tuscany.sca.assembly.Binding;
import org.apache.tuscany.sca.assembly.ComponentReference;
import org.apache.tuscany.sca.assembly.CompositeReference;
import org.apache.tuscany.sca.assembly.Endpoint;
import org.apache.tuscany.sca.assembly.EndpointFactory;
import org.apache.tuscany.sca.assembly.Multiplicity;
import org.apache.tuscany.sca.assembly.OptimizableBinding;
import org.apache.tuscany.sca.assembly.Reference;
import org.apache.tuscany.sca.monitor.Monitor;
import org.apache.tuscany.sca.monitor.Problem;
import org.apache.tuscany.sca.monitor.Problem.Severity;
/**
* This class encapsulates utility methods to deal with reference definitions
*
* @version $Rev$ $Date$
*/
abstract class ReferenceConfigurationUtil {
/**
* Report a warning.
*
* @param problems
* @param message
* @param model
*/
private static void warning(Monitor monitor, String message, Object model, String... messageParameters) {
if (monitor != null) {
Problem problem = monitor.createProblem(ReferenceConfigurationUtil.class.getName(), "assembly-validation-messages", Severity.WARNING, model, message, (Object[])messageParameters);
monitor.problem(problem);
}
}
static boolean isValidMultiplicityOverride(Multiplicity definedMul, Multiplicity overridenMul) {
if (definedMul != overridenMul) {
switch (definedMul) {
case ZERO_N:
return overridenMul == Multiplicity.ZERO_ONE;
case ONE_N:
return overridenMul == Multiplicity.ONE_ONE;
default:
return false;
}
} else {
return true;
}
}
static boolean validateMultiplicityAndTargets(Multiplicity multiplicity,
List<?> targets, List<Binding> bindings) {
// Count targets
int count = targets.size();
//FIXME workaround, this validation is sometimes invoked too early
// before we get a chance to init the multiplicity attribute
if (multiplicity == null) {
return true;
}
switch (multiplicity) {
case ZERO_N:
break;
case ZERO_ONE:
if (count > 1) {
return false;
}
break;
case ONE_ONE:
if (count != 1) {
if (count == 0) {
for (Binding binding: bindings) {
if (!(binding instanceof OptimizableBinding) || binding.getURI()!=null) {
return true;
}
}
}
return false;
}
break;
case ONE_N:
if (count < 1) {
if (count == 0) {
for (Binding binding: bindings) {
if (!(binding instanceof OptimizableBinding) || binding.getURI()!=null) {
return true;
}
}
}
return false;
}
break;
}
return true;
}
/**
* Follow a reference promotion chain down to the innermost (non composite)
* component references.
*
* @param compositeReference
* @return
*/
static List<ComponentReference> getPromotedComponentReferences(CompositeReference compositeReference) {
List<ComponentReference> componentReferences = new ArrayList<ComponentReference>();
collectPromotedComponentReferences(compositeReference, componentReferences);
return componentReferences;
}
/**
* Follow a reference promotion chain down to the innermost (non composite)
* component references.
*
* @param compositeReference
* @param componentReferences
* @return
*/
private static void collectPromotedComponentReferences(CompositeReference compositeReference,
List<ComponentReference> componentReferences) {
for (ComponentReference componentReference : compositeReference.getPromotedReferences()) {
Reference reference = componentReference.getReference();
if (reference instanceof CompositeReference) {
// Continue to follow the reference promotion chain
collectPromotedComponentReferences((CompositeReference)reference, componentReferences);
} else if (reference != null) {
// Found a non-composite reference
componentReferences.add(componentReference);
}
}
}
/**
* Override the bindings for a promoted reference from an outer component
* reference
*
* @param reference
* @param promotedReference
*/
static void reconcileReferenceBindings(Reference reference,
ComponentReference promotedReference,
AssemblyFactory assemblyFactory,
EndpointFactory endpointFactory,
Monitor monitor) {
if (promotedReference.getMultiplicity() == Multiplicity.ONE_ONE ||
promotedReference.getMultiplicity() == Multiplicity.ZERO_ONE) {
// if necessary override the promoted endpoints (and bindings) with the top level bindings
if (reference.getBindings().size() > 0 ){
List<Binding> bindingsToCopyDown = new ArrayList<Binding>();
List<Endpoint> endpointsToCopyDown = new ArrayList<Endpoint>();
for (Binding binding : reference.getBindings()) {
if ((!(binding instanceof OptimizableBinding)) || binding.getURI() != null) {
bindingsToCopyDown.add(binding);
if (reference instanceof ComponentReference){
for (Endpoint endpoint : ((ComponentReference)reference).getEndpoints()){
if ( endpoint.getSourceBinding() == binding){
endpointsToCopyDown.add(endpoint);
break;
}
}
} else {
// create a new endpoint to represent this promoted binding
Endpoint endpoint = endpointFactory.createEndpoint();
endpoint.setTargetName(binding.getURI());
endpoint.setSourceComponent(null); // TODO - fixed up at start
endpoint.setSourceComponentReference(promotedReference);
endpoint.setInterfaceContract(reference.getInterfaceContract());
endpoint.setSourceBinding(binding);
endpointsToCopyDown.add(endpoint);
}
}
}
if (bindingsToCopyDown.size() > 0) {
promotedReference.getBindings().clear();
promotedReference.getBindings().addAll(bindingsToCopyDown);
promotedReference.getEndpoints().clear();
promotedReference.getEndpoints().addAll(endpointsToCopyDown);
}
}
if (promotedReference.getBindings().size() > 1) {
warning(monitor, "ComponentReferenceMoreWire", promotedReference, promotedReference.getName());
}
} else {
// if necessary merge the promoted endpoints (and bindings) with the top level bindings
if (reference.getBindings().size() > 0 ){
for (Binding binding : reference.getBindings()) {
if ((!(binding instanceof OptimizableBinding)) || binding.getURI() != null) {
promotedReference.getBindings().add(binding);
if (reference instanceof ComponentReference){
for (Endpoint endpoint : ((ComponentReference)reference).getEndpoints()){
if ( endpoint.getSourceBinding() == binding){
promotedReference.getEndpoints().add(endpoint);
break;
}
}
} else {
// create a new endpoint to represent this promoted binding
Endpoint endpoint = endpointFactory.createEndpoint();
endpoint.setTargetName(binding.getURI());
endpoint.setSourceComponent(null); // TODO - fixed up at start
endpoint.setSourceComponentReference(promotedReference);
endpoint.setInterfaceContract(reference.getInterfaceContract());
endpoint.setSourceBinding(binding);
promotedReference.getEndpoints().add(endpoint);
}
}
}
}
}
Set<Binding> callbackBindings = new HashSet<Binding>();
if (promotedReference.getCallback() != null) {
callbackBindings.addAll(promotedReference.getCallback().getBindings());
}
if (reference.getCallback() != null) {
callbackBindings.addAll(reference.getCallback().getBindings());
}
promotedReference.setCallback(assemblyFactory.createCallback());
for (Binding binding : callbackBindings) {
if ((!(binding instanceof OptimizableBinding)) || binding.getURI() != null) {
promotedReference.getCallback().getBindings().add(binding);
}
}
}
}
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