diff options
Diffstat (limited to 'sandbox/ant/sca/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/ReferenceConfigurationUtil.java')
| -rw-r--r-- | sandbox/ant/sca/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/ReferenceConfigurationUtil.java | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/sandbox/ant/sca/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/ReferenceConfigurationUtil.java b/sandbox/ant/sca/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/ReferenceConfigurationUtil.java new file mode 100644 index 0000000000..33611fb8c0 --- /dev/null +++ b/sandbox/ant/sca/trunk/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/ReferenceConfigurationUtil.java @@ -0,0 +1,209 @@ +/* + * 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.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) { + + // override the promoted endpoint references (and bindings) + // with configuration from the top level + + if (reference.getEndpointReferences().size() > 0){ + promotedReference.getEndpointReferences().clear(); + promotedReference.getEndpointReferences().addAll(reference.getEndpointReferences()); + } + + if (promotedReference.getEndpointReferences().size() > 1) { + warning(monitor, "ComponentReferenceMoreWire", promotedReference, promotedReference.getName()); + } + } else { + // merge the promoted endpoint reference with the those from the top level + if (reference.getEndpointReferences().size() > 0){ + promotedReference.getEndpointReferences().addAll(reference.getEndpointReferences()); + } + } + + 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); + } + } + } + +} |