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Diffstat (limited to 'tags/java/sca/2.0-M4-RC1/modules/builder/src/main/java/org/apache/tuscany/sca/builder/impl/ReferenceConfigurationUtil.java')
| -rw-r--r-- | tags/java/sca/2.0-M4-RC1/modules/builder/src/main/java/org/apache/tuscany/sca/builder/impl/ReferenceConfigurationUtil.java | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/tags/java/sca/2.0-M4-RC1/modules/builder/src/main/java/org/apache/tuscany/sca/builder/impl/ReferenceConfigurationUtil.java b/tags/java/sca/2.0-M4-RC1/modules/builder/src/main/java/org/apache/tuscany/sca/builder/impl/ReferenceConfigurationUtil.java new file mode 100644 index 0000000000..67b143e95d --- /dev/null +++ b/tags/java/sca/2.0-M4-RC1/modules/builder/src/main/java/org/apache/tuscany/sca/builder/impl/ReferenceConfigurationUtil.java @@ -0,0 +1,216 @@ +/* + * 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.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.EndpointReference; +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.assembly.builder.Messages; +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(), + Messages.ASSEMBLY_VALIDATION, + 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 || overridenMul == Multiplicity.ONE_ONE + || overridenMul == Multiplicity.ONE_N; + case ONE_N: + return overridenMul == Multiplicity.ONE_ONE; + case ZERO_ONE: + return overridenMul == Multiplicity.ONE_ONE; + default: + return false; + } + } else { + return true; + } + } + + static boolean validateMultiplicityAndTargets(Multiplicity multiplicity, List<EndpointReference> endpointReferences) { + + // In some tests multiplicity is not set + if (multiplicity == null) { + return true; + } + + // Count targets + int count = endpointReferences.size(); + + switch (multiplicity) { + case ZERO_N: + break; + case ZERO_ONE: + if (count > 1) { + return false; + } + break; + case ONE_ONE: + if (count != 1) { + return false; + } + break; + case ONE_N: + if (count < 1) { + 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 - the outer level reference + * @param promotedReference - the inner level promoted reference + */ + static void reconcileReferenceBindings(Reference reference, + ComponentReference promotedReference, + AssemblyFactory assemblyFactory, + Monitor monitor) { + + if (reference.getEndpointReferences().size() > 0) { + if (promotedReference.getMultiplicity() == Multiplicity.ONE_ONE || promotedReference.getMultiplicity() == Multiplicity.ZERO_ONE) { + // Override any existing wires for 0..1 and 1..1 multiplicity + promotedReference.getEndpointReferences().clear(); + // For 0..1 and 1..1, there should not be more than 1 endpoint reference + if (reference.getEndpointReferences().size() > 1) { + warning(monitor, "ComponentReferenceMoreWire", promotedReference, promotedReference.getName()); + } // end if + } // end if + // Clone the EndpointReferences from the outer level and add to the promoted reference + for (EndpointReference epRef : reference.getEndpointReferences()) { + EndpointReference epRefClone = copyHigherReference(epRef, promotedReference); + promotedReference.getEndpointReferences().add(epRefClone); + } // end for + } // end if + + 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); + } // end if + } // end for + } // end method reconcileReferenceBindings + + /** + * Copy a higher level EndpointReference down to a lower level reference which it promotes + * @param epRef - the endpoint reference + * @param promotedReference - the promoted reference + * @return - a copy of the EndpointReference with data merged from the promoted reference + */ + private static EndpointReference copyHigherReference(EndpointReference epRef, ComponentReference promotedReference) { + EndpointReference epRefClone = null; + try { + epRefClone = (EndpointReference)epRef.clone(); + } catch (Exception e) { + // Ignore (we know that EndpointReference2 can be cloned) + } // end try + // Copy across details of the inner reference + ComponentReference ref = epRefClone.getReference(); + //FIXME + epRefClone.setReference(promotedReference); + return epRefClone; + } // end copyHigherReference + +} // end class |