diff options
Diffstat (limited to '')
-rw-r--r-- | sandbox/event/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/CompositeCloneBuilderImpl.java | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/sandbox/event/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/CompositeCloneBuilderImpl.java b/sandbox/event/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/CompositeCloneBuilderImpl.java new file mode 100644 index 0000000000..5779ddbc78 --- /dev/null +++ b/sandbox/event/modules/assembly/src/main/java/org/apache/tuscany/sca/assembly/builder/impl/CompositeCloneBuilderImpl.java @@ -0,0 +1,118 @@ +/* + * 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.Iterator; +import java.util.List; + +import org.apache.tuscany.sca.assembly.Component; +import org.apache.tuscany.sca.assembly.Composite; +import org.apache.tuscany.sca.assembly.Implementation; +import org.apache.tuscany.sca.assembly.builder.CompositeBuilder; +import org.apache.tuscany.sca.assembly.builder.CompositeBuilderException; +import org.apache.tuscany.sca.monitor.Monitor; + +/** + * A composite builder that clones nested composites. + * + * @version $Rev$ $Date$ + */ +public class CompositeCloneBuilderImpl implements CompositeBuilder { + + public CompositeCloneBuilderImpl(Monitor monitor) { + } + + public void build(Composite composite) throws CompositeBuilderException { + expandCompositeImplementations(composite); + } + + /** + * Expand composite component implementations. + * + * @param composite + * @param problems + */ + private void expandCompositeImplementations(Composite composite) { + for (Component component : composite.getComponents()) { + Implementation implementation = component.getImplementation(); + if (implementation instanceof Composite) { + + Composite compositeImplementation = (Composite)implementation; + Composite clone; + try { + clone = (Composite)compositeImplementation.clone(); + } catch (CloneNotSupportedException e) { + throw new RuntimeException(e); + } + component.setImplementation(clone); + expandCompositeImplementations(clone); + } + } + } + + /** + * Collect all nested composite implementations in a graph of composites. + * + * @param composite + * @param nested + */ + private void collectNestedComposites(Composite composite, List<Composite> nested) { + for (Component component : composite.getComponents()) { + Implementation implementation = component.getImplementation(); + if (implementation instanceof Composite) { + Composite nestedComposite = (Composite)implementation; + nested.add(nestedComposite); + collectNestedComposites(nestedComposite, nested); + } + } + } + + /** + * Fuse nested composites into a top level composite. + * + * @param composite + */ + private void fuseCompositeImplementations(Composite composite) { + + // First collect all nested composites + List<Composite> nested = new ArrayList<Composite>(); + collectNestedComposites(composite, nested); + + // Then add all the non-composite components they contain + for (Composite nestedComposite : nested) { + for (Component component: nestedComposite.getComponents()) { + Implementation implementation = component.getImplementation(); + if (!(implementation instanceof Composite)) { + composite.getComponents().add(component); + } + } + } + + // Clear the initial list of composite components + for (Iterator<Component> i = composite.getComponents().iterator(); i.hasNext();) { + Component component = i.next(); + if (component.getImplementation() instanceof Composite) { + i.remove(); + } + } + } + +} |