1 files changed, 100 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/builder/src/main/java/org/apache/tuscany/sca/builder/impl/CompositeCloneBuilderImpl.java b/sca-java-2.x/tags/2.0.1-RC1/modules/builder/src/main/java/org/apache/tuscany/sca/builder/impl/CompositeCloneBuilderImpl.java
new file mode 100644
index 0000000000..148a3b5368
--- /dev/null
+++ b/sca-java-2.x/tags/2.0.1-RC1/modules/builder/src/main/java/org/apache/tuscany/sca/builder/impl/CompositeCloneBuilderImpl.java
@@ -0,0 +1,100 @@
+/*
+ * 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.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.BuilderContext;
+import org.apache.tuscany.sca.assembly.builder.CompositeBuilder;
+import org.apache.tuscany.sca.assembly.builder.CompositeBuilderException;
+
+/**
+ * A composite builder that clones nested composites.
+ *
+ * @version $Rev$ $Date$
+ */
+public class CompositeCloneBuilderImpl implements CompositeBuilder {
+
+    public CompositeCloneBuilderImpl() {
+    }
+
+    public Composite build(Composite composite, BuilderContext context)
+        throws CompositeBuilderException {
+
+        if (Composite.DOMAIN_COMPOSITE.equals(composite.getName())) {
+            // Try to avoid clone for top-level composites that are added to the domain composite
+            for (Composite included : composite.getIncludes()) {
+                cloneIncludes(included);
+                cloneCompositeImplementations(included);
+            }
+        } else {
+            // Clone the includes 
+            cloneIncludes(composite);
+            cloneCompositeImplementations(composite);
+        }
+
+        return composite;
+    }
+
+    private void cloneIncludes(Composite composite) {
+        List<Composite> includes = new ArrayList<Composite>();
+        for (Composite included : composite.getIncludes()) {
+            try {
+                includes.add((Composite)included.clone());
+            } catch (CloneNotSupportedException e) {
+                throw new UnsupportedOperationException(e);
+            }
+        }
+        composite.getIncludes().clear();
+        composite.getIncludes().addAll(includes);
+    }
+
+    public String getID() {
+        return "org.apache.tuscany.sca.assembly.builder.CompositeCloneBuilder";
+    }
+
+    /**
+     * Clone composite component implementations
+     * 
+     * @param composite
+     * @param problems
+     */
+    private void cloneCompositeImplementations(Composite composite) {
+        for (Component component : composite.getComponents()) {
+            Implementation implementation = component.getImplementation();
+            if (implementation instanceof Composite) {
+
+                Composite compositeImplementation = (Composite)implementation;
+                try {
+                    // Please note the clone method is recursive
+                    Composite clone = (Composite)compositeImplementation.clone();
+                    component.setImplementation(clone);
+                } catch (CloneNotSupportedException e) {
+                    throw new UnsupportedOperationException(e);
+                }
+            }
+        }
+    }
+
+}