1 files changed, 80 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/PassByValueInterceptor.java b/sca-java-2.x/tags/2.0.1-RC1/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/PassByValueInterceptor.java
new file mode 100644
index 0000000000..44e5072e61
--- /dev/null
+++ b/sca-java-2.x/tags/2.0.1-RC1/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/PassByValueInterceptor.java
@@ -0,0 +1,80 @@
+/*
+ * 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.core.databinding.wire;
+
+import org.apache.tuscany.sca.databinding.Mediator;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.invocation.Interceptor;
+import org.apache.tuscany.sca.invocation.InvocationChain;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.invocation.Message;
+
+/**
+ * Implementation of an interceptor that enforces pass-by-value semantics
+ * on operation invocations by copying the operation input and output data.
+ *
+ * @version $Rev$ $Date$
+ */
+public class PassByValueInterceptor implements Interceptor {
+
+    private Mediator mediator;
+    private Operation operation;
+    private Invoker nextInvoker;
+    private InvocationChain chain;
+
+    /**
+     * Constructs a new PassByValueInterceptor.
+     * @param dataBindings databinding extension point
+     * @param operation the intercepted operation
+     */
+    public PassByValueInterceptor(Mediator mediator, InvocationChain chain, Operation operation) {
+        this.mediator = mediator;
+        this.chain = chain;
+        this.operation = operation;
+    }
+
+    public Message invoke(Message msg) {
+        if (chain.allowsPassByReference()) {
+            return nextInvoker.invoke(msg);
+        }
+
+        msg.setBody(mediator.copyInput(msg.getBody(), operation));
+
+        Message resultMsg = nextInvoker.invoke(msg);
+
+        if (!resultMsg.isFault() && operation.getOutputType() != null) {
+            resultMsg.setBody(mediator.copyOutput(resultMsg.getBody(), operation));
+        }
+
+        if (resultMsg.isFault()) {
+            resultMsg.setFaultBody(mediator.copyFault(resultMsg.getBody(), operation));
+        }
+        return resultMsg;
+    }
+
+    public Invoker getNext() {
+        return nextInvoker;
+    }
+
+    public void setNext(Invoker next) {
+        this.nextInvoker = next;
+    }
+
+}