1 files changed, 133 insertions, 0 deletions
diff --git a/sandbox/mobile-android/tuscany-implementation-java-runtime/src/main/java/org/apache/tuscany/sca/implementation/java/invocation/JavaImplementationInvoker.java b/sandbox/mobile-android/tuscany-implementation-java-runtime/src/main/java/org/apache/tuscany/sca/implementation/java/invocation/JavaImplementationInvoker.java
new file mode 100644
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+++ b/sandbox/mobile-android/tuscany-implementation-java-runtime/src/main/java/org/apache/tuscany/sca/implementation/java/invocation/JavaImplementationInvoker.java
@@ -0,0 +1,133 @@
+/*
+ * 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.implementation.java.invocation;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+import org.apache.tuscany.sca.core.context.InstanceWrapper;
+import org.apache.tuscany.sca.core.scope.Scope;
+import org.apache.tuscany.sca.core.scope.ScopeContainer;
+import org.apache.tuscany.sca.core.scope.ScopedRuntimeComponent;
+import org.apache.tuscany.sca.implementation.java.JavaImplementation;
+import org.apache.tuscany.sca.interfacedef.ConversationSequence;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.invocation.Message;
+import org.apache.tuscany.sca.invocation.DataExchangeSemantics;
+import org.apache.tuscany.sca.runtime.EndpointReference;
+import org.apache.tuscany.sca.runtime.ReferenceParameters;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+
+/**
+ * Responsible for synchronously dispatching an invocation to a Java component
+ * implementation instance
+ * 
+ * @version $Rev: 634778 $ $Date: 2008-03-07 10:58:16 -0800 (Fri, 07 Mar 2008) $
+ */
+public class JavaImplementationInvoker implements Invoker, DataExchangeSemantics {
+    protected Operation operation;
+    protected Method method;
+    protected boolean allowsPBR;
+
+    @SuppressWarnings("unchecked")
+    protected final ScopeContainer scopeContainer;
+
+    public JavaImplementationInvoker(Operation operation, Method method, RuntimeComponent component) {
+        assert method != null : "Operation method cannot be null";
+        this.method = method;
+        this.operation = operation;
+        this.scopeContainer = ((ScopedRuntimeComponent)component).getScopeContainer();
+        this.allowsPBR = ((JavaImplementation)component.getImplementation()).isAllowsPassByReference(method);
+    }
+
+    @SuppressWarnings("unchecked")
+    public Message invoke(Message msg) {
+        Operation op = msg.getOperation();
+        if (op == null) {
+            op = this.operation;
+        }
+        ConversationSequence sequence = op.getConversationSequence();
+        Object payload = msg.getBody();
+
+        Object contextId = null;
+
+        EndpointReference from = msg.getFrom();
+        ReferenceParameters parameters = null;
+        if (from != null) {
+            parameters = from.getReferenceParameters();
+        }
+        // check what sort of context is required
+        if (scopeContainer != null) {
+            Scope scope = scopeContainer.getScope();
+            if (scope == Scope.REQUEST) {
+                contextId = Thread.currentThread();
+            } else if (scope == Scope.CONVERSATION && parameters != null) {
+                contextId = parameters.getConversationID();
+            }
+        }
+
+        try {
+            // The following call might create a new conversation, as a result, the msg.getConversationID() might 
+            // return a new value
+            InstanceWrapper wrapper = scopeContainer.getWrapper(contextId);
+
+            // detects whether the scope container has created a conversation Id. This will
+            // happen in the case that the component has conversational scope but only the
+            // callback interface is conversational. Or in the callback case if the service interface
+            // is conversational and the callback interface isn't. If we are in this situation we need
+            // to get the contextId of this component and remove it after we have invoked the method on 
+            // it. It is possible that the component instance will not go away when it is removed below 
+            // because a callback conversation will still be holding a reference to it
+            boolean removeTemporaryConversationalComponentAfterCall = false;
+            if (parameters != null && (contextId == null) && (parameters.getConversationID() != null)) {
+                contextId = parameters.getConversationID();
+                removeTemporaryConversationalComponentAfterCall = true;
+            }
+
+            Object instance = wrapper.getInstance();
+            Object ret;
+            if (payload != null && !payload.getClass().isArray()) {
+                ret = method.invoke(instance, payload);
+            } else {
+                ret = method.invoke(instance, (Object[])payload);
+            }
+
+            scopeContainer.returnWrapper(wrapper, contextId);
+
+            if ((sequence == ConversationSequence.CONVERSATION_END) || (removeTemporaryConversationalComponentAfterCall)) {
+                // if end conversation, or we have the special case where a conversational
+                // object was created to service the stateless half of a stateful component
+                scopeContainer.remove(contextId);
+                parameters.setConversationID(null);
+            }
+            msg.setBody(ret);
+        } catch (InvocationTargetException e) {
+            msg.setFaultBody(e.getCause());
+        } catch (Exception e) {
+            msg.setFaultBody(e);
+        }
+        return msg;
+    }
+
+    public boolean allowsPassByReference() {
+        return allowsPBR;
+    }
+
+}