1 files changed, 92 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/java-stable-20060304/sca/container.java/src/main/java/org/apache/tuscany/container/java/invocation/AbstractJavaComponentInvoker.java b/sca-java-1.x/tags/java-stable-20060304/sca/container.java/src/main/java/org/apache/tuscany/container/java/invocation/AbstractJavaComponentInvoker.java
new file mode 100644
index 0000000000..0109416e75
--- /dev/null
+++ b/sca-java-1.x/tags/java-stable-20060304/sca/container.java/src/main/java/org/apache/tuscany/container/java/invocation/AbstractJavaComponentInvoker.java
@@ -0,0 +1,92 @@
+/**
+ *
+ *  Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
+ *
+ *  Licensed 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.container.java.invocation;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.Set;
+
+import org.apache.tuscany.core.config.JavaIntrospectionHelper;
+import org.apache.tuscany.core.context.TargetException;
+import org.apache.tuscany.core.invocation.Interceptor;
+import org.apache.tuscany.core.invocation.InvocationRuntimeException;
+import org.apache.tuscany.core.invocation.TargetInvoker;
+import org.apache.tuscany.core.message.Message;
+
+/**
+ * Base class for dispatching to a Java based component implementation. Subclasses implement a strategy for resolving
+ * implementation instances.
+ * 
+ * @version $Rev$ $Date$
+ */
+public abstract class AbstractJavaComponentInvoker implements TargetInvoker {
+
+    protected Method operation;
+
+    public AbstractJavaComponentInvoker(Method operation) {
+        assert (operation != null) : "Operation method cannot be null";
+        this.operation = operation;
+    }
+
+    public Object invokeTarget(Object payload) throws InvocationTargetException {
+        try {
+            Object instance = getInstance();
+            if (!operation.getDeclaringClass().isInstance(instance)) {
+                Set methods = JavaIntrospectionHelper.getAllUniqueMethods(instance.getClass());
+                Method newOperation = JavaIntrospectionHelper.findClosestMatchingMethod(operation.getName(), operation
+                        .getParameterTypes(), methods);
+                if (newOperation != null)
+                    operation = newOperation;
+            }
+            if (payload != null && !payload.getClass().isArray()) {
+                return operation.invoke(instance, payload);
+            } else {
+                return operation.invoke(instance, (Object[]) payload);
+            }
+        } catch (IllegalAccessException e) {
+            throw new InvocationRuntimeException(e);
+        }
+    }
+
+    public Message invoke(Message msg) {
+        try {
+            Object resp = invokeTarget(msg.getBody());
+            msg.setBody(resp);
+        } catch (InvocationTargetException e) {
+            msg.setBody(e.getCause());
+        } catch (Throwable e) {
+            msg.setBody(e);
+        }
+        return msg;
+    }
+
+    protected abstract Object getInstance() throws TargetException;
+
+    public void setNext(Interceptor next) {
+        throw new IllegalStateException("This interceptor must be the last interceptor in an interceptor chain");
+    }
+
+    public Object clone(){
+        try {
+            AbstractJavaComponentInvoker clone = (AbstractJavaComponentInvoker) super.clone();
+            clone.operation = this.operation;
+            return clone;
+        } catch (CloneNotSupportedException e) {
+            return null; // will not happen
+        }
+    }
+}