/*
* 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.core.wire;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Set;
import org.apache.tuscany.spi.component.TargetException;
import org.apache.tuscany.spi.wire.InvocationRuntimeException;
import org.apache.tuscany.spi.wire.Message;
import org.apache.tuscany.spi.wire.TargetInvoker;
import static org.apache.tuscany.core.util.JavaIntrospectionHelper.findClosestMatchingMethod;
import static org.apache.tuscany.core.util.JavaIntrospectionHelper.getAllUniquePublicProtectedMethods;
/**
* Base class for dispatching to a Java based component implementation. Subclasses implement a strategy for resolving
* implementation instances.
*
* @version $Rev: 443468 $ $Date: 2006-09-14 13:56:03 -0700 (Thu, 14 Sep 2006) $
*/
public abstract class PojoTargetInvoker implements TargetInvoker {
protected Method operation;
protected boolean cacheable;
public PojoTargetInvoker(Method operation) {
assert operation != null : "Operation method cannot be null";
this.operation = operation;
}
public Object invokeTarget(final Object payload) throws InvocationTargetException {
try {
Object instance = getInstance();
if (!operation.getDeclaringClass().isInstance(instance)) {
Set<Method> methods = getAllUniquePublicProtectedMethods(instance.getClass());
Method newOperation = 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) throws InvocationRuntimeException {
try {
Object resp = invokeTarget(msg.getBody());
msg.setBody(resp);
} catch (InvocationTargetException e) {
msg.setBodyWithFault(e.getCause());
} catch (Throwable e) {
msg.setBodyWithFault(e);
}
return msg;
}
public boolean isCacheable() {
return cacheable;
}
public void setCacheable(boolean cacheable) {
this.cacheable = cacheable;
}
public boolean isOptimizable() {
return isCacheable(); // we only need to check if the scopes are correct
}
@Override
public PojoTargetInvoker clone() throws CloneNotSupportedException {
try {
PojoTargetInvoker clone = (PojoTargetInvoker) super.clone();
clone.operation = this.operation;
return clone;
} catch (CloneNotSupportedException e) {
return null; // will not happen
}
}
protected abstract Object getInstance() throws TargetException;
}