/*
* 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 org.apache.tuscany.spi.model.Operation;
import org.apache.tuscany.spi.wire.Interceptor;
import org.apache.tuscany.spi.wire.InvocationChain;
import org.apache.tuscany.spi.wire.TargetInvoker;
/**
* Contains functionality common to source- and target- side invocation chains
*
* @version $Rev: 441749 $ $Date: 2006-09-08 23:55:02 -0700 (Fri, 08 Sep 2006) $
*/
public abstract class InvocationChainImpl implements InvocationChain {
protected Operation operation;
protected TargetInvoker targetInvoker;
protected Interceptor interceptorChainHead;
protected Interceptor interceptorChainTail;
// the pointer to a bridged target head interceptor or null if the target has no interceptors
protected Interceptor targetInterceptorChainHead;
public InvocationChainImpl(Operation operation) {
assert operation != null : "No operation type specified";
this.operation = operation;
}
public Operation getOperation() {
return operation;
}
public void setTargetInvoker(TargetInvoker invoker) {
this.targetInvoker = invoker;
}
public TargetInvoker getTargetInvoker() {
return targetInvoker;
}
public void addInterceptor(Interceptor interceptor) {
if (interceptorChainHead == null) {
interceptorChainHead = interceptor;
} else {
interceptorChainTail.setNext(interceptor);
}
interceptorChainTail = interceptor;
}
public void addInterceptor(int index, Interceptor interceptor) {
int i = 0;
Interceptor next = interceptorChainHead;
Interceptor prev = null;
while (next != null && i < index) {
prev = next;
next = next.getNext();
i++;
}
if (i == index) {
if (prev != null) {
prev.setNext(interceptor);
} else {
interceptorChainHead = interceptor;
}
interceptor.setNext(next);
if (next == null) {
interceptorChainTail = interceptor;
}
} else {
throw new ArrayIndexOutOfBoundsException(index);
}
}
public Interceptor getHeadInterceptor() {
return interceptorChainHead;
}
public Interceptor getTailInterceptor() {
return interceptorChainTail;
}
public void setTargetInterceptor(Interceptor interceptor) {
targetInterceptorChainHead = interceptor;
}
public Interceptor getTargetInterceptor() {
return targetInterceptorChainHead;
}
}