scriptella.core.ElementInterceptor Maven / Gradle / Ivy
/*
* Copyright 2006-2012 The Scriptella Project Team.
*
* 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 scriptella.core;
/**
* Base class for executable elements interceptors.
* Based on Chain-Of-Responsibility (GOF CoR) pattern.
*
The purpose of this class is to provide an AOP-style approach for adding additional functionality.
*
* @author Fyodor Kupolov
* @version 1.0
* @see DynamicContextDecorator
*/
public abstract class ElementInterceptor implements ExecutableElement {
private ExecutableElement next;
private DynamicContextDecorator ctxDecorator;
protected ElementInterceptor(ExecutableElement next) {
this.next = next;
}
protected ElementInterceptor(ExecutableElement next,
DynamicContextDecorator ctxDecorator) {
this.next = next;
this.ctxDecorator = ctxDecorator;
}
protected DynamicContextDecorator getCtxDecorator() {
return ctxDecorator;
}
protected ExecutableElement getNext() {
return next;
}
/**
* Executes next element in the chain.
* @param ctx dynamic context.
* @see ExecutableElement#execute(DynamicContext)
*/
protected void executeNext(final DynamicContext ctx) {
getNext().execute(ctx);
}
}