constantmethodbinding.java

一个虚拟训练系统.主要使用j2ee框架实现.

package com.jsfcompref.trainer.components;

/*
 * Copyright 2004 Sun Microsystems, Inc. All Rights Reserved.
 * 
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 * without modification, are permitted provided that the following
 * conditions are met:
 * 
 * - Redistributions of source code must retain the above copyright
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 * 
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 *   provided with the distribution.
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 * Neither the name of Sun Microsystems, Inc. or the names of
 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 *  
 * This software is provided "AS IS," without a warranty of any
 * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
 * EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY
 * DAMAGES OR LIABILITIES SUFFERED BY LICENSEE AS A RESULT OF OR
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import javax.faces.component.StateHolder;
import javax.faces.context.FacesContext;
import javax.faces.el.MethodBinding;

public class ConstantMethodBinding extends MethodBinding
    implements StateHolder {

    private String outcome = null;


    public ConstantMethodBinding() {
    }


    public ConstantMethodBinding(String yourOutcome) {
        outcome = yourOutcome;
    }


    public Object invoke(FacesContext context, Object params[]) {
        return outcome;
    }


    public Class getType(FacesContext context) {
        return String.class;
    }

    // ----------------------------------------------------- StateHolder Methods

    public Object saveState(FacesContext context) {
        return outcome;
    }


    public void restoreState(FacesContext context, Object state) {
        outcome = (String) state;
    }


    private boolean transientFlag = false;


    public boolean isTransient() {
        return (this.transientFlag);
    }


    public void setTransient(boolean transientFlag) {
        this.transientFlag = transientFlag;
    }
}