/*
 * This software is distributed under following license based on modified BSD
 * style license.
 * ----------------------------------------------------------------------
 * 
 * Copyright 2009 The Nimbus2 Project. All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer. 
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE NIMBUS PROJECT ``AS IS'' AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
 * NO EVENT SHALL THE NIMBUS PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 * The views and conclusions contained in the software and documentation are
 * those of the authors and should not be interpreted as representing official
 * policies, either expressed or implied, of the Nimbus2 Project.
 */
package jp.ossc.nimbus.service.aop;

import java.lang.reflect.*;
import java.io.*;

/**
 * {@link MethodInvocationContext}のデフォルト実装クラス。<p>
 * 
 * @author M.Takata
 */
public class DefaultMethodInvocationContext extends DefaultInvocationContext
 implements MethodInvocationContext, java.io.Serializable{
    
    private static final long serialVersionUID = 7148580138244485932L;
    
    /**
     * 呼び出し対象のメソッド。<p>
     */
    protected transient Method targetMethod;
    
    /**
     * 呼び出し対象のメソッド引数。<p>
     */
    protected Object[] parameters;
    
    /**
     * 空の呼び出しコンテキストを生成する。<p>
     */
    public DefaultMethodInvocationContext(){
    }
    
    /**
     * メソッド呼び出しコンテキストを生成する。<p>
     *
     * @param target 呼び出し対象のオブジェクト
     * @param method 呼び出し対象のメソッド
     * @param params 呼び出し対象のメソッド引数
     */
    public DefaultMethodInvocationContext(
        Object target,
        Method method,
        Object[] params
    ){
        super(target);
        targetMethod = method;
        parameters = params;
    }
    
    // MethodInvocationContextのJavaDoc
    @Override
    public Method getTargetMethod(){
        return targetMethod;
    }
    
    // MethodInvocationContextのJavaDoc
    @Override
    public void setTargetMethod(Method method){
        targetMethod = method;
    }
    
    // MethodInvocationContextのJavaDoc
    @Override
    public Object[] getParameters(){
        return parameters;
    }
    
    // MethodInvocationContextのJavaDoc
    @Override
    public void setParameters(Object[] params){
        parameters = params;
    }
    
    @Override
    public String toString(){
        final StringBuilder buf = new StringBuilder(getClass().getName());
        buf.append('@').append(Integer.toHexString(hashCode()));
        buf.append('{');
        buf.append("target=").append(getTargetObject());
        buf.append(',').append("targetMethod=").append(getTargetMethod());
        buf.append(',').append("parameters=(");
        final Object[] params = getParameters();
        if(params != null){
            for(int i = 0; i < params.length; i++){
                buf.append(params[i]);
                if(i != params.length - 1){
                    buf.append(',');
                }
            }
        }
        buf.append(')');
        buf.append('}');
        return buf.toString();
    }
    
    private void writeObject(ObjectOutputStream out) throws IOException{
        out.defaultWriteObject();
        if(targetMethod == null){
            out.writeObject(null);
        }else{
            out.writeObject(new SerializableMethod(targetMethod));
        }
    }
    
    private void readObject(ObjectInputStream in)
     throws IOException, ClassNotFoundException{
        in.defaultReadObject();
        SerializableMethod smethod = (SerializableMethod)in.readObject();
        if(smethod != null){
            targetMethod = smethod.getMethod();
        }
    }
}