abstracterrorinforinexpr.java

<算法导论>第二版大部分算法实现. 1. 各类排序和顺序统计学相关 2. 数据结构 2.1 基本数据结构 2.2 散列表 2.3 二叉查找树 2.4 红黑树 2.5 数据结构

/*
 * Copyright (C) 2003-2008 Wang Pengcheng <[e-mail]>
 * Permission is granted to copy, distribute and/or modify this
 * document under the terms of the GNU Free Documentation License,
 * Version 2.0 or any later version published by the Free Software Foundation;
 * with no Invariant Sections.
 * You may obtain a copy of the License at
 *   http://www.gnu.org/licenses/lgpl.txt
 */
//1 Mar 2008
package cn.edu.whu.iss.algorithm.unit10.expression.structure;

public abstract class AbstractErrorInforInExpr implements
		ErrorInforInExpression {

	public static final int LEFT_BRACKET_ERROR = 0;
	public static final int RIGHT_BRACKET_ERROR = 1;
	public static final int OPERATOR_USE_ERROR = 2;
	
	public static final String LEFT_BRACKET_MESSAGE = "Syntax error, insert \")\" to complete Expression";
	public static final String RIGHT_BRACKET_MESSAGE  = "Syntax error, insert \"(\" to complete Expression";
	public static final String OPERATOR_USE_MESSAGE  = "Syntax error, check the expression operator in the left";
	
	public static final String[] ERROR_MESSAGE = {
		LEFT_BRACKET_MESSAGE,RIGHT_BRACKET_MESSAGE,OPERATOR_USE_MESSAGE
	};
	
	public static final String getErrorMessage(int id){
		if(id<0||id>=ERROR_MESSAGE.length){
			return null;
		};
		return ERROR_MESSAGE[id];
	}
	
	protected int index;
	protected int errorId;

	public AbstractErrorInforInExpr(int index, int errorId) {
		super();
		this.index = index;
		this.errorId = errorId;
	}

	public AbstractErrorInforInExpr() {
		super();
	}
	
	public int compareTo(ErrorInforInExpression o) {
		return this.index-o.getErrorLocation();
	}

}