/**
 * Alipay.com Inc.
 * Copyright (c) 2004-2012 All Rights Reserved.
 */
package com.alipay.zdal.parser.sql.ast.expr;

import com.alipay.zdal.parser.sql.ast.SQLExprImpl;
import com.alipay.zdal.parser.sql.visitor.SQLASTVisitor;

/**
 * 
 * @author xiaoqing.zhouxq
 * @version $Id: SQLVariantRefExpr.java, v 0.1 2012-11-17 ����3:19:42 xiaoqing.zhouxq Exp $
 */
public class SQLVariantRefExpr extends SQLExprImpl {

    private static final long serialVersionUID = 1L;

    private String            name;

    private boolean           global           = false;

    private int               index            = -1;

    public SQLVariantRefExpr(String name) {
        this.name = name;
    }

    public SQLVariantRefExpr(String name, boolean global) {
        this.name = name;
        this.global = global;
    }

    public SQLVariantRefExpr() {

    }

    public int getIndex() {
        return index;
    }

    public void setIndex(int index) {
        this.index = index;
    }

    public String getName() {
        return this.name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public void output(StringBuffer buf) {
        buf.append(this.name);
    }

    @Override
    protected void accept0(SQLASTVisitor visitor) {
        visitor.visit(this);

        visitor.endVisit(this);
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((name == null) ? 0 : name.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (!(obj instanceof SQLVariantRefExpr)) {
            return false;
        }
        SQLVariantRefExpr other = (SQLVariantRefExpr) obj;
        if (name == null) {
            if (other.name != null) {
                return false;
            }
        } else if (!name.equals(other.name)) {
            return false;
        }
        return true;
    }

    public boolean isGlobal() {
        return global;
    }

    public void setGlobal(boolean global) {
        this.global = global;
    }

}