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simple expression language implementation

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package com.alibaba.simpleEL.dialect.tiny.ast;

import com.alibaba.simpleEL.dialect.tiny.visitor.TinyELAstVisitor;

public class TinyELVariantRefExpr extends TinyELExpr {
    private String name;

    public TinyELVariantRefExpr() {

    }

    public TinyELVariantRefExpr(String name) {
        if (name.startsWith("@@")) {
            this.name = name;
        } else if (name.startsWith("@")) {
            name = name.substring(1);
            this.name = name;
        } else {
            this.name = name;
        }
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        if (name.startsWith("@@")) {
            this.name = name;
        } else if (name.startsWith("@")) {
            name = name.substring(1);
            this.name = name;
        } else {
            this.name = name;
        }
    }

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

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

        visitor.endVisit(this);
    }
}