castexpression.java

来自「Groovy动态语言 运行在JVM中的动态语言 可以方便的处理业务逻辑变化大的业」· Java 代码 · 共 119 行

/*
 $Id: CastExpression.java 3982 2006-08-14 20:18:35Z blackdrag $

 Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.

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 ("Software"), with or without modification, are permitted provided
 that the following conditions are met:

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    statements and notices.  Redistributions must also contain a
    copy of this document.

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    above copyright notice, this list of conditions and the
    following disclaimer in the documentation and/or other
    materials provided with the distribution.

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    products derived from this Software without prior written
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    please contact [e-mail].

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    http://groovy.codehaus.org/

 THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
 ``AS IS'' AND ANY EXPRESSED 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
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 */
package org.codehaus.groovy.ast.expr;

import org.codehaus.groovy.ast.ClassNode;
import org.codehaus.groovy.ast.GroovyCodeVisitor;

/**
 * Represents a type cast expression
 * 
 * @author <a href="mailto:[e-mail]">James Strachan</a>
 * @version $Revision: 3982 $
 */
public class CastExpression extends Expression {
    
    private Expression expression;
    private boolean ignoreAutoboxing=false;
    private boolean coerce = false;

    public static CastExpression asExpression(ClassNode type, Expression expression) {
        CastExpression answer = new CastExpression(type, expression);
        answer.setCoerce(true);
        return answer;
    }

    public CastExpression(ClassNode type, Expression expression) {
        this(type,expression,false);
    }

    public CastExpression(ClassNode type, Expression expression, boolean ignoreAutoboxing) {
        super.setType(type);
        this.expression = expression;
        this.ignoreAutoboxing = ignoreAutoboxing;
    }
    
    public boolean isIgnoringAutoboxing(){
        return ignoreAutoboxing;
    }

    public boolean isCoerce() {
        return coerce;
    }

    public void setCoerce(boolean coerce) {
        this.coerce = coerce;
    }

    public String toString() {
        return super.toString() +"[(" + getType().getName() + ") " + expression + "]";
    }

    public void visit(GroovyCodeVisitor visitor) {
        visitor.visitCastExpression(this);
    }

    public Expression transformExpression(ExpressionTransformer transformer) {
        CastExpression ret =  new CastExpression(getType(), transformer.transform(expression));
        ret.setSourcePosition(this);
        ret.setCoerce(this.isCoerce());
        return ret;
    }
    
    public String getText() {
        return "(" + getType() + ") " + expression.getText();
    }
 
    public Expression getExpression() {
        return expression;
    }
    
    public void setType(ClassNode t) {
        super.setType(t);
    }

}