fieldnode.java

大名鼎鼎的java动态脚本语言。已经通过了sun的认证

/*
 $Id: FieldNode.java,v 1.18 2006/01/19 00:06:51 blackdrag Exp $

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

 Redistribution and use of this software and associated documentation
 ("Software"), with or without modification, are permitted provided
 that the following conditions are met:

 1. Redistributions of source code must retain copyright
    statements and notices.  Redistributions must also contain a
    copy of this document.

 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.

 3. The name "groovy" must not be used to endorse or promote
    products derived from this Software without prior written
    permission of The Codehaus.  For written permission,
    please contact [e-mail].

 4. Products derived from this Software may not be called "groovy"
    nor may "groovy" appear in their names without prior written
    permission of The Codehaus. "groovy" is a registered
    trademark of The Codehaus.

 5. Due credit should be given to The Codehaus -
    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
 THE CODEHAUS OR ITS 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,
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 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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 */
package org.codehaus.groovy.ast;

import java.lang.reflect.Field;

import org.codehaus.groovy.ast.expr.Expression;
import org.objectweb.asm.Opcodes;

/**
 * Represents a field (member variable)
 * 
 * @author <a href="mailto:[e-mail]">James Strachan</a>
 * @version $Revision: 1.18 $
 */
public class FieldNode extends AnnotatedNode implements Opcodes, Variable {

    private String name;
    private int modifiers;
    private ClassNode type;
    private ClassNode owner;
    private Expression initialValueExpression;
    private boolean dynamicTyped;
    private boolean holder;
    private boolean closureShare = false;

    public static FieldNode newStatic(Class theClass, String name) throws SecurityException, NoSuchFieldException {
        Field field = theClass.getField(name);
        ClassNode fldType = ClassHelper.make(field.getType());
        return new FieldNode(name, ACC_PUBLIC | ACC_STATIC, fldType, ClassHelper.make(theClass), null);
    }

    public FieldNode(String name, int modifiers, ClassNode type, ClassNode owner, Expression initialValueExpression) {
        this.name = name;
        this.modifiers = modifiers;
        this.type = type;
        if (this.type==ClassHelper.DYNAMIC_TYPE && initialValueExpression!=null) this.setType(initialValueExpression.getType());
        this.setType(type);
        this.owner = owner;
        this.initialValueExpression = initialValueExpression;
    }

    public Expression getInitialExpression() {
        return initialValueExpression;
    }

    public int getModifiers() {
        return modifiers;
    }

    public String getName() {
        return name;
    }

    public ClassNode getType() {
        return type;
    }

    public void setType(ClassNode type) {
        this.type = type;
        dynamicTyped |= type==ClassHelper.DYNAMIC_TYPE;
    }
    
    public ClassNode getOwner() {
        return owner;
    }

    public boolean isHolder() {
        return holder;
    }

    public void setHolder(boolean holder) {
        this.holder = holder;
    }

    public boolean isDynamicTyped() {
        return dynamicTyped;
    }

    public void setModifiers(int modifiers) {
        this.modifiers = modifiers;
    }

    /**
     * @return true if the field is static
     */
    public boolean isStatic() {
        return (modifiers & ACC_STATIC) != 0;
    }
	/**
	 * @param owner The owner to set.
	 */
	public void setOwner(ClassNode owner) {
		this.owner = owner;
	}

    public boolean hasInitialExpression() {
        return initialValueExpression!=null;
    }

    public boolean isInStaticContext() {
        return isStatic();
    }
    public Expression getInitialValueExpression() {
        return initialValueExpression;
    }
    public void setInitialValueExpression(Expression initialValueExpression) {
        this.initialValueExpression = initialValueExpression;
    }

    public boolean isClosureSharedVariable() {
        return false;
    }
    
    public void setClosureSharedVariable(boolean inClosure) {
        closureShare = inClosure;        
    }
}