plugins/org.eclipse.dltk.ruby.core/jruby/org/jruby/ast/IterNode.java

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 * The contents of this file are subject to the Common Public
 * License Version 1.0 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
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 *
 * Software distributed under the License is distributed on an "AS
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 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * Copyright (C) 2001-2002 Jan Arne Petersen <jpetersen@uni-bonn.de>
 * Copyright (C) 2001-2002 Benoit Cerrina <b.cerrina@wanadoo.fr>
 * Copyright (C) 2002-2004 Anders Bengtsson <ndrsbngtssn@yahoo.se>
 * Copyright (C) 2004-2006 Thomas E Enebo <enebo@acm.org>
 * 
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package org.jruby.ast;

import java.util.List;

import org.jruby.ast.visitor.NodeVisitor;
import org.jruby.evaluator.Instruction;
import org.jruby.lexer.yacc.ISourcePosition;
import org.jruby.parser.StaticScope;
import org.jruby.runtime.ICallable;

/**
 * Represents a block.  
 *
 */
public class IterNode extends Node {
    static final long serialVersionUID = -9181965000180892184L;

    private final Node varNode;
    private final Node bodyNode;
    
    // What static scoping relationship exists when it comes into being.
    private StaticScope scope;
    
    private transient ICallable callable;

    public IterNode(ISourcePosition position, Node varNode, StaticScope scope, Node bodyNode) {
        this(position, varNode, scope, bodyNode, NodeTypes.ITERNODE);
    }
    
    public IterNode(ISourcePosition position, Node varNode, StaticScope scope, Node bodyNode, 
            int id) {
        super(position, id);
        this.varNode = varNode;
        this.scope = scope;
        this.bodyNode = bodyNode;
        
//        // if body and var are null, don't both with a heavyweight callable
//        if (bodyNode == null && varNode == null) {
//            callable = NilCallable.NIL_CALLABLE;
//        }
    }

    /**
     * Accept for the visitor pattern.
     * @param iVisitor the visitor
     **/
    public Instruction accept(NodeVisitor iVisitor) {
        return iVisitor.visitIterNode(this);
    }
    
    public StaticScope getScope() {
        return scope;
    }

    /**
     * Gets the bodyNode.
     * @return Returns a Node
     */
    public Node getBodyNode() {
        return bodyNode;
    }

    /**
     * Gets the varNode.
     * @return Returns a Node
     */
    public Node getVarNode() {
        return varNode;
    }
    
    public List childNodes() {
        return Node.createList(varNode, bodyNode);
    }

//    public ICallable getCallable() {
//        if (callable == null) {
//            callable = new EvaluateCallable(bodyNode, varNode);
//        }
//        
//        return callable;
//    }
}