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

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 * Copyright (C) 2001-2002 Jan Arne Petersen <jpetersen@uni-bonn.de>
 * Copyright (C) 2002 Benoit Cerrina <b.cerrina@wanadoo.fr>
 * Copyright (C) 2004-2005 Thomas E Enebo <enebo@acm.org>
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package org.jruby.ast;

import org.jruby.ast.types.IArityNode;
import org.jruby.lexer.yacc.ISourcePosition;
import org.jruby.runtime.Arity;

/**
 * Base class of any node which can be assigned to.
 */
public abstract class AssignableNode extends Node implements IArityNode {
    static final long serialVersionUID= 7997990944631594662L;
    
    private Node valueNode;
    
    public AssignableNode(ISourcePosition position, int id) {
        super(position, id);
    }
    
    /**
     * Gets the valueNode.
     * @return Returns a Node
     */
    public Node getValueNode() {
        return valueNode;
    }
    
    /**
     * Sets the valueNode.
     * @param valueNode The valueNode to set
     */
    public void setValueNode(Node valueNode) {
        this.valueNode = valueNode;
    }
    
    /**
     * Almost all assignables are only assigned a single value.
     */
    public Arity getArity() {
        return Arity.singleArgument();
    }
}