/*
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 * The contents of this file are subject to the Eclipse Public
 * License Version 2.0 (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 Anders Bengtsson <ndrsbngtssn@yahoo.se>
 * Copyright (C) 2004 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.lexer.yacc.ISourcePosition;

A Case statement.  Represents a complete case statement, including the body with its
when statements.
/**
 * A Case statement.  Represents a complete case statement, including the body with its
 * when statements.
 */
public class CaseNode extends Node {
	
the case expression.
/**
	 * the case expression.
	 **/
    private final Node caseNode;
	
A list of all choices including else
/**
	 * A list of all choices including else
	 */
    private final ListNode cases;
    private Node elseNode = null;
    
    public CaseNode(ISourcePosition position, Node caseNode, ListNode cases) {
        super(position, caseNode != null && caseNode.containsVariableAssignment() || cases.containsVariableAssignment());
        
        assert cases != null : "caseBody is not null";
        // TODO: Rewriter and compiler assume case when empty expression.  In MRI this is just
        // a when.
//        assert caseNode != null : "caseNode is not null";
        
        this.caseNode = caseNode;
        this.cases = cases;
    }

    public void setElseNode(Node elseNode) {
        this.elseNode = elseNode;
    }

    public NodeType getNodeType() {
        return NodeType.CASENODE;
    }

 	
Accept for the visitor pattern.
Params:
iVisitor – the visitor/**
     * Accept for the visitor pattern.
     * @param iVisitor the visitor
     **/
    public <T> T accept(NodeVisitor<T> iVisitor) {
        return iVisitor.visitCaseNode(this);
    }

    
Gets the caseNode.
caseNode is the case expression 
Returns:
caseNode/**
     * Gets the caseNode.
	 * caseNode is the case expression 
     * @return caseNode
     */
    public Node getCaseNode() {
        return caseNode;
    }
    
    public ListNode getCases() {
        return cases;
    }

    public Node getElseNode() {
        return elseNode;
    }
    
    public List<Node> childNodes() {
        return Node.createList(caseNode, cases);
    }

}