/*

***** BEGIN LICENSE BLOCK *****

* Version: EPL 1.0/GPL 2.0/LGPL 2.1

*

* The contents of this file are subject to the Eclipse 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

* the License at http://www.eclipse.org/legal/epl-v10.html

*

* Software distributed under the License is distributed on an "AS

* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or

* 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>

*

* Alternatively, the contents of this file may be used under the terms of

* either of the GNU General Public License Version 2 or later (the "GPL"),

* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),

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package org.jruby.ast;

import java.util.List;

import org.jruby.Ruby;

import org.jruby.RubyClass;

import org.jruby.RubyModule;

import org.jruby.ast.visitor.NodeVisitor;

import org.jruby.evaluator.ASTInterpreter;

import org.jruby.lexer.yacc.ISourcePosition;

import org.jruby.parser.StaticScope;

import org.jruby.runtime.Block;

import org.jruby.runtime.ThreadContext;

import org.jruby.runtime.builtin.IRubyObject;

/**

* A class statement (name, superClass, body). Classes bodies also define their own scope.

*/

public class ClassNode extends Node implements IScopingNode {

private final Colon3Node cpath;

private final StaticScope scope;

private final Node bodyNode;

private final Node superNode;

public ClassNode(ISourcePosition position, Colon3Node cpath, StaticScope scope, Node bodyNode, Node superNode) {

super(position);

assert cpath != null : "cpath is not null";

assert scope != null : "scope is not null";

assert bodyNode != null : "bodyNode is not null";

this.cpath = cpath;

this.scope = scope;

this.bodyNode = bodyNode;

this.superNode = superNode;

}

public NodeType getNodeType() {

return NodeType.CLASSNODE;

}

/**

* Accept for the visitor pattern.

* @param iVisitor the visitor

**/

public Object accept(NodeVisitor iVisitor) {

return iVisitor.visitClassNode(this);

}

/**

* Gets the body of this class.

*

* @return the contents

*/

public Node getBodyNode() {

return bodyNode;

}

/**

* Get the static scoping information.

*

* @return the scoping info

*/

public StaticScope getScope() {

return scope;

}

/**

* Gets the className.

* @return Returns representation of class path+name

*/

public Colon3Node getCPath() {

return cpath;

}

/**

* Gets the superNode.

* @return Returns a Node

*/

public Node getSuperNode() {

return superNode;

}

public List<Node> childNodes() {

return Node.createList(cpath, bodyNode, superNode);

}

@Override

public IRubyObject interpret(Ruby runtime, ThreadContext context, IRubyObject self, Block aBlock) {

RubyModule enclosingClass = cpath.getEnclosingModule(runtime, context, self, aBlock);

// TODO: Figure out how this can happen and possibly remove

if (enclosingClass == null) throw runtime.newTypeError("no outer class/module");

RubyClass superClass = null;

if (superNode != null) {

IRubyObject superObj = superNode.interpret(runtime, context, self, aBlock);

RubyClass.checkInheritable(superObj);

superClass = (RubyClass)superObj;

}

RubyClass clazz = enclosingClass.defineOrGetClassUnder(cpath.getName(), superClass);

scope.setModule(clazz);

IRubyObject classBodyResult = ASTInterpreter.evalClassDefinitionBody(runtime, context, scope, bodyNode, clazz, self, aBlock);

return classBodyResult;

}

}