/*
***** BEGIN LICENSE BLOCK *****
* Version: CPL 1.0/GPL 2.0/LGPL 2.1
*
* 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
* the License at http://www.eclipse.org/legal/cpl-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.RubyHash;
import org.jruby.ast.visitor.NodeVisitor;
import org.jruby.evaluator.Instruction;
import org.jruby.lexer.yacc.ISourcePosition;
import org.jruby.runtime.Block;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;
/**
* A Literal Hash that can represent either a {a=&b, c=&d} type expression or the list
* of default values in a method call.
*/
public class HashNode extends Node {
private final ListNode listNode;
public HashNode(ISourcePosition position, ListNode listNode) {
super(position, NodeType.HASHNODE);
this.listNode = listNode;
}
/**
* Accept for the visitor pattern.
* @param iVisitor the visitor
**/
public Instruction accept(NodeVisitor iVisitor) {
return iVisitor.visitHashNode(this);
}
/**
* Gets the listNode.
* @return Returns a IListNode
*/
public ListNode getListNode() {
return listNode;
}
public List<Node> childNodes() {
return createList(listNode);
}
@Override
public IRubyObject interpret(Ruby runtime, ThreadContext context, IRubyObject self, Block aBlock) {
RubyHash hash = RubyHash.newHash(runtime);
ListNode listNode = this.listNode;
if (listNode != null) {
int size = listNode.size();
for (int i = 0; i < size;) {
// insert all nodes in sequence, hash them in the final instruction
// KEY
IRubyObject key = listNode.get(i++).interpret(runtime, context, self, aBlock);
IRubyObject value = listNode.get(i++).interpret(runtime, context, self, aBlock);
hash.fastASet(key, value);
}
}
return hash;
}
}