/*
***** 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) 2002 Benoit Cerrina <b.cerrina@wanadoo.fr>
* Copyright (C) 2002 Jan Arne Petersen <jpetersen@uni-bonn.de>
* Copyright (C) 2004 Anders Bengtsson <ndrsbngtssn@yahoo.se>
* Copyright (C) 2004 Thomas E Enebo <enebo@acm.org>
* Copyright (C) 2004 Stefan Matthias Aust <sma@3plus4.de>
*
* 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"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the CPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the CPL, the GPL or the LGPL.
***** END LICENSE BLOCK *****/
package org.jruby.ast;
import org.jruby.Ruby;
import org.jruby.RubyRegexp;
import org.jruby.RubyString;
import org.jruby.ast.types.ILiteralNode;
import org.jruby.ast.visitor.NodeVisitor;
import org.jruby.lexer.yacc.ISourcePosition;
import org.jruby.runtime.Block;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;
import org.jruby.util.ByteList;
import org.jruby.util.RegexpOptions;
/**
* A regexp which contains some expressions which will need to be evaluated everytime the regexp
* is used for a match.
*/
public class DRegexpNode extends DNode implements ILiteralNode {
private final RegexpOptions options;
private RubyRegexp onceRegexp;
private boolean is19;
// 1.8 constructor
public DRegexpNode(ISourcePosition position, RegexpOptions options) {
this(position, options, false);
}
// 1.9 constructor
public DRegexpNode(ISourcePosition position, RegexpOptions options, boolean is19) {
super(position, null);
this.options = options;
this.is19 = is19;
}
@Override
public NodeType getNodeType() {
return NodeType.DREGEXPNODE;
}
@Override
protected RubyString allocateString(Ruby runtime) {
return runtime.newString(new ByteList());
}
@Override
public boolean is19() {
return is19;
}
/**
* Accept for the visitor pattern.
* @param iVisitor the visitor
**/
@Override
public Object accept(NodeVisitor iVisitor) {
return iVisitor.visitDRegxNode(this);
}
/**
* Gets the once.
* @return Returns a boolean
*/
public boolean getOnce() {
return options.isOnce();
}
/**
* Gets the options.
* @return Returns a int
*/
public RegexpOptions getOptions() {
return options;
}
@Override
public IRubyObject interpret(Ruby runtime, ThreadContext context, IRubyObject self, Block aBlock) {
if (getOnce() && onceRegexp != null) return onceRegexp;
RubyString string = (RubyString) super.interpret(runtime, context, self, aBlock);
RubyRegexp regexp = RubyRegexp.newDRegexp(runtime, string, options);
if (getOnce() && onceRegexp == null) onceRegexp = regexp;
return regexp;
}
}