/*

***** 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.jcodings.Encoding;

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.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;

// 1.8 constructor

public DRegexpNode(ISourcePosition position, RegexpOptions options) {

this(position, options, null);

}

// 1.9 constructor

public DRegexpNode(ISourcePosition position, RegexpOptions options, Encoding encoding) {

super(position, encoding);

this.options = options;

}

@Override

public NodeType getNodeType() {

return NodeType.DREGEXPNODE;

}

/**

* 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.

*/

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;

if (runtime.is1_9()) {

string = buildDRegexpString19(runtime, context, self, aBlock);

} else {

string = buildDynamicString(runtime, context, self, aBlock);

}

RubyRegexp regexp = RubyRegexp.newDRegexp(runtime, string, options);

if (getOnce() && onceRegexp == null) onceRegexp = regexp;

return regexp;

}

private RubyString buildDRegexpString19(Ruby runtime, ThreadContext context, IRubyObject self, Block aBlock) {

RubyString string = null;

int size = size();

RubyString[] strings = new RubyString[size];

for (int i = 0; i < size; i++) {

strings[i] = getString(runtime, context, self, aBlock, string, get(i));

}

return RubyRegexp.preprocessDRegexp(runtime, strings, options);

}

public RubyString getString(Ruby runtime, ThreadContext context, IRubyObject self, Block aBlock, RubyString string, Node node) {

return node.interpret(runtime, context, self, aBlock).convertToString();

}

}