/*

  * Copyright (c) 2006 - 2011 Michael Schierl

  * All rights reserved.

  * 

  * This program is free software: you can redistribute it and/or modify

  * it under the terms of the GNU General Public License as published by

  * the Free Software Foundation, either version 2 of the License, or

  * (at your option) any later version.

  * 

  * This program is distributed in the hope that it will be useful,

  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  * GNU General Public License for more details.

  * 

  * You should have received a copy of the GNU General Public License

  * along with this program.  If not, see <http://www.gnu.org/licenses/>.

  */

 package net.sf.jmatchparser.template.engine.operation;

 import net.sf.jmatchparser.template.engine.ParserState;

 import net.sf.jmatchparser.template.engine.parameter.Parameter;

 public class LoopForkOperation extends Operation {

         private final Label label;

         private final CounterOperation co;

         private final Parameter mincount;

         private final Parameter maxcount;

         public LoopForkOperation(String templatePosition, Label label,

                         CounterOperation co, Parameter mincount, Parameter maxcount) {

                 super(templatePosition);

                 this.label = label;

                 this.co = co;

                 this.mincount = mincount;

                 this.maxcount = maxcount;

         }

         @Override

         public OperationResult execute(ParserState state) {

                 int min = 0, max = Integer.MAX_VALUE;

                 try {

                         min = Integer.parseInt(mincount.getString(state));

                 } catch (NumberFormatException ex) {

                 }

                 if (maxcount != null) {

                         try {

                                 max = Integer.parseInt(maxcount.getString(state));

                         } catch (NumberFormatException ex) {

                         }

                 }

                 if (min > max) {

                         int tmp = max;

                         max = min;

                         min = tmp;

                 }

                 int counter = co.getCounter();

                 if (counter < max) {

                         // fork inside the loop

                         state.getParser().enqueueState(new ParserState(state, label.getDestination()));

                 }

                 if (counter < min) {

                         return OperationResult.DIE;

                 }

                 return OperationResult.CONTINUE;

         }

 }