package org.jtheque.primary.utils.web.analyzers.generic.value;

 /*

  * This file is part of JTheque.

  *            

  * JTheque 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 3 of the License. 

  *

  * JTheque 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 JTheque.  If not, see <http://www.gnu.org/licenses/>.

  */

 import org.jtheque.primary.utils.web.analyzers.generic.condition.Condition;

 import org.jtheque.primary.utils.web.analyzers.generic.operation.ScannerPossessor;

 import org.jtheque.primary.utils.web.analyzers.generic.operation.iterator.IteratorOperation;

 import java.util.ArrayList;

 import java.util.Collection;

 /**

  * A value getter who iterate on different lines.

  *

  * @author Baptiste Wicht

  */

 public final class IteratorValue implements ValueGetter, BuilderPossessor {

         private final StringBuilder builder;

         private final Collection<IteratorOperation> operationsBefore;

         private final Collection<IteratorOperation> operationsAfter;

         private final Collection<IteratorOperation> operations;

         private Condition condition;

         private final ScannerPossessor analyzer;

         /**

          * Construct a new IteratorValue.

          *

          * @param analyzer The film analyzer.

          */

         IteratorValue(ScannerPossessor analyzer){

                 super();

                 this.analyzer = analyzer;

                 builder = new StringBuilder(100);

                 operationsBefore = new ArrayList<IteratorOperation>(5);

                 operationsAfter = new ArrayList<IteratorOperation>(5);

                 operations = new ArrayList<IteratorOperation>(5);

         }

         @Override

         public String getValue(String line){

                 String current = line;

                 for (IteratorOperation operation : operationsBefore){

                         current = operation.perform(current, analyzer, this);

                 }

                 while (condition.match(current)){

                         for (IteratorOperation operation : operations){

                                 current = operation.perform(current, analyzer, this);

                         }

                 }

                 for (IteratorOperation operation : operationsAfter){

                         current = operation.perform(current, analyzer, this);

                 }

                 return builder.toString();

         }

         /**

          * Add an operation to do before the iteration.

          *

          * @param operation The operation to add.

          */

         public void addOperationsBefore(IteratorOperation operation){

                 operationsBefore.add(operation);

         }

         /**

          * Add an operation to do after the iteration.

          *

          * @param operation The operation to add.

          */

         public void addOperationsAfter(IteratorOperation operation){

                 operationsAfter.add(operation);

         }

         /**

          * Add an operation to do during the iteration.

          *

          * @param operation The operation to add.

          */

         public void addOperations(IteratorOperation operation){

                 operations.add(operation);

         }

         /**

          * Set the condition of the iteration.

          *

          * @param condition The condition to set.

          */

         public void setCondition(Condition condition){

                 this.condition = condition;

         }

         @Override

         public StringBuilder getBuilder(){

                 return builder;

         }

 }