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.jdom.Element;

 import org.jtheque.core.utils.file.XMLException;

 import org.jtheque.core.utils.file.XMLReader;

 import org.jtheque.primary.utils.web.analyzers.generic.Factory;

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

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

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

 import java.util.ArrayList;

 import java.util.Collection;

 /**

  * @author Baptiste Wicht

  */

 public final class IteratorValueGetterFactory implements Factory<ValueGetter> {

         @Override

         public boolean canFactor(Element element, XMLReader reader) throws XMLException{

                 return !reader.getNodes("iterator", element).isEmpty();

         }

         @Override

         public ValueGetter factor(Element element, XMLReader reader) throws XMLException{

                 Element n = reader.getNode("iterator", element);

                 IteratorValue value = new IteratorValue(ValueGetterFactory.getScannerPossessor());

                 for (IteratorOperation operation : getIteratorOperations(n, "before", reader)){

                         value.addOperationsBefore(operation);

                 }

                 for (IteratorOperation operation : getIteratorOperations(n, "after", reader)){

                         value.addOperationsAfter(operation);

                 }

                 for (IteratorOperation operation : getIteratorOperations(n, "operations", reader)){

                         value.addOperations(operation);

                 }

                 value.setCondition(ConditionUtils.getCondition(n, "condition", reader));

                 return value;

         }

         /**

          * Return the iterator operations in a specific location of node.

          *

          * @param node The node to search in.

          * @param location The location to search in.

          * @param reader The XML reader.

          *

          * @return A List containing all the IteratorOperation found in the specific location of the node.

          *

          * @throws XMLException If an errors occurs during the parse of the XML Elements.

          */

         private static Iterable<IteratorOperation> getIteratorOperations(Object node, String location, XMLReader reader) throws XMLException{

                 Collection<IteratorOperation> operations = new ArrayList<IteratorOperation>(8);

                 for (Element n : reader.getNodes(location + "/*", node)){

                         operations.add(IteratorOperationFactory.getPosition(n, reader));

                 }

                 return operations;

         }

 }