| gvSIG desktop 1

/*

 * Created on 22-may-2006

 *

 * gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.

 *

 * 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, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

/* CVS MESSAGES:

*

* $Id: FunctionSummarizer.java 5918 2006-06-20 18:20:45Z azabala $

* $Log$

* Revision 1.1  2006-06-20 18:20:45  azabala

* first version in cvs

*

* Revision 1.1  2006/05/24 21:11:14  azabala

* primera version en cvs despues de refactoring orientado a crear un framework extensible de geoprocessing

*

*

*/

package com.iver.cit.gvsig.geoprocess.impl.dissolve.fmap;

import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;

import java.util.Map;

import com.hardcode.gdbms.engine.data.driver.DriverException;

import com.hardcode.gdbms.engine.values.NumericValue;

import com.hardcode.gdbms.engine.values.Value;

import com.iver.cit.gvsig.fmap.layers.SelectableDataSource;

import com.iver.cit.gvsig.geoprocess.core.fmap.SummarizationFunction;

/**

 * For a given key set of numeric fields to summarize, and the summarization

 * functions selected by user, it computes this summarization values.

 * 

 * 

 * @author azabala

 *

 */

public class FunctionSummarizer {

        /**

         * Relates each numeric field with its sumarization functions

         */

        Map numericField_functions;

        /**

         * Reads field values, to compute sumarization functions

         */

        SelectableDataSource recordset;

        /**

         * Contains results of sumarization functions computations

         */

        List sumarizedValues;

        /**

         * Constructor

         * @param numericField_functions

         * @param recordset

         */

        public FunctionSummarizer(Map numericField_functions,

                        SelectableDataSource recordset){

                this.numericField_functions = numericField_functions;

                this.recordset = recordset;

                sumarizedValues = new ArrayList();

        }

        /**

         * Resets sumarization functions state, and clear list of results

         *

         */

        public void resetFunctions() {

                if (numericField_functions == null)

                        return;

                Iterator fieldsIt = numericField_functions.keySet().iterator();

                while (fieldsIt.hasNext()) {

                        String field = (String) fieldsIt.next();

                        SummarizationFunction[] functions = 

                                (SummarizationFunction[]) numericField_functions

                                        .get(field);

                        for (int i = 0; i < functions.length; i++) {

                                functions[i].reset();

                        }// for

                }// while

                sumarizedValues.clear();

        }

        /**

         * Reads field values of the feature of index "recordIndex", and applies

         * sumarization functions for them

         * @param recordIndex

         * @throws DriverException

         */

        public void applySumarizeFunction(int recordIndex)

                        throws DriverException {

                if (numericField_functions == null)

                        return;

                Iterator fieldsIt = numericField_functions.keySet().iterator();

                while (fieldsIt.hasNext()) {

                        String field = (String) fieldsIt.next();

                        int fieldIndex = recordset.getFieldIndexByName(field);

                        Value valToSumarize = recordset.getFieldValue(recordIndex,

                                        fieldIndex);

                        SummarizationFunction[] functions = 

                                (SummarizationFunction[]) numericField_functions

                                                                                                        .get(field);

                        for (int i = 0; i < functions.length; i++) {

                                functions[i].process((NumericValue) valToSumarize);

                        }// for

                }// while

        }

        public List getValues(){

                Iterator fieldsIt = numericField_functions.keySet().iterator();

                while(fieldsIt.hasNext()){

                        String field = (String) fieldsIt.next();

                        SummarizationFunction[] functions = 

                                (SummarizationFunction[]) numericField_functions

                                                                                                        .get(field);

                        for (int i = 0; i < functions.length; i++) {

                                sumarizedValues.add(functions[i].getSumarizeValue());

                        }// for

                }//while

                return sumarizedValues;

        }

}