| gvSIG desktop 1

/* gvSIG. Desktop Geographic Information System.

 *

 * Copyright ? 2007-2012 gvSIG Association

 *

 * 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., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 * For any additional information, do not hesitate to contact us

 * at info AT gvsig.com, or visit our website www.gvsig.com.

 */

package org.gvsig.app.join.utils;

import java.util.ArrayList;

import org.gvsig.fmap.dal.feature.FeatureAttributeDescriptor;

import org.gvsig.fmap.dal.feature.FeatureType;

import org.gvsig.tools.dataTypes.DataTypes;

/**

 * {@link DataTypes}-related utility methods

 * 

 * @author jldominguez

 *

 */

public class TransformUtils {

    public static boolean isNumericType(int t) {

        return (t == DataTypes.DOUBLE

            || t == DataTypes.FLOAT

            || t == DataTypes.INT

            || t == DataTypes.LONG

            || t == DataTypes.BYTE);

    }

    public static boolean comparableTypes(int a, int b) {

        if (a == b) {

            return true;

        } else {

            return isNumericType(a) && isNumericType(b);

        }

    }

    /**

     * @param ft

     * @param the_type

     * @return

     */

    public static ArrayList<Integer> getComparableDataTypes(

        FeatureType ft,

        int the_type) {

        ArrayList<Integer> resp = new ArrayList<Integer>();

        FeatureAttributeDescriptor[] atts = ft.getAttributeDescriptors();

        int len = atts.length;

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

            if (comparableTypes(the_type, atts[i].getType())) {

                resp.add(atts[i].getType());

            }

        }

        return resp;

    }

}