org.jgrasstools.gears.io.converters.IdValuesArray2IdValuesConverter Maven / Gradle / Ivy

Go to download
/*
 * JGrass - Free Open Source Java GIS http://www.jgrass.org 
 * (C) HydroloGIS - www.hydrologis.com 
 * 
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Library General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option) any
 * later version.
 * 
 * This library 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 Library General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU Library General Public License
 * along with this library; if not, write to the Free Foundation, Inc., 59
 * Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package org.jgrasstools.gears.io.converters;

import static org.jgrasstools.gears.libs.modules.JGTConstants.isNovalue;

import java.io.IOException;
import java.util.HashMap;
import java.util.Set;
import java.util.Map.Entry;

import oms3.annotations.Author;
import oms3.annotations.Description;
import oms3.annotations.Execute;
import oms3.annotations.In;
import oms3.annotations.Keywords;
import oms3.annotations.License;
import oms3.annotations.Out;
import oms3.annotations.Status;
@Description("Utility class for converting from 'id1 value1[]' to 'id1 value1' by averaging.")
@Author(name = "Andrea Antonello", contact = "www.hydrologis.com")
@Keywords("IO, Reading")
@Status(Status.DRAFT)
@License("http://www.gnu.org/licenses/gpl-3.0.html")
public class IdValuesArray2IdValuesConverter {
    @Description("Input data.")
    @In
    public HashMap inData;

    @Description("Output data.")
    @Out
    public HashMap outData;

    @Execute
    public void convert() throws IOException {
        if (outData==null) {
            outData = new HashMap();
        }
        Set> entries = inData.entrySet();
        for( Entry entry : entries ) {
            Integer id = entry.getKey();
            double[] value = entry.getValue();

            double avg = 0;
            int num = 0;
            for( double d : value ) {
                if (!isNovalue(d)) {
                    avg = avg + d;
                    num++;
                }
            }
            avg = avg / num;
            
            outData.put(id, avg);
        }
    }

}