/* (c) 2014 Open Source Geospatial Foundation - all rights reserved
* Copyright (C) 2007-2008-2009 GeoSolutions S.A.S.
* http://www.geo-solutions.it
* This code is licensed under the GPL 2.0 license, available at the root
* application directory.
*/
package org.geoserver.sldservice.utils.classifier.impl;
import java.awt.Color;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.geoserver.sldservice.utils.classifier.ColorRamp;
/**
* Gray Color Ramp Implementation
*
* @author Alessio Fabiani, GeoSolutions SAS
*
*/
public class GrayColorRamp implements ColorRamp {
private int classNum = 0;
private List<Color> colors = new ArrayList<Color>();
public int getNumClasses() {
return classNum;
}
public void revert() {
Collections.reverse(colors);
}
public void setNumClasses(int numClass) {
classNum = numClass+1; //+1 for transparent
createRamp();
}
public List<Color> getRamp() throws Exception {
if (colors == null)
throw new Exception("Class num not setted, color ramp null");
return colors;
}
private void createRamp() {
double step = (225.0 / (double) classNum-1);
for (int i = 1; i < classNum; i++)
colors.add(new Color((int) (step * i + 30), (int) (step * i + 30),
(int) (step * i + 30)));
}
}