ColorRamp.java

package org.geoserver.importer;

import java.awt.Color;
import java.util.ArrayList;
import java.util.List;

/**
 * A rolling color ramp with color names
 */
public class ColorRamp {
    List<String> names = new ArrayList<String>();
    List<Color> colors = new ArrayList<Color>();
    int position;
    
    /**
     * Builds an empty ramp. Mind, you need to call {@link #add(String, Color)} at least
     * once to make the ramp usable.
     */
    public ColorRamp() {
        
    }
    
    /**
     * Adds a name/color combination
     * @param name
     * @param color
     */
    public void add(String name, Color color) {
        names.add(name);
        colors.add(color);
    }
    
    /**
     * Moves to the next color in the ramp
     */
    public void next() {
        position++;
        if(position >= names.size())
            position = 0;
    }
    
    /**
     * The color name
     * @return
     */
    public String getName() {
        return names.get(position);
    }
    
    /**
     * The color
     * @return
     */
    public Color getColor() {
        return colors.get(position);
    }
    
}