ColorPicker.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.hadoop.chukwa.hicc;


public class ColorPicker {
  private String color = "#ff5757";
  private int index = 0;

  public ColorPicker() {
    color = "#ff5757";
  }

  public String get(int counter) {
    if ((counter % 6) == 0) {
      String purple = Integer.toHexString(256 - (counter % 255));
      color = "#" + purple + "57" + purple;
    } else if ((counter % 5) == 0) {
      String red = Integer.toHexString(256 - (counter % 255));
      color = "#" + red +"5757";
    } else if ((counter % 4) == 0) {
      String yellow = Integer.toHexString(256 - (counter % 255 * 20));
      color = "#FF" + yellow + "00";
    } else if ((counter % 3) == 0) {
      String green = Integer.toHexString(256 - (counter % 255));
      color = "#57" + green + "57";
    } else if ((counter % 2) == 0) {
      String cyan = Integer.toHexString(256 - (counter % 255));
      color = "#57" + cyan + cyan;
    } else {
      String blue = Integer.toHexString(256 - (counter % 255));
      color = "#5757" + blue + "";
    }
    return this.color;
  }

  public String getNext() {
    index++;
    return get(index);
  }
}