1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.commons.imaging.palette;
18
19 import java.util.Objects;
20
21 public class SimplePalette implements Palette {
22
23 private final int[] palette;
24
25 /**
26 * Constructs a new instance.
27 *
28 * @param palette palette to copy and store.
29 */
30 public SimplePalette(final int[] palette) {
31 this.palette = Objects.requireNonNull(palette, "palette").clone();
32 }
33
34 @Override
35 public int getEntry(final int index) {
36 return palette[index];
37 }
38
39 @Override
40 public int getPaletteIndex(final int rgb) {
41 for (int i = 0; i < palette.length; i++) {
42 if (palette[i] == rgb) {
43 return i;
44 }
45 }
46 return -1;
47 }
48
49 @Override
50 public int length() {
51 return palette.length;
52 }
53 }