001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.commons.imaging.palette; 018 019import java.util.Objects; 020 021public class SimplePalette implements Palette { 022 023 private final int[] palette; 024 025 /** 026 * Constructs a new instance. 027 * 028 * @param palette palette to copy and store. 029 */ 030 public SimplePalette(final int[] palette) { 031 this.palette = Objects.requireNonNull(palette, "palette").clone(); 032 } 033 034 @Override 035 public int getEntry(final int index) { 036 return palette[index]; 037 } 038 039 @Override 040 public int getPaletteIndex(final int rgb) { 041 for (int i = 0; i < palette.length; i++) { 042 if (palette[i] == rgb) { 043 return i; 044 } 045 } 046 return -1; 047 } 048 049 @Override 050 public int length() { 051 return palette.length; 052 } 053}