    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}