    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.common;
    018
    019import java.io.IOException;
    020import java.io.OutputStream;
    021import java.util.Arrays;
    022
    023public class BinaryConstant {
    024    private final byte[] value;
    025
    026    public BinaryConstant(final byte[] value) {
    027        this.value = value.clone();
    028    }
    029
    030    public boolean equals(final byte[] bytes) {
    031        return Arrays.equals(value, bytes);
    032    }
    033
    034    @Override
    035    public boolean equals(final Object obj) {
    036        if (obj == null) {
    037            return false;
    038        }
    039        if (!(obj instanceof BinaryConstant)) {
    040            return false;
    041        }
    042        final BinaryConstant other = (BinaryConstant) obj;
    043        return equals(other.value);
    044    }
    045
    046    public byte get(final int i) {
    047        return value[i];
    048    }
    049
    050    @Override
    051    public int hashCode() {
    052        return Arrays.hashCode(value);
    053    }
    054
    055    /**
    056     * Tests whether the give buffer starts with this binary constant.
    057     *
    058     * @param buffer The buffer to test.
    059     * @return Whether the give buffer starts with this binary constant.
    060     */
    061    public boolean isStartOf(final byte[] buffer) {
    062        return BinaryFunctions.startsWith(buffer, value);
    063    }
    064
    065    byte[] rawValue() {
    066        return value;
    067    }
    068
    069    public int size() {
    070        return value.length;
    071    }
    072
    073    public void writeTo(final OutputStream os) throws IOException {
    074        for (final byte element : value) {
    075            os.write(element);
    076        }
    077    }
    078}