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.compress.utils;
018
019import java.io.InputStream;
020import java.util.zip.CRC32;
021
022/**
023 * A stream that verifies the CRC of the data read once the stream is
024 * exhausted.
025 * @NotThreadSafe
026 * @since 1.6
027 */
028public class CRC32VerifyingInputStream extends ChecksumVerifyingInputStream {
029
030    /**
031     * Constructs a new instance.
032     *
033     * @param in the stream to wrap
034     * @param size the of the stream's content
035     * @param expectedCrc32 the expected checksum
036     */
037    public CRC32VerifyingInputStream(final InputStream in, final long size, final int expectedCrc32) {
038        this(in, size, expectedCrc32 & 0xFFFFffffL);
039    }
040
041    /**
042     * Constructs a new instance.
043     *
044     * @param in the stream to wrap
045     * @param size the of the stream's content
046     * @param expectedCrc32 the expected checksum
047     * @since 1.7
048     */
049    public CRC32VerifyingInputStream(final InputStream in, final long size, final long expectedCrc32) {
050        super(new CRC32(), in, size, expectedCrc32);
051    }
052
053}