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}