| Clover coverage report - PLT Utilities Test Coverage (plt-20120304-r5436) |
|
 |
|
|
|||||||||||||||||||
| Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
| ChecksumOutputStream.java | - | 71.4% | 55.6% | 62.5% |
|
||||||||||||||
| 1 | /*BEGIN_COPYRIGHT_BLOCK* | |
| 2 | ||
| 3 | PLT Utilities BSD License | |
| 4 | ||
| 5 | Copyright (c) 2007-2010 JavaPLT group at Rice University | |
| 6 | All rights reserved. | |
| 7 | ||
| 8 | Developed by: Java Programming Languages Team | |
| 9 | Rice University | |
| 10 | http://www.cs.rice.edu/~javaplt/ | |
| 11 | ||
| 12 | Redistribution and use in source and binary forms, with or without modification, are permitted | |
| 13 | provided that the following conditions are met: | |
| 14 | ||
| 15 | - Redistributions of source code must retain the above copyright notice, this list of conditions | |
| 16 | and the following disclaimer. | |
| 17 | - Redistributions in binary form must reproduce the above copyright notice, this list of | |
| 18 | conditions and the following disclaimer in the documentation and/or other materials provided | |
| 19 | with the distribution. | |
| 20 | - Neither the name of the JavaPLT group, Rice University, nor the names of the library's | |
| 21 | contributors may be used to endorse or promote products derived from this software without | |
| 22 | specific prior written permission. | |
| 23 | ||
| 24 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR | |
| 25 | IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND | |
| 26 | FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS AND | |
| 27 | CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 28 | DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 29 | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER | |
| 30 | IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT | |
| 31 | OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 32 | ||
| 33 | *END_COPYRIGHT_BLOCK*/ | |
| 34 | ||
| 35 | package edu.rice.cs.plt.io; | |
| 36 | ||
| 37 | import java.util.zip.Checksum; | |
| 38 | import java.util.zip.CRC32; | |
| 39 | import java.util.zip.Adler32; | |
| 40 | ||
| 41 | /** A stream that accumulates its bytes in a {@link Checksum} object. */ | |
| 42 | public class ChecksumOutputStream extends DirectOutputStream { | |
| 43 | private final Checksum _checksum; | |
| 44 | ||
| 45 | /** | |
| 46 | * Instantiate with the given Checksum. {@code checksum} will not be reset, and | |
| 47 | * may contain a partially-computed value. | |
| 48 | */ | |
| 49 | 4 | public ChecksumOutputStream(Checksum checksum) { _checksum = checksum; } |
| 50 | ||
| 51 | /** | |
| 52 | * Return {@code checksum.getValue()}. For 32-bit checksums, this can be cast to an int | |
| 53 | * without losing any information. | |
| 54 | */ | |
| 55 | 4 | public long getValue() { return _checksum.getValue(); } |
| 56 | ||
| 57 | 0 | @Override public void close() {} |
| 58 | 0 | @Override public void flush() {} |
| 59 | 0 | @Override public void write(byte[] bbuf) { _checksum.update(bbuf, 0, bbuf.length); } |
| 60 | 2 | @Override public void write(byte[] bbuf, int offset, int len) { _checksum.update(bbuf, offset, len); } |
| 61 | 0 | @Override public void write(int b) { _checksum.update(b); } |
| 62 | ||
| 63 | /** | |
| 64 | * Create a stream for computing CRC-32 checksums. | |
| 65 | * @see CRC32 | |
| 66 | */ | |
| 67 | 2 | public static ChecksumOutputStream makeCRC32() { |
| 68 | 2 | return new ChecksumOutputStream(new CRC32()); |
| 69 | } | |
| 70 | ||
| 71 | /** | |
| 72 | * Create a stream for computing Adler-32 checksums. | |
| 73 | * @see Adler32 | |
| 74 | */ | |
| 75 | 2 | public static ChecksumOutputStream makeAdler32() { |
| 76 | 2 | return new ChecksumOutputStream(new Adler32()); |
| 77 | } | |
| 78 | ||
| 79 | } |
|
||||||||||
