jhg: src/org/tmatesoft/hg/core/Nodeid.java annotate

annotate src/org/tmatesoft/hg/core/Nodeid.java @ 158:b413b16d10a5

Integer offsets and file length explictly, rather than casts throughout code. Inflater may benefit from total length hint, but shall calculate it by its own if needed

author	Artem Tikhomirov <tikhomirov.artem@gmail.com>
date	Wed, 09 Mar 2011 13:16:37 +0100
parents	1a7a9a20e1f9
children	71ddbf8603e8

rev	line source
20 11cfabe692b3 Status operation for two repository revisions (no local dir involved) Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 13 diff changeset	1 /*
74 6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 46 diff changeset	2 * Copyright (c) 2010-2011 TMate Software Ltd
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 46 diff changeset	3 *
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 46 diff changeset	4 * This program is free software; you can redistribute it and/or modify
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 46 diff changeset	5 * it under the terms of the GNU General Public License as published by
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 46 diff changeset	6 * the Free Software Foundation; version 2 of the License.
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 46 diff changeset	7 *
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 46 diff changeset	8 * This program is distributed in the hope that it will be useful,
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 46 diff changeset	9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 46 diff changeset	10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 46 diff changeset	11 * GNU General Public License for more details.
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 46 diff changeset	12 *
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 46 diff changeset	13 * For information on how to redistribute this software under
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 46 diff changeset	14 * the terms of a license other than GNU General Public License
102 a3a2e5deb320 Updated contact address to support@hg4j.com Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 78 diff changeset	15 * contact TMate Software at support@hg4j.com
0 dbd663faec1f Basic changelog parsing Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	16 */
74 6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 46 diff changeset	17 package org.tmatesoft.hg.core;
0 dbd663faec1f Basic changelog parsing Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	18
74 6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 46 diff changeset	19 import static org.tmatesoft.hg.internal.DigestHelper.toHexString;
31 346b66add79d Basic lookup for incoming changes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 28 diff changeset	20
24 d4fdd1845b3f Nodeid with array of exactly 20 bytes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 22 diff changeset	21 import java.util.Arrays;
d4fdd1845b3f Nodeid with array of exactly 20 bytes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 22 diff changeset	22
20 11cfabe692b3 Status operation for two repository revisions (no local dir involved) Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 13 diff changeset	23
0 dbd663faec1f Basic changelog parsing Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	24
dbd663faec1f Basic changelog parsing Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	25 /**
74 6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 46 diff changeset	26 * A 20-bytes (40 characters) long hash value to identify a revision.
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 46 diff changeset	27 * @see http://mercurial.selenic.com/wiki/Nodeid
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 46 diff changeset	28 *
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 46 diff changeset	29 * @author Artem Tikhomirov
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 46 diff changeset	30 * @author TMate Software Ltd.
0 dbd663faec1f Basic changelog parsing Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	31 *
dbd663faec1f Basic changelog parsing Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	32 */
24 d4fdd1845b3f Nodeid with array of exactly 20 bytes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 22 diff changeset	33 public final class Nodeid {
0 dbd663faec1f Basic changelog parsing Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	34
74 6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 46 diff changeset	35 /**
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 46 diff changeset	36 * <b>nullid</b>, empty root revision.
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 46 diff changeset	37 */
31 346b66add79d Basic lookup for incoming changes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 28 diff changeset	38 public static final Nodeid NULL = new Nodeid(new byte[20], false);
74 6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 46 diff changeset	39
0 dbd663faec1f Basic changelog parsing Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	40 private final byte[] binaryData;
dbd663faec1f Basic changelog parsing Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	41
24 d4fdd1845b3f Nodeid with array of exactly 20 bytes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 22 diff changeset	42 /**
74 6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 46 diff changeset	43 * @param binaryRepresentation - array of exactly 20 bytes
148 1a7a9a20e1f9 Exceptions, javadoc. Initial cancel and progress support Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 125 diff changeset	44 * @param shallClone - true if array is subject to future modification and shall be copied, not referenced
1a7a9a20e1f9 Exceptions, javadoc. Initial cancel and progress support Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 125 diff changeset	45 * @throws IllegalArgumentException if supplied binary representation doesn't correspond to 20 bytes of sha1 digest
24 d4fdd1845b3f Nodeid with array of exactly 20 bytes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 22 diff changeset	46 */
28 b2251b7a9823 Explicit cons arg for clone is more error-prone Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 24 diff changeset	47 public Nodeid(byte[] binaryRepresentation, boolean shallClone) {
0 dbd663faec1f Basic changelog parsing Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	48 // 5 int fields => 32 bytes
dbd663faec1f Basic changelog parsing Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	49 // byte[20] => 48 bytes
24 d4fdd1845b3f Nodeid with array of exactly 20 bytes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 22 diff changeset	50 if (binaryRepresentation == null \|\| binaryRepresentation.length != 20) {
d4fdd1845b3f Nodeid with array of exactly 20 bytes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 22 diff changeset	51 throw new IllegalArgumentException();
d4fdd1845b3f Nodeid with array of exactly 20 bytes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 22 diff changeset	52 }
28 b2251b7a9823 Explicit cons arg for clone is more error-prone Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 24 diff changeset	53 this.binaryData = shallClone ? binaryRepresentation.clone() : binaryRepresentation;
0 dbd663faec1f Basic changelog parsing Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	54 }
dbd663faec1f Basic changelog parsing Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	55
24 d4fdd1845b3f Nodeid with array of exactly 20 bytes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 22 diff changeset	56 @Override
d4fdd1845b3f Nodeid with array of exactly 20 bytes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 22 diff changeset	57 public int hashCode() {
46 4022c34a4804 Better hashCode impl Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 41 diff changeset	58 // digest (part thereof) seems to be nice candidate for the hashCode
4022c34a4804 Better hashCode impl Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 41 diff changeset	59 byte[] b = binaryData;
4022c34a4804 Better hashCode impl Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 41 diff changeset	60 return b[0] << 24 \| (b[1] & 0xFF) << 16 \| (b[2] & 0xFF) << 8 \| (b[3] & 0xFF);
24 d4fdd1845b3f Nodeid with array of exactly 20 bytes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 22 diff changeset	61 }
d4fdd1845b3f Nodeid with array of exactly 20 bytes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 22 diff changeset	62
d4fdd1845b3f Nodeid with array of exactly 20 bytes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 22 diff changeset	63 @Override
d4fdd1845b3f Nodeid with array of exactly 20 bytes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 22 diff changeset	64 public boolean equals(Object o) {
d4fdd1845b3f Nodeid with array of exactly 20 bytes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 22 diff changeset	65 if (o instanceof Nodeid) {
125 26ad21b250e4 Explicit op to tell merge revisions Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 102 diff changeset	66 return this == o \|\| equalsTo(((Nodeid) o).binaryData);
24 d4fdd1845b3f Nodeid with array of exactly 20 bytes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 22 diff changeset	67 }
d4fdd1845b3f Nodeid with array of exactly 20 bytes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 22 diff changeset	68 return false;
22 603806cd2dc6 Status of local working dir against non-tip base revision Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 20 diff changeset	69 }
603806cd2dc6 Status of local working dir against non-tip base revision Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 20 diff changeset	70
603806cd2dc6 Status of local working dir against non-tip base revision Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 20 diff changeset	71 public boolean equalsTo(byte[] buf) {
24 d4fdd1845b3f Nodeid with array of exactly 20 bytes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 22 diff changeset	72 return Arrays.equals(this.binaryData, buf);
22 603806cd2dc6 Status of local working dir against non-tip base revision Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 20 diff changeset	73 }
603806cd2dc6 Status of local working dir against non-tip base revision Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 20 diff changeset	74
0 dbd663faec1f Basic changelog parsing Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	75 @Override
dbd663faec1f Basic changelog parsing Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	76 public String toString() {
34 51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	77 // XXX may want to output just single 0 for the NULL id?
31 346b66add79d Basic lookup for incoming changes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 28 diff changeset	78 return toHexString(binaryData, 0, binaryData.length);
0 dbd663faec1f Basic changelog parsing Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	79 }
31 346b66add79d Basic lookup for incoming changes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 28 diff changeset	80
346b66add79d Basic lookup for incoming changes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 28 diff changeset	81 public String shortNotation() {
346b66add79d Basic lookup for incoming changes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 28 diff changeset	82 return toHexString(binaryData, 0, 6);
346b66add79d Basic lookup for incoming changes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 28 diff changeset	83 }
34 51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	84
51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	85 public boolean isNull() {
51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	86 if (this == NULL) {
51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	87 return true;
51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	88 }
51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	89 for (int i = 0; i < 20; i++) {
51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	90 if (this.binaryData[i] != 0) {
51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	91 return false;
51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	92 }
51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	93 }
51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	94 return true;
51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	95 }
51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	96
74 6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 46 diff changeset	97 // copy
6f1b88693d48 Complete refactoring to org.tmatesoft Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 46 diff changeset	98 public byte[] toByteArray() {
41 858d1b2458cb Check integrity for bundle changelog. Sort nodeids when calculating hash Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 34 diff changeset	99 return binaryData.clone();
858d1b2458cb Check integrity for bundle changelog. Sort nodeids when calculating hash Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 34 diff changeset	100 }
858d1b2458cb Check integrity for bundle changelog. Sort nodeids when calculating hash Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 34 diff changeset	101
148 1a7a9a20e1f9 Exceptions, javadoc. Initial cancel and progress support Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 125 diff changeset	102 /**
1a7a9a20e1f9 Exceptions, javadoc. Initial cancel and progress support Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 125 diff changeset	103 * Factory for {@link Nodeid Nodeids}.
1a7a9a20e1f9 Exceptions, javadoc. Initial cancel and progress support Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 125 diff changeset	104 * Primary difference with cons is handling of NULL id (this method returns constant) and control over array
1a7a9a20e1f9 Exceptions, javadoc. Initial cancel and progress support Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 125 diff changeset	105 * duplication - this method always makes a copy of an array passed
1a7a9a20e1f9 Exceptions, javadoc. Initial cancel and progress support Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 125 diff changeset	106 * @param binaryRepresentation - byte array of a length at least offset + 20
1a7a9a20e1f9 Exceptions, javadoc. Initial cancel and progress support Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 125 diff changeset	107 * @param offset - index in the array to start from
1a7a9a20e1f9 Exceptions, javadoc. Initial cancel and progress support Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 125 diff changeset	108 * @throws IllegalArgumentException when arguments don't select 20 bytes
1a7a9a20e1f9 Exceptions, javadoc. Initial cancel and progress support Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 125 diff changeset	109 */
34 51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	110 public static Nodeid fromBinary(byte[] binaryRepresentation, int offset) {
51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	111 if (binaryRepresentation == null \|\| binaryRepresentation.length - offset < 20) {
51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	112 throw new IllegalArgumentException();
51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	113 }
51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	114 int i = 0;
51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	115 while (i < 20 && binaryRepresentation[offset+i] == 0) i++;
51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	116 if (i == 20) {
51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	117 return NULL;
51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	118 }
51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	119 if (offset == 0 && binaryRepresentation.length == 20) {
51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	120 return new Nodeid(binaryRepresentation, true);
51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	121 }
51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	122 byte[] b = new byte[20]; // create new instance if no other reasonable guesses possible
51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	123 System.arraycopy(binaryRepresentation, offset, b, 0, 20);
51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	124 return new Nodeid(b, false);
51bc56c0addd Static Nodeid creation methods to reuse NULL id Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 31 diff changeset	125 }
31 346b66add79d Basic lookup for incoming changes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 28 diff changeset	126
148 1a7a9a20e1f9 Exceptions, javadoc. Initial cancel and progress support Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 125 diff changeset	127 /**
1a7a9a20e1f9 Exceptions, javadoc. Initial cancel and progress support Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 125 diff changeset	128 * Parse encoded representation.
1a7a9a20e1f9 Exceptions, javadoc. Initial cancel and progress support Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 125 diff changeset	129 *
1a7a9a20e1f9 Exceptions, javadoc. Initial cancel and progress support Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 125 diff changeset	130 * @param asciiRepresentation - encoded form of the Nodeid.
1a7a9a20e1f9 Exceptions, javadoc. Initial cancel and progress support Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 125 diff changeset	131 * @return object representation
1a7a9a20e1f9 Exceptions, javadoc. Initial cancel and progress support Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 125 diff changeset	132 * @throws IllegalArgumentException when argument doesn't match encoded form of 20-bytes sha1 digest.
1a7a9a20e1f9 Exceptions, javadoc. Initial cancel and progress support Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 125 diff changeset	133 */
78 c25c5c348d1b Skip metadata in the beginning of a file content. Parse metadata, recognize copies/renames Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 74 diff changeset	134 public static Nodeid fromAscii(String asciiRepresentation) {
c25c5c348d1b Skip metadata in the beginning of a file content. Parse metadata, recognize copies/renames Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 74 diff changeset	135 if (asciiRepresentation.length() != 40) {
c25c5c348d1b Skip metadata in the beginning of a file content. Parse metadata, recognize copies/renames Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 74 diff changeset	136 throw new IllegalArgumentException();
c25c5c348d1b Skip metadata in the beginning of a file content. Parse metadata, recognize copies/renames Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 74 diff changeset	137 }
c25c5c348d1b Skip metadata in the beginning of a file content. Parse metadata, recognize copies/renames Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 74 diff changeset	138 // XXX is better impl for String possible?
c25c5c348d1b Skip metadata in the beginning of a file content. Parse metadata, recognize copies/renames Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 74 diff changeset	139 return fromAscii(asciiRepresentation.getBytes(), 0, 40);
c25c5c348d1b Skip metadata in the beginning of a file content. Parse metadata, recognize copies/renames Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 74 diff changeset	140 }
148 1a7a9a20e1f9 Exceptions, javadoc. Initial cancel and progress support Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 125 diff changeset	141
1a7a9a20e1f9 Exceptions, javadoc. Initial cancel and progress support Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 125 diff changeset	142 /**
1a7a9a20e1f9 Exceptions, javadoc. Initial cancel and progress support Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 125 diff changeset	143 * Parse encoded representation. Similar to {@link #fromAscii(String)}.
1a7a9a20e1f9 Exceptions, javadoc. Initial cancel and progress support Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 125 diff changeset	144 */
0 dbd663faec1f Basic changelog parsing Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	145 public static Nodeid fromAscii(byte[] asciiRepresentation, int offset, int length) {
24 d4fdd1845b3f Nodeid with array of exactly 20 bytes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 22 diff changeset	146 if (length != 40) {
d4fdd1845b3f Nodeid with array of exactly 20 bytes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 22 diff changeset	147 throw new IllegalArgumentException();
d4fdd1845b3f Nodeid with array of exactly 20 bytes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 22 diff changeset	148 }
d4fdd1845b3f Nodeid with array of exactly 20 bytes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 22 diff changeset	149 byte[] data = new byte[20];
31 346b66add79d Basic lookup for incoming changes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 28 diff changeset	150 boolean zeroBytes = true;
0 dbd663faec1f Basic changelog parsing Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	151 for (int i = 0, j = offset; i < data.length; i++) {
dbd663faec1f Basic changelog parsing Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	152 int hiNibble = Character.digit(asciiRepresentation[j++], 16);
dbd663faec1f Basic changelog parsing Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	153 int lowNibble = Character.digit(asciiRepresentation[j++], 16);
31 346b66add79d Basic lookup for incoming changes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 28 diff changeset	154 byte b = (byte) (((hiNibble << 4) \| lowNibble) & 0xFF);
346b66add79d Basic lookup for incoming changes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 28 diff changeset	155 data[i] = b;
346b66add79d Basic lookup for incoming changes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 28 diff changeset	156 zeroBytes = zeroBytes && b == 0;
346b66add79d Basic lookup for incoming changes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 28 diff changeset	157 }
346b66add79d Basic lookup for incoming changes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 28 diff changeset	158 if (zeroBytes) {
346b66add79d Basic lookup for incoming changes Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 28 diff changeset	159 return NULL;
0 dbd663faec1f Basic changelog parsing Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	160 }
28 b2251b7a9823 Explicit cons arg for clone is more error-prone Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: 24 diff changeset	161 return new Nodeid(data, false);
0 dbd663faec1f Basic changelog parsing Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	162 }
dbd663faec1f Basic changelog parsing Artem Tikhomirov <tikhomirov.artem@gmail.com> parents: diff changeset	163 }

Mercurial > jhg

annotate src/org/tmatesoft/hg/core/Nodeid.java @ 158:b413b16d10a5