1 /*
2 * Copyright (C) 2010, Red Hat Inc.
3 * and other copyright owners as documented in the project's IP log.
4 *
5 * This program and the accompanying materials are made available
6 * under the terms of the Eclipse Distribution License v1.0 which
7 * accompanies this distribution, is reproduced below, and is
8 * available at http://www.eclipse.org/org/documents/edl-v10.php
9 *
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials provided
22 * with the distribution.
23 *
24 * - Neither the name of the Eclipse Foundation, Inc. nor the
25 * names of its contributors may be used to endorse or promote
26 * products derived from this software without specific prior
27 * written permission.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
30 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
31 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
32 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
34 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
35 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
36 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
37 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
38 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
41 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
42 */
43 package org.eclipse.jgit.attributes;
44
45 import java.io.BufferedReader;
46 import java.io.IOException;
47 import java.io.InputStream;
48 import java.io.InputStreamReader;
49 import java.util.ArrayList;
50 import java.util.Collections;
51 import java.util.List;
52
53 import org.eclipse.jgit.lib.Constants;
54
55 /**
56 * Represents a bundle of attributes inherited from a base directory.
57 *
58 * This class is not thread safe, it maintains state about the last match.
59 *
60 * @since 3.7
61 */
62 public class AttributesNode {
63 /** The rules that have been parsed into this node. */
64 private final List<AttributesRule> rules;
65
66 /**
67 * Create an empty ignore node with no rules.
68 */
69 public AttributesNode() {
70 rules = new ArrayList<>();
71 }
72
73 /**
74 * Create an ignore node with given rules.
75 *
76 * @param rules
77 * list of rules.
78 */
79 public AttributesNode(List<AttributesRule> rules) {
80 this.rules = rules;
81 }
82
83 /**
84 * Parse files according to gitattribute standards.
85 *
86 * @param in
87 * input stream holding the standard ignore format. The caller is
88 * responsible for closing the stream.
89 * @throws java.io.IOException
90 * Error thrown when reading an ignore file.
91 */
92 public void parse(InputStream in) throws IOException {
93 BufferedReader br = asReader(in);
94 String txt;
95 while ((txt = br.readLine()) != null) {
96 txt = txt.trim();
97 if (txt.length() > 0 && !txt.startsWith("#") /* Comments *///$NON-NLS-1$
98 && !txt.startsWith("!") /* Negative pattern forbidden for attributes */) { //$NON-NLS-1$
99 int patternEndSpace = txt.indexOf(' ');
100 int patternEndTab = txt.indexOf('\t');
101
102 final int patternEnd;
103 if (patternEndSpace == -1)
104 patternEnd = patternEndTab;
105 else if (patternEndTab == -1)
106 patternEnd = patternEndSpace;
107 else
108 patternEnd = Math.min(patternEndSpace, patternEndTab);
109
110 if (patternEnd > -1)
111 rules.add(new AttributesRule(txt.substring(0, patternEnd),
112 txt.substring(patternEnd + 1).trim()));
113 }
114 }
115 }
116
117 private static BufferedReader asReader(InputStream in) {
118 return new BufferedReader(new InputStreamReader(in, Constants.CHARSET));
119 }
120
121 /**
122 * Getter for the field <code>rules</code>.
123 *
124 * @return list of all ignore rules held by this node
125 */
126 public List<AttributesRule> getRules() {
127 return Collections.unmodifiableList(rules);
128 }
129
130 }