1 /*
2 * Copyright (c) 2005, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.xml.internal.stream.buffer;
27
28 import org.xml.sax.Attributes;
29
30 /**
31 * Class for holding attributes.
32 *
33 * Since it implements {@link Attributes}, this class follows the SAX convention
34 * of using "" instead of null.
35 */
36 @SuppressWarnings({"PointlessArithmeticExpression"})
37 public final class AttributesHolder implements Attributes {
38 private static final int DEFAULT_CAPACITY = 8;
39 private static final int ITEM_SIZE = 1 << 3;
40
41 private static final int PREFIX = 0;
42 private static final int URI = 1;
43 private static final int LOCAL_NAME = 2;
44 private static final int QNAME = 3;
45 private static final int TYPE = 4;
46 private static final int VALUE = 5;
47
48 private int _attributeCount;
49
50 private String[] _strings;
51
52 public AttributesHolder() {
53 _strings = new String[DEFAULT_CAPACITY * ITEM_SIZE];
54 }
55
56 public final int getLength() {
57 return _attributeCount;
58 }
59
60 public final String getPrefix(int index) {
61 return (index >= 0 && index < _attributeCount) ?
62 _strings[(index << 3) + PREFIX] : null;
63 }
64
65 public final String getLocalName(int index) {
66 return (index >= 0 && index < _attributeCount) ?
67 _strings[(index << 3) + LOCAL_NAME] : null;
68 }
69
70 public final String getQName(int index) {
71 return (index >= 0 && index < _attributeCount) ?
72 _strings[(index << 3) + QNAME] : null;
73 }
74
75 public final String getType(int index) {
76 return (index >= 0 && index < _attributeCount) ?
77 _strings[(index << 3) + TYPE] : null;
78 }
79
80 public final String getURI(int index) {
81 return (index >= 0 && index < _attributeCount) ?
82 _strings[(index << 3) + URI] : null;
83 }
84
85 public final String getValue(int index) {
86 return (index >= 0 && index < _attributeCount) ?
87 _strings[(index << 3) + VALUE] : null;
88 }
89
90 public final int getIndex(String qName) {
91 for (int i = 0; i < _attributeCount; i++) {
92 if (qName.equals(_strings[(i << 3) + QNAME])) {
93 return i;
94 }
95 }
96 return -1;
97 }
98
99 public final String getType(String qName) {
100 final int i = (getIndex(qName) << 3) + TYPE;
101 return (i >= 0) ? _strings[i] : null;
102 }
103
104 public final String getValue(String qName) {
105 final int i = (getIndex(qName) << 3) + VALUE;
106 return (i >= 0) ? _strings[i] : null;
107 }
108
109 public final int getIndex(String uri, String localName) {
110 for (int i = 0; i < _attributeCount; i++) {
111 if (localName.equals(_strings[(i << 3) + LOCAL_NAME]) &&
112 uri.equals(_strings[(i << 3) + URI])) {
113 return i;
114 }
115 }
116 return -1;
117 }
118
119 public final String getType(String uri, String localName) {
120 final int i = (getIndex(uri, localName) << 3) + TYPE;
121 return (i >= 0) ? _strings[i] : null;
122 }
123
124 public final String getValue(String uri, String localName) {
125 final int i = (getIndex(uri, localName) << 3) + VALUE;
126 return (i >= 0) ? _strings[i] : null;
127 }
128
129 public final void clear() {
130 if (_attributeCount > 0) {
131 for (int i = 0; i < _attributeCount; i++) {
132 _strings[(i << 3) + VALUE] = null;
133 }
134 _attributeCount = 0;
135 }
136 }
137
138
139 /**
140 * Add an attribute using a qualified name that contains the
141 * prefix and local name.
142 *
143 * @param uri
144 * This can be empty but not null, just like everywhere else in SAX.
145 */
146 public final void addAttributeWithQName(String uri, String localName, String qName, String type, String value) {
147 final int i = _attributeCount << 3;
148 if (i == _strings.length) {
149 resize(i);
150 }
151
152 _strings[i + PREFIX] = null;
153 _strings[i + URI] = uri;
154 _strings[i + LOCAL_NAME] = localName;
155 _strings[i + QNAME] = qName;
156 _strings[i + TYPE] = type;
157 _strings[i + VALUE] = value;
158
159 _attributeCount++;
160 }
161
162 /**
163 * Add an attribute using a prefix.
164 *
165 * @param prefix
166 * This can be empty but not null, just like everywhere else in SAX.
167 * @param uri
168 * This can be empty but not null, just like everywhere else in SAX.
169 */
170 public final void addAttributeWithPrefix(String prefix, String uri, String localName, String type, String value) {
171 final int i = _attributeCount << 3;
172 if (i == _strings.length) {
173 resize(i);
174 }
175
176 _strings[i + PREFIX] = prefix;
177 _strings[i + URI] = uri;
178 _strings[i + LOCAL_NAME] = localName;
179 _strings[i + QNAME] = null;
180 _strings[i + TYPE] = type;
181 _strings[i + VALUE] = value;
182
183 _attributeCount++;
184 }
185
186 private void resize(int length) {
187 final int newLength = length * 2;
188 final String[] strings = new String[newLength];
189 System.arraycopy(_strings, 0, strings, 0, length);
190 _strings = strings;
191 }
192
193 }