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 * Copyright (C) 2004-2011
27 *
28 * Permission is hereby granted, free of charge, to any person obtaining a copy
29 * of this software and associated documentation files (the "Software"), to deal
30 * in the Software without restriction, including without limitation the rights
31 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
32 * copies of the Software, and to permit persons to whom the Software is
33 * furnished to do so, subject to the following conditions:
34 *
35 * The above copyright notice and this permission notice shall be included in
36 * all copies or substantial portions of the Software.
37 *
38 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
39 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
40 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
41 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
42 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
43 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
44 * THE SOFTWARE.
45 */
46 package com.sun.xml.internal.rngom.binary;
47
48 final class PatternInterner {
49 private static final int INIT_SIZE = 256;
50 private static final float LOAD_FACTOR = 0.3f;
51 private Pattern[] table;
52 private int used;
53 private int usedLimit;
54
55 PatternInterner() {
56 table = null;
57 used = 0;
58 usedLimit = 0;
59 }
60
61 PatternInterner(PatternInterner parent) {
62 table = parent.table;
63 if (table != null)
64 table = (Pattern[]) table.clone();
65 used = parent.used;
66 usedLimit = parent.usedLimit;
67 }
68
69 @SuppressWarnings("empty-statement")
70 Pattern intern(Pattern p) {
71 int h;
72
73 if (table == null) {
74 table = new Pattern[INIT_SIZE];
75 usedLimit = (int) (INIT_SIZE * LOAD_FACTOR);
76 h = firstIndex(p);
77 } else {
78 for (h = firstIndex(p); table[h] != null; h = nextIndex(h)) {
79 if (p.samePattern(table[h]))
80 return table[h];
81 }
82 }
83 if (used >= usedLimit) {
84 // rehash
85 Pattern[] oldTable = table;
86 table = new Pattern[table.length << 1];
87 for (int i = oldTable.length; i > 0;) {
88 --i;
89 if (oldTable[i] != null) {
|
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.rngom.binary;
27
28 final class PatternInterner {
29 private static final int INIT_SIZE = 256;
30 private static final float LOAD_FACTOR = 0.3f;
31 private Pattern[] table;
32 private int used;
33 private int usedLimit;
34
35 PatternInterner() {
36 table = null;
37 used = 0;
38 usedLimit = 0;
39 }
40
41 PatternInterner(PatternInterner parent) {
42 table = parent.table;
43 if (table != null)
44 table = (Pattern[]) table.clone();
45 used = parent.used;
46 usedLimit = parent.usedLimit;
47 }
48
49 Pattern intern(Pattern p) {
50 int h;
51
52 if (table == null) {
53 table = new Pattern[INIT_SIZE];
54 usedLimit = (int) (INIT_SIZE * LOAD_FACTOR);
55 h = firstIndex(p);
56 } else {
57 for (h = firstIndex(p); table[h] != null; h = nextIndex(h)) {
58 if (p.samePattern(table[h]))
59 return table[h];
60 }
61 }
62 if (used >= usedLimit) {
63 // rehash
64 Pattern[] oldTable = table;
65 table = new Pattern[table.length << 1];
66 for (int i = oldTable.length; i > 0;) {
67 --i;
68 if (oldTable[i] != null) {
|