1 /*
2 * Copyright (c) 2003, 2015, 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 /*
27 *******************************************************************************
28 * Copyright (C) 1996-2014, International Business Machines Corporation and
29 * others. All Rights Reserved.
30 *******************************************************************************
31 */
32
33 package sun.text.normalizer;
34
35 import java.io.BufferedInputStream;
36 import java.io.DataInputStream;
37 import java.io.File;
38 import java.io.FileInputStream;
39 import java.io.InputStream;
40 import java.io.IOException;
41 import java.io.UncheckedIOException;
42 import java.net.URL;
43 import java.nio.ByteBuffer;
44 import java.nio.ByteOrder;
45 import java.nio.channels.FileChannel;
46 import java.nio.file.FileSystems;
47 import java.util.Arrays;
48 import java.security.AccessController;
49 import java.security.PrivilegedAction;
50
51 public final class ICUBinary {
52
53 private static final class IsAcceptable implements Authenticate {
54 // @Override when we switch to Java 6
55 public boolean isDataVersionAcceptable(byte version[]) {
56 return version[0] == 1;
57 }
58 }
59
60 // public inner interface ------------------------------------------------
61
62 /**
63 * Special interface for data authentication
64 */
65 public static interface Authenticate
66 {
67 /**
68 * Method used in ICUBinary.readHeader() to provide data format
69 * authentication.
70 * @param version version of the current data
71 * @return true if dataformat is an acceptable version, false otherwise
72 */
73 public boolean isDataVersionAcceptable(byte version[]);
74 }
76 // public methods --------------------------------------------------------
77
78 /**
79 * Loads an ICU binary data file and returns it as a ByteBuffer.
80 * The buffer contents is normally read-only, but its position etc. can be modified.
81 *
82 * @param itemPath Relative ICU data item path, for example "root.res" or "coll/ucadata.icu".
83 * @return The data as a read-only ByteBuffer.
84 */
85 public static ByteBuffer getRequiredData(String itemPath) {
86 final Class<ICUBinary> root = ICUBinary.class;
87
88 try (InputStream is = AccessController.doPrivileged(new PrivilegedAction<InputStream>() {
89 public InputStream run() {
90 return root.getResourceAsStream(itemPath);
91 }
92 })) {
93
94 BufferedInputStream b=new BufferedInputStream(is, 4096 /* data buffer size */);
95 DataInputStream inputStream = new DataInputStream(b);
96 byte[] bb = new byte[120000];
97 int n = inputStream.read(bb);
98 ByteBuffer bytes = ByteBuffer.wrap(bb, 0, n);
99 return bytes;
100 }
101 catch (IOException e) {
102 throw new UncheckedIOException(e);
103 }
104 }
105
106 /**
107 * Same as readHeader(), but returns a VersionInfo rather than a compact int.
108 */
109 public static VersionInfo readHeaderAndDataVersion(ByteBuffer bytes,
110 int dataFormat,
111 Authenticate authenticate)
112 throws IOException {
113 return getVersionInfoFromCompactInt(readHeader(bytes, dataFormat, authenticate));
114 }
115
116 private static final byte BIG_ENDIAN_ = 1;
|
1 /*
2 * Copyright (c) 2003, 2018, 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 /*
27 *******************************************************************************
28 * Copyright (C) 1996-2014, International Business Machines Corporation and
29 * others. All Rights Reserved.
30 *******************************************************************************
31 */
32
33 package sun.text.normalizer;
34
35 import java.io.BufferedInputStream;
36 import java.io.DataInputStream;
37 import java.io.InputStream;
38 import java.io.IOException;
39 import java.io.UncheckedIOException;
40 import java.nio.ByteBuffer;
41 import java.nio.ByteOrder;
42 import java.util.Arrays;
43 import java.security.AccessController;
44 import java.security.PrivilegedAction;
45
46 public final class ICUBinary {
47
48 private static final class IsAcceptable implements Authenticate {
49 @Override
50 public boolean isDataVersionAcceptable(byte version[]) {
51 return version[0] == 1;
52 }
53 }
54
55 // public inner interface ------------------------------------------------
56
57 /**
58 * Special interface for data authentication
59 */
60 public static interface Authenticate
61 {
62 /**
63 * Method used in ICUBinary.readHeader() to provide data format
64 * authentication.
65 * @param version version of the current data
66 * @return true if dataformat is an acceptable version, false otherwise
67 */
68 public boolean isDataVersionAcceptable(byte version[]);
69 }
71 // public methods --------------------------------------------------------
72
73 /**
74 * Loads an ICU binary data file and returns it as a ByteBuffer.
75 * The buffer contents is normally read-only, but its position etc. can be modified.
76 *
77 * @param itemPath Relative ICU data item path, for example "root.res" or "coll/ucadata.icu".
78 * @return The data as a read-only ByteBuffer.
79 */
80 public static ByteBuffer getRequiredData(String itemPath) {
81 final Class<ICUBinary> root = ICUBinary.class;
82
83 try (InputStream is = AccessController.doPrivileged(new PrivilegedAction<InputStream>() {
84 public InputStream run() {
85 return root.getResourceAsStream(itemPath);
86 }
87 })) {
88
89 BufferedInputStream b=new BufferedInputStream(is, 4096 /* data buffer size */);
90 DataInputStream inputStream = new DataInputStream(b);
91 byte[] bb = new byte[130000];
92 int n = inputStream.read(bb);
93 ByteBuffer bytes = ByteBuffer.wrap(bb, 0, n);
94 return bytes;
95 }
96 catch (IOException e) {
97 throw new UncheckedIOException(e);
98 }
99 }
100
101 /**
102 * Same as readHeader(), but returns a VersionInfo rather than a compact int.
103 */
104 public static VersionInfo readHeaderAndDataVersion(ByteBuffer bytes,
105 int dataFormat,
106 Authenticate authenticate)
107 throws IOException {
108 return getVersionInfoFromCompactInt(readHeader(bytes, dataFormat, authenticate));
109 }
110
111 private static final byte BIG_ENDIAN_ = 1;
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