1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
/*
* @(#)MemoryRAFFile.java 1.12 06/10/30
*
* Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
/*
* @(#) MemoryRAFFile.java 1.12 - last change made 10/30/06
*/
package com.sun.java.help.search;
/**
* A DICT (Dictionary) file cached in memory.
*
* @author Roger D. Brinkley
* @version 1.12 10/30/06
*/
import java.net.URL;
import java.net.URLConnection;
import java.io.IOException;
import java.io.InputStream;
import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.EOFException;
public class MemoryRAFFile extends RAFFile {
private URL url;
private byte[] data;
private int size;
private int filePointer;
public MemoryRAFFile(URLConnection connection) throws IOException {
this.url = connection.getURL();
InputStream in = new BufferedInputStream(connection.getInputStream());
ByteArrayOutputStream data = new ByteArrayOutputStream();
byte[] buf = new byte[512];
int i = 0;
while((i = in.read(buf)) != -1) {
data.write(buf, 0, i);
}
this.data = data.toByteArray();
size = data.size();
filePointer = 0;
}
public long length() {
return size;
}
public void close() throws IOException {
filePointer = 0;
data = null;
size = 0;
}
public long getFilePointer() throws IOException {
return filePointer;
}
public void seek(long pos) throws IOException {
if (pos > size) {
throw new IOException();
}
filePointer = (int)pos;
}
public int read() throws IOException {
if (filePointer >= size) {
return -1;
}
filePointer += 1;
return data[filePointer - 1] & 0xFF;
}
private int readBytes(byte b[], int off, int len) throws IOException {
debug ("readBytes");
if (filePointer + off + len > size) {
throw new IOException();
}
filePointer += off;
System.arraycopy(data, filePointer, b, 0, (int)len);
filePointer += len;
return len;
}
public int read(byte b[], int off, int len) throws IOException {
return readBytes(b, off, len);
}
public int readInt() throws IOException {
debug ("readInt");
int ch1 = this.read();
int ch2 = this.read();
int ch3 = this.read();
int ch4 = this.read();
if ((ch1 | ch2 | ch3 | ch4) < 0)
throw new EOFException();
return ((ch1 << 24) + (ch2 << 16) + (ch3 << 8) + (ch4 << 0));
}
public final void readFully(byte b[]) throws IOException {
readFully(b, 0, b.length);
}
private void readFully (byte b[], int off, int len)
throws IOException {
int n = 0;
do {
int count = this.read(b, off + n, len - n);
if (count < 0)
throw new EOFException();
n += count;
} while (n < len);
}
public void writeInt(int v) throws IOException {
throw new IOException("Unsupported Operation");
}
public void write(byte b[]) throws IOException {
throw new IOException("Unsupported Operation");
}
/**
* For printf debugging.
*/
private static boolean debugFlag = false;
private static void debug(String str) {
if( debugFlag ) {
System.out.println("MemoryRAFFile: " + str);
}
}
}
|
