1 |
/* ProgressMonitorInputStream.java -- |
/* ProgressMonitorInputStream.java -- |
2 |
Copyright (C) 2002, 2004 Free Software Foundation, Inc. |
Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc. |
3 |
|
|
4 |
This file is part of GNU Classpath. |
This file is part of GNU Classpath. |
5 |
|
|
39 |
package javax.swing; |
package javax.swing; |
40 |
|
|
41 |
import java.awt.Component; |
import java.awt.Component; |
42 |
|
|
43 |
import java.io.FilterInputStream; |
import java.io.FilterInputStream; |
|
import java.io.IOException; |
|
44 |
import java.io.InputStream; |
import java.io.InputStream; |
45 |
|
import java.io.InterruptedIOException; |
46 |
|
import java.io.IOException; |
47 |
|
|
48 |
/** |
/** |
49 |
* ProgressMonitorInputStream |
* ProgressMonitorInputStream |
50 |
* @author Andrew Selkirk |
* @author Andrew Selkirk |
51 |
* @version 1.0 |
* @author Robert Schuster (robertschuster@fsfe.org) |
52 |
|
* @status updated to 1.2 |
53 |
|
* @since 1.2 |
54 |
*/ |
*/ |
55 |
public class ProgressMonitorInputStream extends FilterInputStream { |
public class ProgressMonitorInputStream extends FilterInputStream |
56 |
|
{ |
|
//------------------------------------------------------------- |
|
|
// Variables -------------------------------------------------- |
|
|
//------------------------------------------------------------- |
|
|
|
|
|
/** |
|
|
* monitor |
|
|
*/ |
|
|
private ProgressMonitor monitor; |
|
|
|
|
|
/** |
|
|
* nread |
|
|
*/ |
|
|
private int nread; |
|
|
|
|
|
/** |
|
|
* size |
|
|
*/ |
|
|
private int size; |
|
|
|
|
|
|
|
|
//------------------------------------------------------------- |
|
|
// Initialization --------------------------------------------- |
|
|
//------------------------------------------------------------- |
|
|
|
|
|
/** |
|
|
* Constructor ProgressMonitorInputStream |
|
|
* @param component TODO |
|
|
* @param message TODO |
|
|
* @param stream TODO |
|
|
*/ |
|
|
public ProgressMonitorInputStream(Component component, Object message, |
|
|
InputStream stream) { |
|
|
super(stream); |
|
|
// TODO |
|
|
} // ProgressMonitorInputStream() |
|
|
|
|
|
|
|
|
//------------------------------------------------------------- |
|
|
// Methods ---------------------------------------------------- |
|
|
//------------------------------------------------------------- |
|
|
|
|
|
/** |
|
|
* reset |
|
|
* @exception IOException TODO |
|
|
*/ |
|
|
public synchronized void reset() throws IOException { |
|
|
// TODO |
|
|
} // reset() |
|
|
|
|
|
/** |
|
|
* read |
|
|
* @exception IOException TODO |
|
|
* @returns int |
|
|
*/ |
|
|
public int read() throws IOException { |
|
|
return 0; // TODO |
|
|
} // read() |
|
|
|
|
|
/** |
|
|
* read |
|
|
* @param data TODO |
|
|
* @exception IOException TODO |
|
|
* @returns int |
|
|
*/ |
|
|
public int read(byte[] data) throws IOException { |
|
|
return 0; // TODO |
|
|
} // read() |
|
|
|
|
|
/** |
|
|
* read |
|
|
* @param data TODO |
|
|
* @param offset TODO |
|
|
* @param length TODO |
|
|
* @exception IOException TODO |
|
|
* @returns int |
|
|
*/ |
|
|
public int read(byte[] data, int offset, int length) throws IOException { |
|
|
return 0; // TODO |
|
|
} // read() |
|
|
|
|
|
/** |
|
|
* skip |
|
|
* @param length TODO |
|
|
* @exception IOException TODO |
|
|
* @returns long |
|
|
*/ |
|
|
public long skip(long length) throws IOException { |
|
|
return 0; // TODO |
|
|
} // skip() |
|
|
|
|
|
/** |
|
|
* close |
|
|
* @exception IOException TODO |
|
|
*/ |
|
|
public void close() throws IOException { |
|
|
// TODO |
|
|
} // close() |
|
|
|
|
|
/** |
|
|
* getProgressMonitor |
|
|
* @returns ProgressMonitor |
|
|
*/ |
|
|
public ProgressMonitor getProgressMonitor() { |
|
|
return null; // TODO |
|
|
} // getProgressMonitor() |
|
57 |
|
|
58 |
|
/** |
59 |
|
* monitor |
60 |
|
*/ |
61 |
|
private ProgressMonitor monitor; |
62 |
|
|
63 |
|
/** |
64 |
|
* read |
65 |
|
*/ |
66 |
|
private int read; |
67 |
|
|
68 |
|
/** |
69 |
|
* Constructor ProgressMonitorInputStream |
70 |
|
* @param component TODO |
71 |
|
* @param message TODO |
72 |
|
* @param stream TODO |
73 |
|
*/ |
74 |
|
public ProgressMonitorInputStream(Component component, Object message, |
75 |
|
InputStream stream) |
76 |
|
{ |
77 |
|
super(stream); |
78 |
|
|
79 |
|
int max = 0; |
80 |
|
|
81 |
|
try |
82 |
|
{ |
83 |
|
max = stream.available(); |
84 |
|
} |
85 |
|
catch ( IOException ioe ) |
86 |
|
{ |
87 |
|
// Behave like the JDK here. |
88 |
|
} |
89 |
|
|
90 |
|
monitor = new ProgressMonitor( |
91 |
|
component, message, null, 0, max ); |
92 |
|
} |
93 |
|
|
94 |
|
/** |
95 |
|
* reset |
96 |
|
* @exception IOException TODO |
97 |
|
*/ |
98 |
|
public void reset() throws IOException |
99 |
|
{ |
100 |
|
super.reset(); |
101 |
|
|
102 |
|
checkMonitorCanceled(); |
103 |
|
|
104 |
|
// TODO: The docs says the monitor should be resetted. But to which |
105 |
|
// value? (mark is not overridden) |
106 |
|
} |
107 |
|
|
108 |
|
/** |
109 |
|
* read |
110 |
|
* @exception IOException TODO |
111 |
|
* @returns int |
112 |
|
*/ |
113 |
|
public int read() throws IOException |
114 |
|
{ |
115 |
|
int t = super.read(); |
116 |
|
|
117 |
|
monitor.setProgress(++read); |
118 |
|
|
119 |
|
checkMonitorCanceled(); |
120 |
|
|
121 |
|
return t; |
122 |
|
} |
123 |
|
|
124 |
|
/** |
125 |
|
* read |
126 |
|
* @param data TODO |
127 |
|
* @exception IOException TODO |
128 |
|
* @returns int |
129 |
|
*/ |
130 |
|
public int read(byte[] data) throws IOException |
131 |
|
{ |
132 |
|
int t = super.read(data); |
133 |
|
|
134 |
|
if ( t > 0 ) |
135 |
|
{ |
136 |
|
read += t; |
137 |
|
monitor.setProgress(read); |
138 |
|
|
139 |
|
checkMonitorCanceled(); |
140 |
|
} |
141 |
|
else |
142 |
|
{ |
143 |
|
monitor.close(); |
144 |
|
} |
145 |
|
|
146 |
|
return t; |
147 |
|
} |
148 |
|
|
149 |
|
/** |
150 |
|
* read |
151 |
|
* @param data TODO |
152 |
|
* @param offset TODO |
153 |
|
* @param length TODO |
154 |
|
* @exception IOException TODO |
155 |
|
* @returns int |
156 |
|
*/ |
157 |
|
public int read(byte[] data, int offset, int length) throws IOException |
158 |
|
{ |
159 |
|
int t = super.read(data, offset, length); |
160 |
|
|
161 |
|
if ( t > 0 ) |
162 |
|
{ |
163 |
|
read += t; |
164 |
|
monitor.setProgress(read); |
165 |
|
|
166 |
|
checkMonitorCanceled(); |
167 |
|
} |
168 |
|
else |
169 |
|
{ |
170 |
|
monitor.close(); |
171 |
|
} |
172 |
|
|
173 |
|
return t; |
174 |
|
} |
175 |
|
|
176 |
|
/** |
177 |
|
* skip |
178 |
|
* @param length TODO |
179 |
|
* @exception IOException TODO |
180 |
|
* @returns long |
181 |
|
*/ |
182 |
|
public long skip(long length) throws IOException |
183 |
|
{ |
184 |
|
long t = super.skip(length); |
185 |
|
|
186 |
|
// 'read' may overflow here in rare situations. |
187 |
|
assert ( (long) read + t <= (long) Integer.MAX_VALUE ); |
188 |
|
|
189 |
|
read += (int) t; |
190 |
|
|
191 |
|
monitor.setProgress(read); |
192 |
|
|
193 |
|
checkMonitorCanceled(); |
194 |
|
|
195 |
|
return t; |
196 |
|
} |
197 |
|
|
198 |
|
/** |
199 |
|
* close |
200 |
|
* @exception IOException TODO |
201 |
|
*/ |
202 |
|
public void close() throws IOException |
203 |
|
{ |
204 |
|
super.close(); |
205 |
|
monitor.close(); |
206 |
|
} |
207 |
|
|
208 |
|
/** |
209 |
|
* getProgressMonitor |
210 |
|
* @returns ProgressMonitor |
211 |
|
*/ |
212 |
|
public ProgressMonitor getProgressMonitor() |
213 |
|
{ |
214 |
|
return monitor; |
215 |
|
} |
216 |
|
|
217 |
|
private void checkMonitorCanceled() throws InterruptedIOException |
218 |
|
{ |
219 |
|
if ( monitor.isCanceled() ) |
220 |
|
{ |
221 |
|
throw new InterruptedIOException("ProgressMonitor was canceled"); |
222 |
|
} |
223 |
|
} |
224 |
|
|
225 |
} // ProgressMonitorInputStream |
} |