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1: /* ProgressMonitorInputStream.java -- 2: Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc. 3: 4: This file is part of GNU Classpath. 5: 6: GNU Classpath is free software; you can redistribute it and/or modify 7: it under the terms of the GNU General Public License as published by 8: the Free Software Foundation; either version 2, or (at your option) 9: any later version. 10: 11: GNU Classpath is distributed in the hope that it will be useful, but 12: WITHOUT ANY WARRANTY; without even the implied warranty of 13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14: General Public License for more details. 15: 16: You should have received a copy of the GNU General Public License 17: along with GNU Classpath; see the file COPYING. If not, write to the 18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19: 02110-1301 USA. 20: 21: Linking this library statically or dynamically with other modules is 22: making a combined work based on this library. Thus, the terms and 23: conditions of the GNU General Public License cover the whole 24: combination. 25: 26: As a special exception, the copyright holders of this library give you 27: permission to link this library with independent modules to produce an 28: executable, regardless of the license terms of these independent 29: modules, and to copy and distribute the resulting executable under 30: terms of your choice, provided that you also meet, for each linked 31: independent module, the terms and conditions of the license of that 32: module. An independent module is a module which is not derived from 33: or based on this library. If you modify this library, you may extend 34: this exception to your version of the library, but you are not 35: obligated to do so. If you do not wish to do so, delete this 36: exception statement from your version. */ 37: 38: 39: package javax.swing; 40: 41: import java.awt.Component; 42: 43: import java.io.FilterInputStream; 44: import java.io.InputStream; 45: import java.io.InterruptedIOException; 46: import java.io.IOException; 47: 48: /** 49: * ProgressMonitorInputStream 50: * @author Andrew Selkirk 51: * @author Robert Schuster (robertschuster@fsfe.org) 52: * @status updated to 1.2 53: * @since 1.2 54: */ 55: public class ProgressMonitorInputStream extends FilterInputStream 56: { 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: }
GNU Classpath (0.20) |