Source Code Cross Referenced for FileUtils.java in  » Database-Client » executequery » org » underworldlabs » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database Client » executequery » org.underworldlabs.util 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * FileUtils.java
003:         *
004:         * Copyright (C) 2002, 2003, 2004, 2005, 2006 Takis Diakoumis
005:         *
006:         * This program is free software; you can redistribute it and/or
007:         * modify it under the terms of the GNU General Public License
008:         * as published by the Free Software Foundation; either version 2
009:         * of the License, or any later version.
010:         *
011:         * This program is distributed in the hope that it will be useful,
012:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
013:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
014:         * GNU General Public License for more details.
015:         *
016:         * You should have received a copy of the GNU General Public License
017:         * along with this program; if not, write to the Free Software
018:         * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
019:         *
020:         */
021:
022:        package org.underworldlabs.util;
023:
024:        import java.io.BufferedInputStream;
025:        import java.io.BufferedOutputStream;
026:        import java.io.BufferedReader;
027:        import java.io.File;
028:        import java.io.FileInputStream;
029:        import java.io.FileOutputStream;
030:        import java.io.FileReader;
031:        import java.io.FileWriter;
032:        import java.io.IOException;
033:        import java.io.InputStream;
034:        import java.io.ObjectInputStream;
035:        import java.io.ObjectOutputStream;
036:        import java.io.OutputStream;
037:        import java.io.PrintWriter;
038:        import java.util.Properties;
039:
040:        /* ----------------------------------------------------------
041:         * CVS NOTE: Changes to the CVS repository prior to the 
042:         *           release of version 3.0.0beta1 has meant a 
043:         *           resetting of CVS revision numbers.
044:         * ----------------------------------------------------------
045:         */
046:
047:        /**
048:         * File access utilities.
049:         *
050:         * @author   Takis Diakoumis
051:         * @version  $Revision: 1.5 $
052:         * @date     $Date: 2006/09/17 13:10:19 $
053:         */
054:        public class FileUtils {
055:
056:            private FileUtils() {
057:            }
058:
059:            public static boolean fileExists(String path) {
060:                File file = new File(path);
061:                return file.exists();
062:            }
063:
064:            public static void writeFile(String path, String text)
065:                    throws IOException {
066:                writeFile(new File(path), text, false);
067:            }
068:
069:            public static void writeFile(String path, String text,
070:                    boolean append) throws IOException {
071:                writeFile(new File(path), text, append);
072:            }
073:
074:            public static void writeFile(File file, String text)
075:                    throws IOException {
076:                writeFile(file, text, false);
077:            }
078:
079:            public static void writeFile(File file, String text, boolean append)
080:                    throws IOException {
081:                PrintWriter writer = null;
082:                try {
083:                    writer = new PrintWriter(new FileWriter(file, append), true);
084:                    writer.println(text);
085:                } finally {
086:                    if (writer != null) {
087:                        writer.close();
088:                    }
089:                }
090:            }
091:
092:            public static String loadFile(File file) throws IOException {
093:                return loadFile(file, true);
094:            }
095:
096:            public static String loadFile(String path) throws IOException {
097:                return loadFile(new File(path), true);
098:            }
099:
100:            public static String loadFile(String path, boolean escapeLines)
101:                    throws IOException {
102:                return loadFile(new File(path), escapeLines);
103:            }
104:
105:            public static String loadFile(File file, boolean escapeLines)
106:                    throws IOException {
107:                FileReader fileReader = null;
108:                BufferedReader reader = null;
109:
110:                try {
111:                    fileReader = new FileReader(file);
112:                    reader = new BufferedReader(fileReader);
113:
114:                    String value = null;
115:                    StringBuffer sb = new StringBuffer();
116:
117:                    while ((value = reader.readLine()) != null) {
118:                        sb.append(value);
119:
120:                        if (escapeLines) {
121:                            sb.append('\n');
122:                        }
123:
124:                    }
125:
126:                    return sb.toString();
127:                } finally {
128:                    if (reader != null) {
129:                        reader.close();
130:                    }
131:                    if (fileReader != null) {
132:                        fileReader.close();
133:                    }
134:                }
135:            }
136:
137:            public static String loadResource(String path) throws IOException {
138:                InputStream input = null;
139:
140:                try {
141:                    ClassLoader cl = FileUtils.class.getClassLoader();
142:
143:                    if (cl != null) {
144:                        input = cl.getResourceAsStream(path);
145:                    } else {
146:                        input = ClassLoader.getSystemResourceAsStream(path);
147:                    }
148:
149:                    int i = 0;
150:                    StringBuffer buf = new StringBuffer();
151:
152:                    while ((i = input.read()) != -1) {
153:                        buf.append((char) i);
154:                    }
155:
156:                    return buf.toString();
157:                } finally {
158:                    if (input != null) {
159:                        input.close();
160:                    }
161:                }
162:            }
163:
164:            public static Properties loadProperties(String path,
165:                    Properties defaults) throws IOException {
166:                return loadProperties(new File(path), defaults);
167:            }
168:
169:            public static Properties loadProperties(File file,
170:                    Properties defaults) throws IOException {
171:                InputStream input = null;
172:
173:                try {
174:                    Properties properties = null;
175:
176:                    if (defaults != null) {
177:                        properties = new Properties(defaults);
178:                    } else {
179:                        properties = new Properties();
180:                    }
181:
182:                    input = new FileInputStream(file);
183:                    properties.load(input);
184:                    return properties;
185:                } finally {
186:                    if (input != null) {
187:                        input.close();
188:                    }
189:                }
190:
191:            }
192:
193:            public static Properties loadProperties(String path)
194:                    throws IOException {
195:                return loadProperties(new File(path), null);
196:            }
197:
198:            public static Properties loadProperties(File file)
199:                    throws IOException {
200:                return loadProperties(file, null);
201:            }
202:
203:            public static void storeProperties(String path,
204:                    Properties properties, String header) throws IOException {
205:                storeProperties(new File(path), properties, header);
206:            }
207:
208:            public static void storeProperties(File file,
209:                    Properties properties, String header) throws IOException {
210:                FileOutputStream output = null;
211:                try {
212:                    output = new FileOutputStream(file);
213:                    properties.store(output, header);
214:                } finally {
215:                    if (output != null) {
216:                        output.close();
217:                    }
218:                }
219:            }
220:
221:            public static Properties loadPropertiesResource(String path)
222:                    throws IOException {
223:                InputStream input = null;
224:
225:                try {
226:                    ClassLoader cl = FileUtils.class.getClassLoader();
227:
228:                    if (cl != null) {
229:                        input = cl.getResourceAsStream(path);
230:                    } else {
231:                        input = ClassLoader.getSystemResourceAsStream(path);
232:                    }
233:
234:                    Properties properties = new Properties();
235:                    properties.load(input);
236:                    input.close();
237:                    return properties;
238:                } finally {
239:                    if (input != null) {
240:                        input.close();
241:                    }
242:                }
243:            }
244:
245:            public static Object readObject(String path) throws IOException {
246:                return readObject(new File(path));
247:            }
248:
249:            public static Object readObject(File file) throws IOException {
250:                FileInputStream fileIn = null;
251:                BufferedInputStream buffIn = null;
252:                ObjectInputStream obIn = null;
253:
254:                try {
255:                    fileIn = new FileInputStream(file);
256:                    buffIn = new BufferedInputStream(fileIn);
257:                    obIn = new ObjectInputStream(buffIn);
258:                    return obIn.readObject();
259:                } catch (ClassNotFoundException cExc) {
260:                    cExc.printStackTrace();
261:                    return null;
262:                } finally {
263:                    try {
264:                        if (obIn != null) {
265:                            obIn.close();
266:                        }
267:                        if (buffIn != null) {
268:                            buffIn.close();
269:                        }
270:                        if (fileIn != null) {
271:                            fileIn.close();
272:                        }
273:                    } catch (IOException e) {
274:                    }
275:                }
276:            }
277:
278:            public static void writeObject(Object object, String path)
279:                    throws IOException {
280:                FileOutputStream fileOut = null;
281:                BufferedOutputStream bufferedOut = null;
282:                ObjectOutputStream obOut = null;
283:
284:                try {
285:                    fileOut = new FileOutputStream(path);
286:                    bufferedOut = new BufferedOutputStream(fileOut);
287:                    obOut = new ObjectOutputStream(bufferedOut);
288:                    obOut.writeObject(object);
289:                } finally {
290:                    try {
291:                        if (bufferedOut != null) {
292:                            bufferedOut.close();
293:                        }
294:                        if (obOut != null) {
295:                            obOut.close();
296:                        }
297:                        if (fileOut != null) {
298:                            fileOut.close();
299:                        }
300:                    } catch (IOException e) {
301:                    }
302:                }
303:
304:            }
305:
306:            /** default buffer read size */
307:            private static int defaultBufferSize = 32768;
308:
309:            /**
310:             * Copies the file at the specified from path to the 
311:             * specified to path.
312:             *
313:             * @param from  - the from path
314:             * @param to  - the to path
315:             * @throws IOException
316:             */
317:            public static void copyResource(String from, String to)
318:                    throws IOException {
319:                InputStream in = null;
320:                OutputStream out = null;
321:
322:                try {
323:                    ClassLoader cl = FileUtils.class.getClassLoader();
324:
325:                    if (cl != null) {
326:                        in = cl.getResourceAsStream(from);
327:                    } else {
328:                        in = ClassLoader.getSystemResourceAsStream(from);
329:                    }
330:
331:                    out = new FileOutputStream(to);
332:
333:                    byte[] buffer = new byte[defaultBufferSize];
334:                    while (true) {
335:                        synchronized (buffer) {
336:                            int amountRead = in.read(buffer);
337:                            if (amountRead == -1) {
338:                                break;
339:                            }
340:                            out.write(buffer, 0, amountRead);
341:                        }
342:                    }
343:
344:                } finally {
345:                    if (in != null) {
346:                        in.close();
347:                    }
348:                    if (out != null) {
349:                        out.close();
350:                    }
351:                }
352:            }
353:
354:            public static void copyFile(String from, String to)
355:                    throws IOException {
356:                InputStream in = null;
357:                OutputStream out = null;
358:
359:                try {
360:                    in = new FileInputStream(from);
361:                    out = new FileOutputStream(to);
362:
363:                    byte[] buffer = new byte[defaultBufferSize];
364:                    while (true) {
365:                        synchronized (buffer) {
366:                            int amountRead = in.read(buffer);
367:                            if (amountRead == -1) {
368:                                break;
369:                            }
370:                            out.write(buffer, 0, amountRead);
371:                        }
372:                    }
373:
374:                } finally {
375:                    if (in != null) {
376:                        in.close();
377:                    }
378:                    if (out != null) {
379:                        out.close();
380:                    }
381:                }
382:            }
383:
384:        }
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