/**
* SPINdle (version 2.2.2)
* Copyright (C) 2009-2012 NICTA Ltd.
*
* This file is part of SPINdle project.
*
* SPINdle is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* SPINdle 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with SPINdle. If not, see <http://www.gnu.org/licenses/>.
*
* @author H.-P. Lam (oleklam@gmail.com), National ICT Australia - Queensland Research Laboratory
*/
package com.app.utils;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
public class FileManager {
public static String LINE_SEPARATOR = System.getProperty("line.separator");
public static String separator = System.getProperty("file.separator");
public static final int BUFFER_SIZE = 512;
public static String read(final File filename) throws IOException {
return new String(readBytes(new FileInputStream(filename)));
}
public static String read(final InputStream ins) throws IOException {
return new String(readBytes(ins));
}
public static byte[] readBytes(final InputStream ins) throws IOException {
if (null == ins) throw new IllegalArgumentException("input stream is null");
byte[] buffer = new byte[BUFFER_SIZE];
int len = 0;
BufferedInputStream in = null;
ByteArrayOutputStream baos = null;
in = new BufferedInputStream(ins, BUFFER_SIZE);
baos = new ByteArrayOutputStream();
try {
while ((len = in.read(buffer)) > 0) {
baos.write(buffer, 0, len);
}
return baos.toByteArray();
} catch (IOException e) {
throw e;
} catch (Exception e) {
throw new IOException(e);
} finally {
if (null != in) {
in.close();
in = null;
}
if (null != baos) {
baos.close();
baos = null;
}
}
}
public static Utilities.ProcessStatus write(final File filename, final String content) throws IOException {
writeBytes(new FileOutputStream(filename), content.getBytes());
return Utilities.ProcessStatus.SUCCESS;
}
public static void writeBytes(final OutputStream outs, final byte[] content) throws IOException {
int currLoc = 0;
int contentLen = content.length;
BufferedOutputStream out = null;
try {
out = new BufferedOutputStream(outs, BUFFER_SIZE);
while (currLoc < contentLen) {
int len = (contentLen > currLoc + BUFFER_SIZE) ? BUFFER_SIZE : contentLen - currLoc;
out.write(content, currLoc, len);
currLoc += len;
}
} catch (IOException e) {
throw e;
} catch (Exception e) {
throw new IOException(e);
} finally {
if (null != out) {
out.flush();
out.close();
out = null;
}
}
}
public static String getFileExtension(File filename) {
return getFileExtension(filename.toString());
}
public static String getFileExtension(String filename) {
if (filename == null || "".equals(filename.trim())) return "";
int sepLoc = filename.lastIndexOf(separator);
if (sepLoc < 0) sepLoc = 0;
int dotLoc = filename.indexOf(".", sepLoc);
return (dotLoc < 0) ? "" : filename.substring(dotLoc + 1).toLowerCase();
}
public static File changeFileExtension(final File file, String newExt) throws IOException {
if (file.isDirectory()) throw new IOException("[" + file + "] is a directory!");
String filename = file.getName();
String origExt = getFileExtension(file.getName());
if (newExt.equals(origExt)) return file;
if ("".equals(origExt)) {
return new File(file.getParent(), filename + "." + newExt);
} else {
String f = filename.substring(0, filename.length() - origExt.length());
return new File(file.getParent(), f + newExt);
}
}
public static File addFilenamePostfix(final File file, String postfix) throws IOException {
if (file.isDirectory()) throw new IOException("[" + file + "] is a directory!");
String filename = file.getName();
String origExt = getFileExtension(file.getName());
if ("".equals(origExt)) {
return new File(file.getParent(), filename + postfix);
} else {
String f = filename.substring(0, filename.length() - origExt.length() - 1);
String newExt = (origExt.startsWith(".")) ? origExt : "." + origExt;
return new File(file.getParent(), f + postfix + newExt);
}
}
public static void deleteFile(final File file) throws IOException {
if (!file.exists()) throw new IOException("file [" + file + "] does not exist");
File[] files = file.listFiles();
if (files != null) {
for (int i = 0; i < files.length; i++) {
if (files[i].isDirectory()) deleteFile(files[i]);
files[i].delete();
}
}
file.delete();
}
public static File[] listFiles(File file, Set<String> exts, int noOfLevels) {
FileSelector fs = null;
if (!(null == exts || exts.size() == 0)) {
fs = new FileSelector();
fs.addExt(exts);
}
List<File> files = listFiles(file, fs, noOfLevels);
return files.toArray(new File[files.size()]);
}
public static List<File> listFiles(File file, FileSelector fs, int noOfLevels) {
List<File> files = new ArrayList<File>();
if (!file.exists()) return files;
if (file.isDirectory()) {
if (noOfLevels == 0) {
File[] fileSet = null == fs ? file.listFiles() : file.listFiles(fs);
for (File f : fileSet) {
if (f.isFile()) files.add(f);
}
} else {
for (File f : file.listFiles()) {
if (f.isDirectory()) {
files.addAll(listFiles(f, fs, noOfLevels < 0 ? noOfLevels : noOfLevels - 1));
} else {
addFileToList(f, files, fs);
}
}
}
} else {
addFileToList(file, files, fs);
}
return files;
}
private static void addFileToList(File file, List<File> files, FileSelector fs) {
if (null == fs) {
files.add(file);
} else {
if (fs.accept(file, file.toString())) files.add(file);
}
}
}