public static void copyFile(File srcFile, File destFile) throws Exception {
int bufferSize = 2048;
FileInputStream in = new FileInputStream(srcFile);
FileOutputStream out = new FileOutputStream(destFile);
FileChannel inChannel = in.getChannel();
FileChannel outChannel = out.getChannel();
ByteBuffer buffer = null;
int length = -1;
try {
while (true) {
if (inChannel.position() == inChannel.size()) {
// finish copying
break;
} else if (inChannel.size() - inChannel.position() < length) {
// copy last chunk of data
length = (int) (inChannel.size() - inChannel.position());
} else {
length = bufferSize;
}
buffer = ByteBuffer.allocateDirect(length);
inChannel.read(buffer);
buffer.flip();
outChannel.write(buffer);
outChannel.force(false);
}
} finally {
_close(inChannel);
_close(in);
_close(outChannel);
_close(out);
}
}
public static long copyFile(java.nio.file.Path srcfile, java.nio.file.Path dstfile)
throws java.io.IOException {
java.nio.channels.FileChannel inchan =
java.nio.channels.FileChannel.open(srcfile, OPENOPTS_READ);
java.nio.channels.FileChannel outchan = null;
long nbytes = 0;
long filesize;
try {
filesize = inchan.size();
outchan = java.nio.channels.FileChannel.open(dstfile, OPENOPTS_CREATE_WRITE_TRUNC);
nbytes = outchan.transferFrom(inchan, 0, inchan.size());
} finally {
try {
inchan.close();
} catch (Exception ex) {
}
if (outchan != null)
try {
outchan.close();
} catch (Exception ex) {
}
}
if (nbytes != filesize)
throw new java.io.IOException(
"file-copy=" + nbytes + " vs " + filesize + " for " + srcfile + " => " + dstfile);
return nbytes;
}
/**
* Create a PerfDataBuffer instance for accessing the specified instrumentation buffer.
*
* @param vmid the <em>file:</em> URI to the instrumentation buffer file
* @throws MonitorException
*/
public PerfDataBuffer(VmIdentifier vmid) throws MonitorException {
File f = new File(vmid.getURI());
String mode = vmid.getMode();
try {
FileChannel fc = new RandomAccessFile(f, mode).getChannel();
ByteBuffer bb = null;
if (mode.compareTo("r") == 0) {
bb = fc.map(FileChannel.MapMode.READ_ONLY, 0L, (int) fc.size());
} else if (mode.compareTo("rw") == 0) {
bb = fc.map(FileChannel.MapMode.READ_WRITE, 0L, (int) fc.size());
} else {
throw new IllegalArgumentException("Invalid mode: " + mode);
}
fc.close(); // doesn't need to remain open
createPerfDataBuffer(bb, 0);
} catch (FileNotFoundException e) {
throw new MonitorException("Could not find " + vmid.toString());
} catch (IOException e) {
throw new MonitorException("Could not read " + vmid.toString());
}
}
public static BlockLink[] loadBlockMatches(String fileName) {
File f = new File(fileName);
if (!f.exists()) {
return null;
}
try {
FileChannel roChannel = new RandomAccessFile(f, "r").getChannel();
int count = (int) ((roChannel.size() - 1) / 6);
ByteBuffer buffer = roChannel.map(FileChannel.MapMode.READ_ONLY, 0, roChannel.size());
roChannel.close();
buffer.order(ByteOrder.LITTLE_ENDIAN);
if (buffer.get() != version) {
return null;
}
BlockLink[] links = new BlockLink[count];
for (int i = 0; i < links.length; i++) {
links[i] = new BlockLink(buffer.getShort(), buffer.get(), buffer.get(), buffer.getShort());
}
return links;
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
public boolean storeFilesUpgradeable(File neoStoreFile) {
File storeDirectory = neoStoreFile.getParentFile();
for (String fileName : fileNamesToExpectedVersions.keySet()) {
String expectedVersion = fileNamesToExpectedVersions.get(fileName);
FileChannel fileChannel = null;
byte[] expectedVersionBytes = UTF8.encode(expectedVersion);
try {
File storeFile = new File(storeDirectory, fileName);
if (!fs.fileExists(storeFile)) {
return false;
}
fileChannel = fs.open(storeFile, "r");
if (fileChannel.size() < expectedVersionBytes.length) {
return false;
}
fileChannel.position(fileChannel.size() - expectedVersionBytes.length);
byte[] foundVersionBytes = new byte[expectedVersionBytes.length];
fileChannel.read(ByteBuffer.wrap(foundVersionBytes));
if (!expectedVersion.equals(UTF8.decode(foundVersionBytes))) {
return false;
}
} catch (IOException e) {
throw new RuntimeException(e);
} finally {
if (fileChannel != null) {
try {
fileChannel.close();
} catch (IOException e) {
// Ignore exception on close
}
}
}
}
return true;
}
public void put(String key, String value) throws IOException {
int hash = hash(key);
int i = indexFor(hash, capacity);
int position = i * block_size;
WordBlock b = readWordBlock(position);
for (; b.nextPosition > 0; b = readWordBlock(b.nextPosition)) {
Object k;
if (hash(b.word) == hash && ((k = b.word) == key || key.equals(k))) {
b.translate = value;
writeWordBlock(b);
return;
}
}
if (b.nextPosition == 0) {
b = new WordBlock(b.position);
} else {
int nextPosition = 0;
if (fileChannel.size() > capacity * block_size) {
nextPosition = (int) fileChannel.size();
} else {
nextPosition = capacity * block_size;
}
System.out.println(key + " " + b.word);
b.nextPosition = nextPosition;
writeWordBlock(b);
b = new WordBlock(nextPosition);
}
b.word = key;
b.translate = value;
b.nextPosition = -1;
writeWordBlock(b);
}
private boolean loadFromFile() {
File GeoCrc = new File(fileName);
if (!GeoCrc.exists()) {
return false;
}
try {
FileChannel roChannel = new RandomAccessFile(GeoCrc, "r").getChannel();
if (roChannel.size() != GeoEngine.BLOCKS_IN_MAP * 4) {
roChannel.close();
return false;
}
ByteBuffer buffer = roChannel.map(FileChannel.MapMode.READ_ONLY, 0, roChannel.size());
roChannel.close();
buffer.order(ByteOrder.LITTLE_ENDIAN);
int[] _checkSums = new int[GeoEngine.BLOCKS_IN_MAP];
for (int i = 0; i < GeoEngine.BLOCKS_IN_MAP; i++) {
_checkSums[i] = buffer.getInt();
}
checkSums[geoX][geoY] = _checkSums;
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* Mapped File way MappedByteBuffer 可以在处理大文件时，提升性能
*
* @param filename
* @return
* @throws IOException
*/
public static byte[] toByteArray3(String filePath) throws IOException {
FileChannel fc = null;
RandomAccessFile rf = null;
try {
rf = new RandomAccessFile(filePath, "r");
fc = rf.getChannel();
MappedByteBuffer byteBuffer = fc.map(MapMode.READ_ONLY, 0, fc.size()).load();
// System.out.println(byteBuffer.isLoaded());
byte[] result = new byte[(int) fc.size()];
if (byteBuffer.remaining() > 0) {
// System.out.println("remain");
byteBuffer.get(result, 0, byteBuffer.remaining());
}
return result;
} catch (IOException e) {
e.printStackTrace();
throw e;
} finally {
try {
rf.close();
fc.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
public void write(Tag tag, RandomAccessFile raf, RandomAccessFile tempRaf)
throws CannotWriteException, IOException {
FileChannel fc = raf.getChannel();
int oldTagSize = 0;
if (tagExists(fc)) {
// read the length
if (!canOverwrite(raf))
throw new CannotWriteException("Overwritting of this kind of ID3v2 tag not supported yet");
fc.position(6);
ByteBuffer buf = ByteBuffer.allocate(4);
fc.read(buf);
oldTagSize = (buf.get(0) & 0xFF) << 21;
oldTagSize += (buf.get(1) & 0xFF) << 14;
oldTagSize += (buf.get(2) & 0xFF) << 7;
oldTagSize += buf.get(3) & 0xFF;
oldTagSize += 10;
// System.err.println("Old tag size: "+oldTagSize);
int newTagSize = tc.getTagLength(tag);
if (oldTagSize >= newTagSize) {
// replace
// System.err.println("Old ID32v Tag found, replacing the old
// tag");
fc.position(0);
fc.write(tc.convert(tag, oldTagSize - newTagSize));
// ID3v2 Tag Written
return;
}
}
// create new tag with padding
// System.err.println("Creating a new ID3v2 Tag");
fc.position(oldTagSize);
if (fc.size() > 15 * 1024 * 1024) {
FileChannel tempFC = tempRaf.getChannel();
tempFC.position(0);
tempFC.write(tc.convert(tag, Id3v2TagCreator.DEFAULT_PADDING));
tempFC.transferFrom(fc, tempFC.position(), fc.size() - oldTagSize);
fc.close();
} else {
ByteBuffer[] content = new ByteBuffer[2];
content[1] = ByteBuffer.allocate((int) fc.size());
fc.read(content[1]);
content[1].rewind();
content[0] = tc.convert(tag, Id3v2TagCreator.DEFAULT_PADDING);
fc.position(0);
fc.write(content);
}
}
private static void testExceptions(FileChannel fc) throws IOException {
checkException(fc, null, 0L, fc.size(), NullPointerException.class);
checkException(fc, MapMode.READ_ONLY, -1L, fc.size(), IllegalArgumentException.class);
checkException(
fc, null, -1L, fc.size(), IllegalArgumentException.class, NullPointerException.class);
checkException(fc, MapMode.READ_ONLY, 0L, -1L, IllegalArgumentException.class);
checkException(fc, null, 0L, -1L, IllegalArgumentException.class, NullPointerException.class);
checkException(
fc, MapMode.READ_ONLY, 0L, Integer.MAX_VALUE + 1L, IllegalArgumentException.class);
checkException(
fc,
null,
0L,
Integer.MAX_VALUE + 1L,
IllegalArgumentException.class,
NullPointerException.class);
checkException(fc, MapMode.READ_ONLY, Long.MAX_VALUE, 1L, IllegalArgumentException.class);
checkException(
fc, null, Long.MAX_VALUE, 1L, IllegalArgumentException.class, NullPointerException.class);
}
// from https://gist.github.com/889747
// TODO use Jakarta Commons IO..! This implementation needs to be improved.
private static void copyFile(File sourceFile, File destFile) throws IOException {
if (!destFile.exists()) {
destFile.createNewFile();
}
FileInputStream fIn = null;
FileOutputStream fOut = null;
FileChannel source = null;
FileChannel destination = null;
try {
fIn = new FileInputStream(sourceFile);
source = fIn.getChannel();
fOut = new FileOutputStream(destFile);
destination = fOut.getChannel();
long transfered = 0;
long bytes = source.size();
while (transfered < bytes) {
transfered += destination.transferFrom(source, 0, source.size());
destination.position(transfered);
}
} finally {
if (source != null) {
source.close();
} else if (fIn != null) {
fIn.close();
}
if (destination != null) {
destination.close();
} else if (fOut != null) {
fOut.close();
}
}
}
@Test
public void testSize() throws IOException {
RegularFile file = regularFile(10);
FileChannel channel = channel(file, READ);
assertEquals(10, channel.size());
file.write(10, new byte[90], 0, 90);
assertEquals(100, channel.size());
}
public void run() {
FileChannel channel = null;
ByteBuffer buffer = null;
buffer = ByteBuffer.allocate(262144);
if (this.logListener != null) this.logListener.inicioLog(null);
try {
while (isContinuar()) {
channel = new FileInputStream(this.arquivo).getChannel();
if (channel.size() > this.bytesLidos) {
int lidos = 0;
while ((lidos = channel.read(buffer, this.bytesLidos)) != -1) {
buffer.flip();
byte[] b = new byte[lidos];
buffer.get(b);
if (this.logListener != null) this.logListener.log(new String(b));
buffer.clear();
this.bytesLidos += lidos;
}
} else if (channel.size() < this.bytesLidos) {
this.bytesLidos = (this.arquivo.length() - 16384L);
if (this.bytesLidos < 0L) this.bytesLidos = 0L;
if (this.logListener != null)
this.logListener.log(
System.getProperty("line.separator")
+ "********Parte do arquivo foi apagada. Reinicializando leitura********"
+ System.getProperty("line.separator"));
}
try {
Thread.sleep(500L);
} catch (InterruptedException e) {
e.printStackTrace();
setContinuar(false);
}
channel.close();
}
} catch (IOException e) {
e.printStackTrace();
ByteArrayOutputStream bos = new ByteArrayOutputStream();
PrintStream s = new PrintStream(bos);
e.printStackTrace(s);
s.flush();
JOptionPane.showMessageDialog(null, new ErroPainel(new String(bos.toByteArray())), "Erro", 0);
} finally {
if ((channel != null) && (!channel.isOpen()))
try {
channel.close();
} catch (IOException localIOException1) {
}
}
}
public static void copyFile(File srcFile, File dstFile) {
if (!dstFile.exists()) {
try {
dstFile.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
}
FileChannel source = null;
FileChannel destination = null;
try {
source = new FileInputStream(srcFile).getChannel();
destination = new FileOutputStream(dstFile).getChannel();
destination.transferFrom(source, 0, source.size());
} catch (IOException e) {
e.printStackTrace();
} finally {
if (source != null) {
try {
source.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (destination != null) {
try {
destination.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
public long getContentLength() {
try {
return Math.min(mChunkSize, mChannel.size() - mChannel.position());
} catch (IOException e) {
return mChunkSize;
}
}
/** Reply a specific WAL. */
private void replayLog(Path logPath) throws KevaDBException {
// Now look at the disk.
if (logPath != null) {
// Get a list of the sstables already in place.
Map<String, Integer> manifest =
db.getDiskService().getDataManifests(db, 0, SSTableService.MAX_LEVELS);
FileLock fileLock = null;
try {
// Must open in "rw" mode so that we can use filelock.
FileChannel fc =
FileChannel.open(logPath, StandardOpenOption.READ, StandardOpenOption.WRITE);
MappedByteBuffer in = fc.map(FileChannel.MapMode.READ_ONLY, 0, (int) fc.size());
fileLock = fc.tryLock();
if (fileLock != null) {
for (; ; ) {
if (!unroll(in, manifest)) {
break;
}
}
}
if (fileLock != null) {
fileLock.release();
}
fc.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
private ByteList bufferedRead(int number) throws IOException, BadDescriptorException {
checkReadable();
ensureRead();
int resultSize = 0;
// 128K seems to be the minimum at which the stat+seek is faster than reallocation
final int BULK_THRESHOLD = 128 * 1024;
if (number >= BULK_THRESHOLD
&& descriptor.isSeekable()
&& descriptor.getChannel() instanceof FileChannel) {
//
// If it is a file channel, then we can pre-allocate the output buffer
// to the total size of buffered + remaining bytes in file
//
FileChannel fileChannel = (FileChannel) descriptor.getChannel();
resultSize =
(int)
Math.min(
fileChannel.size() - fileChannel.position() + bufferedInputBytesRemaining(),
number);
} else {
//
// Cannot discern the total read length - allocate at least enough for the buffered data
//
resultSize = Math.min(bufferedInputBytesRemaining(), number);
}
ByteList result = new ByteList(resultSize);
bufferedRead(result, number);
return result;
}
public String getFileBinaryBase64(String fileName) throws APIException {
if ((new File(fileName)).exists()) {
FileInputStream stream = null;
try {
stream = new FileInputStream(new File(fileName));
FileChannel fc = stream.getChannel();
MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
/* Instead of using default, pass in a decoder. */
byte[] b = new byte[bb.remaining()];
bb.get(b);
return Base64.encodeBytes(b);
} catch (Exception e) {
throw new APIException(fileName + " could not have its files extracte!");
} finally {
try {
stream.close();
} catch (Exception e) {
throw new APIException(fileName + " could not be closed!");
}
}
} else {
throw new APIException(fileName + " doesn't exist!");
}
}
/**
* Parses the FileChannel, in the range [start, end) and prints the elements found
*
* <p>Elements are printed, indented by "level" number of spaces. If an element is a container,
* then its contents will be, recursively, printed, with a greater indentation.
*
* @param fc
* @param level
* @param start
* @param end
* @throws IOException
*/
private void print(FileChannel fc, int level, long start, long end) throws IOException {
fc.position(start);
if (end <= 0) {
end = start + fc.size();
System.out.println("Setting END to " + end);
}
while (end - fc.position() > 8) {
long begin = fc.position();
ByteBuffer bb = ByteBuffer.allocate(8);
fc.read(bb);
bb.rewind();
long size = IsoTypeReader.readUInt32(bb);
String type = IsoTypeReader.read4cc(bb);
long fin = begin + size;
// indent by the required number of spaces
for (int i = 0; i < level; i++) {
System.out.print(" ");
}
System.out.println(type + "@" + (begin) + " size: " + size);
if (containers.contains(type)) {
print(fc, level + 1, begin + 8, fin);
if (fc.position() != fin) {
System.out.println("End of container contents at " + fc.position());
System.out.println(" FIN = " + fin);
}
} else {
}
fc.position(fin);
}
}
/**
* Based on <a href="http://www.screaming-penguin.com/node/7749">Backing up your Android SQLite
* database to the SD card</a>
*
* @param src
* @param dst
* @return true if success
* @throws IOException
*/
boolean copyFile(File src, File dst) throws IOException {
long sizeIn = -1;
long sizeCopied = 0;
boolean ok = false;
if (src != null && src.exists()) {
sizeIn = src.length();
if (!dst.createNewFile()) {
MyLog.e(this, "New file was not created: '" + dst.getCanonicalPath() + "'");
} else if (src.getCanonicalPath().compareTo(dst.getCanonicalPath()) == 0) {
MyLog.d(this, "Cannot copy to itself: '" + src.getCanonicalPath() + "'");
} else {
FileInputStream fileInputStream = null;
java.nio.channels.FileChannel inChannel = null;
FileOutputStream fileOutputStream = null;
java.nio.channels.FileChannel outChannel = null;
try {
fileInputStream = new FileInputStream(src);
inChannel = fileInputStream.getChannel();
fileOutputStream = new FileOutputStream(dst);
outChannel = fileOutputStream.getChannel();
sizeCopied = inChannel.transferTo(0, inChannel.size(), outChannel);
ok = (sizeIn == sizeCopied);
} finally {
DbUtils.closeSilently(outChannel);
DbUtils.closeSilently(fileOutputStream);
DbUtils.closeSilently(inChannel);
DbUtils.closeSilently(fileInputStream);
}
}
}
MyLog.d(this, "Copied " + sizeCopied + " bytes of " + sizeIn);
return ok;
}
public void run(String[] args) {
String script = null;
try {
FileInputStream stream = new FileInputStream(new File(args[0]));
try {
FileChannel fc = stream.getChannel();
MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
script = Charset.availableCharsets().get("UTF-8").decode(bb).toString();
} finally {
stream.close();
}
} catch (Exception ex) {
ex.printStackTrace();
System.exit(1);
}
Context cx = Context.enter();
try {
ScriptableObject scope = cx.initStandardObjects();
scope.putConst("language", scope, "java");
scope.putConst("platform", scope, "android");
scope.put("util", scope, new Util(cx, scope));
cx.evaluateString(scope, script, args[0], 1, null);
} catch (Error ex) {
ex.printStackTrace();
System.exit(1);
} catch (Exception ex) {
ex.printStackTrace();
System.exit(1);
} finally {
Context.exit();
}
System.exit(0);
}
private static long getRecord(String storeDir, long recordPosition) {
RandomAccessFile file = null;
try {
file = new RandomAccessFile(new File(storeDir), "rw");
FileChannel channel = file.getChannel();
/*
* We have to check size, because the store version
* field was introduced with 1.5, so if there is a non-clean
* shutdown we may have a buffer underflow.
*/
if (recordPosition > 3 && channel.size() < RECORD_SIZE * 5) {
return -1;
}
channel.position(RECORD_SIZE * recordPosition + 1 /*inUse*/);
ByteBuffer buffer = ByteBuffer.allocate(8);
channel.read(buffer);
buffer.flip();
long previous = buffer.getLong();
return previous;
} catch (IOException e) {
throw new RuntimeException(e);
} finally {
try {
if (file != null) file.close();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
public void writeRequest(final OutputStream out) throws IOException {
int readCount = 0;
Iterator<OnDatatransferProgressListener> it = null;
try {
mChannel.position(mOffset);
long size = mFile.length();
if (size == 0) size = -1;
long maxCount = Math.min(mOffset + mChunkSize, mChannel.size());
while (mChannel.position() < maxCount) {
readCount = mChannel.read(mBuffer);
out.write(mBuffer.array(), 0, readCount);
mBuffer.clear();
if (mTransferred < maxCount) { // condition to avoid accumulate progress for repeated chunks
mTransferred += readCount;
}
synchronized (mDataTransferListeners) {
it = mDataTransferListeners.iterator();
while (it.hasNext()) {
it.next().onTransferProgress(readCount, mTransferred, size, mFile.getName());
}
}
}
} catch (IOException io) {
Log.e(TAG, io.getMessage());
throw new RuntimeException(
"Ugly solution to workaround the default policy of retries when the server falls while uploading ; temporal fix; really",
io);
}
}
/*Function to read file */
public byte[] getFile(String fname) throws Exception {
/*FileInputStream and FileChannel for performance. */
FileInputStream in = new FileInputStream(fname);
FileChannel ch = in.getChannel();
MappedByteBuffer mb = ch.map(FileChannel.MapMode.READ_ONLY, 0L, ch.size());
long l = (new File(fname)).length();
/*Currently, supported max size is 20MB*/
if (l > MAX_SIZE) {
// errorMessage("File size too large. Max file size allowed
// is"+(Integer.MAX_VALUE/1000)+"KB");
return null;
}
byte[] barray = new byte[(int) l];
int nGet;
/*Read the file in to barray*/
while (mb.hasRemaining()) {
nGet = Math.min(mb.remaining(), Integer.MAX_VALUE);
mb.get(barray, 0, nGet);
}
if (in != null) in.close();
/*Return barray*/
return barray;
}
private void insertRecord(int recordPosition, long value) throws IOException {
try {
FileChannel channel = getFileChannel();
long previousPosition = channel.position();
channel.position(RECORD_SIZE * recordPosition);
int trail = (int) (channel.size() - channel.position());
ByteBuffer trailBuffer = null;
if (trail > 0) {
trailBuffer = ByteBuffer.allocate(trail);
channel.read(trailBuffer);
trailBuffer.flip();
}
ByteBuffer buffer = ByteBuffer.allocate(RECORD_SIZE);
buffer.put(Record.IN_USE.byteValue());
buffer.putLong(value);
buffer.flip();
channel.position(RECORD_SIZE * recordPosition);
channel.write(buffer);
if (trail > 0) {
channel.write(trailBuffer);
}
channel.position(previousPosition);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public void copy() {
try {
File sd = AndroidSensors.DataPath;
File data = Environment.getDataDirectory();
if (sd.exists() == false) sd.mkdirs();
String currentDBPath =
"//data//" + "winlab.sensoradventure" + "//databases//" + "InstantReading.db";
String backupDBPath = "InstantReading.db";
File currentDB = new File(data, currentDBPath);
File backupDB = new File(sd, backupDBPath);
FileChannel src = new FileInputStream(currentDB).getChannel();
FileChannel dst = new FileOutputStream(backupDB).getChannel();
dst.transferFrom(src, 0, src.size());
src.close();
dst.close();
Message msg = handler.obtainMessage();
msg.arg1 = 1;
handler.sendMessage(msg);
} catch (Exception e) {
Message msg = handler.obtainMessage();
msg.arg1 = 2;
handler.sendMessage(msg);
}
}
/**
* Internal copy file method.
*
* @param srcFile the validated source file, must not be <code>null</code>
* @param destFile the validated destination file, must not be <code>null</code>
* @throws IOException if an error occurs
*/
private static void doCopyFile(File srcFile, File destFile) throws IOException {
if (destFile.exists() && destFile.isDirectory()) {
throw new IOException("Destination '" + destFile + "' exists but is a directory");
}
FileInputStream fis = null;
FileOutputStream fos = null;
FileChannel input = null;
FileChannel output = null;
try {
fis = new FileInputStream(srcFile);
fos = new FileOutputStream(destFile);
input = fis.getChannel();
output = fos.getChannel();
long size = input.size();
long pos = 0;
long count = 0;
while (pos < size) {
count = (size - pos) > FIFTY_MB ? FIFTY_MB : (size - pos);
pos += output.transferFrom(input, pos, count);
}
} finally {
Streams.closeQuietly(output);
Streams.closeQuietly(fos);
Streams.closeQuietly(input);
Streams.closeQuietly(fis);
}
if (srcFile.length() != destFile.length()) {
throw new IOException(
"Failed to copy full contents from '" + srcFile + "' to '" + destFile + "'");
}
}
public static void copyFile(@NotNull File from, @NotNull File to, boolean append)
throws IOException {
FileInputStream in = null;
FileOutputStream out = null;
try {
out = createOutputStream(to, append);
in = new FileInputStream(from);
FileChannel readChannel = in.getChannel();
FileChannel writeChannel = out.getChannel();
long size = readChannel.size();
for (long position = 0; position < size; ) {
position += readChannel.transferTo(position, MB, writeChannel);
}
if (from.length() != to.length()) {
throw new IOException("Failed to copy full contents from " + from + " to " + to);
}
} finally {
close(in);
close(out);
}
}
public String getJsonFile() {
String jString = null;
try {
File dir = Environment.getExternalStorageDirectory();
File yourFile = new File(dir, "form.json");
FileInputStream stream = new FileInputStream(yourFile);
try {
FileChannel fc = stream.getChannel();
MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
/* Instead of using default, pass in a decoder. */
jString = Charset.defaultCharset().decode(bb).toString();
} finally {
stream.close();
}
jObject = new JSONObject(jString);
} catch (Exception e) {
e.printStackTrace();
}
return jObject.toString();
}
public boolean backupConfig(@NonNull String sourceString, @NonNull String destString) {
try {
File sourceFile = new File(sourceString);
File destFile = new File(destString);
if (!sourceFile.exists()) return false;
if (!destFile.exists()) destFile.createNewFile();
FileChannel source = null;
FileChannel destination = null;
try {
source = new FileInputStream(sourceFile).getChannel();
destination = new FileOutputStream(destFile).getChannel();
destination.transferFrom(source, 0, source.size());
} finally {
if (source != null) source.close();
if (destination != null) destination.close();
}
if (source != null) source.close();
if (destination != null) destination.close();
} catch (IOException ex) {
Warning.load("Cannot backup config: " + sourceString, false);
return false;
}
return true;
}
