| Code with Finding: |
class Directory {
/**
* Copy contents of a directory src to a directory dest.
* If a file in src already exists in dest then the
* one in dest will be blindly overwritten.
*
* <p><b>NOTE:</b> the source directory cannot change
* while this method is running. Otherwise the results
* are undefined and you could easily hit a
* FileNotFoundException.
*
* <p><b>NOTE:</b> this method only copies files that look
* like index files (ie, have extensions matching the
* known extensions of index files).
*
* @param src source directory
* @param dest destination directory
* @param closeDirSrc if <code>true</code>, call {@link #close()} method on source directory
* @throws IOException
*/
public static void copy(Directory src, Directory dest, boolean closeDirSrc) throws IOException {
final String[] files = src.listAll();
IndexFileNameFilter filter = IndexFileNameFilter.getFilter();
byte[] buf = new byte[BufferedIndexOutput.BUFFER_SIZE];
for (int i = 0; i < files.length; i++) {
if (!filter.accept(null, files[i]))
continue;
IndexOutput os = null;
IndexInput is = null;
try {
// create file in dest directory
os = dest.createOutput(files[i]);
// read current file
is = src.openInput(files[i]);
// and copy to dest directory
long len = is.length();
long readCount = 0;
while (readCount < len) {
int toRead = readCount + BufferedIndexOutput.BUFFER_SIZE > len ? (int)(len - readCount) : BufferedIndexOutput.BUFFER_SIZE;
is.readBytes(buf, 0, toRead);
os.writeBytes(buf, toRead);
readCount += toRead;
}
} finally {
// graceful cleanup
try {
if (os != null)
os.close();
} finally {
if (is != null)
is.close();
}
}
}
if(closeDirSrc)
src.close();
}
}
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