org.xbib.net.mime.DataFile Maven / Gradle / Ivy
package org.xbib.net.mime;
import java.io.File;
import java.io.IOException;
final class DataFile {
private WeakDataFile weak;
private long writePointer;
DataFile(File file) throws IOException {
writePointer=0;
weak = new WeakDataFile(this, file);
}
void close() throws IOException {
weak.close();
}
/**
* Read data from the given file pointer position.
*
* @param pointer read position
* @param buf that needs to be filled
* @param offset the start offset of the data.
* @param length of data that needs to be read
*/
synchronized void read(long pointer, byte[] buf, int offset, int length ) throws IOException {
weak.read(pointer, buf, offset, length);
}
void renameTo(File f) throws IOException {
weak.renameTo(f);
}
/**
* Write data to the file
*
* @param data that needs to written to a file
* @param offset start offset in the data
* @param length no bytes to write
* @return file pointer before the write operation(or at which the
* data is written)
*/
synchronized long writeTo(byte[] data, int offset, int length) throws IOException {
long temp = writePointer;
writePointer = weak.writeTo(writePointer, data, offset, length);
return temp;
}
}