src.org.tukaani.xz.SeekableFileInputStream Maven / Gradle / Ivy
/*
* SeekableFileInputStream
*
* Author: Lasse Collin
*
* This file has been put into the public domain.
* You can do whatever you want with this file.
*/
package org.tukaani.xz;
import java.io.File;
import java.io.RandomAccessFile;
import java.io.IOException;
import java.io.FileNotFoundException;
/**
* Wraps a {@link java.io.RandomAccessFile RandomAccessFile}
* in a SeekableInputStream.
*/
public class SeekableFileInputStream extends SeekableInputStream {
/**
* The RandomAccessFile that has been wrapped
* into a SeekableFileInputStream.
*/
protected RandomAccessFile randomAccessFile;
/**
* Creates a new seekable input stream that reads from the specified file.
*/
public SeekableFileInputStream(File file) throws FileNotFoundException {
randomAccessFile = new RandomAccessFile(file, "r");
}
/**
* Creates a new seekable input stream that reads from a file with
* the specified name.
*/
public SeekableFileInputStream(String name) throws FileNotFoundException {
randomAccessFile = new RandomAccessFile(name, "r");
}
/**
* Creates a new seekable input stream from an existing
* RandomAccessFile object.
*/
public SeekableFileInputStream(RandomAccessFile randomAccessFile) {
this.randomAccessFile = randomAccessFile;
}
/**
* Calls {@link RandomAccessFile#read() randomAccessFile.read()}.
*/
public int read() throws IOException {
return randomAccessFile.read();
}
/**
* Calls {@link RandomAccessFile#read(byte[]) randomAccessFile.read(buf)}.
*/
public int read(byte[] buf) throws IOException {
return randomAccessFile.read(buf);
}
/**
* Calls
* {@link RandomAccessFile#read(byte[],int,int)
* randomAccessFile.read(buf, off, len)}.
*/
public int read(byte[] buf, int off, int len) throws IOException {
return randomAccessFile.read(buf, off, len);
}
/**
* Calls {@link RandomAccessFile#close() randomAccessFile.close()}.
*/
public void close() throws IOException {
randomAccessFile.close();
}
/**
* Calls {@link RandomAccessFile#length() randomAccessFile.length()}.
*/
public long length() throws IOException {
return randomAccessFile.length();
}
/**
* Calls {@link RandomAccessFile#getFilePointer()
randomAccessFile.getFilePointer()}.
*/
public long position() throws IOException {
return randomAccessFile.getFilePointer();
}
/**
* Calls {@link RandomAccessFile#seek(long) randomAccessFile.seek(long)}.
*/
public void seek(long pos) throws IOException {
randomAccessFile.seek(pos);
}
}