package org.h2.store.fs;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.channels.FileLock;
import java.nio.channels.ReadableByteChannel;
import java.nio.channels.WritableByteChannel;
public abstract class FileBase extends FileChannel {
@Override
public abstract long size() throws IOException;
@Override
public abstract long position() throws IOException;
@Override
public abstract FileChannel position(long newPosition) throws IOException;
@Override
public abstract int read(ByteBuffer dst) throws IOException;
@Override
public abstract int write(ByteBuffer src) throws IOException;
@Override
public synchronized int read(ByteBuffer dst, long position)
throws IOException {
long oldPos = position();
position(position);
int len = read(dst);
position(oldPos);
return len;
}
@Override
public synchronized int write(ByteBuffer src, long position)
throws IOException {
long oldPos = position();
position(position);
int len = write(src);
position(oldPos);
return len;
}
@Override
public abstract FileChannel truncate(long size) throws IOException;
@Override
public void force(boolean metaData) throws IOException {
}
@Override
protected void implCloseChannel() throws IOException {
}
@Override
public FileLock lock(long position, long size, boolean shared)
throws IOException {
throw new UnsupportedOperationException();
}
@Override
public MappedByteBuffer map(MapMode mode, long position, long size)
throws IOException {
throw new UnsupportedOperationException();
}
@Override
public long read(ByteBuffer[] dsts, int offset, int length)
throws IOException {
throw new UnsupportedOperationException();
}
@Override
public long transferFrom(ReadableByteChannel src, long position, long count)
throws IOException {
throw new UnsupportedOperationException();
}
@Override
public long transferTo(long position, long count, WritableByteChannel target)
throws IOException {
throw new UnsupportedOperationException();
}
@Override
public FileLock tryLock(long position, long size, boolean shared)
throws IOException {
throw new UnsupportedOperationException();
}
@Override
public long write(ByteBuffer[] srcs, int offset, int length)
throws IOException {
throw new UnsupportedOperationException();
}
}