ByteBufferBackedInputStream.java

package mil.nga.giat.geowave.format.stanag4676;

import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;

public class ByteBufferBackedInputStream extends
		InputStream
{

	private final ByteBuffer buf;

	public ByteBufferBackedInputStream(
			final ByteBuffer buf ) {
		this.buf = buf;
	}

	@Override
	public int read()
			throws IOException {
		if (!buf.hasRemaining()) {
			return -1;
		}
		return buf.get() & 0xFF;
	}

	@Override
	public int read(
			final byte[] bytes,
			final int off,
			int len )
			throws IOException {
		if (!buf.hasRemaining()) {
			return -1;
		}

		len = Math.min(
				len,
				buf.remaining());
		buf.get(
				bytes,
				off,
				len);
		return len;
	}
}