briar/test/net/sf/briar/transport/NullOutgoingEncryptionLayer.java

package net.sf.briar.transport;

import static net.sf.briar.api.transport.TransportConstants.MAX_SEGMENT_LENGTH;
import static net.sf.briar.api.transport.TransportConstants.TAG_LENGTH;

import java.io.IOException;
import java.io.OutputStream;

import net.sf.briar.api.transport.Segment;

/** An encryption layer that performs no encryption. */
class NullOutgoingEncryptionLayer implements OutgoingEncryptionLayer {

	private final OutputStream out;

	private long capacity;

	NullOutgoingEncryptionLayer(OutputStream out) {
		this.out = out;
		capacity = Long.MAX_VALUE;
	}

	NullOutgoingEncryptionLayer(OutputStream out, long capacity) {
		this.out = out;
		this.capacity = capacity;
	}

	public void writeSegment(Segment s) throws IOException {
		out.write(s.getBuffer(), 0, s.getLength());
		capacity -= s.getLength();
	}

	public void flush() throws IOException {
		out.flush();
	}

	public long getRemainingCapacity() {
		return capacity;
	}

	public int getMaxSegmentLength() {
		return MAX_SEGMENT_LENGTH - TAG_LENGTH;
	}
}