Updated transport plugin API.

api/net/sf/briar/api/transport/TransportCallback.java

+package net.sf.briar.api.transport;
+
+import java.util.Map;
+
+public interface TransportCallback {
+
+	void setLocalTransports(Map<String, String> transports);
+
+	void setConfig(Map<String, String> config);
+
+	void showMessage(String message);
+
+	boolean showConfirmationMessage(String message);
+
+	int showChoice(String message, String[] choices);
+}

api/net/sf/briar/api/transport/batch/BatchTransportCallback.java

 package net.sf.briar.api.transport.batch;
 
-import java.util.Map;
+import net.sf.briar.api.transport.TransportCallback;
 
 /**
  * An interface for receiving readers and writers created by a batch-mode
  * transport plugin.
  */
-public interface BatchTransportCallback {
+public interface BatchTransportCallback extends TransportCallback {
 
 	void readerCreated(BatchTransportReader r);
 
 	void writerCreated(BatchTransportWriter w);
-
-	void setLocalTransports(Map<String, String> transports);
-
-	void setConfig(Map<String, String> config);
 }

api/net/sf/briar/api/transport/batch/BatchTransportWriter.java

@@ -16,9 +16,14 @@ public interface BatchTransportWriter {
 	OutputStream getOutputStream();
 
 	/**
-	 * Closes the writer and disposes of any associated state. This method must
-	 * be called even if the writer is not used, or if an exception is thrown
-	 * while using the writer.
+	 * Finishes writing to the transport. This method should be called after
+	 * flushing and closing the output stream.
+	 */
+	void finish() throws IOException;
+
+	/**
+	 * Disposes of any associated state. This method must be called even if the
+	 * writer is not used, or if an exception is thrown while using the writer.
 	 */
 	void dispose() throws IOException;
 }

api/net/sf/briar/api/transport/stream/StreamTransportCallback.java

 package net.sf.briar.api.transport.stream;
 
-import java.util.Map;
+import net.sf.briar.api.transport.TransportCallback;
 
 /**
  * An interface for receiving connections created by a stream-mode transport
  * plugin.
  */
-public interface StreamTransportCallback {
+public interface StreamTransportCallback extends TransportCallback {
 
 	void connectionCreated(StreamTransportConnection c);
-
-	void setLocalTransports(Map<String, String> transports);
-
-	void setConfig(Map<String, String> config);
 }

test/net/sf/briar/transport/batch/TestBatchTransportWriter.java

@@ -23,6 +23,10 @@ class TestBatchTransportWriter implements BatchTransportWriter {
 		return out;
 	}
 
+	public void finish() throws IOException {
+		// Nothing to do
+	}
+
 	public void dispose() throws IOException {
 		// The output stream may have been left open
 		out.close();