Decouple removable drive plugin from java.io.File for portability.

bramble-core/src/main/java/org/briarproject/bramble/plugin/file/AbstractRemovableDrivePlugin.java

@@ -0,0 +1,114 @@
+package org.briarproject.bramble.plugin.file;
+
+import org.briarproject.bramble.api.Pair;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.plugin.ConnectionHandler;
+import org.briarproject.bramble.api.plugin.TransportConnectionReader;
+import org.briarproject.bramble.api.plugin.TransportConnectionWriter;
+import org.briarproject.bramble.api.plugin.TransportId;
+import org.briarproject.bramble.api.plugin.simplex.SimplexPlugin;
+import org.briarproject.bramble.api.properties.TransportProperties;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.Collection;
+import java.util.logging.Logger;
+
+import javax.annotation.concurrent.Immutable;
+
+import static java.util.logging.Level.WARNING;
+import static java.util.logging.Logger.getLogger;
+import static org.briarproject.bramble.api.plugin.Plugin.State.ACTIVE;
+import static org.briarproject.bramble.api.plugin.RemovableDriveConstants.ID;
+import static org.briarproject.bramble.util.LogUtils.logException;
+
+@Immutable
+@NotNullByDefault
+abstract class AbstractRemovableDrivePlugin implements SimplexPlugin {
+
+	private static final Logger LOG =
+			getLogger(AbstractRemovableDrivePlugin.class.getName());
+
+	private final int maxLatency;
+
+	abstract InputStream openInputStream(TransportProperties p)
+			throws IOException;
+
+	abstract OutputStream openOutputStream(TransportProperties p)
+			throws IOException;
+
+	AbstractRemovableDrivePlugin(int maxLatency) {
+		this.maxLatency = maxLatency;
+	}
+
+	@Override
+	public TransportId getId() {
+		return ID;
+	}
+
+	@Override
+	public int getMaxLatency() {
+		return maxLatency;
+	}
+
+	@Override
+	public int getMaxIdleTime() {
+		// Unused for simplex transports
+		throw new UnsupportedOperationException();
+	}
+
+	@Override
+	public void start() {
+	}
+
+	@Override
+	public void stop() {
+	}
+
+	@Override
+	public State getState() {
+		return ACTIVE;
+	}
+
+	@Override
+	public int getReasonsDisabled() {
+		return 0;
+	}
+
+	@Override
+	public boolean shouldPoll() {
+		return false;
+	}
+
+	@Override
+	public int getPollingInterval() {
+		throw new UnsupportedOperationException();
+	}
+
+	@Override
+	public void poll(
+			Collection<Pair<TransportProperties, ConnectionHandler>> properties) {
+		throw new UnsupportedOperationException();
+	}
+
+	@Override
+	public TransportConnectionReader createReader(TransportProperties p) {
+		try {
+			return new TransportInputStreamReader(openInputStream(p));
+		} catch (IOException e) {
+			logException(LOG, WARNING, e);
+			return null;
+		}
+	}
+
+	@Override
+	public TransportConnectionWriter createWriter(TransportProperties p) {
+		try {
+			return new TransportOutputStreamWriter(this, openOutputStream(p));
+		} catch (IOException e) {
+			logException(LOG, WARNING, e);
+			return null;
+		}
+	}
+}

bramble-core/src/main/java/org/briarproject/bramble/plugin/file/RemovableDrivePlugin.java

@@ -1,96 +1,38 @@
 package org.briarproject.bramble.plugin.file;
 
-import org.briarproject.bramble.api.Pair;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.plugin.ConnectionHandler;
-import org.briarproject.bramble.api.plugin.PluginCallback;
-import org.briarproject.bramble.api.plugin.TransportId;
 import org.briarproject.bramble.api.properties.TransportProperties;
 
-import java.io.File;
+import java.io.FileInputStream;
-import java.util.Collection;
+import java.io.FileOutputStream;
-import java.util.logging.Logger;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
 
 import javax.annotation.concurrent.Immutable;
 
-import static java.util.logging.Level.INFO;
+import static org.briarproject.bramble.api.plugin.FileConstants.PROP_PATH;
-import static java.util.logging.Logger.getLogger;
+import static org.briarproject.bramble.util.StringUtils.isNullOrEmpty;
-import static org.briarproject.bramble.api.plugin.Plugin.State.ACTIVE;
-import static org.briarproject.bramble.api.plugin.RemovableDriveConstants.ID;
 
 @Immutable
 @NotNullByDefault
-class RemovableDrivePlugin extends FilePlugin {
+class RemovableDrivePlugin extends AbstractRemovableDrivePlugin {
 
-	private static final Logger LOG =
+	RemovableDrivePlugin(int maxLatency) {
-			getLogger(RemovableDrivePlugin.class.getName());
+		super(maxLatency);
-
-	RemovableDrivePlugin(PluginCallback callback, int maxLatency) {
-		super(callback, maxLatency);
 	}
 
 	@Override
-	protected void writerFinished(File f, boolean exception) {
+	InputStream openInputStream(TransportProperties p) throws IOException {
-		if (LOG.isLoggable(INFO)) {
+		String path = p.get(PROP_PATH);
-			LOG.info("Writer finished, exception: " + exception);
+		if (isNullOrEmpty(path)) throw new IllegalArgumentException();
-		}
+		return new FileInputStream(path);
 	}
 
 	@Override
-	protected void readerFinished(File f, boolean exception,
+	OutputStream openOutputStream(TransportProperties p) throws IOException {
-			boolean recognised) {
+		String path = p.get(PROP_PATH);
-		if (LOG.isLoggable(INFO)) {
+		if (isNullOrEmpty(path)) throw new IllegalArgumentException();
-			LOG.info("Reader finished, exception: " + exception
+		return new FileOutputStream(path);
-					+ ", recognised: " + recognised);
-		}
-		// Try to delete the file if the read finished successfully
-		if (recognised && !exception && !f.delete()) {
-			LOG.info("Failed to delete recognised file");
-		}
-	}
-
-	@Override
-	public TransportId getId() {
-		return ID;
-	}
-
-	@Override
-	public void start() {
-	}
-
-	@Override
-	public void stop() {
-	}
-
-	@Override
-	public State getState() {
-		return ACTIVE;
-	}
-
-	@Override
-	public int getReasonsDisabled() {
-		return 0;
-	}
-
-	@Override
-	public int getMaxIdleTime() {
-		// Unused for simplex transports
-		throw new UnsupportedOperationException();
-	}
-
-	@Override
-	public boolean shouldPoll() {
-		return false;
-	}
-
-	@Override
-	public int getPollingInterval() {
-		throw new UnsupportedOperationException();
-	}
-
-	@Override
-	public void poll(
-			Collection<Pair<TransportProperties, ConnectionHandler>> properties) {
-		throw new UnsupportedOperationException();
 	}
 }

bramble-core/src/main/java/org/briarproject/bramble/plugin/file/RemovableDrivePluginFactory.java

@@ -36,6 +36,6 @@ public class RemovableDrivePluginFactory implements SimplexPluginFactory {
 	@Nullable
 	@Override
 	public SimplexPlugin createPlugin(PluginCallback callback) {
-		return new RemovableDrivePlugin(callback, MAX_LATENCY);
+		return new RemovableDrivePlugin(MAX_LATENCY);
 	}
 }

bramble-core/src/main/java/org/briarproject/bramble/plugin/file/TransportInputStreamReader.java

@@ -0,0 +1,34 @@
+package org.briarproject.bramble.plugin.file;
+
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.plugin.TransportConnectionReader;
+
+import java.io.InputStream;
+import java.util.logging.Logger;
+
+import static java.util.logging.Level.WARNING;
+import static java.util.logging.Logger.getLogger;
+import static org.briarproject.bramble.util.IoUtils.tryToClose;
+
+@NotNullByDefault
+class TransportInputStreamReader implements TransportConnectionReader {
+
+	private static final Logger LOG =
+			getLogger(TransportInputStreamReader.class.getName());
+
+	private final InputStream in;
+
+	TransportInputStreamReader(InputStream in) {
+		this.in = in;
+	}
+
+	@Override
+	public InputStream getInputStream() {
+		return in;
+	}
+
+	@Override
+	public void dispose(boolean exception, boolean recognised) {
+		tryToClose(in, LOG, WARNING);
+	}
+}

bramble-core/src/main/java/org/briarproject/bramble/plugin/file/TransportOutputStreamWriter.java

@@ -0,0 +1,47 @@
+package org.briarproject.bramble.plugin.file;
+
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.plugin.Plugin;
+import org.briarproject.bramble.api.plugin.TransportConnectionWriter;
+
+import java.io.OutputStream;
+import java.util.logging.Logger;
+
+import static java.util.logging.Level.WARNING;
+import static java.util.logging.Logger.getLogger;
+import static org.briarproject.bramble.util.IoUtils.tryToClose;
+
+@NotNullByDefault
+class TransportOutputStreamWriter implements TransportConnectionWriter {
+
+	private static final Logger LOG =
+			getLogger(TransportOutputStreamWriter.class.getName());
+
+	private final Plugin plugin;
+	private final OutputStream out;
+
+	TransportOutputStreamWriter(Plugin plugin, OutputStream out) {
+		this.plugin = plugin;
+		this.out = out;
+	}
+
+	@Override
+	public int getMaxLatency() {
+		return plugin.getMaxLatency();
+	}
+
+	@Override
+	public int getMaxIdleTime() {
+		return plugin.getMaxIdleTime();
+	}
+
+	@Override
+	public OutputStream getOutputStream() {
+		return out;
+	}
+
+	@Override
+	public void dispose(boolean exception) {
+		tryToClose(out, LOG, WARNING);
+	}
+}