ControlLabImpl.java
/*
* Copyright © 2016 Greg Chabala
*
* This file is part of brick-control-lab.
*
* brick-control-lab is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* brick-control-lab is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with brick-control-lab. If not, see http://www.gnu.org/licenses/.
*/
package org.chabala.brick.controllab;
import org.slf4j.Logger;
import java.io.IOException;
import java.util.*;
import java.util.function.BiFunction;
import java.util.function.Function;
import java.util.stream.Collectors;
import static java.nio.charset.StandardCharsets.ISO_8859_1;
/**
* Object to represent interacting with the LEGO® control lab interface.
*/
class ControlLabImpl implements ControlLab {
private final Logger log;
private final SerialPortFactory portFactory;
private SerialPort serialPort;
private final InputManager inputManager;
private final BiFunction<SerialPort, InputManager, SerialPortEventListener> listenerFactory;
private final Map<OutputId, Output> outputMap;
private final StopButton stopButton;
private final Map<InputId, Input> inputMap;
private SerialPortWriter serialPortWriter;
/**
* Default constructor using jSSC serial implementation.
*/
ControlLabImpl(Logger log) {
this(log, new JsscSerialPortFactory(), new InputManager(), SerialListener::new);
}
ControlLabImpl(Logger log,
SerialPortFactory portFactory,
InputManager inputManager,
BiFunction<SerialPort, InputManager, SerialPortEventListener> listenerFactory) {
this.log = log;
this.portFactory = portFactory;
this.inputManager = inputManager;
this.listenerFactory = listenerFactory;
outputMap = Collections.unmodifiableMap(new EnumMap<>(
Arrays.stream(OutputId.values()).collect(
Collectors.toMap(Function.identity(), id -> new Output(this, id)))));
stopButton = new StopButton(inputManager);
inputMap = Collections.unmodifiableMap(new EnumMap<>(
Arrays.stream(InputId.values()).collect(
Collectors.toMap(Function.identity(), id -> new Input(inputManager, id)))));
}
@Override
public void open(String portName) throws IOException {
serialPort = portFactory.getSerialPort(portName);
log.info("Opening port {}", serialPort.getPortName());
serialPort.openPort();
SerialPortEventListener serialListener = listenerFactory.apply(serialPort, inputManager);
serialPort.addEventListener(serialListener);
serialPortWriter = new SerialPortWriter(serialPort);
serialPortWriter.sendCommand(Protocol.HANDSHAKE_CHALLENGE.getBytes(ISO_8859_1), log);
if (!serialListener.isHandshakeSeen()) {
close();
throw new IOException("No response to handshake");
}
serialPortWriter.startKeepAlives();
}
/** {@inheritDoc} */
@Override
public void turnOutputOff(Set<OutputId> outputs) throws IOException {
serialPortWriter.sendCommand(Protocol.OUTPUT_OFF, OutputId.encodeSetToByte(outputs));
}
/** {@inheritDoc} */
@Override
public void turnOutputOn(Set<OutputId> outputs) throws IOException {
serialPortWriter.sendCommand(Protocol.OUTPUT_ON, OutputId.encodeSetToByte(outputs));
}
/** {@inheritDoc} */
@Override
public void setOutputDirection(Direction direction, Set<OutputId> outputs) throws IOException {
serialPortWriter.sendCommand(direction.getCode(), OutputId.encodeSetToByte(outputs));
}
/** {@inheritDoc} */
@Override
public void setOutputPowerLevel(PowerLevel powerLevel, Set<OutputId> outputs) throws IOException {
serialPortWriter.sendCommand(powerLevel.getCode(), OutputId.encodeSetToByte(outputs));
}
/** {@inheritDoc} */
@Override
public Output getOutput(OutputId outputId) {
return outputMap.get(outputId);
}
/** {@inheritDoc} */
@Override
public Output getOutput(Set<OutputId> outputs) {
if (outputs.size() == 1) {
return getOutput(outputs.iterator().next());
}
return new Output(this, outputs);
}
/** {@inheritDoc} */
@Override
public StopButton getStopButton() {
return stopButton;
}
/** {@inheritDoc} */
@Override
public Input getInput(InputId inputId) {
return inputMap.get(inputId);
}
/** {@inheritDoc} */
@Override
public List<String> getAvailablePorts() {
return portFactory.getAvailablePorts();
}
/** {@inheritDoc} */
@Override
public String getConnectedPortName() {
if (serialPort != null) {
return serialPort.getPortName();
} else {
return "";
}
}
/** {@inheritDoc} */
@Override
public void close() throws IOException {
if (serialPortWriter != null) {
if (serialPort != null) {
serialPortWriter.sendCommand(Protocol.DISCONNECT);
}
serialPortWriter.close();
serialPortWriter = null;
}
if (serialPort != null) {
serialPort.close();
serialPort = null;
}
}
@Override
public String toString() {
return "ControlLabImpl{" +
"serialPort=" + serialPort +
"}@" +
System.identityHashCode(this);
}
}