Fixed circular dependency on switch connector

src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/controller/ButtonDimmerController.java

@@ -26,7 +26,7 @@ public class ButtonDimmerController
             ButtonDimmerRepository inputRepository,
             DimmableRepository<Dimmable> outputRepository,
             DeviceService deviceService) {
-        super(inputRepository, outputRepository, DimmableLight.BUTTON_DIMMER_DIMMABLE_CONNECTOR);
+        super(inputRepository, outputRepository);
         this.deviceService = deviceService;
         this.buttonDimmerRepository = inputRepository;
     }

src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/controller/InputDeviceConnectionController.java

@@ -23,7 +23,7 @@ import org.springframework.web.bind.annotation.RequestBody;
  * @param <O> the output device attached to I
  */
 public abstract class InputDeviceConnectionController<
-        I extends InputDevice, O extends OutputDevice> {
+        I extends InputDevice & Connectable<O>, O extends OutputDevice> {
 
     private class Connection {
         private final I input;
@@ -53,26 +53,20 @@ public abstract class InputDeviceConnectionController<
 
     @Autowired private DeviceService deviceService;
 
-    private DeviceRepository<I> inputRepository;
+    private final DeviceRepository<I> inputRepository;
 
-    private DeviceRepository<O> outputReposiory;
+    private final DeviceRepository<O> outputReposiory;
-
-    private Connector<I, O> connector;
 
     /**
      * Contstructs the controller by requiring essential object for the controller implementation
      *
      * @param inputRepository the input device repository
      * @param outputRepository the output device repository
-     * @param connector a appropriate Connector instance for the I and O tyoes.
      */
     protected InputDeviceConnectionController(
-            DeviceRepository<I> inputRepository,
+            DeviceRepository<I> inputRepository, DeviceRepository<O> outputRepository) {
-            DeviceRepository<O> outputRepository,
-            Connector<I, O> connector) {
         this.inputRepository = inputRepository;
         this.outputReposiory = outputRepository;
-        this.connector = connector;
     }
 
     private Connection checkConnectionIDs(Long inputId, List<Long> outputs, String username)
@@ -104,7 +98,7 @@ public abstract class InputDeviceConnectionController<
         final Connection pair = checkConnectionIDs(inputId, outputs, username);
 
         for (final O o : pair.getOutputs()) {
-            connector.connect(pair.getInput(), o, true);
+            pair.getInput().connect(o, true);
         }
 
         deviceService.saveAllAsOwner(pair.getOutputs(), username);
@@ -124,7 +118,7 @@ public abstract class InputDeviceConnectionController<
         final Connection pair = checkConnectionIDs(inputId, outputs, username);
 
         for (final O o : pair.getOutputs()) {
-            connector.connect(pair.getInput(), o, false);
+            pair.getInput().connect(o, false);
         }
 
         deviceService.saveAllAsOwner(pair.getOutputs(), username);

src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/controller/KnobDimmerController.java

@@ -25,7 +25,7 @@ public class KnobDimmerController extends InputDeviceConnectionController<KnobDi
             KnobDimmerRepository inputRepository,
             DimmableRepository<Dimmable> outputRepository,
             DeviceService deviceService) {
-        super(inputRepository, outputRepository, Dimmable.KNOB_DIMMER_DIMMABLE_CONNECTOR);
+        super(inputRepository, outputRepository);
         this.knobDimmerRepository = inputRepository;
         this.deviceService = deviceService;
     }

src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/controller/SwitchController.java

@@ -17,8 +17,8 @@ import org.springframework.web.bind.annotation.*;
 @RequestMapping("/switch")
 public class SwitchController extends InputDeviceConnectionController<Switch, Switchable> {
 
-    private SwitchRepository switchRepository;
+    private final SwitchRepository switchRepository;
-    private DeviceService deviceService;
+    private final DeviceService deviceService;
 
     /**
      * Contstructs the controller by requiring essential object for the controller implementation
@@ -31,7 +31,7 @@ public class SwitchController extends InputDeviceConnectionController<Switch, Sw
             SwitchRepository inputRepository,
             SwitchableRepository<Switchable> outputRepository,
             DeviceService deviceService) {
-        super(inputRepository, outputRepository, Switchable.SWITCH_SWITCHABLE_CONNECTOR);
+        super(inputRepository, outputRepository);
         this.deviceService = deviceService;
         this.switchRepository = inputRepository;
     }

src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Connectable.java

@@ -0,0 +1,5 @@
+package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
+
+public interface Connectable<O extends OutputDevice> {
+    void connect(O output, boolean connect);
+}

src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Connector.java

@@ -1,46 +0,0 @@
-package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
-
-import java.util.Set;
-import java.util.function.Function;
-
-/**
- * A rule on how to connect an input device type to an output device type
- *
- * @param <I> the input device type
- * @param <O> the output device type
- */
-@FunctionalInterface
-public interface Connector<I extends InputDevice, O extends OutputDevice> {
-
-    /**
-     * Connects or disconnects input to output
-     *
-     * @param input the input device
-     * @param output the output device
-     * @param connect true if connection, false if disconnection
-     */
-    void connect(I input, O output, boolean connect);
-
-    /**
-     * Produces a basic implementation of a connector, assuming there is a ManyToMany relationship
-     * between J and K
-     *
-     * @param outputsGetter the getter method of the set of outputs on the input class
-     * @param inputsGetter the getter method of the set of outputs on the input class
-     * @param <J> the input device type
-     * @param <K> the output device type
-     * @return a Connector implementation for the pair of types J and K
-     */
-    static <J extends InputDevice, K extends OutputDevice> Connector<J, K> basic(
-            Function<J, Set<? super K>> outputsGetter, Function<K, Set<? super J>> inputsGetter) {
-        return (i, o, connect) -> {
-            if (connect) {
-                outputsGetter.apply(i).add(o);
-                inputsGetter.apply(o).add(i);
-            } else {
-                outputsGetter.apply(i).remove(o);
-                inputsGetter.apply(o).remove(i);
-            }
-        };
-    }
-}

src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Dimmable.java

@@ -12,12 +12,6 @@ import javax.validation.constraints.NotNull;
 @Inheritance(strategy = InheritanceType.SINGLE_TABLE)
 public class Dimmable extends Switchable implements RangeTriggerable {
 
-    public static final Connector<KnobDimmer, Dimmable> KNOB_DIMMER_DIMMABLE_CONNECTOR =
-            Connector.basic(KnobDimmer::getOutputs, Dimmable::getDimmers);
-
-    public static final Connector<ButtonDimmer, Dimmable> BUTTON_DIMMER_DIMMABLE_CONNECTOR =
-            Connector.basic(ButtonDimmer::getOutputs, Dimmable::getDimmers);
-
     protected Dimmable(String kind) {
         super(kind);
     }

src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Dimmer.java

@@ -9,7 +9,7 @@ import javax.persistence.*;
 /** Represents a generic dimmer input device */
 @Entity
 @Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
-public abstract class Dimmer extends InputDevice {
+public abstract class Dimmer extends InputDevice implements Connectable<Dimmable> {
     public Dimmer(String kind) {
         super(kind);
     }
@@ -37,4 +37,14 @@ public abstract class Dimmer extends InputDevice {
     public void addDimmable(Dimmable dimmable) {
         dimmables.add(dimmable);
     }
+
+    public void connect(Dimmable output, boolean connect) {
+        if (connect) {
+            output.getDimmers().add(this);
+            getOutputs().add(output);
+        } else {
+            output.getDimmers().remove(this);
+            getOutputs().remove(output);
+        }
+    }
 }

src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Switch.java

@@ -8,7 +8,7 @@ import javax.persistence.*;
 
 /** A switch input device */
 @Entity
-public class Switch extends InputDevice implements BooleanTriggerable {
+public class Switch extends InputDevice implements BooleanTriggerable, Connectable<Switchable> {
 
     @ManyToMany(
             cascade = {
@@ -64,6 +64,16 @@ public class Switch extends InputDevice implements BooleanTriggerable {
         return switchables;
     }
 
+    public void connect(Switchable output, boolean connect) {
+        if (connect) {
+            output.getSwitches().add(this);
+            getOutputs().add(output);
+        } else {
+            output.getSwitches().remove(this);
+            getOutputs().remove(output);
+        }
+    }
+
     @Override
     public boolean readTriggerState() {
         return on;

src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Switchable.java

@@ -11,9 +11,6 @@ import javax.persistence.*;
 @Inheritance(strategy = InheritanceType.JOINED)
 public abstract class Switchable extends OutputDevice {
 
-    public static final Connector<Switch, Switchable> SWITCH_SWITCHABLE_CONNECTOR =
-            Connector.basic(Switch::getOutputs, Switchable::getSwitches);
-
     @ManyToMany(
             mappedBy = "switchables",
             cascade = {