Merge branch '58-allow-many-input-devices-to-connect-to-many-output-devices' into 'dev'

Resolve "Allow many input devices to connect to many output devices"

Closes #58

See merge request sa4-2020/the-sanmarinoes/backend!78

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

@@ -18,19 +18,19 @@ import org.springframework.web.bind.annotation.*;
 @EnableAutoConfiguration
 @RequestMapping("/buttonDimmer")
 public class ButtonDimmerController
-        extends InputDeviceConnectionController<ButtonDimmer, DimmableLight> {
+        extends InputDeviceConnectionController<ButtonDimmer, Dimmable> {
     private ButtonDimmerRepository buttonDimmerRepository;
-    private DimmableLightRepository dimmableLightRepository;
+    private DimmableRepository<Dimmable> dimmableRepository;
 
     @Autowired
     protected ButtonDimmerController(
-            ButtonDimmerRepository inputRepository, DimmableLightRepository outputRepository) {
+            ButtonDimmerRepository inputRepository, DimmableRepository<Dimmable> outputRepository) {
         super(
                 inputRepository,
                 outputRepository,
-                DimmableLight.BUTTON_DIMMER_DIMMABLE_LIGHT_CONNECTOR);
+                DimmableLight.BUTTON_DIMMER_DIMMABLE_CONNECTOR);
         this.buttonDimmerRepository = inputRepository;
-        this.dimmableLightRepository = outputRepository;
+        this.dimmableRepository = outputRepository;
     }
 
     @GetMapping
@@ -53,7 +53,7 @@ public class ButtonDimmerController
     }
 
     @PutMapping("/dim")
-    public Set<DimmableLight> dim(
+    public Set<Dimmable> dim(
             @Valid @RequestBody final ButtonDimmerDimRequest bd, final Principal principal)
             throws NotFoundException {
         final ButtonDimmer buttonDimmer =
@@ -70,25 +70,11 @@ public class ButtonDimmerController
                 break;
         }
 
-        dimmableLightRepository.saveAll(buttonDimmer.getOutputs());
+        dimmableRepository.saveAll(buttonDimmer.getOutputs());
 
         return buttonDimmer.getOutputs();
     }
 
-    @PostMapping("/{id}/lights")
-    public Set<? extends OutputDevice> addLight(
-            @PathVariable("id") long inputId, @RequestBody List<Long> lightId)
-            throws NotFoundException {
-        return addOutput(inputId, lightId);
-    }
-
-    @DeleteMapping("/{id}/lights")
-    public Set<? extends OutputDevice> removeLight(
-            @PathVariable("id") long inputId, @RequestBody List<Long> lightId)
-            throws NotFoundException {
-        return removeOutput(inputId, lightId);
-    }
-
     @DeleteMapping("/{id}")
     public void delete(@PathVariable("id") long id) {
         buttonDimmerRepository.deleteById(id);

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

@@ -2,7 +2,7 @@ package ch.usi.inf.sa4.sanmarinoes.smarthut.controller;
 
 import static ch.usi.inf.sa4.sanmarinoes.smarthut.utils.Utils.toList;
 
-import ch.usi.inf.sa4.sanmarinoes.smarthut.dto.CurtainsSaveRequest;
+import ch.usi.inf.sa4.sanmarinoes.smarthut.dto.DimmableSaveRequest;
 import ch.usi.inf.sa4.sanmarinoes.smarthut.error.NotFoundException;
 import ch.usi.inf.sa4.sanmarinoes.smarthut.models.Curtains;
 import ch.usi.inf.sa4.sanmarinoes.smarthut.models.CurtainsRepository;
@@ -28,21 +28,21 @@ public class CurtainsController {
         return curtainsService.findById(id).orElseThrow(NotFoundException::new);
     }
 
-    private Curtains save(Curtains newRL, CurtainsSaveRequest s) {
+    private Curtains save(Curtains newRL, DimmableSaveRequest s) {
         newRL.setName(s.getName());
         newRL.setRoomId(s.getRoomId());
-        newRL.setOpenedAmount(s.getOpening());
+        newRL.setIntensity(s.getIntensity());
 
         return curtainsService.save(newRL);
     }
 
     @PostMapping
-    public Curtains create(@Valid @RequestBody CurtainsSaveRequest curtain) {
+    public Curtains create(@Valid @RequestBody DimmableSaveRequest curtain) {
         return save(new Curtains(), curtain);
     }
 
     @PutMapping
-    public Curtains update(@Valid @RequestBody CurtainsSaveRequest curtain)
+    public Curtains update(@Valid @RequestBody DimmableSaveRequest curtain)
             throws NotFoundException {
         return save(
                 curtainsService.findById(curtain.getId()).orElseThrow(NotFoundException::new),

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

@@ -2,7 +2,7 @@ package ch.usi.inf.sa4.sanmarinoes.smarthut.controller;
 
 import static ch.usi.inf.sa4.sanmarinoes.smarthut.utils.Utils.toList;
 
-import ch.usi.inf.sa4.sanmarinoes.smarthut.dto.DimmableLightSaveRequest;
+import ch.usi.inf.sa4.sanmarinoes.smarthut.dto.DimmableSaveRequest;
 import ch.usi.inf.sa4.sanmarinoes.smarthut.error.NotFoundException;
 import ch.usi.inf.sa4.sanmarinoes.smarthut.models.DimmableLight;
 import ch.usi.inf.sa4.sanmarinoes.smarthut.models.DimmableLightRepository;
@@ -30,7 +30,7 @@ public class DimmableLightController {
         return dimmableLightService.findById(id).orElseThrow(NotFoundException::new);
     }
 
-    private DimmableLight save(DimmableLight initial, DimmableLightSaveRequest dl) {
+    private DimmableLight save(DimmableLight initial, DimmableSaveRequest dl) {
         initial.setIntensity(dl.getIntensity());
         initial.setName(dl.getName());
         initial.setRoomId(dl.getRoomId());
@@ -39,13 +39,13 @@ public class DimmableLightController {
     }
 
     @PostMapping
-    public DimmableLight create(@Valid @RequestBody DimmableLightSaveRequest dl) {
+    public DimmableLight create(@Valid @RequestBody DimmableSaveRequest dl) {
         return save(new DimmableLight(), dl);
     }
 
     @PutMapping
     public DimmableLight update(
-            @Valid @RequestBody DimmableLightSaveRequest sp, final Principal principal)
+            @Valid @RequestBody DimmableSaveRequest sp, final Principal principal)
             throws NotFoundException {
         return save(
                 dimmableLightService

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

@@ -2,10 +2,18 @@ package ch.usi.inf.sa4.sanmarinoes.smarthut.controller;
 
 import ch.usi.inf.sa4.sanmarinoes.smarthut.error.NotFoundException;
 import ch.usi.inf.sa4.sanmarinoes.smarthut.models.*;
+import com.google.gson.Gson;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Set;
 
+import static ch.usi.inf.sa4.sanmarinoes.smarthut.utils.Utils.toList;
+
 /**
  * An abstract controller for an input device that has output connected to it. Aids to create the
  * output add and output remove route
@@ -103,4 +111,18 @@ public abstract class InputDeviceConnectionController<
         outputReposiory.saveAll(pair.output);
         return pair.input.getOutputs();
     }
+
+    @PostMapping("/{id}/lights")
+    public List<OutputDevice> addLight(
+            @PathVariable("id") long inputId, @RequestBody List<Long> lightId)
+            throws NotFoundException {
+        return toList(addOutput(inputId, lightId));
+    }
+
+    @DeleteMapping("/{id}/lights")
+    public List<OutputDevice> removeLight(
+            @PathVariable("id") long inputId, @RequestBody List<Long> lightId)
+            throws NotFoundException {
+        return toList(removeOutput(inputId, lightId));
+    }
 }

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

@@ -18,20 +18,20 @@ import org.springframework.web.bind.annotation.*;
 @EnableAutoConfiguration
 @RequestMapping("/knobDimmer")
 public class KnobDimmerController
-        extends InputDeviceConnectionController<KnobDimmer, DimmableLight> {
+        extends InputDeviceConnectionController<KnobDimmer, Dimmable> {
 
     @Autowired private KnobDimmerRepository knobDimmerRepository;
-    @Autowired private DimmableLightRepository dimmableLightRepository;
+    @Autowired private DimmableRepository<Dimmable> dimmableRepository;
 
     @Autowired
     protected KnobDimmerController(
-            KnobDimmerRepository inputRepository, DimmableLightRepository outputRepository) {
+            KnobDimmerRepository inputRepository, DimmableRepository<Dimmable> outputRepository) {
         super(
                 inputRepository,
                 outputRepository,
-                DimmableLight.KNOB_DIMMER_DIMMABLE_LIGHT_CONNECTOR);
+                Dimmable.KNOB_DIMMER_DIMMABLE_CONNECTOR);
         this.knobDimmerRepository = inputRepository;
-        this.dimmableLightRepository = outputRepository;
+        this.dimmableRepository = outputRepository;
     }
 
     @GetMapping
@@ -54,7 +54,7 @@ public class KnobDimmerController
     }
 
     @PutMapping("/dimTo")
-    public Set<DimmableLight> dimTo(
+    public Set<Dimmable> dimTo(
             @Valid @RequestBody final KnobDimmerDimRequest bd, final Principal principal)
             throws NotFoundException {
         final KnobDimmer dimmer =
@@ -63,25 +63,11 @@ public class KnobDimmerController
                         .orElseThrow(NotFoundException::new);
 
         dimmer.setLightIntensity(bd.getIntensity());
-        dimmableLightRepository.saveAll(dimmer.getOutputs());
+        dimmableRepository.saveAll(dimmer.getOutputs());
 
         return dimmer.getOutputs();
     }
 
-    @PostMapping("/{id}/lights")
-    public Set<? extends OutputDevice> addLight(
-            @PathVariable("id") long inputId, @RequestBody List<Long> lightId)
-            throws NotFoundException {
-        return addOutput(inputId, lightId);
-    }
-
-    @DeleteMapping("/{id}/lights")
-    public Set<? extends OutputDevice> removeLight(
-            @PathVariable("id") long inputId, @RequestBody List<Long> lightId)
-            throws NotFoundException {
-        return removeOutput(inputId, lightId);
-    }
-
     @DeleteMapping("/{id}")
     public void delete(@PathVariable("id") long id) {
         knobDimmerRepository.deleteById(id);

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

@@ -2,7 +2,7 @@ package ch.usi.inf.sa4.sanmarinoes.smarthut.controller;
 
 import static ch.usi.inf.sa4.sanmarinoes.smarthut.utils.Utils.toList;
 
-import ch.usi.inf.sa4.sanmarinoes.smarthut.dto.RegularLightSaveRequest;
+import ch.usi.inf.sa4.sanmarinoes.smarthut.dto.SwitchableSaveRequest;
 import ch.usi.inf.sa4.sanmarinoes.smarthut.error.NotFoundException;
 import ch.usi.inf.sa4.sanmarinoes.smarthut.models.RegularLight;
 import ch.usi.inf.sa4.sanmarinoes.smarthut.models.RegularLightRepository;
@@ -37,7 +37,7 @@ public class RegularLightController {
         return regularLightService.findById(id).orElseThrow(NotFoundException::new);
     }
 
-    private RegularLight save(RegularLight newRL, RegularLightSaveRequest rl) {
+    private RegularLight save(RegularLight newRL, SwitchableSaveRequest rl) {
         newRL.setName(rl.getName());
         newRL.setRoomId(rl.getRoomId());
         newRL.setOn(rl.isOn());
@@ -46,13 +46,13 @@ public class RegularLightController {
     }
 
     @PostMapping
-    public RegularLight create(@Valid @RequestBody RegularLightSaveRequest rl) {
+    public RegularLight create(@Valid @RequestBody SwitchableSaveRequest rl) {
         return save(new RegularLight(), rl);
     }
 
     @PutMapping
     public RegularLight update(
-            @Valid @RequestBody RegularLightSaveRequest rl, final Principal principal)
+            @Valid @RequestBody SwitchableSaveRequest rl, final Principal principal)
             throws NotFoundException {
         return save(
                 regularLightService

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

@@ -2,7 +2,7 @@ package ch.usi.inf.sa4.sanmarinoes.smarthut.controller;
 
 import static ch.usi.inf.sa4.sanmarinoes.smarthut.utils.Utils.toList;
 
-import ch.usi.inf.sa4.sanmarinoes.smarthut.dto.SecurityCameraSaveRequest;
+import ch.usi.inf.sa4.sanmarinoes.smarthut.dto.SwitchableSaveRequest;
 import ch.usi.inf.sa4.sanmarinoes.smarthut.error.NotFoundException;
 import ch.usi.inf.sa4.sanmarinoes.smarthut.models.SecurityCamera;
 import ch.usi.inf.sa4.sanmarinoes.smarthut.models.SecurityCameraRepository;
@@ -37,7 +37,7 @@ public class SecurityCameraController {
         return securityCameraService.findById(id).orElseThrow(NotFoundException::new);
     }
 
-    private SecurityCamera save(SecurityCamera newSC, SecurityCameraSaveRequest sc) {
+    private SecurityCamera save(SecurityCamera newSC, SwitchableSaveRequest sc) {
         newSC.setName(sc.getName());
         newSC.setRoomId(sc.getRoomId());
         newSC.setOn(sc.isOn());
@@ -46,13 +46,13 @@ public class SecurityCameraController {
     }
 
     @PostMapping
-    public SecurityCamera create(@Valid @RequestBody SecurityCameraSaveRequest sc) {
+    public SecurityCamera create(@Valid @RequestBody SwitchableSaveRequest sc) {
         return save(new SecurityCamera(), sc);
     }
 
     @PutMapping
     public SecurityCamera update(
-            @Valid @RequestBody SecurityCameraSaveRequest sc, final Principal principal)
+            @Valid @RequestBody SwitchableSaveRequest sc, final Principal principal)
             throws NotFoundException {
         return save(
                 securityCameraService

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

@@ -2,11 +2,10 @@ package ch.usi.inf.sa4.sanmarinoes.smarthut.controller;
 
 import static ch.usi.inf.sa4.sanmarinoes.smarthut.utils.Utils.toList;
 
-import ch.usi.inf.sa4.sanmarinoes.smarthut.dto.SmartPlugSaveRequest;
+import ch.usi.inf.sa4.sanmarinoes.smarthut.dto.SwitchableSaveRequest;
 import ch.usi.inf.sa4.sanmarinoes.smarthut.error.NotFoundException;
 import ch.usi.inf.sa4.sanmarinoes.smarthut.models.*;
 import java.security.Principal;
-import java.util.*;
 import java.util.List;
 import javax.validation.Valid;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -30,7 +29,7 @@ public class SmartPlugController {
         return smartPlugRepository.findById(id).orElseThrow(NotFoundException::new);
     }
 
-    private SmartPlug save(SmartPlug newSP, SmartPlugSaveRequest sp) {
+    private SmartPlug save(SmartPlug newSP, SwitchableSaveRequest sp) {
         newSP.setOn(sp.isOn());
         newSP.setId(sp.getId());
         newSP.setName(sp.getName());
@@ -40,12 +39,12 @@ public class SmartPlugController {
     }
 
     @PostMapping
-    public SmartPlug create(@Valid @RequestBody SmartPlugSaveRequest sp) {
+    public SmartPlug create(@Valid @RequestBody SwitchableSaveRequest sp) {
         return save(new SmartPlug(), sp);
     }
 
     @PutMapping
-    public SmartPlug update(@Valid @RequestBody SmartPlugSaveRequest sp, final Principal principal)
+    public SmartPlug update(@Valid @RequestBody SwitchableSaveRequest sp, final Principal principal)
             throws NotFoundException {
         return save(
                 smartPlugRepository

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

@@ -9,6 +9,7 @@ import ch.usi.inf.sa4.sanmarinoes.smarthut.models.*;
 import java.security.Principal;
 import java.util.*;
 import java.util.List;
+import java.util.stream.Collectors;
 import javax.validation.Valid;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.*;
@@ -81,20 +82,6 @@ public class SwitchController extends InputDeviceConnectionController<Switch, Sw
         return s.getOutputs();
     }
 
-    @PostMapping("/{id}/lights")
-    public Set<? extends OutputDevice> addSwitchable(
-            @PathVariable("id") long inputId, @RequestBody List<Long> switchableId)
-            throws NotFoundException {
-        return addOutput(inputId, switchableId);
-    }
-
-    @DeleteMapping("/{id}/lights")
-    public Set<? extends OutputDevice> removeSwitchable(
-            @PathVariable("id") long inputId, @RequestBody List<Long> switchableId)
-            throws NotFoundException {
-        return removeOutput(inputId, switchableId);
-    }
-
     @DeleteMapping("/{id}")
     public void deleteById(@PathVariable("id") long id) {
         switchRepository.deleteById(id);

src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/dto/CurtainsSaveRequest.java

@@ -1,57 +0,0 @@
-package ch.usi.inf.sa4.sanmarinoes.smarthut.dto;
-
-import javax.validation.constraints.Max;
-import javax.validation.constraints.Min;
-import javax.validation.constraints.NotNull;
-
-public class CurtainsSaveRequest {
-    /** The state of this switch */
-    @NotNull
-    @Min(0)
-    @Max(100)
-    private int openedAmount;
-
-    /** Device identifier */
-    @NotNull private long id;
-
-    /**
-     * The room this device belongs in, as a foreign key id. To use when updating and inserting from
-     * a REST call.
-     */
-    @NotNull private Long roomId;
-
-    /** The name of the device as assigned by the user (e.g. 'Master bedroom light') */
-    @NotNull private String name;
-
-    public void setRoomId(Long roomId) {
-        this.roomId = roomId;
-    }
-
-    public void setName(String name) {
-        this.name = name;
-    }
-
-    public long getId() {
-        return id;
-    }
-
-    public Long getRoomId() {
-        return roomId;
-    }
-
-    public String getName() {
-        return name;
-    }
-
-    public int getOpening() {
-        return this.openedAmount;
-    }
-
-    public void setOpening(int newOpening) {
-        this.openedAmount = newOpening;
-    }
-
-    public void setId(long id) {
-        this.id = id;
-    }
-}

src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/dto/DimmableSaveRequest.java

@@ -4,10 +4,10 @@ import javax.validation.constraints.Max;
 import javax.validation.constraints.Min;
 import javax.validation.constraints.NotNull;
 
-public class DimmableLightSaveRequest {
+public class DimmableSaveRequest {
 
     /** Device id (used only for update requests) */
-    private Long id;
+    private long id;
 
     /** The light intensity value. Goes from 0 (off) to 100 (on) */
     @NotNull
@@ -48,11 +48,11 @@ public class DimmableLightSaveRequest {
         this.intensity = intensity;
     }
 
-    public Long getId() {
+    public long getId() {
         return id;
     }
 
-    public void setId(Long id) {
+    public void setId(long id) {
         this.id = id;
     }
 }

src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/dto/SecurityCameraSaveRequest.java

@@ -1,53 +0,0 @@
-package ch.usi.inf.sa4.sanmarinoes.smarthut.dto;
-
-import javax.validation.constraints.NotNull;
-
-public class SecurityCameraSaveRequest {
-
-    /** The state of this Security Camera */
-    private boolean on;
-
-    /** Device identifier */
-    private Long id;
-
-    /**
-     * The room this device belongs in, as a foreign key id. To use when updating and inserting from
-     * a REST call.
-     */
-    @NotNull private Long roomId;
-
-    /** The name of the device as assigned by the user (e.g. 'Master bedroom light') */
-    @NotNull private String name;
-
-    public void setRoomId(Long roomId) {
-        this.roomId = roomId;
-    }
-
-    public void setName(String name) {
-        this.name = name;
-    }
-
-    public long getId() {
-        return id;
-    }
-
-    public Long getRoomId() {
-        return roomId;
-    }
-
-    public String getName() {
-        return name;
-    }
-
-    public boolean isOn() {
-        return on;
-    }
-
-    public void setOn(boolean on) {
-        this.on = on;
-    }
-
-    public void setId(long id) {
-        this.id = id;
-    }
-}

src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/dto/SmartPlugSaveRequest.java

@@ -1,52 +0,0 @@
-package ch.usi.inf.sa4.sanmarinoes.smarthut.dto;
-
-import javax.validation.constraints.NotNull;
-
-public class SmartPlugSaveRequest {
-    /** Whether the smart plug is on */
-    @NotNull private boolean on;
-
-    /** Device identifier */
-    private long id;
-
-    /**
-     * The room this device belongs in, as a foreign key id. To use when updating and inserting from
-     * a REST call.
-     */
-    @NotNull private Long roomId;
-
-    /** The name of the device as assigned by the user (e.g. 'Master bedroom light') */
-    @NotNull private String name;
-
-    public void setRoomId(Long roomId) {
-        this.roomId = roomId;
-    }
-
-    public void setName(String name) {
-        this.name = name;
-    }
-
-    public long getId() {
-        return id;
-    }
-
-    public Long getRoomId() {
-        return roomId;
-    }
-
-    public String getName() {
-        return name;
-    }
-
-    public boolean isOn() {
-        return on;
-    }
-
-    public void setOn(boolean on) {
-        this.on = on;
-    }
-
-    public void setId(long id) {
-        this.id = id;
-    }
-}

src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/dto/SwitchableSaveRequest.java

@@ -2,12 +2,12 @@ package ch.usi.inf.sa4.sanmarinoes.smarthut.dto;
 
 import javax.validation.constraints.NotNull;
 
-public class RegularLightSaveRequest {
+public class SwitchableSaveRequest {
     /** The state of this switch */
     private boolean on;
 
     /** Device identifier */
-    private Long id;
+    private long id;
 
     /**
      * The room this device belongs in, as a foreign key id. To use when updating and inserting from

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

@@ -18,14 +18,14 @@ public class ButtonDimmer extends Dimmer {
 
     /** Increases the current intensity level of the dimmable light by DIM_INCREMENT */
     public void increaseIntensity() {
-        for (DimmableLight dl : getOutputs()) {
+        for (Dimmable dl : getOutputs()) {
             dl.setIntensity(dl.getIntensity() + DIM_INCREMENT);
         }
     }
 
     /** Decreases the current intensity level of the dimmable light by DIM_INCREMENT */
     public void decreaseIntensity() {
-        for (DimmableLight dl : getOutputs()) {
+        for (Dimmable dl : getOutputs()) {
             dl.setIntensity(dl.getIntensity() - DIM_INCREMENT);
         }
     }

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

@@ -23,25 +23,25 @@ public interface Connector<I extends InputDevice, O extends OutputDevice> {
     void connect(I input, O output, boolean connect);
 
     /**
-     * Produces a basic implementation of a connector, assuming there is a OneToMany relationship
+     * 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 inputSetter the setter method for the input id on the output 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, BiConsumer<K, Long> inputSetter) {
+            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);
             }
-
-            inputSetter.accept(o, connect ? i.getId() : null);
         };
     }
 }

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

@@ -1,41 +1,14 @@
 package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
 
-import javax.persistence.Column;
 import javax.persistence.Entity;
-import javax.validation.constraints.Max;
-import javax.validation.constraints.Min;
-import javax.validation.constraints.NotNull;
-
-@Entity
-public class Curtains extends OutputDevice {
 
 /**
-     * it represents how much the curtains are opened, 0 is completely closed 100 is completely open
+ * Represents a curtain. The intensity represents how much the curtains are opened,
+ * 0 is completely closed 100 is completely open
  */
-    @NotNull
+@Entity
-    @Column(nullable = false)
+public class Curtains extends Dimmable {
-    @Min(0)
-    @Max(100)
-    private int openedAmount;
-
     public Curtains() {
         super("curtains");
-        this.openedAmount = 0;
-    }
-
-    /** return the current state of the curtain */
-    public int getOpenedAmount() {
-        return this.openedAmount;
-    }
-
-    /** sets the state to a desired one */
-    public void setOpenedAmount(int newOpening) {
-        if (newOpening < 0) {
-            this.openedAmount = 0;
-        } else if (newOpening > 100) {
-            this.openedAmount = 100;
-        } else {
-            this.openedAmount = newOpening;
-        }
     }
 }

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

@@ -1,3 +1,3 @@
 package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
 
-public interface CurtainsRepository extends DeviceRepository<Curtains> {}
+public interface CurtainsRepository extends DimmableRepository<Curtains> {}

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

@@ -8,7 +8,7 @@ import javax.validation.constraints.NotNull;
 
 /** Generic abstraction for a smart home device */
 @Entity
-@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
+@Inheritance(strategy = InheritanceType.JOINED)
 public abstract class Device {
 
     /** Ways a device can behave in the automation flow. For now only input/output */

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

@@ -0,0 +1,78 @@
+package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
+
+import ch.usi.inf.sa4.sanmarinoes.smarthut.config.GsonExclude;
+
+import javax.persistence.*;
+import javax.validation.constraints.Max;
+import javax.validation.constraints.Min;
+import javax.validation.constraints.NotNull;
+import java.util.Set;
+
+@Entity
+@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
+public class Dimmable extends Switchable {
+
+    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);
+    }
+
+    @ManyToMany(mappedBy = "dimmables", cascade = CascadeType.DETACH)
+    @GsonExclude
+    private Set<Dimmer> dimmers;
+
+    /** The light intensity value. Goes from 0 (off) to 100 (on) */
+    @NotNull
+    @Column(nullable = false)
+    @Min(0)
+    @Max(100)
+    private Integer intensity = 0;
+
+    @NotNull
+    @Column(nullable = false)
+    private Integer oldIntensity = 100;
+
+    public Integer getIntensity() {
+        return intensity;
+    }
+
+    /**
+     * Sets the intensity to a certain level. Out of bound values are corrected to the respective
+     * extremums. An intensity level of 0 turns the light off, but keeps the old intensity level
+     * stored.
+     *
+     * @param intensity the intensity level (may be out of bounds)
+     */
+    public void setIntensity(Integer intensity) {
+        if (intensity <= 0) {
+            this.intensity = 0;
+        } else if (intensity > 100) {
+            this.intensity = 100;
+            this.oldIntensity = 100;
+        } else {
+            this.intensity = intensity;
+            this.oldIntensity = intensity;
+        }
+    }
+
+    @Override
+    public boolean isOn() {
+        return intensity != 0;
+    }
+
+    @Override
+    public void setOn(boolean on) {
+        intensity = on ? oldIntensity : 0;
+    }
+
+    public Set<Dimmer> getDimmers() {
+        return this.dimmers;
+    }
+}

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

@@ -1,89 +1,11 @@
 package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
 
-import ch.usi.inf.sa4.sanmarinoes.smarthut.config.GsonExclude;
+import javax.persistence.*;
-import javax.persistence.Column;
-import javax.persistence.Entity;
-import javax.persistence.JoinColumn;
-import javax.persistence.ManyToOne;
-import javax.validation.constraints.Max;
-import javax.validation.constraints.Min;
-import javax.validation.constraints.NotNull;
 
 /** Represent a dimmable light */
 @Entity
-public class DimmableLight extends Switchable {
+public class DimmableLight extends Dimmable {
-
-    public static final Connector<ButtonDimmer, DimmableLight>
-            BUTTON_DIMMER_DIMMABLE_LIGHT_CONNECTOR =
-                    Connector.basic(ButtonDimmer::getOutputs, DimmableLight::setDimmerId);
-
-    public static final Connector<KnobDimmer, DimmableLight> KNOB_DIMMER_DIMMABLE_LIGHT_CONNECTOR =
-            Connector.basic(KnobDimmer::getOutputs, DimmableLight::setDimmerId);
-
     public DimmableLight() {
         super("dimmableLight");
     }
-
-    @ManyToOne
-    @GsonExclude
-    @JoinColumn(name = "dimmer_id", updatable = false, insertable = false)
-    private Dimmer dimmer;
-
-    @Column(name = "dimmer_id")
-    private Long dimmerId;
-
-    /** The light intensity value. Goes from 0 (off) to 100 (on) */
-    @NotNull
-    @Column(nullable = false)
-    @Min(0)
-    @Max(100)
-    private Integer intensity = 0;
-
-    @NotNull
-    @Column(nullable = false)
-    private Integer oldIntensity = 100;
-
-    public Integer getIntensity() {
-        return intensity;
-    }
-
-    /**
-     * Sets the intensity to a certain level. Out of bound values are corrected to the respective
-     * extremums. An intensity level of 0 turns the light off, but keeps the old intensity level
-     * stored.
-     *
-     * @param intensity the intensity level (may be out of bounds)
-     */
-    public void setIntensity(Integer intensity) {
-        if (intensity <= 0) {
-            this.intensity = 0;
-        } else if (intensity > 100) {
-            this.intensity = 100;
-            this.oldIntensity = 100;
-        } else {
-            this.intensity = intensity;
-            this.oldIntensity = intensity;
-        }
-    }
-
-    @Override
-    public boolean isOn() {
-        return intensity != 0;
-    }
-
-    @Override
-    public void setOn(boolean on) {
-        intensity = on ? oldIntensity : 0;
-    }
-
-    public void setDimmerId(Long dimmerId) {
-        this.dimmerId = dimmerId;
-        super.setSwitchId(null);
-    }
-
-    @Override
-    public void setSwitchId(Long switchId) {
-        super.setSwitchId(switchId);
-        this.dimmerId = null;
-    }
 }

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

@@ -1,3 +1,3 @@
 package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
 
-public interface DimmableLightRepository extends SwitchableRepository<DimmableLight> {}
+public interface DimmableLightRepository extends DimmableRepository<DimmableLight> {}

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

@@ -0,0 +1,4 @@
+package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
+
+public interface DimmableRepository<T extends Dimmable> extends SwitchableRepository<T> {
+}

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

@@ -1,12 +1,10 @@
 package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
 
+import ch.usi.inf.sa4.sanmarinoes.smarthut.config.GsonExclude;
+
 import java.util.HashSet;
 import java.util.Set;
-import javax.persistence.Entity;
+import javax.persistence.*;
-import javax.persistence.Inheritance;
-import javax.persistence.InheritanceType;
-import javax.persistence.OneToMany;
-import javax.persistence.PreRemove;
 
 /** Represents a generic dimmer input device */
 @Entity
@@ -16,8 +14,14 @@ public abstract class Dimmer extends InputDevice {
         super(kind);
     }
 
-    @OneToMany(mappedBy = "dimmer")
+    @ManyToMany(cascade = CascadeType.DETACH)
-    private Set<DimmableLight> lights = new HashSet<>();
+    @GsonExclude
+    @JoinTable(
+            name = "dimmer_dimmable",
+            joinColumns = @JoinColumn(name = "dimmer_id"),
+            inverseJoinColumns = @JoinColumn(name = "dimmable_id")
+    )
+    private Set<Dimmable> dimmables = new HashSet<>();
 
     /**
      * Get the lights connected to this dimmer
@@ -25,19 +29,12 @@ public abstract class Dimmer extends InputDevice {
      * @return duh
      */
     @Override
-    public Set<DimmableLight> getOutputs() {
+    public Set<Dimmable> getOutputs() {
-        return this.lights;
+        return this.dimmables;
     }
 
     /** Add a light to be controller by this dimmer */
-    public void addDimmableLight(DimmableLight dimmableLight) {
+    public void addDimmable(Dimmable dimmableLight) {
-        lights.add(dimmableLight);
+        dimmables.add(dimmableLight);
-    }
-
-    @PreRemove
-    private void removeLightsFromDimmer() {
-        for (DimmableLight dl : getOutputs()) {
-            dl.setDimmerId(null);
-        }
     }
 }

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

@@ -10,7 +10,7 @@ import javax.persistence.InheritanceType;
  * environment (sensor) or the user (switch / dimmer).
  */
 @Entity
-@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
+@Inheritance(strategy = InheritanceType.JOINED)
 public abstract class InputDevice extends Device {
     public InputDevice(String kind) {
         super(kind, FlowType.INPUT);

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

@@ -24,7 +24,7 @@ public class KnobDimmer extends Dimmer {
      */
     public void setLightIntensity(int intensity) {
         this.intensity = intensity;
-        for (DimmableLight dl : getOutputs()) {
+        for (Dimmable dl : getOutputs()) {
             dl.setIntensity(intensity);
         }
     }

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

@@ -7,7 +7,7 @@ import javax.persistence.*;
  * ...).
  */
 @Entity
-@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
+@Inheritance(strategy = InheritanceType.JOINED)
 public abstract class OutputDevice extends Device {
     public OutputDevice(String kind) {
         super(kind, FlowType.OUTPUT);

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

@@ -1,5 +1,7 @@
 package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
 
+import com.google.common.base.Objects;
+
 import java.math.BigDecimal;
 import javax.persistence.Column;
 import javax.persistence.Entity;
@@ -44,4 +46,12 @@ public class SmartPlug extends Switchable {
     public SmartPlug() {
         super("smartPlug");
     }
+
+    @Override
+    public String toString() {
+        return Objects.toStringHelper(this)
+                .add("totalConsumption", totalConsumption)
+                .add("on", on)
+                .toString();
+    }
 }

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

@@ -1,17 +1,22 @@
 package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
 
+import ch.usi.inf.sa4.sanmarinoes.smarthut.config.GsonExclude;
+
 import java.util.HashSet;
 import java.util.Set;
-import javax.persistence.Column;
+import javax.persistence.*;
-import javax.persistence.Entity;
-import javax.persistence.OneToMany;
-import javax.persistence.PreRemove;
 
 /** A switch input device */
 @Entity
 public class Switch extends InputDevice {
 
-    @OneToMany(mappedBy = "switchDevice")
+    @ManyToMany(cascade = CascadeType.DETACH)
+    @GsonExclude
+    @JoinTable(
+            name = "switch_switchable",
+            joinColumns = @JoinColumn(name = "switch_id"),
+            inverseJoinColumns = @JoinColumn(name = "switchable_id")
+    )
     private Set<Switchable> switchables = new HashSet<>();
 
     /** The state of this switch */
@@ -52,11 +57,4 @@ public class Switch extends InputDevice {
     public Set<Switchable> getOutputs() {
         return switchables;
     }
-
-    @PreRemove
-    public void removeSwitchable() {
-        for (Switchable s : getOutputs()) {
-            s.setSwitchId(null);
-        }
-    }
 }

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

@@ -2,22 +2,20 @@ package ch.usi.inf.sa4.sanmarinoes.smarthut.models;
 
 import ch.usi.inf.sa4.sanmarinoes.smarthut.config.GsonExclude;
 import javax.persistence.*;
+import java.util.HashSet;
+import java.util.Set;
 
 /** A device that can be turned either on or off */
 @Entity
-@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
+@Inheritance(strategy = InheritanceType.JOINED)
 public abstract class Switchable extends OutputDevice {
 
     public static final Connector<Switch, Switchable> SWITCH_SWITCHABLE_CONNECTOR =
-            Connector.basic(Switch::getOutputs, Switchable::setSwitchId);
+            Connector.basic(Switch::getOutputs, Switchable::getSwitches);
 
-    @ManyToOne
+    @ManyToMany(mappedBy = "switchables", cascade = CascadeType.DETACH)
     @GsonExclude
-    @JoinColumn(name = "switch_id", updatable = false, insertable = false)
+    private Set<Switch> inputs = new HashSet<>();
-    private Switch switchDevice;
-
-    @Column(name = "switch_id")
-    private Long switchId;
 
     protected Switchable(String kind) {
         super(kind);
@@ -37,11 +35,7 @@ public abstract class Switchable extends OutputDevice {
      */
     public abstract void setOn(boolean on);
 
-    public Long getSwitchId() {
+    public Set<Switch> getSwitches() {
-        return switchId;
+        return inputs;
-    }
-
-    public void setSwitchId(Long switchId) {
-        this.switchId = switchId;
     }
 }

src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/utils/Utils.java

@@ -14,7 +14,7 @@ public final class Utils {
         void apply(T input) throws Throwable;
     }
 
-    public static <T> List<T> toList(Iterable<T> iterable) {
+    public static <T> List<T> toList(Iterable<? extends T> iterable) {
         return StreamSupport.stream(iterable.spliterator(), false).collect(Collectors.toList());
     }
 

src/test/java/ch/usi/inf/sa4/sanmarinoes/smarthut/ButtonDimmerTests.java

@@ -3,6 +3,7 @@ package ch.usi.inf.sa4.sanmarinoes.smarthut;
 import static org.junit.jupiter.api.Assertions.*;
 
 import ch.usi.inf.sa4.sanmarinoes.smarthut.models.ButtonDimmer;
+import ch.usi.inf.sa4.sanmarinoes.smarthut.models.Dimmable;
 import ch.usi.inf.sa4.sanmarinoes.smarthut.models.DimmableLight;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.DisplayName;
@@ -30,7 +31,7 @@ public class ButtonDimmerTests {
                 dl = new DimmableLight();
                 dl.setIntensity(10);
                 ;
-                buttonDimmer.addDimmableLight(dl);
+                buttonDimmer.addDimmable(dl);
             }
         }
 
@@ -38,7 +39,7 @@ public class ButtonDimmerTests {
         @DisplayName(" increase the intensity ")
         public void increase() {
             buttonDimmer.increaseIntensity();
-            for (DimmableLight dl : buttonDimmer.getOutputs()) {
+            for (Dimmable dl : buttonDimmer.getOutputs()) {
                 assertTrue(dl.getIntensity() > 10);
             }
         }
@@ -47,7 +48,7 @@ public class ButtonDimmerTests {
         @DisplayName(" decrease the intensity ")
         public void decrease() {
             buttonDimmer.decreaseIntensity();
-            for (DimmableLight dl : buttonDimmer.getOutputs()) {
+            for (Dimmable dl : buttonDimmer.getOutputs()) {
                 assertTrue(dl.getIntensity() < 10);
             }
         }

src/test/java/ch/usi/inf/sa4/sanmarinoes/smarthut/CurtainsTests.java

@@ -19,27 +19,27 @@ public class CurtainsTests {
     @Test
     @DisplayName("State when just created")
     public void initialState() {
-        assertEquals(0, this.curtains.getOpenedAmount());
+        assertEquals(0, this.curtains.getIntensity());
     }
 
     @Test
     @DisplayName("Check wether setting the opening works")
     public void normalSet() {
-        this.curtains.setOpenedAmount(42);
+        this.curtains.setIntensity(42);
-        assertEquals(42, this.curtains.getOpenedAmount());
+        assertEquals(42, this.curtains.getIntensity());
     }
 
     @Test
     @DisplayName("Set setting a negative number")
     public void setNeg() {
-        this.curtains.setOpenedAmount(-1);
+        this.curtains.setIntensity(-1);
-        assertEquals(0, this.curtains.getOpenedAmount());
+        assertEquals(0, this.curtains.getIntensity());
     }
 
     @Test
     @DisplayName("Setting state to a number greater than 100")
     public void setLarge() {
-        this.curtains.setOpenedAmount(32768);
+        this.curtains.setIntensity(32768);
-        assertEquals(100, this.curtains.getOpenedAmount());
+        assertEquals(100, this.curtains.getIntensity());
     }
 }

src/test/java/ch/usi/inf/sa4/sanmarinoes/smarthut/KnobDimmerTests.java

@@ -2,6 +2,7 @@ package ch.usi.inf.sa4.sanmarinoes.smarthut;
 
 import static org.junit.jupiter.api.Assertions.*;
 
+import ch.usi.inf.sa4.sanmarinoes.smarthut.models.Dimmable;
 import ch.usi.inf.sa4.sanmarinoes.smarthut.models.DimmableLight;
 import ch.usi.inf.sa4.sanmarinoes.smarthut.models.KnobDimmer;
 import org.junit.jupiter.api.BeforeEach;
@@ -30,7 +31,7 @@ public class KnobDimmerTests {
                 dl = new DimmableLight();
                 dl.setIntensity(10);
                 ;
-                knobDimmer.addDimmableLight(dl);
+                knobDimmer.addDimmable(dl);
             }
         }
 
@@ -38,7 +39,7 @@ public class KnobDimmerTests {
         @DisplayName(" set the intensity ")
         public void increase() {
             knobDimmer.setLightIntensity(30);
-            for (DimmableLight dl : knobDimmer.getOutputs()) {
+            for (Dimmable dl : knobDimmer.getOutputs()) {
                 assertEquals(30, dl.getIntensity());
             }
         }