Button: Add doPressButton() and doReleaseButton() to Button class

As every Button has a node-specific implementation part, this should be
the minimal interface to the backend node emulator for pressing and
releasing a button.

tools/cooja/apps/mspsim/src/org/contikios/cooja/mspmote/interfaces/ESBButton.java

@@ -55,17 +55,27 @@ public class ESBButton extends Button {
   }
 
   public void releaseButton() {
-    mote.esbNode.setButton(false);
+    doReleaseButton();
     setChanged();
     notifyObservers();
   }
 
+  @Override
+  protected void doReleaseButton() {
+    mote.esbNode.setButton(false);
+  }
+
   public void pressButton() {
-    mote.esbNode.setButton(true);
+    doPressButton();
     setChanged();
     notifyObservers();
   }
 
+  @Override
+  protected void doPressButton() {
+    mote.esbNode.setButton(true);
+  }
+
   public boolean isPressed() {
     return false;
   }

tools/cooja/apps/mspsim/src/org/contikios/cooja/mspmote/interfaces/MspButton.java

@@ -62,20 +62,30 @@ public class MspButton extends Button {
     public void pressButton() {
         sim.invokeSimulationThread(new Runnable() {
             public void run() {
-                button.setPressed(true);
+              doPressButton();
             }
         });
     }
 
+    @Override
+    protected void doPressButton() {
+        button.setPressed(true);
+    }
+
     @Override
     public void releaseButton() {
         sim.invokeSimulationThread(new Runnable() {
             public void run() {
-                button.setPressed(false);
+              doReleaseButton();
             }
         });
     }
 
+    @Override
+    protected void doReleaseButton() {
+        button.setPressed(false);
+    }
+
     @Override
     public boolean isPressed() {
         return button.isPressed();

tools/cooja/apps/mspsim/src/org/contikios/cooja/mspmote/interfaces/SkyButton.java

@@ -81,7 +81,8 @@ public class SkyButton extends Button {
     });
   }
 
-  public void doPressButton() {
+  @Override
+  protected void doPressButton() {
     skyMote.skyNode.setButton(true);
   }
 
@@ -93,7 +94,8 @@ public class SkyButton extends Button {
     });
   }
 
-  public void doReleaseButton() {
+  @Override
+  protected void doReleaseButton() {
     skyMote.skyNode.setButton(false);
   }
 

tools/cooja/java/org/contikios/cooja/contikimote/interfaces/ContikiButton.java

@@ -128,7 +128,8 @@ public class ContikiButton extends Button implements ContikiMoteInterface {
     });
   }
 
-  private void doReleaseButton() {
+  @Override
+  protected void doReleaseButton() {
     moteMem.setByteValueOf("simButtonIsDown", (byte) 0);
 
     if (moteMem.getByteValueOf("simButtonIsActive") == 1) {
@@ -142,7 +143,8 @@ public class ContikiButton extends Button implements ContikiMoteInterface {
     }
   }
 
-  private void doPressButton() {
+  @Override
+  protected void doPressButton() {
     moteMem.setByteValueOf("simButtonIsDown", (byte) 1);
 
     if (moteMem.getByteValueOf("simButtonIsActive") == 1) {

tools/cooja/java/org/contikios/cooja/interfaces/Button.java

@@ -59,11 +59,21 @@ public abstract class Button extends MoteInterface {
    */
   public abstract void releaseButton();
 
+  /**
+   * Node-type dependent implementation of pressing a button.
+   */
+  protected abstract void doPressButton();
+
   /**
    * Presses button (if not already pressed).
    */
   public abstract void pressButton();
 
+  /**
+   * Node-type dependent implementation of releasing a button.
+   */
+  protected abstract void doReleaseButton();
+
   /**
    * @return True if button is pressed
    */