If state conversion fails use original value instead of null

bundles/core/org.eclipse.smarthome.core/src/main/java/org/eclipse/smarthome/core/library/items/ColorItem.java

@@ -89,7 +89,13 @@ public void setState(State state) {
  applyState(state);
  }
  } else {
- applyState(state.as(HSBType.class));
+ // try conversion
+ State convertedState = state.as(HSBType.class);
+ if (convertedState != null) {
+ applyState(convertedState);
+ } else {
+ applyState(state);
+ }
  }
  }
 

bundles/core/org.eclipse.smarthome.core/src/main/java/org/eclipse/smarthome/core/library/items/DimmerItem.java

@@ -71,7 +71,13 @@ public List<Class<? extends Command>> getAcceptedCommandTypes() {
  */
  @Override
  public void setState(State state) {
- applyState(state.as(PercentType.class));
+ // try conversion
+ State convertedState = state.as(PercentType.class);
+ if (convertedState != null) {
+ applyState(convertedState);
+ } else {
+ applyState(state);
+ }
  }
 
 }

bundles/core/org.eclipse.smarthome.core/src/main/java/org/eclipse/smarthome/core/library/items/RollershutterItem.java

@@ -77,7 +77,13 @@ public void send(PercentType command) {
  */
  @Override
  public void setState(State state) {
- applyState(state.as(PercentType.class));
+ // try conversion
+ State convertedState = state.as(PercentType.class);
+ if (convertedState != null) {
+ applyState(convertedState);
+ } else {
+ applyState(state);
+ }
  }
 
 }