Since input manager throws an exception when trying

to delete non-existent mappings, and since I'm loathe
to change this behavior even though I kind of don't
agree with it...
instead, I've added a hasMapping() method so that
callers can avoid deleting non-existant mappings
without having to do all of their own book-keeping.


git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@9164 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

engine/src/core/com/jme3/input/InputManager.java

@@ -543,6 +543,19 @@ public class InputManager implements RawInputListener {
         }
     }
 
+    /**
+     * Returns true if this InputManager has a mapping registered
+     * for the given mappingName.
+     *
+     * @param mappingName The mapping name to check.
+     *
+     * @see InputManager#addMapping(java.lang.String, com.jme3.input.controls.Trigger[]) 
+     * @see InputManager#deleteMapping(java.lang.String) 
+     */ 
+    public boolean hasMapping(String mappingName) {
+        return mappings.containsKey(mappingName);
+    }
+    
     /**
      * Deletes a mapping from receiving trigger events.
      *