fix a NPE and a ClassCastExcpetion on Cinematic.clear()

jme3-core/src/main/java/com/jme3/cinematic/Cinematic.java

@@ -702,7 +702,9 @@ public class Cinematic extends AbstractCinematicEvent implements AppState {
         dispose();
         cinematicEvents.clear();
         timeLine.clear();
-        eventsData.clear();
+        if (eventsData != null) {
+            eventsData.clear();
+        }
     }
 
     /**

jme3-core/src/main/java/com/jme3/cinematic/events/AnimationEvent.java

@@ -43,7 +43,7 @@ import com.jme3.export.JmeImporter;
 import com.jme3.export.OutputCapsule;
 import com.jme3.scene.Spatial;
 import java.io.IOException;
-import java.util.ArrayList;
+import java.util.Collection;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.logging.Logger;
@@ -431,15 +431,17 @@ public class AnimationEvent extends AbstractCinematicEvent {
     @Override
     public void dispose() {
         super.dispose();
-        Object o = cinematic.getEventData(MODEL_CHANNELS, model);
-        if (o != null) {
-            ArrayList<AnimChannel> list = (ArrayList<AnimChannel>) o;
-            list.remove(channel);
-            if (list.isEmpty()) {
-                cinematic.removeEventData(MODEL_CHANNELS, model);
+        if (cinematic != null) {
+            Object o = cinematic.getEventData(MODEL_CHANNELS, model);
+            if (o != null) {
+                Collection<AnimChannel> values = ((HashMap<Integer, AnimChannel>) o).values();
+                while (values.remove(channel));
+                if (values.isEmpty()) {
+                    cinematic.removeEventData(MODEL_CHANNELS, model);
+                }
             }
+            cinematic = null;
+            channel = null;
         }
-        cinematic = null;
-        channel = null;
     }
 }

jme3-core/src/test/java/com/jme3/cinematic/CinematicTest.java

@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2009-2015 jMonkeyEngine
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
+ *   may be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package com.jme3.cinematic;
+
+import com.jme3.animation.AnimControl;
+import com.jme3.animation.Animation;
+import com.jme3.cinematic.events.AnimationEvent;
+import com.jme3.scene.Node;
+import org.junit.Test;
+
+/**
+ *
+ * @author davidB
+ */
+public class CinematicTest {
+    
+    /**
+     * No NPE or any exception when clear() a new Cinematic
+     */
+    @Test
+    public void clearEmpty() {
+        Cinematic sut = new Cinematic();
+        sut.clear();
+    }
+    
+    /**
+     * No ClassCastException when clear() a Cinematic with AnimationEvent
+     */
+    @Test
+    public void clearAnimationEvent() {
+        Cinematic sut = new Cinematic();
+        Node model = new Node("model");
+        AnimControl ac = new AnimControl();
+        ac.addAnim(new Animation("animName", 1.0f));
+        model.addControl(ac);
+        sut.enqueueCinematicEvent(new AnimationEvent(model, "animName"));
+        sut.initialize(null, null);
+        sut.clear();
+    }
+}