* Fix ClassCastException when loading old blender-based j3o files

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@9381 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

engine/src/core/com/jme3/export/NullSavable.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2009-2012 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.export;
+
+import java.io.IOException;
+
+/**
+ * NullSavable is an implementation of Savable with no data.
+ * It is used for backward compatibility with versions of the J3O 
+ * format that wrote Blender importer's "Properties" class.
+ * 
+ * @author Kirill Vainer
+ */
+public class NullSavable implements Savable {
+    public void write(JmeExporter ex) throws IOException {
+    }
+    public void read(JmeImporter im) throws IOException {
+    }
+}

engine/src/core/com/jme3/export/SavableClassUtil.java

@@ -70,6 +70,7 @@ public class SavableClassUtil {
         addRemapping("com.jme3.material.Material$MatParamTexture", MatParamTexture.class);
         addRemapping("com.jme3.animation.BoneAnimation", Animation.class);
         addRemapping("com.jme3.animation.SpatialAnimation", Animation.class);
+        addRemapping("com.jme3.scene.plugins.blender.objects.Properties", NullSavable.class);
     }
     
     private static String remapClass(String className) throws ClassNotFoundException {