Memory usage improvements:

- blender context now disposes all its stored data and properly closes the BlenderInputStream
- fixed an error that causes unnecessary huge memory allocation in BlenderInputStream

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@9795 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

engine/src/blender/com/jme3/scene/plugins/blender/BlenderContext.java

@@ -31,6 +31,15 @@
  */
 package com.jme3.scene.plugins.blender;
 
+import java.util.ArrayList;
+import java.util.EmptyStackException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Stack;
+import java.util.logging.Logger;
+
 import com.jme3.animation.Bone;
 import com.jme3.animation.Skeleton;
 import com.jme3.asset.AssetManager;
@@ -47,16 +56,6 @@ import com.jme3.scene.plugins.blender.file.Structure;
 import com.jme3.scene.plugins.blender.meshes.MeshContext;
 import com.jme3.scene.plugins.blender.modifiers.Modifier;
 import com.jme3.scene.plugins.ogre.AnimData;
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.EmptyStackException;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.Map.Entry;
-import java.util.Stack;
-import java.util.logging.Level;
-import java.util.logging.Logger;
 
 /**
  * The class that stores temporary data and manages it during loading the belnd
@@ -629,14 +628,23 @@ public class BlenderContext {
 		return blenderKey.getDefaultMaterial();
 	}
 
+	/**
+	 * Clears all sotred resources and closes the blender input stream.
+	 */
 	public void dispose() {
-		try {
+		LOGGER.fine("Disposing blender context resources.");
-			inputStream.close();
+		inputStream.forceClose();
-		} catch (IOException e) {
-			LOGGER.log(Level.SEVERE, e.getLocalizedMessage(), e);
-		}
 		loadedFeatures.clear();
 		loadedFeaturesByName.clear();
+		parentStack.clear();
+		loadedIpos.clear();
+		modifiers.clear();
+		constraints.clear();
+		animData.clear();
+		skeletons.clear();
+		meshContexts.clear();
+		boneContexts.clear();
+		helpers.clear();
 	}
 
 	/**

engine/src/blender/com/jme3/scene/plugins/blender/file/BlenderInputStream.java

@@ -31,8 +31,6 @@
  */
 package com.jme3.scene.plugins.blender.file;
 
-import com.jme3.asset.AssetManager;
-import com.jme3.scene.plugins.blender.exceptions.BlenderFileException;
 import java.io.BufferedInputStream;
 import java.io.ByteArrayInputStream;
 import java.io.IOException;
@@ -40,6 +38,9 @@ import java.io.InputStream;
 import java.util.logging.Logger;
 import java.util.zip.GZIPInputStream;
 
+import com.jme3.asset.AssetManager;
+import com.jme3.scene.plugins.blender.exceptions.BlenderFileException;
+
 /**
  * An input stream with random access to data.
  * @author Marcin Roguski
@@ -67,8 +68,6 @@ public class BlenderInputStream extends InputStream {
     protected int size;
     /** The current position of the read cursor. */
     protected int position;
-	/** The input stream we read the data from. */
-	protected InputStream		inputStream;
 
     /**
      * Constructor. The input stream is stored and used to read data.
@@ -81,7 +80,6 @@ public class BlenderInputStream extends InputStream {
      */
     public BlenderInputStream(InputStream inputStream, AssetManager assetManager) throws BlenderFileException {
         this.assetManager = assetManager;
-        this.inputStream = inputStream;
         //the size value will canche while reading the file; the available() method cannot be counted on
         try {
             size = inputStream.available();
@@ -104,6 +102,12 @@ public class BlenderInputStream extends InputStream {
             this.readStreamToCache(bufferedInputStream);
         } catch (IOException e) {
             throw new BlenderFileException("Problems occured while caching the file!", e);
+        } finally {
+        	try {
+				inputStream.close();
+			} catch (IOException e) {
+				LOGGER.warning("Unable to close stream with blender file.");
+			}
         }
 
         try {
@@ -128,12 +132,12 @@ public class BlenderInputStream extends InputStream {
         cachedBuffer = new byte[size];
         size = 0;//this will count the actual size
         while (data != -1) {
-            cachedBuffer[size++] = (byte) data;
+        	if (size >= cachedBuffer.length) {//widen the cached array
-            if (size >= cachedBuffer.length) {//widen the cached array
                 byte[] newBuffer = new byte[cachedBuffer.length + (cachedBuffer.length >> 1)];
                 System.arraycopy(cachedBuffer, 0, newBuffer, 0, cachedBuffer.length);
                 cachedBuffer = newBuffer;
             }
+        	cachedBuffer[size++] = (byte) data;
             data = inputStream.read();
         }
     }
@@ -375,9 +379,12 @@ public class BlenderInputStream extends InputStream {
     }
 
     @Override
-    public void close() throws IOException {
+    public void close() throws IOException { }
-		inputStream.close();
+    
-//		cachedBuffer = null;
+    /**
-//		size = position = 0;
+     * This method should be used to close the stream because some loaders may close the stream while reading resources from it.
+     */
+    public void forceClose() {
+    	cachedBuffer = null;
     }
 }