- use JmeSystem.getStorageFolder() for SaveGame util

- move SaveGame util to core plugins
- fix BinaryImporter accessing assetManager if null

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@8872 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

engine/src/core-plugins/com/jme3/export/binary/BinaryImporter.java

@@ -325,7 +325,12 @@ public final class BinaryImporter implements JmeImporter {
             int dataLength = ByteUtils.convertIntFromBytes(dataArray, loc);
             loc+=4;
 
-            Savable out = SavableClassUtil.fromName(bco.className, assetManager.getClassLoaders());
+            Savable out = null;
+            if (assetManager != null) {
+                out = SavableClassUtil.fromName(bco.className, assetManager.getClassLoaders());
+            } else {
+                out = SavableClassUtil.fromName(bco.className);
+            }
 
             BinaryInputCapsule cap = new BinaryInputCapsule(this, out, bco);
             cap.setContent(dataArray, loc, loc+dataLength);

engine/src/tools/jme3tools/savegame/SaveGame.java

@@ -0,0 +1,118 @@
+/*
+ * To change this template, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package jme3tools.savegame;
+
+import com.jme3.asset.AssetManager;
+import com.jme3.export.Savable;
+import com.jme3.export.binary.BinaryExporter;
+import com.jme3.export.binary.BinaryImporter;
+import com.jme3.system.JmeSystem;
+import java.io.BufferedInputStream;
+import java.io.BufferedOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import java.util.zip.GZIPInputStream;
+import java.util.zip.GZIPOutputStream;
+
+/**
+ * Tool for saving Savables as SaveGame entries in a system-dependent way.
+ * @author normenhansen
+ */
+public class SaveGame {
+
+    /**
+     * Saves a savable in a system-dependent way.
+     * @param gamePath A unique path for this game, e.g. com/mycompany/mygame
+     * @param dataName A unique name for this savegame, e.g. "save_001"
+     * @param data The Savable to save
+     */
+    public static void saveGame(String gamePath, String dataName, Savable data) {
+        BinaryExporter ex = BinaryExporter.getInstance();
+        OutputStream os = null;
+        try {
+            File daveFolder = new File(JmeSystem.getStorageFolder().getAbsolutePath() + File.separator + gamePath.replaceAll("/", File.separator));
+            if (!daveFolder.exists() && !daveFolder.mkdirs()) {
+                Logger.getLogger(SaveGame.class.getName()).log(Level.SEVERE, "Error creating save file!");
+                throw new IllegalStateException("SaveGame dataset cannot be created");
+            }
+            File saveFile = new File(daveFolder.getAbsolutePath() + File.separator + dataName);
+            if (!saveFile.exists()) {
+                if (!saveFile.createNewFile()) {
+                    Logger.getLogger(SaveGame.class.getName()).log(Level.SEVERE, "Error creating save file!");
+                    throw new IllegalStateException("SaveGame dataset cannot be created");
+                }
+            }
+            os = new GZIPOutputStream(new BufferedOutputStream(new FileOutputStream(saveFile)));
+            ex.save(data, os);
+        } catch (IOException ex1) {
+            Logger.getLogger(SaveGame.class.getName()).log(Level.SEVERE, "Error saving data: {0}", ex1);
+            ex1.printStackTrace();
+            throw new IllegalStateException("SaveGame dataset cannot be saved");
+        } finally {
+            try {
+                if (os != null) {
+                    os.close();
+                }
+            } catch (IOException ex1) {
+                Logger.getLogger(SaveGame.class.getName()).log(Level.SEVERE, "Error saving data: {0}", ex1);
+                ex1.printStackTrace();
+                throw new IllegalStateException("SaveGame dataset cannot be saved");
+            }
+        }
+    }
+
+    /**
+     * Loads a savable that has been saved on this system with saveGame() before.
+     * @param gamePath A unique path for this game, e.g. com/mycompany/mygame
+     * @param dataName A unique name for this savegame, e.g. "save_001"
+     * @return The savable that was saved
+     */
+    public static Savable loadGame(String gamePath, String dataName) {
+        return loadGame(gamePath, dataName, null);
+    }
+
+    /**
+     * Loads a savable that has been saved on this system with saveGame() before.
+     * @param gamePath A unique path for this game, e.g. com/mycompany/mygame
+     * @param dataName A unique name for this savegame, e.g. "save_001"
+     * @param assetManager Link to an AssetManager if required for loading the data (e.g. models with textures)
+     * @return The savable that was saved or null if none was found
+     */
+    public static Savable loadGame(String gamePath, String dataName, AssetManager manager) {
+        InputStream is = null;
+        Savable sav = null;
+        try {
+            File file = new File(JmeSystem.getStorageFolder().getAbsolutePath() + File.separator + gamePath.replaceAll("/", File.separator) + File.separator + dataName);
+            if(!file.exists()){
+                return null;
+            }
+            is = new GZIPInputStream(new BufferedInputStream(new FileInputStream(file)));
+            BinaryImporter imp = BinaryImporter.getInstance();
+            if (manager != null) {
+                imp.setAssetManager(manager);
+            }
+            sav = imp.load(is);
+        } catch (IOException ex) {
+            Logger.getLogger(SaveGame.class.getName()).log(Level.SEVERE, "Error loading data: {0}", ex);
+            ex.printStackTrace();
+        } finally {
+            if (is != null) {
+                try {
+                    is.close();
+                } catch (IOException ex) {
+                    Logger.getLogger(SaveGame.class.getName()).log(Level.SEVERE, "Error loading data: {0}", ex);
+                    ex.printStackTrace();
+                }
+            }
+        }
+        return sav;
+    }
+}