- add SaveGame tool

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@8437 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

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

@@ -0,0 +1,92 @@
+/*
+ * 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.xml.XMLExporter;
+import com.jme3.export.xml.XMLImporter;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.UnsupportedEncodingException;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import java.util.prefs.Preferences;
+
+/**
+ * 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) {
+        Preferences prefs = Preferences.userRoot().node(gamePath);
+        XMLExporter ex = XMLExporter.getInstance();
+        ByteArrayOutputStream out = new ByteArrayOutputStream();
+        try {
+            ex.save(data, out);
+        } catch (IOException ex1) {
+            Logger.getLogger(SaveGame.class.getName()).log(Level.SEVERE, "Error saving data: {0}", ex1);
+            ex1.printStackTrace();
+        }
+        try {
+            prefs.put(dataName, out.toString("UTF-8"));
+        } catch (UnsupportedEncodingException ex1) {
+            Logger.getLogger(SaveGame.class.getName()).log(Level.SEVERE, "Error saving data: {0}", ex1);
+            ex1.printStackTrace();
+        }
+    }
+
+    /**
+     * 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
+     */
+    public static Savable loadGame(String gamePath, String dataName, AssetManager manager) {
+        Preferences prefs = Preferences.userRoot().node(gamePath);
+        String data = prefs.get(gamePath, dataName);
+        InputStream is = null;
+        Savable sav = null;
+        try {
+            is = new ByteArrayInputStream(data.getBytes("UTF-8"));
+            XMLImporter imp = XMLImporter.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);
+        } finally {
+            if (is != null) {
+                try {
+                    is.close();
+                } catch (IOException ex) {
+                    Logger.getLogger(SaveGame.class.getName()).log(Level.SEVERE, "Error loading data: {0}", ex);
+                }
+            }
+        }
+        return sav;
+    }
+}