Moved some bundle stuff into BundleUtil. Added methods to support

post-parsing tileset validation.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@699 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/media/tile/bundle/BundleUtil.java

@@ -0,0 +1,38 @@
+//
+// $Id: BundleUtil.java,v 1.1 2001/11/29 21:57:31 mdb Exp $
+
+package com.threerings.media.tile.bundle;
+
+import java.io.BufferedInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.ObjectInputStream;
+
+import com.threerings.resource.ResourceBundle;
+
+/**
+ * Bundle related utility functions.
+ */
+public class BundleUtil
+{
+    /** The path to the metadata resource that we will attempt to load
+     * from our resource set. */
+    public static final String METADATA_PATH = "tsbundles.dat";
+
+    /**
+     * Extracts and initializes a serialized tileset bundle instance from
+     * the supplied resource bundle.
+     */
+    public static TileSetBundle extractBundle (ResourceBundle bundle)
+        throws IOException, ClassNotFoundException
+    {
+        // unserialize the tileset bundles array
+        InputStream tbin = bundle.getResource(METADATA_PATH);
+        ObjectInputStream oin = new ObjectInputStream(
+            new BufferedInputStream(tbin));
+        TileSetBundle tsb = (TileSetBundle)oin.readObject();
+        // initialize the bundle and add it to the list
+        tsb.init(bundle);
+        return tsb;
+    }
+}