add TileCache interface

vtm/src/org/oscim/tilesource/ITileCache.java

@@ -0,0 +1,67 @@
+/*
+ * Copyright 2013 Hannes Janetzek
+ *
+ * This program is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.oscim.tilesource;
+
+import java.io.InputStream;
+import java.io.OutputStream;
+
+import org.oscim.core.Tile;
+
+/*
+ * Thie interface CacheManager defines the operation for the cache.
+ */
+public interface ITileCache {
+
+	/**
+	 * @param tile
+	 *            The accessed tile.
+	 * @return
+	 *         The CacheFile which contains the Fileoutputstream for the cache.
+	 */
+	TileWriter writeTile(Tile tile);
+
+	/**
+	 * @param tile
+	 *            The accessed tile.
+	 * @return
+	 *         The stored file for this tile.
+	 */
+	TileReader getTile(Tile tile);
+
+	/**
+	 * @param size
+	 *            The size for the cache directionary.
+	 */
+	void setCacheSize(long size);
+
+	/**
+	 * @param path
+	 *            The path for the cache directionary in device.
+	 */
+	void setStoragePath(String path);
+
+
+	public interface TileReader {
+		Tile getTile();
+		InputStream getInputStream();
+		int getBytes();
+	}
+
+	public interface TileWriter {
+		Tile getTile();
+		OutputStream getOutputStream();
+		void complete(boolean success);
+	}
+}