created mirror

Java/storage/StreamSet.java

@@ -0,0 +1,63 @@
+/*   
+StreamSet.java
+ *    
+ *    Copyright (c) 2000, Ted Nelson and Tuomas Lukka
+ *
+ *    You may use and distribute under the terms of either the GNU Lesser
+ *    General Public License, either version 2 of the license or,
+ *    at your choice, any later version. Alternatively, you may use and
+ *    distribute under the terms of the XPL.
+ *
+ *    See the LICENSE.lgpl and LICENSE.xpl files for the specific terms of 
+ *    the licenses.
+ *
+ *    This software 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 README
+ *    file for more details.
+ *
+ */
+/*
+ * Written by Tuomas Lukka
+ */
+package org.gzigzag;
+import java.io.*;
+
+/** A multi-file or multi-stream.
+ * Used for reading and writing multiple, named streams.
+ * They may be stored as a directory or as a single file, interleaved.
+ * Make sure you call close() after done with a stream.
+ */
+
+public abstract class StreamSet {
+String rcsid = "$Id: StreamSet.java,v 1.5 2000/09/18 14:28:22 tjl Exp $";
+
+    /** Obtain the inputstream associated with the given id.
+     * @return The input stream, or null if it doesn't exist.
+     */
+    public abstract InputStream getInputStream(String id);
+
+    /** Obtain an OutputStream for appending to the given id's stream.
+     */
+    public abstract OutputStream getAppendStream(String id);
+
+    /** Whether a stream exists.
+     */
+    public abstract boolean exists(String id);
+
+    /** Obtain a writable for a given id.
+     * This is so that string scrolls can work for now - they should
+     * be changed to use the usual routines.
+     */
+    public abstract Writable getWritable(String id);
+
+    /** Obtain a streamset for the given file.
+     * NOT IMPLEMENTED. Should return either directory or single-file
+     * stream set.
+     */
+    static public StreamSet get(File f) {
+	return null;
+    }
+}
+
+