diff src/org/tmatesoft/hg/util/RegularFileInfo.java @ 287:ed6b74a58c66

Use FileInfo abstraction with necessary subset of File functionality instead of File to facilitate other effective file system iterators
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 07 Sep 2011 09:33:27 +0200
parents
children 981f9f50bb6c
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/tmatesoft/hg/util/RegularFileInfo.java	Wed Sep 07 09:33:27 2011 +0200
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2011 TMate Software Ltd
+ *  
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * 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 General Public License for more details.
+ *
+ * For information on how to redistribute this software under
+ * the terms of a license other than GNU General Public License
+ * contact TMate Software at support@hg4j.com
+ */
+package org.tmatesoft.hg.util;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.channels.ReadableByteChannel;
+
+/**
+ *
+ * @author Artem Tikhomirov
+ * @author TMate Software Ltd.
+ */
+public class RegularFileInfo implements FileInfo {
+	private File file;
+	
+	public RegularFileInfo() {
+	}
+	
+	public void init(File f) {
+		file = f;
+	}
+	
+	public boolean exists() {
+		return file.canRead() && file.isFile();
+	}
+
+	public int lastModified() {
+		return (int) (file.lastModified() / 1000);
+	}
+
+	public long length() {
+		return file.length();
+	}
+
+	public ReadableByteChannel newInputChannel() {
+		try {
+			return new FileInputStream(file).getChannel();
+		} catch (FileNotFoundException ex) {
+			ex.printStackTrace(); // FIXME log debug.
+			// shall not happen, provided this class is used correctly
+			return new ReadableByteChannel() {
+				
+				public boolean isOpen() {
+					return true;
+				}
+				
+				public void close() throws IOException {
+				}
+				
+				public int read(ByteBuffer dst) throws IOException {
+					// EOF right away
+					return -1;
+				}
+			};
+		}
+	}
+
+}