add closer

git-svn-id: http://trooper/svn/projects/jSite/trunk@608 c3eda9e8-030b-0410-8277-bc7414b0a119

diff --git a/src/net/pterodactylus/util/io/Closer.java b/src/net/pterodactylus/util/io/Closer.java
new file mode 100644 (file)
index 0000000..126c202
--- /dev/null
+++ b/src/net/pterodactylus/util/io/Closer.java
@@ -0,0 +1,130 @@
+/*
+ * freenet - Closer.java Copyright © 2007 David Roden
+ * 
+ * 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; either version 2 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 General Public License for more
+ * details.
+ * 
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+package net.pterodactylus.util.io;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.Reader;
+import java.io.Writer;
+import java.util.jar.JarFile;
+import java.util.zip.ZipFile;
+
+/**
+ * Closes various resources. The resources are checked for being
+ * <code>null</code> before being closed, and every possible execption is
+ * swallowed. That makes this class perfect for use in the finally blocks of
+ * try-catch-finally blocks.
+ * 
+ * @author David &lsquo;Roden&rsquo; &lt;bombe@freenetproject.org&gt;
+ * @version $Id$
+ */
+public class Closer {
+
+       /**
+        * Closes the given output stream.
+        * 
+        * @param outputStream
+        *            The output stream to close
+        */
+       public static void close(OutputStream outputStream) {
+               if (outputStream != null) {
+                       try {
+                               outputStream.close();
+                       } catch (IOException ioe1) {
+                       }
+               }
+       }
+
+       /**
+        * Closes the given input stream.
+        * 
+        * @param inputStream
+        *            The input stream to close
+        */
+       public static void close(InputStream inputStream) {
+               if (inputStream != null) {
+                       try {
+                               inputStream.close();
+                       } catch (IOException ioe1) {
+                       }
+               }
+       }
+
+       /**
+        * Closes the given writer.
+        * 
+        * @param writer
+        *            The writer to close
+        */
+       public static void close(Writer writer) {
+               if (writer != null) {
+                       try {
+                               writer.close();
+                       } catch (IOException ioe1) {
+                       }
+               }
+       }
+
+       /**
+        * Closes the given reader.
+        * 
+        * @param reader
+        *            The reader to close
+        */
+       public static void close(Reader reader) {
+               if (reader != null) {
+                       try {
+                               reader.close();
+                       } catch (IOException ioe1) {
+                       }
+               }
+       }
+
+       /**
+        * Closes the given jar file.
+        * 
+        * @param jarFile
+        *            The jar file to close
+        */
+       public static void close(JarFile jarFile) {
+               if (jarFile != null) {
+                       try {
+                               jarFile.close();
+                       } catch (IOException e) {
+                       }
+               }
+       }
+
+       /**
+        * Closes the given zip file.
+        * 
+        * @param zipFile
+        *            The zip file to close
+        */
+       public static void close(ZipFile zipFile) {
+               if (zipFile != null) {
+                       try {
+                               zipFile.close();
+                       } catch (IOException e) {
+                       }
+               }
+       }
+
+}