initial commit

git-svn-id: svn://svn.jdownloader.org/jdownloader/trunk@32 ebf7c1c2-ba36-0410-9fe8-c592906822b4

jd/update/UnzipUtil.java

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+package jd.update;
+
+import java.io.BufferedOutputStream;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.Enumeration;
+import java.util.logging.Logger;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipFile;
+
+import jd.plugins.Plugin;
+
+/**
+ * Simple utility class that unzips
+ * 
+ * @author Tom
+ */
+public final class UnzipUtil {
+
+   private static Logger logger = Plugin.getLogger();
+
+   /**
+    * Unzips a file to a given location
+    * 
+    * @param file
+    *           the file to unzip
+    * @param unzipLocation
+    *           a directory to unzip the file to
+    */
+   public final static void unzip(File file, String unzipLocation) {
+      ZipFile zipFile;
+
+      try {
+         zipFile = new ZipFile(file);
+
+         Enumeration entries = zipFile.entries();
+         while (entries.hasMoreElements()) {
+            ZipEntry entry = (ZipEntry) entries.nextElement();
+            String newFileName = unzipLocation + File.separatorChar + entry.getName();
+
+            if (entry.isDirectory()) {
+               logger.info("Extracting directory: " + newFileName);
+               (new File(newFileName)).mkdir();
+               continue;
+            }
+
+            logger.info("Extracting file: " + newFileName);
+            (new File(newFileName)).getParentFile().mkdirs();
+            copyInputStream(zipFile.getInputStream(entry), new BufferedOutputStream(
+                  new FileOutputStream(newFileName)));
+         }
+
+         zipFile.close();
+      } catch (Exception e) {
+         throw new RuntimeException(e);
+      }
+   }
+
+   /**
+    * Copies the contents from one stream to another
+    * 
+    * @param in
+    *           the InputStream to copy from
+    * @param out
+    *           the OutputStream to copy to
+    * @throws IOException
+    *            if something goes wrong
+    */
+   private static final void copyInputStream(InputStream in, OutputStream out) throws IOException {
+      byte[] buffer = new byte[1024];
+      int len;
+
+      while ((len = in.read(buffer)) >= 0)
+         out.write(buffer, 0, len);
+
+      in.close();
+      out.close();
+   }
+
+}