117         TimeZone tz = (props.getBoolean(Utils.PACK_DEFAULT_TIMEZONE))
 118                       ? null
 119                       : TimeZone.getDefault();
 120 
 121         try {
 122             Utils.currentInstance.set(this);
 123             if (tz != null) TimeZone.setDefault(TimeZone.getTimeZone("UTC"));
 124             final int verbose = props.getInteger(Utils.DEBUG_VERBOSE);
 125             BufferedInputStream in0 = new BufferedInputStream(in);
 126             if (Utils.isJarMagic(Utils.readMagic(in0))) {
 127                 if (verbose > 0)
 128                     Utils.log.info("Copying unpacked JAR file...");
 129                 Utils.copyJarFile(new JarInputStream(in0), out);
 130             } else if (props.getBoolean(Utils.DEBUG_DISABLE_NATIVE)) {
 131                 (new DoUnpack()).run(in0, out);
 132                 in0.close();
 133                 Utils.markJarFile(out);
 134             } else {
 135                 try {
 136                     (new NativeUnpack(this)).run(in0, out);
 137                 } catch (UnsatisfiedLinkError ule) {
 138                     // failover to java implementation
 139                     (new DoUnpack()).run(in0, out);
 140                 }
 141                 in0.close();
 142                 Utils.markJarFile(out);
 143             }
 144         } finally {
 145             _nunp = null;
 146             Utils.currentInstance.set(null);
 147             if (tz != null) TimeZone.setDefault(tz);
 148         }
 149     }
 150 
 151     /**
 152      * Takes an input File containing the pack file, and generates a JarOutputStream.
 153      * <p>
 154      * Does not close its output.  (The output can accumulate more elements.)
 155      * @param in a File.
 156      * @param out a JarOutputStream.
 157      * @exception IOException if an error is encountered.

 117         TimeZone tz = (props.getBoolean(Utils.PACK_DEFAULT_TIMEZONE))
 118                       ? null
 119                       : TimeZone.getDefault();
 120 
 121         try {
 122             Utils.currentInstance.set(this);
 123             if (tz != null) TimeZone.setDefault(TimeZone.getTimeZone("UTC"));
 124             final int verbose = props.getInteger(Utils.DEBUG_VERBOSE);
 125             BufferedInputStream in0 = new BufferedInputStream(in);
 126             if (Utils.isJarMagic(Utils.readMagic(in0))) {
 127                 if (verbose > 0)
 128                     Utils.log.info("Copying unpacked JAR file...");
 129                 Utils.copyJarFile(new JarInputStream(in0), out);
 130             } else if (props.getBoolean(Utils.DEBUG_DISABLE_NATIVE)) {
 131                 (new DoUnpack()).run(in0, out);
 132                 in0.close();
 133                 Utils.markJarFile(out);
 134             } else {
 135                 try {
 136                     (new NativeUnpack(this)).run(in0, out);
 137                 } catch (UnsatisfiedLinkError | NoClassDefFoundError ex) {
 138                     // failover to java implementation
 139                     (new DoUnpack()).run(in0, out);
 140                 }
 141                 in0.close();
 142                 Utils.markJarFile(out);
 143             }
 144         } finally {
 145             _nunp = null;
 146             Utils.currentInstance.set(null);
 147             if (tz != null) TimeZone.setDefault(tz);
 148         }
 149     }
 150 
 151     /**
 152      * Takes an input File containing the pack file, and generates a JarOutputStream.
 153      * <p>
 154      * Does not close its output.  (The output can accumulate more elements.)
 155      * @param in a File.
 156      * @param out a JarOutputStream.
 157      * @exception IOException if an error is encountered.