1 files changed, 71 insertions, 0 deletions
diff --git a/src/main/com/tonicsystems/jarjar/util/StandaloneJarProcessor.java b/src/main/com/tonicsystems/jarjar/util/StandaloneJarProcessor.java
new file mode 100644
index 0000000..70b169b
--- /dev/null
+++ b/src/main/com/tonicsystems/jarjar/util/StandaloneJarProcessor.java
@@ -0,0 +1,71 @@
+/**
+ * Copyright 2007 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.tonicsystems.jarjar.util;
+
+import java.util.jar.JarEntry;
+import java.util.jar.JarFile;
+import java.util.jar.JarOutputStream;
+import java.util.Enumeration;
+import java.io.*;
+import java.util.*;
+
+public class StandaloneJarProcessor
+{
+    public static void run(File from, File to, JarProcessor proc) throws IOException {
+        byte[] buf = new byte[0x2000];
+
+        JarFile in = new JarFile(from);
+        final File tmpTo = File.createTempFile("jarjar", ".jar");
+        JarOutputStream out = new JarOutputStream(new FileOutputStream(tmpTo));
+        Set<String> entries = new HashSet<String>();
+        try {
+            EntryStruct struct = new EntryStruct();
+            Enumeration<JarEntry> e = in.entries();
+            while (e.hasMoreElements()) {
+                JarEntry entry = e.nextElement();
+                struct.name = entry.getName();
+                struct.time = entry.getTime();
+                ByteArrayOutputStream baos = new ByteArrayOutputStream();
+                IoUtil.pipe(in.getInputStream(entry), baos, buf);
+                struct.data = baos.toByteArray();
+                if (proc.process(struct)) {
+                    if (entries.add(struct.name)) {
+                        entry = new JarEntry(struct.name);
+                        entry.setTime(struct.time);
+                        entry.setCompressedSize(-1);
+                        out.putNextEntry(entry);
+                        out.write(struct.data);
+                    } else if (struct.name.endsWith("/")) {
+                        // TODO(chrisn): log
+                    } else {
+                        throw new IllegalArgumentException("Duplicate jar entries: " + struct.name);
+                    }
+                }
+            }
+
+        }
+        finally {
+            in.close();
+            out.close();
+        }
+
+         // delete the empty directories
+        IoUtil.copyZipWithoutEmptyDirectories(tmpTo, to);
+        tmpTo.delete();
+
+    }
+}