utility to dump POIFS into filesystem

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@690259 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/src/java/org/apache/poi/poifs/dev/POIFSDump.java b/src/java/org/apache/poi/poifs/dev/POIFSDump.java
new file mode 100755 (executable)
index 0000000..5028bab
--- /dev/null
+++ b/src/java/org/apache/poi/poifs/dev/POIFSDump.java
@@ -0,0 +1,74 @@
+/* ====================================================================\r
+   Licensed to the Apache Software Foundation (ASF) under one or more\r
+   contributor license agreements.  See the NOTICE file distributed with\r
+   this work for additional information regarding copyright ownership.\r
+   The ASF licenses this file to You under the Apache License, Version 2.0\r
+   (the "License"); you may not use this file except in compliance with\r
+   the License.  You may obtain a copy of the License at\r
+\r
+       http://www.apache.org/licenses/LICENSE-2.0\r
+\r
+   Unless required by applicable law or agreed to in writing, software\r
+   distributed under the License is distributed on an "AS IS" BASIS,\r
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
+   See the License for the specific language governing permissions and\r
+   limitations under the License.\r
+==================================================================== */\r
+package org.apache.poi.poifs.dev;\r
+\r
+import org.apache.poi.poifs.filesystem.*;\r
+\r
+import java.io.FileInputStream;\r
+import java.io.File;\r
+import java.io.IOException;\r
+import java.io.FileOutputStream;\r
+import java.util.Iterator;\r
+\r
+/**\r
+ *\r
+ * Dump internal structure of a OLE2 file into file system\r
+ *\r
+ * @author Yegor Kozlov\r
+ */\r
+public class POIFSDump {\r
+\r
+    public static void main(String[] args) throws Exception {\r
+        for (int i = 0; i < args.length; i++) {\r
+            System.out.println("Dumping " + args[i]);\r
+            FileInputStream is = new FileInputStream(args[i]);\r
+            POIFSFileSystem fs = new POIFSFileSystem(is);\r
+            is.close();\r
+\r
+            DirectoryEntry root = fs.getRoot();\r
+            File file = new File(root.getName());\r
+            file.mkdir();\r
+\r
+            dump(root, file);\r
+        }\r
+   }\r
+\r
+\r
+    public static void dump(DirectoryEntry root, File parent) throws IOException {\r
+        for(Iterator it = root.getEntries(); it.hasNext();){\r
+            Entry entry = (Entry)it.next();\r
+            if(entry instanceof DocumentNode){\r
+                DocumentNode node = (DocumentNode)entry;\r
+                DocumentInputStream is = new DocumentInputStream(node);\r
+                byte[] bytes = new byte[node.getSize()];\r
+                is.read(bytes);\r
+                is.close();\r
+\r
+                FileOutputStream out = new FileOutputStream(new File(parent, node.getName().trim()));\r
+                out.write(bytes);\r
+                out.close();\r
+            } else if (entry instanceof DirectoryEntry){\r
+                DirectoryEntry dir = (DirectoryEntry)entry;\r
+                File file = new File(parent, entry.getName());\r
+                file.mkdir();\r
+                dump(dir, file);\r
+            } else {\r
+                System.err.println("Skipping unsupported POIFS entry: " + entry);\r
+            }\r
+        }\r
+    }\r
+}\r