Utility to test that POI produces readable output after re-saving xls files

git-svn-id: https://svn.apache.org/repos/asf/poi/branches/gsoc2012@1351998 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/src/java/org/apache/poi/hssf/dev/ReSave.java b/src/java/org/apache/poi/hssf/dev/ReSave.java
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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ *    contributor license agreements.  See the NOTICE file distributed with
+ *    this work for additional information regarding copyright ownership.
+ *    The ASF licenses this file to You 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 org.apache.poi.hssf.dev;
+
+import org.apache.poi.hssf.usermodel.HSSFPatriarch;
+import org.apache.poi.hssf.usermodel.HSSFShape;
+import org.apache.poi.hssf.usermodel.HSSFSheet;
+import org.apache.poi.hssf.usermodel.HSSFWorkbook;
+
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+
+/**
+ *  Utility to test that POI produces readable output
+ *  after re-saving xls files.
+ *
+ *  Usage: ReSave [-dg] input.xls
+ *    -dg    initialize drawings, causes to re-build escher aggregates in all sheets
+ */
+public class ReSave {
+    public static void main(String[] args) throws Exception {
+        boolean initDrawing = false;
+        for(String arg : args) {
+            if(arg.equals("-dg")) initDrawing = true;
+            else {
+                System.out.print("reading " + arg + "...");
+                FileInputStream is = new FileInputStream(arg);
+                HSSFWorkbook wb = new HSSFWorkbook(is);
+                is.close();
+                System.out.println("done");
+
+                for(int i = 0; i < wb.getNumberOfSheets(); i++){
+                    HSSFSheet sheet = wb.getSheetAt(i);
+                    if(initDrawing) {
+                        HSSFPatriarch dg = sheet.getDrawingPatriarch();
+                    }
+                }
+
+                String outputFile = arg.replace(".xls", "-saved.xls");
+                System.out.print("saving to " + outputFile + "...");
+                FileOutputStream out = new FileOutputStream(outputFile);
+                wb.write(out);
+                out.close();
+                System.out.println("done");
+            }
+        }
+    }
+}