org.apache.poi.hssf.dev.ReSave Maven / Gradle / Ivy

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The Apache Commons Codec package contains simple encoder and decoders for various formats such as Base64 and Hexadecimal. In addition to these widely used encoders and decoders, the codec package also maintains a collection of phonetic encoding utilities.

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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 java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.OutputStream;

import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;

/**
 *  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
 *    -bos   only write to memory instead of a file
 */
public class ReSave {
    public static void main(String[] args) throws Exception {
        boolean initDrawing = false;
        boolean saveToMemory = false;
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        for(String filename : args) {
            if(filename.equals("-dg")) {
                initDrawing = true;
            } else if(filename.equals("-bos")) {
                saveToMemory = true;
            } else {
                System.out.print("reading " + filename + "...");
                FileInputStream is = new FileInputStream(filename);
                HSSFWorkbook wb = new HSSFWorkbook(is);
                try {
                    System.out.println("done");
    
                    for(int i = 0; i < wb.getNumberOfSheets(); i++){
                        HSSFSheet sheet = wb.getSheetAt(i);
                        if(initDrawing) {
                            /*HSSFPatriarch dg =*/ sheet.getDrawingPatriarch();
                        }
                    }

                    OutputStream os;
                    if (saveToMemory) {
                        bos.reset();
                        os = bos;
                    } else {
                        String outputFile = filename.replace(".xls", "-saved.xls");
                        System.out.print("saving to " + outputFile + "...");
                        os = new FileOutputStream(outputFile);
                    }
                    
                    try {
                        wb.write(os);
                    } finally {
                        os.close();
                    }
                    System.out.println("done");
                } finally {
                    wb.close();
                    is.close();
                }
            }
        }
    }
}