| /* |
| * ==================================================================== |
| * 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.poifs.crypt.temp; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| |
| import org.apache.logging.log4j.LogManager; |
| import org.apache.logging.log4j.Logger; |
| import org.apache.poi.openxml4j.util.ZipEntrySource; |
| import org.apache.poi.util.Beta; |
| import org.apache.poi.util.IOUtils; |
| import org.apache.poi.xssf.streaming.SXSSFWorkbook; |
| import org.apache.poi.xssf.streaming.SheetDataWriter; |
| |
| import static org.apache.logging.log4j.util.Unbox.box; |
| |
| @Beta |
| public class SXSSFWorkbookWithCustomZipEntrySource extends SXSSFWorkbook { |
| private static final Logger LOG = LogManager.getLogger(SXSSFWorkbookWithCustomZipEntrySource.class); |
| |
| public SXSSFWorkbookWithCustomZipEntrySource() { |
| super(20); |
| setCompressTempFiles(true); |
| } |
| |
| @Override |
| public void write(OutputStream stream) throws IOException { |
| flushSheets(); |
| EncryptedTempData tempData = new EncryptedTempData(); |
| ZipEntrySource source = null; |
| try { |
| try (OutputStream os = tempData.getOutputStream()) { |
| getXSSFWorkbook().write(os); |
| } |
| // provide ZipEntrySource to poi which decrypts on the fly |
| source = AesZipFileZipEntrySource.createZipEntrySource(tempData.getInputStream()); |
| injectData(source, stream); |
| } finally { |
| tempData.dispose(); |
| IOUtils.closeQuietly(source); |
| } |
| } |
| |
| @Override |
| protected SheetDataWriter createSheetDataWriter() throws IOException { |
| //log values to ensure these values are accessible to subclasses |
| LOG.atInfo().log("isCompressTempFiles: {}", box(isCompressTempFiles())); |
| LOG.atInfo().log("SharedStringSource: {}", getSharedStringSource()); |
| return new SheetDataWriterWithDecorator(); |
| } |
| } |