org.apache.poi.xssf.streaming.GZIPSheetDataWriter Maven / Gradle / Ivy
/*
* ====================================================================
* 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.xssf.streaming;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;
import org.apache.poi.util.TempFile;
import org.apache.poi.xssf.model.SharedStringsTable;
/**
* Sheet writer that supports gzip compression of the temp files.
*/
public class GZIPSheetDataWriter extends SheetDataWriter {
public GZIPSheetDataWriter() throws IOException {
super();
}
/**
* @param sharedStringsTable the shared strings table, or null if inline text is used
*/
public GZIPSheetDataWriter(SharedStringsTable sharedStringsTable) throws IOException {
super(sharedStringsTable);
}
/**
* @return temp file to write sheet data
*/
@Override
public File createTempFile() throws IOException {
return TempFile.createTempFile("poi-sxssf-sheet-xml", ".gz");
}
/**
* @return a wrapped instance of GZIPOutputStream
*/
@Override
public Writer createWriter(File fd)throws IOException {
return new OutputStreamWriter(new GZIPOutputStream(new FileOutputStream(fd)), "UTF-8");
}
/**
* @return a GZIPInputStream stream to read the compressed temp file
*/
@Override
public InputStream getWorksheetXMLInputStream() throws IOException {
File fd = getTempFile();
return new GZIPInputStream(new FileInputStream(fd));
}
}