org.apache.poi.xssf.streaming.GZIPSheetDataWriter 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.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.OutputStream;
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");
    }

    @Override
    protected InputStream decorateInputStream(FileInputStream fis) throws IOException {
        return new GZIPInputStream(fis);
    }

    @Override
    protected OutputStream decorateOutputStream(FileOutputStream fos) throws IOException {
        return new GZIPOutputStream(fos);
    }

}