org.apache.poi.ss.usermodel.WorkbookFactory Maven / Gradle / Ivy
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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
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http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.poi.ss.usermodel;
import java.io.IOException;
import java.io.InputStream;
import java.io.PushbackInputStream;
import org.apache.poi.POIXMLDocument;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.openxml4j.opc.OPCPackage;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
/**
* Factory for creating the appropriate kind of Workbook
* (be it HSSFWorkbook or XSSFWorkbook), from the given input
*/
public class WorkbookFactory {
/**
* Creates an HSSFWorkbook from the given POIFSFileSystem
*/
public static Workbook create(POIFSFileSystem fs) throws IOException {
return new HSSFWorkbook(fs);
}
/**
* Creates an XSSFWorkbook from the given OOXML Package
*/
public static Workbook create(OPCPackage pkg) throws IOException {
return new XSSFWorkbook(pkg);
}
/**
* Creates the appropriate HSSFWorkbook / XSSFWorkbook from
* the given InputStream.
* Your input stream MUST either support mark/reset, or
* be wrapped as a {@link PushbackInputStream}!
*/
public static Workbook create(InputStream inp) throws IOException, InvalidFormatException {
// If clearly doesn't do mark/reset, wrap up
if(! inp.markSupported()) {
inp = new PushbackInputStream(inp, 8);
}
if(POIFSFileSystem.hasPOIFSHeader(inp)) {
return new HSSFWorkbook(inp);
}
if(POIXMLDocument.hasOOXMLHeader(inp)) {
return new XSSFWorkbook(OPCPackage.open(inp));
}
throw new IllegalArgumentException("Your InputStream was neither an OLE2 stream, nor an OOXML stream");
}
}