67 lines
2.4 KiB
Java
67 lines
2.4 KiB
Java
/* ====================================================================
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==================================================================== */
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package org.apache.poi.ss.usermodel;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.PushbackInputStream;
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import org.apache.poi.POIXMLDocument;
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import org.apache.poi.hssf.usermodel.HSSFWorkbook;
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import org.apache.poi.poifs.filesystem.POIFSFileSystem;
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import org.apache.poi.xssf.usermodel.XSSFWorkbook;
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import org.apache.poi.openxml4j.opc.Package;
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/**
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* Factory for creating the appropriate kind of Workbook
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* (be it HSSFWorkbook or XSSFWorkbook), from the given input
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*/
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public class WorkbookFactory {
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/**
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* Creates an HSSFWorkbook from the given POIFSFileSystem
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*/
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public static Workbook create(POIFSFileSystem fs) throws IOException {
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return new HSSFWorkbook(fs);
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}
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/**
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* Creates an XSSFWorkbook from the given OOXML Package
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*/
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public static Workbook create(Package pkg) throws IOException {
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return new XSSFWorkbook(pkg);
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}
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/**
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* Creates the appropriate HSSFWorkbook / XSSFWorkbook from
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* the given InputStream.
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* Your input stream MUST either support mark/reset, or
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* be wrapped as a {@link PushbackInputStream}!
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*/
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public static Workbook create(InputStream inp) throws Exception {
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// If clearly doesn't do mark/reset, wrap up
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if(! inp.markSupported()) {
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inp = new PushbackInputStream(inp, 8);
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}
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if(POIFSFileSystem.hasPOIFSHeader(inp)) {
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return new HSSFWorkbook(inp);
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}
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if(POIXMLDocument.hasOOXMLHeader(inp)) {
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return new XSSFWorkbook( Package.open(inp) );
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}
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throw new IllegalArgumentException("Your InputStream was neither an OLE2 stream, nor an OOXML stream");
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}
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}
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