1 /* ==================================================================== 2 * The Apache Software License, Version 1.1 3 * 4 * Copyright (c) 2000 The Apache Software Foundation. All rights 5 * reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the 17 * distribution. 18 * 19 * 3. The end-user documentation included with the redistribution, 20 * if any, must include the following acknowledgment: 21 * "This product includes software developed by the 22 * Apache Software Foundation (http://www.apache.org/)." 23 * Alternately, this acknowledgment may appear in the software itself, 24 * if and wherever such third-party acknowledgments normally appear. 25 * 26 * 4. The names "Apache" and "Apache Software Foundation" must 27 * not be used to endorse or promote products derived from this 28 * software without prior written permission. For written 29 * permission, please contact apache@apache.org. 30 * 31 * 5. Products derived from this software may not be called "Apache", 32 * nor may "Apache" appear in their name, without prior written 33 * permission of the Apache Software Foundation. 34 * 35 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 36 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 37 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 38 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 41 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 42 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 43 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 44 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 45 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 46 * SUCH DAMAGE. 47 * ==================================================================== 48 * 49 * This software consists of voluntary contributions made by many 50 * individuals on behalf of the Apache Software Foundation. For more 51 * information on the Apache Software Foundation, please see 52 * <http://www.apache.org/>. 53 */ 54 55 package org.apache.poi.hpsf; 56 57 import java.io.*; 58 59 /** 60 * <p>Factory class to create instances of {@link SummaryInformation}, 61 * {@link DocumentSummaryInformation} and {@link PropertySet}.</p> 62 * 63 * @author Rainer Klute (klute@rainer-klute.de) 64 * @version $Id: PropertySetFactory.java,v 1.3 2002/05/01 09:31:52 klute Exp $ 65 * @since 2002-02-09 66 */ 67 public class PropertySetFactory 68 { 69 70 /** 71 * <p>Creates the most specific {@link PropertySet} from an {@link 72 * InputStream}. This is preferrably a {@link 73 * DocumentSummaryInformation} or a {@link SummaryInformation}. If 74 * the specified {@link InputStream} does not contain a property 75 * set stream, an exception is thrown and the {@link InputStream} 76 * is repositioned at its beginning.</p> 77 * 78 * @param stream Contains the property set stream's data. 79 */ 80 public static PropertySet create(final InputStream stream) 81 throws NoPropertySetStreamException, MarkUnsupportedException, 82 UnexpectedPropertySetTypeException, IOException 83 { 84 final PropertySet ps = new PropertySet(stream); 85 if (ps.isSummaryInformation()) 86 return new SummaryInformation(ps); 87 else if (ps.isDocumentSummaryInformation()) 88 return new DocumentSummaryInformation(ps); 89 else 90 return ps; 91 } 92 93 } 94