1 /* 2 * ==================================================================== 3 * The Apache Software License, Version 1.1 4 * 5 * Copyright (c) 2000 The Apache Software Foundation. All rights 6 * reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in 17 * the documentation and/or other materials provided with the 18 * distribution. 19 * 20 * 3. The end-user documentation included with the redistribution, 21 * if any, must include the following acknowledgment: 22 * "This product includes software developed by the 23 * Apache Software Foundation (http://www.apache.org/)." 24 * Alternately, this acknowledgment may appear in the software itself, 25 * if and wherever such third-party acknowledgments normally appear. 26 * 27 * 4. The names "Apache" and "Apache Software Foundation" must 28 * not be used to endorse or promote products derived from this 29 * software without prior written permission. For written 30 * permission, please contact apache@apache.org. 31 * 32 * 5. Products derived from this software may not be called "Apache", 33 * nor may "Apache" appear in their name, without prior written 34 * permission of the Apache Software Foundation. 35 * 36 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 37 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 38 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 39 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 40 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 42 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 43 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 44 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 45 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 46 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 47 * SUCH DAMAGE. 48 * ==================================================================== 49 * 50 * This software consists of voluntary contributions made by many 51 * individuals on behalf of the Apache Software Foundation. For more 52 * information on the Apache Software Foundation, please see 53 * <http://www.apache.org/>. 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 1.6 2003/02/01 13:28:28 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 * @return The created {@link PropertySet}. 80 * @throws NoPropertySetStreamException if the stream does not 81 * contain a property set. 82 * @throws MarkUnsupportedException if the stream does not support 83 * the <code>mark</code> operation. 84 * @throws UnexpectedPropertySetTypeException if the property 85 * set's type is unexpected. 86 * @throws IOException if some I/O problem occurs. 87 */ 88 public static PropertySet create(final InputStream stream) 89 throws NoPropertySetStreamException, MarkUnsupportedException, 90 UnexpectedPropertySetTypeException, IOException 91 { 92 final PropertySet ps = new PropertySet(stream); 93 if (ps.isSummaryInformation()) 94 return new SummaryInformation(ps); 95 else if (ps.isDocumentSummaryInformation()) 96 return new DocumentSummaryInformation(ps); 97 else 98 return ps; 99 } 100 101 } 102