001/* 002 * Copyright 2001 (C) MetaStuff, Ltd. All Rights Reserved. 003 * 004 * This software is open source. 005 * See the bottom of this file for the licence. 006 * 007 * $Id: DocumentInputSource.java,v 1.2 2001/04/12 10:54:45 jstrachan Exp $ 008 */ 009 010package org.dom4j.io; 011 012import java.io.IOException; 013import java.io.Reader; 014import java.io.StringReader; 015import java.io.StringWriter; 016 017import org.dom4j.Document; 018 019import org.xml.sax.InputSource; 020 021 022/** <p><code>DocumentInputSource</code> implements a SAX {@link InputSource} 023 * for a {@link Document}.</p> 024 * 025 * @author <a href="mailto:james.strachan@metastuff.com">James Strachan</a> 026 * @version $Revision: 1.2 $ 027 */ 028class DocumentInputSource extends InputSource { 029 030 /** The document source */ 031 private Document document; 032 033 034 public DocumentInputSource() { 035 } 036 037 public DocumentInputSource(Document document) { 038 this.document = document; 039 setSystemId( document.getName() ); 040 } 041 042 043 // Properties 044 //------------------------------------------------------------------------- 045 046 /** @return the document which is being used as the SAX {@link InputSource} 047 */ 048 public Document getDocument() { 049 return document; 050 } 051 052 /** Sets the document used as the SAX {@link InputSource} 053 */ 054 public void setDocument(Document document) { 055 this.document = document; 056 setSystemId( document.getName() ); 057 } 058 059 060 // Overloaded methods 061 //------------------------------------------------------------------------- 062 063 /** This method is not supported as this source is always a 064 * {@link Document} instance. 065 * 066 * @throws UnsupportedOperationException as this method is unsupported 067 */ 068 public void setCharacterStream(Reader characterStream) 069 throws UnsupportedOperationException { 070 throw new UnsupportedOperationException(); 071 } 072 073 /** Note this method is quite inefficent, it turns the in memory XML tree 074 * object model into a single block of text which can then be read by 075 * other XML parsers. Should only be used with care. 076 */ 077 public Reader getCharacterStream() { 078 try { 079 StringWriter out = new StringWriter(); 080 XMLWriter writer = new XMLWriter( out ); 081 writer.write( document ); 082 writer.flush(); 083 return new StringReader( out.toString() ); 084 } 085 catch (final IOException e) { 086 // this should never really happen 087 // but for completeness we'll return a Reader 088 // with the embedded exception inside it 089 return new Reader() { 090 public int read(char ch[], int offset, int length) 091 throws IOException { 092 throw e; 093 } 094 public void close() throws IOException { 095 } 096 }; 097 } 098 } 099} 100 101 102 103 104 105 106 107/* 108 * Redistribution and use of this software and associated documentation 109 * ("Software"), with or without modification, are permitted provided 110 * that the following conditions are met: 111 * 112 * 1. Redistributions of source code must retain copyright 113 * statements and notices. Redistributions must also contain a 114 * copy of this document. 115 * 116 * 2. Redistributions in binary form must reproduce the 117 * above copyright notice, this list of conditions and the 118 * following disclaimer in the documentation and/or other 119 * materials provided with the distribution. 120 * 121 * 3. The name "DOM4J" must not be used to endorse or promote 122 * products derived from this Software without prior written 123 * permission of MetaStuff, Ltd. For written permission, 124 * please contact dom4j-info@metastuff.com. 125 * 126 * 4. Products derived from this Software may not be called "DOM4J" 127 * nor may "DOM4J" appear in their names without prior written 128 * permission of MetaStuff, Ltd. DOM4J is a registered 129 * trademark of MetaStuff, Ltd. 130 * 131 * 5. Due credit should be given to the DOM4J Project 132 * (http://dom4j.org/). 133 * 134 * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS 135 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT 136 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 137 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 138 * METASTUFF, LTD. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 139 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 140 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 141 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 142 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 143 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 144 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 145 * OF THE POSSIBILITY OF SUCH DAMAGE. 146 * 147 * Copyright 2001 (C) MetaStuff, Ltd. All Rights Reserved. 148 * 149 * $Id: DocumentInputSource.java,v 1.2 2001/04/12 10:54:45 jstrachan Exp $ 150 */