SAXModifyContentHandler xref

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    1   /*
    2    * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
    3    *
    4    * This software is open source.
    5    * See the bottom of this file for the licence.
    6    */
    7
    8   package org.dom4j.io;
    9
    10  import java.io.IOException;
    11
    12  import org.dom4j.DocumentFactory;
    13  import org.dom4j.Element;
    14  import org.dom4j.ElementHandler;
    15
    16  import org.xml.sax.Attributes;
    17  import org.xml.sax.Locator;
    18  import org.xml.sax.SAXException;
    19
    20  /***
    21   * This extension of the SAXContentHandler writes SAX events immediately to the
    22   * provided XMLWriter, unless some {@link org.dom4.ElementHandler}is still
    23   * handling the current Element.
    24   *
    25   * @author Wonne Keysers (Realsoftware.be)
    26   *
    27   * @see org.dom4j.io.SAXContentHandler
    28   */
    29  class SAXModifyContentHandler extends SAXContentHandler {
    30      private XMLWriter xmlWriter;
    31
    32      public SAXModifyContentHandler() {
    33      }
    34
    35      public SAXModifyContentHandler(DocumentFactory documentFactory) {
    36          super(documentFactory);
    37      }
    38
    39      public SAXModifyContentHandler(DocumentFactory documentFactory,
    40              ElementHandler elementHandler) {
    41          super(documentFactory, elementHandler);
    42      }
    43
    44      public SAXModifyContentHandler(DocumentFactory documentFactory,
    45              ElementHandler elementHandler, ElementStack elementStack) {
    46          super(documentFactory, elementHandler, elementStack);
    47      }
    48
    49      public void setXMLWriter(XMLWriter writer) {
    50          this.xmlWriter = writer;
    51      }
    52
    53      public void startCDATA() throws SAXException {
    54          super.startCDATA();
    55
    56          if (!activeHandlers() && (xmlWriter != null)) {
    57              xmlWriter.startCDATA();
    58          }
    59      }
    60
    61      public void startDTD(String name, String publicId, String systemId)
    62              throws SAXException {
    63          super.startDTD(name, publicId, systemId);
    64
    65          if (xmlWriter != null) {
    66              xmlWriter.startDTD(name, publicId, systemId);
    67          }
    68      }
    69
    70      public void endDTD() throws org.xml.sax.SAXException {
    71          super.endDTD();
    72
    73          if (xmlWriter != null) {
    74              xmlWriter.endDTD();
    75          }
    76      }
    77
    78      public void comment(char[] characters, int parm2, int parm3)
    79              throws SAXException {
    80          super.comment(characters, parm2, parm3);
    81
    82          if (!activeHandlers() && (xmlWriter != null)) {
    83              xmlWriter.comment(characters, parm2, parm3);
    84          }
    85      }
    86
    87      public void startEntity(String name) throws SAXException {
    88          super.startEntity(name);
    89
    90          if (xmlWriter != null) {
    91              xmlWriter.startEntity(name);
    92          }
    93      }
    94
    95      public void endCDATA() throws org.xml.sax.SAXException {
    96          super.endCDATA();
    97
    98          if (!activeHandlers() && (xmlWriter != null)) {
    99              xmlWriter.endCDATA();
    100         }
    101     }
    102
    103     public void endEntity(String name) throws SAXException {
    104         super.endEntity(name);
    105
    106         if (xmlWriter != null) {
    107             xmlWriter.endEntity(name);
    108         }
    109     }
    110
    111     public void unparsedEntityDecl(String name, String publicId,
    112             String systemId, String notation) throws SAXException {
    113         super.unparsedEntityDecl(name, publicId, systemId, notation);
    114
    115         if (!activeHandlers() && (xmlWriter != null)) {
    116             xmlWriter.unparsedEntityDecl(name, publicId, systemId, notation);
    117         }
    118     }
    119
    120     public void notationDecl(String name, String publicId, String systemId)
    121             throws SAXException {
    122         super.notationDecl(name, publicId, systemId);
    123
    124         if (xmlWriter != null) {
    125             xmlWriter.notationDecl(name, publicId, systemId);
    126         }
    127     }
    128
    129     public void startElement(String uri, String localName, String qName,
    130             Attributes atts) throws SAXException {
    131         super.startElement(uri, localName, qName, atts);
    132
    133         if (!activeHandlers() && (xmlWriter != null)) {
    134             xmlWriter.startElement(uri, localName, qName, atts);
    135         }
    136     }
    137
    138     public void startDocument() throws SAXException {
    139         super.startDocument();
    140
    141         if (xmlWriter != null) {
    142             xmlWriter.startDocument();
    143         }
    144     }
    145
    146     public void ignorableWhitespace(char[] parm1, int parm2, int parm3)
    147             throws SAXException {
    148         super.ignorableWhitespace(parm1, parm2, parm3);
    149
    150         if (!activeHandlers() && (xmlWriter != null)) {
    151             xmlWriter.ignorableWhitespace(parm1, parm2, parm3);
    152         }
    153     }
    154
    155     public void processingInstruction(String target, String data)
    156             throws SAXException {
    157         super.processingInstruction(target, data);
    158
    159         if (!activeHandlers() && (xmlWriter != null)) {
    160             xmlWriter.processingInstruction(target, data);
    161         }
    162     }
    163
    164     public void setDocumentLocator(Locator locator) {
    165         super.setDocumentLocator(locator);
    166
    167         if (xmlWriter != null) {
    168             xmlWriter.setDocumentLocator(locator);
    169         }
    170     }
    171
    172     public void skippedEntity(String name) throws SAXException {
    173         super.skippedEntity(name);
    174
    175         if (!activeHandlers() && (xmlWriter != null)) {
    176             xmlWriter.skippedEntity(name);
    177         }
    178     }
    179
    180     public void endDocument() throws SAXException {
    181         super.endDocument();
    182
    183         if (xmlWriter != null) {
    184             xmlWriter.endDocument();
    185         }
    186     }
    187
    188     public void startPrefixMapping(String prefix, String uri)
    189             throws SAXException {
    190         super.startPrefixMapping(prefix, uri);
    191
    192         if (xmlWriter != null) {
    193             xmlWriter.startPrefixMapping(prefix, uri);
    194         }
    195     }
    196
    197     public void endElement(String uri, String localName, String qName)
    198             throws SAXException {
    199         ElementHandler currentHandler = getElementStack().getDispatchHandler()
    200                 .getHandler(getElementStack().getPath());
    201
    202         super.endElement(uri, localName, qName);
    203
    204         if (!activeHandlers()) {
    205             if (xmlWriter != null) {
    206                 if (currentHandler == null) {
    207                     xmlWriter.endElement(uri, localName, qName);
    208                 } else if (currentHandler instanceof SAXModifyElementHandler) {
    209                     SAXModifyElementHandler modifyHandler
    210                             = (SAXModifyElementHandler) currentHandler;
    211                     Element modifiedElement = modifyHandler
    212                             .getModifiedElement();
    213
    214                     try {
    215                         xmlWriter.write(modifiedElement);
    216                     } catch (IOException ex) {
    217                         throw new SAXModifyException(ex);
    218                     }
    219                 }
    220             }
    221         }
    222     }
    223
    224     public void endPrefixMapping(String prefix) throws SAXException {
    225         super.endPrefixMapping(prefix);
    226
    227         if (xmlWriter != null) {
    228             xmlWriter.endPrefixMapping(prefix);
    229         }
    230     }
    231
    232     public void characters(char[] parm1, int parm2, int parm3)
    233             throws SAXException {
    234         super.characters(parm1, parm2, parm3);
    235
    236         if (!activeHandlers() && (xmlWriter != null)) {
    237             xmlWriter.characters(parm1, parm2, parm3);
    238         }
    239     }
    240
    241     protected XMLWriter getXMLWriter() {
    242         return this.xmlWriter;
    243     }
    244
    245     private boolean activeHandlers() {
    246         DispatchHandler handler = getElementStack().getDispatchHandler();
    247
    248         return handler.getActiveHandlerCount() > 0;
    249     }
    250 }
    251
    252 /*
    253  * Redistribution and use of this software and associated documentation
    254  * ("Software"), with or without modification, are permitted provided that the
    255  * following conditions are met:
    256  *
    257  * 1. Redistributions of source code must retain copyright statements and
    258  * notices. Redistributions must also contain a copy of this document.
    259  *
    260  * 2. Redistributions in binary form must reproduce the above copyright notice,
    261  * this list of conditions and the following disclaimer in the documentation
    262  * and/or other materials provided with the distribution.
    263  *
    264  * 3. The name "DOM4J" must not be used to endorse or promote products derived
    265  * from this Software without prior written permission of MetaStuff, Ltd. For
    266  * written permission, please contact dom4j-info@metastuff.com.
    267  *
    268  * 4. Products derived from this Software may not be called "DOM4J" nor may
    269  * "DOM4J" appear in their names without prior written permission of MetaStuff,
    270  * Ltd. DOM4J is a registered trademark of MetaStuff, Ltd.
    271  *
    272  * 5. Due credit should be given to the DOM4J Project - http://www.dom4j.org
    273  *
    274  * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS ``AS IS'' AND
    275  * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    276  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    277  * ARE DISCLAIMED. IN NO EVENT SHALL METASTUFF, LTD. OR ITS CONTRIBUTORS BE
    278  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    279  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    280  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    281  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    282  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    283  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    284  * POSSIBILITY OF SUCH DAMAGE.
    285  *
    286  * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
    287  */