Source for org.jfree.report.modules.factories.report.flow.AttributeExpressionReadHandler

   1: /**
   2:  * ========================================
   3:  * JFreeReport : a free Java report library
   4:  * ========================================
   5:  *
   6:  * Project Info:  http://reporting.pentaho.org/
   7:  *
   8:  * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors.
   9:  *
  10:  * This library is free software; you can redistribute it and/or modify it under the terms
  11:  * of the GNU Lesser General Public License as published by the Free Software Foundation;
  12:  * either version 2.1 of the License, or (at your option) any later version.
  13:  *
  14:  * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
  15:  * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  16:  * See the GNU Lesser General Public License for more details.
  17:  *
  18:  * You should have received a copy of the GNU Lesser General Public License along with this
  19:  * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  20:  * Boston, MA 02111-1307, USA.
  21:  *
  22:  * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
  23:  * in the United States and other countries.]
  24:  *
  25:  * ------------
  26:  * $Id: AttributeExpressionReadHandler.java 3525 2007-10-16 11:43:48Z tmorgner $
  27:  * ------------
  28:  * (C) Copyright 2000-2005, by Object Refinery Limited.
  29:  * (C) Copyright 2005-2007, by Pentaho Corporation.
  30:  */
  31: package org.jfree.report.modules.factories.report.flow;
  32: 
  33: import org.jfree.xmlns.parser.ParseException;
  34: import org.jfree.xmlns.parser.StringReadHandler;
  35: import org.jfree.xmlns.parser.XmlReadHandler;
  36: import org.xml.sax.Attributes;
  37: import org.xml.sax.SAXException;
  38: 
  39: /**
  40:  * Creation-Date: 09.04.2006, 13:40:08
  41:  *
  42:  * @author Thomas Morgner
  43:  */
  44: public class AttributeExpressionReadHandler
  45:         extends AbstractExpressionReadHandler
  46: {
  47:   private StringReadHandler nameReadHandler;
  48:   private StringReadHandler namespaceUriReadHandler;
  49:   private String attributeName;
  50:   private String namespace;
  51: 
  52:   public AttributeExpressionReadHandler()
  53:   {
  54:   }
  55: 
  56:   /**
  57:    * Returns the handler for a child element.
  58:    *
  59:    * @param tagName the tag name.
  60:    * @param atts    the attributes.
  61:    * @return the handler or null, if the tagname is invalid.
  62:    * @throws SAXException       if there is a parsing error.
  63:    */
  64:   protected XmlReadHandler getHandlerForChild(final String uri,
  65:                                               final String tagName,
  66:                                               final Attributes atts)
  67:           throws SAXException
  68:   {
  69:     if (isSameNamespace(uri) == false)
  70:     {
  71:       return null;
  72:     }
  73:     if ("attribute-name".equals(tagName))
  74:     {
  75:       nameReadHandler = new StringReadHandler();
  76:       return nameReadHandler;
  77:     }
  78:     if ("attribute-namespace-uri".equals(tagName))
  79:     {
  80:       namespaceUriReadHandler = new StringReadHandler();
  81:       return namespaceUriReadHandler;
  82:     }
  83:     return super.getHandlerForChild(uri, tagName, atts);
  84:   }
  85: 
  86:   /**
  87:    * Done parsing.
  88:    *
  89:    * @throws SAXException       if there is a parsing error.
  90:    */
  91:   protected void doneParsing() throws SAXException
  92:   {
  93:     super.doneParsing();
  94:     if (nameReadHandler == null)
  95:     {
  96:       throw new ParseException
  97:           ("Required element 'attribute-name' is missing.", getLocator());
  98:     }
  99: 
 100:     attributeName = nameReadHandler.getResult();
 101: 
 102:     if (namespaceUriReadHandler != null)
 103:     {
 104:       namespace = namespaceUriReadHandler.getResult();
 105:     }
 106:     if (namespace == null)
 107:     {
 108:       namespace = getNamespace();
 109:     }
 110: 
 111:   }
 112: 
 113:   public String getNamespace()
 114:   {
 115:     return namespace;
 116:   }
 117: 
 118:   public String getAttributeName()
 119:   {
 120:     return attributeName;
 121:   }
 122: }