001    /**
002     * ========================================
003     * JFreeReport : a free Java report library
004     * ========================================
005     *
006     * Project Info:  http://reporting.pentaho.org/
007     *
008     * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors.
009     *
010     * This library is free software; you can redistribute it and/or modify it under the terms
011     * of the GNU Lesser General Public License as published by the Free Software Foundation;
012     * either version 2.1 of the License, or (at your option) any later version.
013     *
014     * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
015     * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
016     * See the GNU Lesser General Public License for more details.
017     *
018     * You should have received a copy of the GNU Lesser General Public License along with this
019     * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
020     * Boston, MA 02111-1307, USA.
021     *
022     * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
023     * in the United States and other countries.]
024     *
025     * ------------
026     * $Id: StyleSheetReadHandler.java 3525 2007-10-16 11:43:48Z tmorgner $
027     * ------------
028     * (C) Copyright 2000-2005, by Object Refinery Limited.
029     * (C) Copyright 2005-2007, by Pentaho Corporation.
030     */
031    package org.jfree.report.modules.factories.report.flow;
032    
033    import org.jfree.layouting.input.style.StyleSheet;
034    import org.jfree.resourceloader.Resource;
035    import org.jfree.resourceloader.ResourceCreationException;
036    import org.jfree.resourceloader.ResourceKey;
037    import org.jfree.resourceloader.ResourceKeyCreationException;
038    import org.jfree.resourceloader.ResourceLoadingException;
039    import org.jfree.resourceloader.ResourceManager;
040    import org.jfree.resourceloader.ResourceException;
041    import org.jfree.util.Log;
042    import org.jfree.xmlns.parser.StringReadHandler;
043    import org.jfree.xmlns.parser.ParseException;
044    import org.xml.sax.Attributes;
045    import org.xml.sax.SAXException;
046    
047    /**
048     * Creation-Date: 12.04.2006, 14:53:29
049     *
050     * @author Thomas Morgner
051     */
052    public class StyleSheetReadHandler extends StringReadHandler
053    {
054      private StyleSheet styleSheet;
055    
056      public StyleSheetReadHandler()
057      {
058      }
059    
060      /**
061       * Starts parsing.
062       *
063       * @param attrs the attributes.
064       * @throws SAXException if there is a parsing error.
065       */
066      protected void startParsing(final Attributes attrs) throws SAXException
067      {
068        super.startParsing(attrs);
069        final String href = attrs.getValue(getUri(), "href");
070        if (href != null)
071        {
072          final ResourceKey key = getRootHandler().getSource();
073          final ResourceManager manager = getRootHandler().getResourceManager();
074          try
075          {
076            final ResourceKey derivedKey = manager.deriveKey(key, href);
077            final Resource resource = manager.create(derivedKey, null,
078                    StyleSheet.class);
079            getRootHandler().getDependencyCollector().add(resource);
080            styleSheet = (StyleSheet) resource.getResource();
081          }
082          catch (ResourceKeyCreationException e)
083          {
084            throw new ParseException
085                ("Unable to derive key for " + key + " and " + href, getLocator());
086          }
087          catch (ResourceCreationException e)
088          {
089            Log.warn("Unable to parse resource for " + key + " and " + href);
090          }
091          catch (ResourceLoadingException e)
092          {
093            Log.warn ("Unable to load resource data for " + key + " and " + href);
094          }
095          catch (ResourceException e)
096          {
097            Log.warn ("Unable to load resource for " + key + " and " + href);
098          }
099        }
100      }
101    
102      /**
103       * Done parsing.
104       *
105       * @throws SAXException       if there is a parsing error.
106       */
107      protected void doneParsing() throws SAXException
108      {
109        super.doneParsing();
110        if (this.styleSheet != null)
111        {
112          return;
113        }
114    
115        final String styleText = getResult();
116        if (styleText.trim().length() == 0)
117        {
118          return;
119        }
120        try
121        {
122          final byte[] bytes = styleText.getBytes("UTF-8");
123    
124          final ResourceKey baseKey = getRootHandler().getSource();
125          final ResourceManager resourceManager = getRootHandler().getResourceManager();
126          final ResourceKey rawKey = resourceManager.createKey(bytes);
127    
128          final Resource resource = resourceManager.create
129                  (rawKey, baseKey, StyleSheet.class);
130          this.styleSheet = (StyleSheet) resource.getResource();
131        }
132        catch (Exception e)
133        {
134          e.printStackTrace();
135        }
136      }
137    
138      /**
139       * Returns the object for this element.
140       *
141       * @return the object.
142       */
143      public Object getObject()
144      {
145        return styleSheet;
146      }
147    
148      public StyleSheet getStyleSheet()
149      {
150        return styleSheet;
151      }
152    }