/*!
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* Copyright (c) 2002-2013 Pentaho Corporation.. All rights reserved.
*/
package org.pentaho.reporting.libraries.css.parser;
import org.pentaho.reporting.libraries.css.dom.DocumentContext;
import org.pentaho.reporting.libraries.css.model.CSSDeclarationRule;
import org.pentaho.reporting.libraries.css.model.CSSStyleRule;
import org.pentaho.reporting.libraries.css.model.StyleKeyRegistry;
import org.pentaho.reporting.libraries.resourceloader.CompoundResource;
import org.pentaho.reporting.libraries.resourceloader.DependencyCollector;
import org.pentaho.reporting.libraries.resourceloader.Resource;
import org.pentaho.reporting.libraries.resourceloader.ResourceCreationException;
import org.pentaho.reporting.libraries.resourceloader.ResourceData;
import org.pentaho.reporting.libraries.resourceloader.ResourceFactory;
import org.pentaho.reporting.libraries.resourceloader.ResourceKey;
import org.pentaho.reporting.libraries.resourceloader.ResourceLoadingException;
import org.pentaho.reporting.libraries.resourceloader.ResourceManager;
import org.w3c.css.sac.InputSource;
import org.w3c.css.sac.Parser;
import java.io.IOException;
/**
* Parses a single style rule.
*
* @author Thomas Morgner
*/
public class StyleRuleFactory implements ResourceFactory {
public StyleRuleFactory() {
}
public Resource create( final ResourceManager manager,
final ResourceData data,
final ResourceKey context )
throws ResourceCreationException, ResourceLoadingException {
try {
final Parser parser = CSSParserFactory.getInstance().createCSSParser();
final ResourceKey key;
final long version;
if ( context == null ) {
key = data.getKey();
version = data.getVersion( manager );
} else {
key = context;
version = -1;
}
final DocumentContext documentContext;
final StyleSheetHandler handler = new StyleSheetHandler();
handler.init( StyleKeyRegistry.getRegistry(), manager, key, version, null );
parser.setDocumentHandler( handler );
final InputSource inputSource = new InputSource();
inputSource.setByteStream( data.getResourceAsStream( manager ) );
handler.initParseContext( inputSource );
handler.setStyleRule( new CSSStyleRule( null, null ) );
parser.parseStyleDeclaration( inputSource );
final DependencyCollector dependencies = handler.getDependencies();
if ( context != null ) {
dependencies.add( data.getKey(), data.getVersion( manager ) );
}
CSSParserContext.getContext().destroy();
final CSSDeclarationRule styleRule = handler.getStyleRule();
if ( styleRule == null ) {
throw new ResourceCreationException( "Damn, the style rule is null" );
}
return new CompoundResource( data.getKey(), dependencies, styleRule, getFactoryType() );
} catch ( CSSParserInstantiationException e ) {
throw new ResourceCreationException( "Failed to parse the stylesheet." );
} catch ( IOException e ) {
throw new ResourceLoadingException( "Failed to load the stylesheet." );
}
}
public Class getFactoryType() {
return CSSDeclarationRule.class;
}
public void initializeDefaults() {
// nothing needed ...
}
}