/*!
* 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.resolver.function.content;
import org.pentaho.reporting.libraries.css.resolver.function.ContentFunction;
import org.pentaho.reporting.libraries.css.resolver.function.FunctionUtilities;
import org.pentaho.reporting.libraries.css.resolver.tokens.statics.ResourceContentToken;
import org.pentaho.reporting.libraries.css.resolver.tokens.ContentToken;
import org.pentaho.reporting.libraries.css.resolver.FunctionEvaluationException;
import org.pentaho.reporting.libraries.css.values.CSSResourceValue;
import org.pentaho.reporting.libraries.css.values.CSSStringValue;
import org.pentaho.reporting.libraries.css.values.CSSValue;
import org.pentaho.reporting.libraries.css.values.CSSFunctionValue;
import org.pentaho.reporting.libraries.css.dom.LayoutElement;
import org.pentaho.reporting.libraries.css.dom.DocumentContext;
import org.pentaho.reporting.libraries.resourceloader.Resource;
/**
* Creation-Date: 16.04.2006, 14:14:42
*
* @author Thomas Morgner
*/
public class UrlValueFunction implements ContentFunction
{
public UrlValueFunction()
{
}
public ContentToken evaluate(final DocumentContext layoutProcess,
final LayoutElement element,
final CSSFunctionValue function)
throws FunctionEvaluationException
{
final CSSValue[] params = function.getParameters();
if (params.length != 1)
{
throw new FunctionEvaluationException();
}
final CSSValue value = FunctionUtilities.resolveParameter(layoutProcess, element, params[0]);
if (value instanceof CSSResourceValue)
{
final CSSResourceValue cssResourceValue =
(CSSResourceValue) value;
final Resource resource = cssResourceValue.getValue();
return new ResourceContentToken(resource);
}
if (value instanceof CSSStringValue == false)
{
throw new FunctionEvaluationException
("Not even remotely an URI: " + value);
}
final CSSStringValue strval = (CSSStringValue) value;
final CSSResourceValue cssResourceValue =
FunctionUtilities.loadResource(layoutProcess, strval.getValue());
final Resource resource = cssResourceValue.getValue();
return new ResourceContentToken(resource);
}
}