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/**
* ===========================================
* LibLayout : a free Java layouting library
* ===========================================
*
* Project Info: http://reporting.pentaho.org/liblayout/
*
* (C) Copyright 2006-2007, by Pentaho Corporation and Contributors.
*
* This library is free software; you can redistribute it and/or modify it under the terms
* of the GNU Lesser General Public License as published by the Free Software Foundation;
* either version 2.1 of the License, or (at your option) any later version.
*
* This library 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.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* ------------
* $Id: UrlValueFunction.java 3524 2007-10-16 11:26:31Z tmorgner $
* ------------
* (C) Copyright 2006-2007, by Pentaho Corporation.
*/
package org.jfree.layouting.layouter.style.functions.values;
import org.jfree.layouting.LayoutProcess;
import org.jfree.layouting.input.style.values.CSSFunctionValue;
import org.jfree.layouting.input.style.values.CSSStringValue;
import org.jfree.layouting.input.style.values.CSSValue;
import org.jfree.layouting.layouter.model.LayoutElement;
import org.jfree.layouting.layouter.style.functions.FunctionEvaluationException;
import org.jfree.layouting.layouter.style.functions.FunctionUtilities;
import org.jfree.layouting.layouter.style.values.CSSResourceValue;
/**
* Creation-Date: 16.04.2006, 14:14:42
*
* @author Thomas Morgner
*/
public class UrlValueFunction implements StyleValueFunction
{
public UrlValueFunction()
{
}
public CSSValue evaluate(final LayoutProcess 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)
{
return value;
}
if (value instanceof CSSStringValue == false)
{
throw new FunctionEvaluationException
("Not even remotely an URI: " + value);
}
final CSSStringValue strval = (CSSStringValue) value;
return FunctionUtilities.loadResource(layoutProcess, strval.getValue());
}
}
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