/*
* 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) 2001 - 2009 Object Refinery Ltd, Pentaho Corporation and Contributors.. All rights reserved.
*/
package org.pentaho.reporting.engine.classic.core.filter;
import org.pentaho.reporting.engine.classic.core.Anchor;
import org.pentaho.reporting.engine.classic.core.Element;
import org.pentaho.reporting.engine.classic.core.function.ExpressionRuntime;
/**
* The AnchorFilter converts arbitary objects into Anchors.
*
* @author Thomas Morgner
* @see Anchor
* @deprecated The anchor filter is deprecated now. Use the stylekey "anchor" instead.
*/
public class AnchorFilter implements DataFilter
{
/**
* The data source from where to get the values for the anchor.
*/
private DataSource dataSource;
/**
* DefaultConstructor.
*/
public AnchorFilter()
{
}
/**
* Clones this <code>DataSource</code>.
*
* @return the clone.
* @throws CloneNotSupportedException this should never happen.
*/
public Object clone()
throws CloneNotSupportedException
{
final AnchorFilter af = (AnchorFilter) super.clone();
if (dataSource == null)
{
af.dataSource = null;
}
else
{
af.dataSource = (DataSource) dataSource.clone();
}
return af;
}
/**
* Returns the current value for the data source.
*
* @param runtime the expression runtime that is used to evaluate formulas and expressions when computing the value of
* this filter.
* @param element
* @return the value.
*/
public Object getValue(final ExpressionRuntime runtime, final Element element)
{
if (dataSource == null)
{
return null;
}
final Object value = dataSource.getValue(runtime, element);
if (value == null)
{
return null;
}
if (value instanceof Anchor)
{
return value;
}
return new Anchor(String.valueOf(value));
}
/**
* Returns the assigned DataSource for this Target.
*
* @return The datasource.
*/
public DataSource getDataSource()
{
return dataSource;
}
/**
* Assigns a DataSource for this Target.
*
* @param ds The data source.
*/
public void setDataSource(final DataSource ds)
{
this.dataSource = ds;
}
}