/*
* 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 - 2013 Object Refinery Ltd, Pentaho Corporation and Contributors.. All rights reserved.
*/
package org.pentaho.reporting.engine.classic.core.filter.templates;
import java.net.URL;
import org.pentaho.reporting.engine.classic.core.ReportElement;
import org.pentaho.reporting.engine.classic.core.filter.DataRowDataSource;
import org.pentaho.reporting.engine.classic.core.filter.ImageLoadFilter;
import org.pentaho.reporting.engine.classic.core.filter.URLFilter;
import org.pentaho.reporting.engine.classic.core.function.ExpressionRuntime;
/**
* An image URL field template, which reads the image from an URL supplied from a column in the DataRow.
*
* @author Thomas Morgner
*/
public class ImageURLFieldTemplate extends AbstractTemplate
{
/**
* An image load filter.
*/
private ImageLoadFilter imageLoadFilter;
/**
* A data row accessor.
*/
private DataRowDataSource dataRowDataSource;
/**
* A URL filter.
*/
private URLFilter urlFilter;
/**
* Creates a new template.
*/
public ImageURLFieldTemplate()
{
dataRowDataSource = new DataRowDataSource();
urlFilter = new URLFilter();
urlFilter.setDataSource(dataRowDataSource);
imageLoadFilter = new ImageLoadFilter();
imageLoadFilter.setDataSource(urlFilter);
}
/**
* Returns the name of the field from the data-row that the template gets images from.
*
* @return The field name.
*/
public String getField()
{
return dataRowDataSource.getDataSourceColumnName();
}
/**
* Sets the field name.
*
* @param field the field name.
*/
public void setField(final String field)
{
dataRowDataSource.setDataSourceColumnName(field);
}
/**
* Returns the formula used to compute the value of the data source.
*
* @return the formula.
*/
public String getFormula()
{
return dataRowDataSource.getFormula();
}
/**
* Defines the formula used to compute the value of this data source.
*
* @param formula the formula for the data source.
*/
public void setFormula(final String formula)
{
dataRowDataSource.setFormula(formula);
}
/**
* Returns the base URL.
*
* @return The base URL.
*/
public URL getBaseURL()
{
return urlFilter.getBaseURL();
}
/**
* Sets the base URL.
*
* @param baseURL the base URL.
*/
public void setBaseURL(final URL baseURL)
{
urlFilter.setBaseURL(baseURL);
}
/**
* 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 ReportElement element)
{
return imageLoadFilter.getValue(runtime, element);
}
/**
* Clones the template.
*
* @return the clone.
* @throws CloneNotSupportedException this should never happen.
*/
public ImageURLFieldTemplate clone()
throws CloneNotSupportedException
{
final ImageURLFieldTemplate template = (ImageURLFieldTemplate) super.clone();
template.imageLoadFilter = imageLoadFilter.clone();
template.urlFilter = (URLFilter) template.imageLoadFilter.getDataSource();
template.dataRowDataSource = (DataRowDataSource) template.urlFilter.getDataSource();
return template;
}
/**
* Returns the datarow data source used in this template.
*
* @return the datarow data source.
*/
protected DataRowDataSource getDataRowDataSource()
{
return dataRowDataSource;
}
}