/*
* 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 org.pentaho.reporting.engine.classic.core.ReportElement;
import org.pentaho.reporting.engine.classic.core.filter.StaticDataSource;
import org.pentaho.reporting.engine.classic.core.filter.StringFilter;
import org.pentaho.reporting.engine.classic.core.function.ExpressionRuntime;
/**
* A label template can be used to describe static text content.
*
* @author Thomas Morgner
*/
public class LabelTemplate extends AbstractTemplate {
/**
* A static data source.
*/
private StaticDataSource staticDataSource;
/**
* A string filter.
*/
private StringFilter stringFilter;
/**
* Creates a new label template.
*/
public LabelTemplate() {
staticDataSource = new StaticDataSource();
stringFilter = new StringFilter();
stringFilter.setDataSource( staticDataSource );
}
/**
* Sets the text for the label.
*
* @param content
* the text.
*/
public void setContent( final String content ) {
staticDataSource.setValue( content );
}
/**
* Returns the text for the label.
*
* @return The text.
*/
public String getContent() {
return (String) ( staticDataSource.getValue( null, null ) );
}
/**
* Returns the string that represents <code>null</code>.
*
* @return The string that represents <code>null</code>.
*/
public String getNullValue() {
return stringFilter.getNullValue();
}
/**
* Sets the string that represents <code>null</code>.
*
* @param nullValue
* the string.
*/
public void setNullValue( final String nullValue ) {
stringFilter.setNullValue( nullValue );
}
/**
* 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 stringFilter.getValue( runtime, element );
}
/**
* Clones the template.
*
* @return the clone.
* @throws CloneNotSupportedException
* this should never happen.
*/
public LabelTemplate clone() throws CloneNotSupportedException {
final LabelTemplate template = (LabelTemplate) super.clone();
template.stringFilter = stringFilter.clone();
template.staticDataSource = (StaticDataSource) template.stringFilter.getDataSource();
return template;
}
}