/*!
* 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.engine.classic.core.function;
import org.pentaho.reporting.engine.classic.core.designtime.DesignTimeContext;
import java.util.Locale;
import java.util.Map;
/**
* A decorator interface that allows an expression to validate it's parameters. The validation is returned as map of
* fieldnames and validation messages. If global validation messages need to be published, these messages will be stored
* with a <code>null</code> key.
*
* @author Thomas Morgner.
*/
public interface ValidateableExpression extends Expression {
public Map validateParameter( final DesignTimeContext designTimeContext, final Locale locale );
}