/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2004-2008, Open Source Geospatial Foundation (OSGeo)
*
* 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;
* version 2.1 of the License.
*
* 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.
*/
package org.geotools.filter;
import java.util.List;
/**
* Function expression registered for database server execution.
*
* <p>
*
* There is no requirement that this function be registered in any data store for this class to be
* instantiated. This class could have been called
* OhNoWeDoNotImplementThisLetUsHopeItIsADatabaseRegisteredFunction, because we might not know when
* it is instantiated if it is registered.
*
* <p>
*
* The number of arguments is deduced from the number provided. We hope they match.
*
* @author Ben Caradoc-Davies, CSIRO Exploration and Mining
* @version $Id$
*
* @source $URL$
* @since 2.4
*/
public class RegisteredFunction extends FunctionExpressionImpl {
private final int argCount;
public RegisteredFunction(String name, List parameters) {
super(name);
// assume that we are called with the correct number of arguments
argCount = parameters.size();
setParameters(parameters);
}
/**
* Gets the number of arguments that are set.
*
* @return the number of args.
* @see org.geotools.filter.FunctionExpressionImpl#getArgCount()
*/
public int getArgCount() {
return argCount;
}
}