/* Copyright 2002-2017 CS Systèmes d'Information
* Licensed to CS Systèmes d'Information (CS) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* CS licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.orekit.utils;
import org.orekit.errors.OrekitException;
/** Interface for observing parameters changes.
* @see ParameterDriver
* @author Luc Maisonobe
* @since 8.0
*/
public interface ParameterObserver {
/** Notify that a parameter value has been changed.
* @param previousValue TODO
* @param driver parameter driver that has been changed
* @exception OrekitException if value is invalid for the driven model
*/
void valueChanged(double previousValue, ParameterDriver driver) throws OrekitException;
}