KalmanObserver.java
/*
* Licensed to the Hipparchus project under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The Hipparchus project 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
*
* https://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,
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* See the License for the specific language governing permissions and
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*/
package org.hipparchus.filtering.kalman;
/** Observer for Kalman filter recursions.
* <p>
* This interface is intended to be implemented by users to monitor
* the progress of the Kalman filter estimator during estimation.
* </p>
*/
public interface KalmanObserver {
/** Callback for initialisation of observer.
* @param estimate estimate calculated by a Kalman filter
*/
default void init(KalmanEstimate estimate) {}
/** Notification callback after each Kalman filter measurement update.
* @param estimate estimate calculated by a Kalman filter
*/
void updatePerformed(KalmanEstimate estimate);
}