GatheringSubscriber.java
/* Copyright 2002-2024 Luc Maisonobe
* Licensed to CS GROUP (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.estimation.measurements.generation;
import java.util.Collections;
import java.util.Comparator;
import java.util.SortedSet;
import java.util.TreeSet;
import org.orekit.estimation.measurements.ComparableMeasurement;
import org.orekit.estimation.measurements.ObservedMeasurement;
import org.orekit.time.AbsoluteDate;
/** Subscriber that gather all generated measurements in a sorted set.
* @author Luc Maisonobe
* @since 12.0
*/
public class GatheringSubscriber implements GeneratedMeasurementSubscriber {
/** Set for holding measurements. */
private SortedSet<ObservedMeasurement<?>> measurements;
/** Simple constructor.
*/
public GatheringSubscriber() {
measurements = Collections.emptySortedSet();
}
/** {@inheritDoc} */
@Override
public void init(final AbsoluteDate start, final AbsoluteDate end) {
final Comparator<ObservedMeasurement<?>> comparator = end.isAfterOrEqualTo(start) ?
Comparator.naturalOrder() :
Comparator.reverseOrder();
measurements = new TreeSet<>(comparator);
}
/** {@inheritDoc} */
@Override
public void handleGeneratedMeasurement(final ObservedMeasurement<?> measurement) {
measurements.add(measurement);
}
/** Get generated measurements.
* <p>
* The measurements are sorted according to {@link ComparableMeasurement} if
* generation was chronological, or reversed {@link ComparableMeasurement} if
* generation was non-chronological.
* </p>
* @return unmodifiable view of generated measurements
*/
public SortedSet<ObservedMeasurement<?>> getGeneratedMeasurements() {
return Collections.unmodifiableSortedSet(measurements);
}
}