OmmWriter.java
/* Copyright 2002-2022 CS GROUP
* 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.files.ccsds.ndm.odm.omm;
import java.io.IOException;
import org.orekit.data.DataContext;
import org.orekit.files.ccsds.definitions.TimeSystem;
import org.orekit.files.ccsds.ndm.ParsedUnitsBehavior;
import org.orekit.files.ccsds.ndm.odm.CartesianCovarianceWriter;
import org.orekit.files.ccsds.ndm.odm.SpacecraftParametersWriter;
import org.orekit.files.ccsds.ndm.odm.UserDefinedWriter;
import org.orekit.files.ccsds.section.Header;
import org.orekit.files.ccsds.section.Segment;
import org.orekit.files.ccsds.section.XmlStructureKey;
import org.orekit.files.ccsds.utils.ContextBinding;
import org.orekit.files.ccsds.utils.FileFormat;
import org.orekit.files.ccsds.utils.generation.AbstractMessageWriter;
import org.orekit.files.ccsds.utils.generation.Generator;
import org.orekit.time.AbsoluteDate;
import org.orekit.utils.IERSConventions;
/**
* Writer for CCSDS Orbit Mean Mean-Elements Message.
*
* @author Luc Maisonobe
* @since 11.0
*/
public class OmmWriter extends AbstractMessageWriter<Header, Segment<OmmMetadata, OmmData>, Omm> {
/** Version number implemented. **/
public static final double CCSDS_OMM_VERS = 3.0;
/** Padding width for aligning the '=' sign. */
public static final int KVN_PADDING_WIDTH = 19;
/** Complete constructor.
* <p>
* Calling this constructor directly is not recommended. Users should rather use
* {@link org.orekit.files.ccsds.ndm.WriterBuilder#buildOmmWriter()
* writerBuilder.buildOmmWriter()}.
* </p>
* @param conventions IERS Conventions
* @param dataContext used to retrieve frames, time scales, etc.
* @param missionReferenceDate reference date for Mission Elapsed Time or Mission Relative Time time systems
*/
public OmmWriter(final IERSConventions conventions, final DataContext dataContext,
final AbsoluteDate missionReferenceDate) {
super(Omm.ROOT, Omm.FORMAT_VERSION_KEY, CCSDS_OMM_VERS,
new ContextBinding(
() -> conventions, () -> false, () -> dataContext,
() -> ParsedUnitsBehavior.STRICT_COMPLIANCE,
() -> missionReferenceDate, () -> TimeSystem.UTC,
() -> 0.0, () -> 1.0));
}
/** {@inheritDoc} */
@Override
public void writeSegmentContent(final Generator generator, final double formatVersion,
final Segment<OmmMetadata, OmmData> segment)
throws IOException {
// write the metadata
final ContextBinding oldContext = getContext();
final OmmMetadata metadata = segment.getMetadata();
setContext(new ContextBinding(oldContext::getConventions,
oldContext::isSimpleEOP,
oldContext::getDataContext,
oldContext::getParsedUnitsBehavior,
oldContext::getReferenceDate,
metadata::getTimeSystem,
oldContext::getClockCount,
oldContext::getClockRate));
new OmmMetadataWriter(metadata, getTimeConverter()).write(generator);
// start data block
if (generator.getFormat() == FileFormat.XML) {
generator.enterSection(XmlStructureKey.data.name());
}
// write mandatory mean Keplerian elements block
new MeanKeplerianElementsWriter(XmlSubStructureKey.meanElements.name(), null,
segment.getData().getKeplerianElementsBlock(),
getTimeConverter(), segment.getMetadata().theoryIsSgpSdp()).
write(generator);
if (segment.getData().getSpacecraftParametersBlock() != null) {
// write optional spacecraft parameters block
new SpacecraftParametersWriter(XmlSubStructureKey.spacecraftParameters.name(), null,
segment.getData().getSpacecraftParametersBlock()).
write(generator);
}
if (segment.getData().getTLEBlock() != null) {
new OmmTleWriter(XmlSubStructureKey.tleParameters.name(), null,
segment.getData().getTLEBlock()).
write(generator);
}
if (segment.getData().getCovarianceBlock() != null) {
// write optional spacecraft parameters block
new CartesianCovarianceWriter(XmlSubStructureKey.covarianceMatrix.name(), null,
segment.getData().getCovarianceBlock()).
write(generator);
}
if (segment.getData().getUserDefinedBlock() != null) {
// write optional user defined parameters block
new UserDefinedWriter(XmlSubStructureKey.userDefinedParameters.name(), null,
segment.getData().getUserDefinedBlock()).
write(generator);
}
// stop data block
if (generator.getFormat() == FileFormat.XML) {
generator.exitSection();
}
}
}