CdmWriter.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.cdm;
import java.io.IOException;
import org.hipparchus.geometry.euclidean.threed.Vector3D;
import org.orekit.data.DataContext;
import org.orekit.files.ccsds.definitions.TimeSystem;
import org.orekit.files.ccsds.definitions.Units;
import org.orekit.files.ccsds.ndm.ParsedUnitsBehavior;
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.Generator;
import org.orekit.utils.IERSConventions;
import org.orekit.utils.units.Unit;
/**
* Writer for CCSDS Conjunction Data Message.
*
* @author Melina Vanel
* @since 11.2
*/
public class CdmWriter extends CdmMessageWriter {
/** Version number implemented. **/
public static final double CCSDS_CDM_VERS = 1.0;
/** Padding width for aligning the '=' sign. */
public static final int KVN_PADDING_WIDTH = 17;
/** */
private final Vector3D NANVECTOR = new Vector3D(Double.NaN, Double.NaN, Double.NaN);
/** Complete constructor.
* <p>
* Calling this constructor directly is not recommended. Users should rather use
* {@link org.orekit.files.ccsds.ndm.WriterBuilder#buildCdmWriter()
* writerBuilder.buildCdmWriter()}.
* </p>
* @param conventions IERS Conventions
* @param dataContext used to retrieve frames, time scales, etc.
*/
public CdmWriter(final IERSConventions conventions, final DataContext dataContext) {
super(Cdm.ROOT, Cdm.FORMAT_VERSION_KEY, CCSDS_CDM_VERS,
new ContextBinding(
() -> conventions,
() -> false, () -> dataContext, () -> ParsedUnitsBehavior.STRICT_COMPLIANCE,
() -> null, () -> TimeSystem.UTC,
() -> 0.0, () -> 1.0));
}
/** {@inheritDoc} */
@Override
public void writeSegmentContent(final Generator generator, final double formatVersion,
final Segment<CdmMetadata, CdmData> segment)
throws IOException {
// write the metadata
final ContextBinding oldContext = getContext();
final CdmMetadata metadata = segment.getMetadata();
setContext(new ContextBinding(oldContext::getConventions,
oldContext::isSimpleEOP,
oldContext::getDataContext,
oldContext::getParsedUnitsBehavior,
oldContext::getReferenceDate,
metadata::getTimeSystem,
oldContext::getClockCount,
oldContext::getClockRate));
new CdmMetadataWriter(metadata).write(generator);
// start data block
if (generator.getFormat() == FileFormat.XML) {
generator.enterSection(XmlStructureKey.data.name());
}
if (segment.getData().getODParametersBlock() != null) {
// write optional OD parameters block
generator.writeComments(segment.getData().getComments());
new ODParametersWriter(XmlSubStructureKey.odParameters.name(), null,
segment.getData().getODParametersBlock(), getTimeConverter()).
write(generator);
}
if (segment.getData().getAdditionalParametersBlock() != null) {
// write optional additional parameters block
new AdditionalParametersWriter(XmlSubStructureKey.additionalParameters.name(), null,
segment.getData().getAdditionalParametersBlock()).
write(generator);
}
// write mandatory state vector block
new StateVectorWriter(XmlSubStructureKey.stateVector.name(), null,
segment.getData().getStateVectorBlock()).
write(generator);
// write mandatory RTN covariance block
new RTNCovarianceWriter(XmlSubStructureKey.covarianceMatrix.name(), null,
segment.getData().getRTNCovarianceBlock()).
write(generator);
// stop data block
if (generator.getFormat() == FileFormat.XML) {
generator.exitSection();
}
}
@Override
public void writeRelativeMetadataContent(final Generator generator, final double formatVersion,
final CdmRelativeMetadata relativeMetadata) throws IOException {
// Is written only once
// start relative metadata block
if (generator.getFormat() == FileFormat.XML) {
generator.enterSection(XmlSubStructureKey.relativeMetadataData.name());
}
generator.writeComments(relativeMetadata.getComment());
generator.writeEntry(CdmRelativeMetadataKey.TCA.name(), getTimeConverter(), relativeMetadata.getTca(), true);
generator.writeEntry(CdmRelativeMetadataKey.MISS_DISTANCE.name(), relativeMetadata.getMissDistance(), Unit.METRE, true);
generator.writeEntry(CdmRelativeMetadataKey.RELATIVE_SPEED.name(), relativeMetadata.getRelativeSpeed(), Units.M_PER_S, false);
// start relative state vector block
if (generator.getFormat() == FileFormat.XML && (relativeMetadata.getRelativePosition() != NANVECTOR ||
relativeMetadata.getRelativeVelocity() != NANVECTOR)) {
generator.enterSection(XmlSubStructureKey.relativeStateVector.name());
}
if (relativeMetadata.getRelativePosition() != NANVECTOR) {
generator.writeEntry(CdmRelativeMetadataKey.RELATIVE_POSITION_R.name(),
relativeMetadata.getRelativePosition().getX(), Unit.METRE, false);
generator.writeEntry(CdmRelativeMetadataKey.RELATIVE_POSITION_T.name(),
relativeMetadata.getRelativePosition().getY(), Unit.METRE, false);
generator.writeEntry(CdmRelativeMetadataKey.RELATIVE_POSITION_N.name(),
relativeMetadata.getRelativePosition().getZ(), Unit.METRE, false);
}
if (relativeMetadata.getRelativeVelocity() != NANVECTOR) {
generator.writeEntry(CdmRelativeMetadataKey.RELATIVE_VELOCITY_R.name(),
relativeMetadata.getRelativeVelocity().getX(), Units.M_PER_S, false);
generator.writeEntry(CdmRelativeMetadataKey.RELATIVE_VELOCITY_T.name(),
relativeMetadata.getRelativeVelocity().getY(), Units.M_PER_S, false);
generator.writeEntry(CdmRelativeMetadataKey.RELATIVE_VELOCITY_N.name(),
relativeMetadata.getRelativeVelocity().getZ(), Units.M_PER_S, false);
}
// stop relative state vector block
if (generator.getFormat() == FileFormat.XML &&
(relativeMetadata.getRelativePosition() != NANVECTOR || relativeMetadata.getRelativeVelocity() != NANVECTOR)) {
generator.exitSection();
}
generator.writeEntry(CdmRelativeMetadataKey.START_SCREEN_PERIOD.name(), getTimeConverter(),
relativeMetadata.getStartScreenPeriod(), false);
generator.writeEntry(CdmRelativeMetadataKey.STOP_SCREEN_PERIOD.name(), getTimeConverter(),
relativeMetadata.getStopScreenPeriod(), false);
generator.writeEntry(CdmRelativeMetadataKey.SCREEN_VOLUME_FRAME.name(), relativeMetadata.getScreenVolumeFrame(), false);
generator.writeEntry(CdmRelativeMetadataKey.SCREEN_VOLUME_SHAPE.name(), relativeMetadata.getScreenVolumeShape(), false);
generator.writeEntry(CdmRelativeMetadataKey.SCREEN_VOLUME_X.name(), relativeMetadata.getScreenVolumeX(), Unit.METRE, false);
generator.writeEntry(CdmRelativeMetadataKey.SCREEN_VOLUME_Y.name(), relativeMetadata.getScreenVolumeY(), Unit.METRE, false);
generator.writeEntry(CdmRelativeMetadataKey.SCREEN_VOLUME_Z.name(), relativeMetadata.getScreenVolumeZ(), Unit.METRE, false);
generator.writeEntry(CdmRelativeMetadataKey.SCREEN_ENTRY_TIME.name(), getTimeConverter(),
relativeMetadata.getScreenEntryTime(), false);
generator.writeEntry(CdmRelativeMetadataKey.SCREEN_EXIT_TIME.name(), getTimeConverter(),
relativeMetadata.getScreenExitTime(), false);
generator.writeEntry(CdmRelativeMetadataKey.COLLISION_PROBABILITY.name(), relativeMetadata.getCollisionProbability(), Unit.ONE, false);
if (relativeMetadata.getCollisionProbaMethod() != null) {
generator.writeEntry(CdmRelativeMetadataKey.COLLISION_PROBABILITY_METHOD.name(),
relativeMetadata.getCollisionProbaMethod().getName(), null, false);
}
// stop relative metadata block
if (generator.getFormat() == FileFormat.XML) {
generator.exitSection();
}
}
}