/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2008, Open Source Geospatial Foundation (OSGeo)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
package org.geotools.temporal.object;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.opengis.temporal.Duration;
import org.opengis.temporal.Instant;
import org.opengis.temporal.OrdinalReferenceSystem;
import org.opengis.temporal.Period;
import org.opengis.temporal.RelativePosition;
import org.opengis.temporal.Separation;
import org.opengis.temporal.TemporalGeometricPrimitive;
/**
* An abstract class with two subclasses for representing
* a temporal instant and a temporal period.
*
* @author Mehdi Sidhoum (Geomatys)
*
*
*
* @source $URL$
*/
public abstract class DefaultTemporalGeometricPrimitive extends DefaultTemporalPrimitive implements TemporalGeometricPrimitive, Separation {
/**
* Returns the distance from this TM_GeometricPrimitive to another TM_GeometricPrimitive,
* i.e. the absolute value of the difference between their temporal positions.
* @param other
* @return
*/
public Duration distance(TemporalGeometricPrimitive other) {
Duration response = null;
long diff = 0L;
if (this instanceof Instant && other instanceof Instant) {
if (((Instant) this).getPosition().anyOther() != null && ((Instant) other).getPosition().anyOther() != null) {
if (!((DefaultTemporalPosition) ((Instant) this).getPosition().anyOther()).getFrame().equals(((DefaultTemporalPosition) ((Instant) other).getPosition().anyOther()).getFrame())) {
try {
throw new Exception("the TM_TemporalPositions are not both associated with the same TM_ReferenceSystem !");
} catch (Exception ex) {
Logger.getLogger(DefaultTemporalGeometricPrimitive.class.getName()).log(Level.SEVERE, null, ex);
}
}
} else if (((Instant) this).getPosition().anyOther() != null) {
if (((Instant) this).getPosition().anyOther().getIndeterminatePosition() != null ||
((DefaultTemporalPosition) ((Instant) this).getPosition().anyOther()).getFrame() instanceof OrdinalReferenceSystem) {
try {
throw new Exception("either of the two TM_TemporalPositions is indeterminate or is associated with a TM_OrdianlReferenceSystem !");
} catch (Exception ex) {
Logger.getLogger(DefaultTemporalGeometricPrimitive.class.getName()).log(Level.SEVERE, null, ex);
}
}
} else if (((Instant) other).getPosition().anyOther() != null) {
if (((Instant) other).getPosition().anyOther().getIndeterminatePosition() != null ||
((DefaultTemporalPosition) ((Instant) other).getPosition().anyOther()).getFrame() instanceof OrdinalReferenceSystem) {
try {
throw new Exception("either of the two TM_TemporalPositions is indeterminate or is associated with a TM_OrdianlReferenceSystem !");
} catch (Exception ex) {
Logger.getLogger(DefaultTemporalGeometricPrimitive.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
}
if (this.relativePosition(other).equals(RelativePosition.BEFORE) || this.relativePosition(other).equals(RelativePosition.AFTER)) {
if (this instanceof Instant && other instanceof Instant) {
diff = Math.min(Math.abs(((Instant) other).getPosition().getDate().getTime() - ((Instant) this).getPosition().getDate().getTime()),
Math.abs(((Instant) this).getPosition().getDate().getTime() - ((Instant) other).getPosition().getDate().getTime()));
} else {
if (this instanceof Instant && other instanceof Period) {
diff = Math.min(Math.abs(((Period) other).getBeginning().getPosition().getDate().getTime() - ((Instant) this).getPosition().getDate().getTime()),
Math.abs(((Period) other).getEnding().getPosition().getDate().getTime() - ((Instant) this).getPosition().getDate().getTime()));
} else {
if (this instanceof Period && other instanceof Instant) {
diff = Math.min(Math.abs(((Instant) other).getPosition().getDate().getTime() - ((Period) this).getEnding().getPosition().getDate().getTime()),
Math.abs(((Instant) other).getPosition().getDate().getTime() - ((Period) this).getBeginning().getPosition().getDate().getTime()));
} else {
if (this instanceof Period && other instanceof Period) {
diff = Math.min(Math.abs(((Period) other).getEnding().getPosition().getDate().getTime() - ((Period) this).getBeginning().getPosition().getDate().getTime()),
Math.abs(((Period) other).getBeginning().getPosition().getDate().getTime() - ((Period) this).getEnding().getPosition().getDate().getTime()));
}
}
}
}
} else {
if (this.relativePosition(other).equals(RelativePosition.BEGINS) ||
this.relativePosition(other).equals(RelativePosition.BEGUN_BY) ||
this.relativePosition(other).equals(RelativePosition.CONTAINS) ||
this.relativePosition(other).equals(RelativePosition.DURING) ||
this.relativePosition(other).equals(RelativePosition.ENDED_BY) ||
this.relativePosition(other).equals(RelativePosition.ENDS) ||
this.relativePosition(other).equals(RelativePosition.EQUALS) ||
this.relativePosition(other).equals(RelativePosition.MEETS) ||
this.relativePosition(other).equals(RelativePosition.MET_BY) ||
this.relativePosition(other).equals(RelativePosition.OVERLAPPED_BY) ||
this.relativePosition(other).equals(RelativePosition.OVERLAPS)) {
diff = 0L;
}
}
response = new DefaultPeriodDuration(Math.abs(diff));
return response;
}
/**
* Returns the length of this TM_GeometricPrimitive
* @return
*/
public Duration length() {
Duration response = null;
long diff = 0L;
if (this instanceof Instant) {
response = new DefaultPeriodDuration(Math.abs(diff));
return response;
} else {
if (this instanceof Period) {
if (((Period) this).getBeginning() != null &&
((Period) this).getEnding() != null) {
response = ((DefaultInstant) ((Period) this).getBeginning()).distance(((DefaultInstant) ((Period) this).getEnding()));
return response;
}
}
return null;
}
}
}