/*
* 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 org.opengis.temporal.Instant;
import org.opengis.temporal.Period;
import org.opengis.temporal.RelativePosition;
import org.opengis.temporal.TemporalOrder;
import org.opengis.temporal.TemporalPrimitive;
/**
* An abstract class that represents a non-decomposed element of geometry or topology of time.
*
* @author Mehdi Sidhoum (Geomatys)
* @author Simone Giannecchini, GeoSolutions SAS
*
*
* @source $URL$
*/
public abstract class DefaultTemporalPrimitive extends DefaultTemporalObject implements TemporalPrimitive, TemporalOrder, Comparable<TemporalPrimitive> {
public int compareTo(TemporalPrimitive that) {
if (that==null)
throw new IllegalArgumentException("Provided temporal object is null");
final RelativePosition pos= this.relativePosition(that);
if(pos==null)
throw new ClassCastException("The provided object cannot be compared to this one");
if(pos==RelativePosition.BEFORE)
return -1;
if(pos==RelativePosition.AFTER)
return +1;
if(pos==RelativePosition.EQUALS)
return 0;
// TODO rethink this since it looks like it is a pretty dirty hack
if (this instanceof Period && that instanceof Instant||
this instanceof Instant && that instanceof Period) {
if(pos==RelativePosition.ENDED_BY||
pos==RelativePosition.BEGUN_BY||
pos==RelativePosition.CONTAINS)
return 0;
}
// TODO rethink this since it looks like it is a pretty dirty hack
if (this instanceof Period && that instanceof Period) {
if(pos==RelativePosition.MEETS)
return -1;
if(pos==RelativePosition.BEGINS)
return -1;
if(pos==RelativePosition.BEGUN_BY)
return +1;
if(pos==RelativePosition.ENDS)
return +1;
if(pos==RelativePosition.ENDED_BY)
return -1;
if(pos==RelativePosition.OVERLAPS)
return -1;
if(pos==RelativePosition.OVERLAPPED_BY)
return +1;
if(pos==RelativePosition.DURING||
pos==RelativePosition.CONTAINS||
pos==RelativePosition.EQUALS)
return 0;
}
throw new IllegalStateException("Unable to compare the provided object with this one");
}
/**
* Returns a value for relative position which are provided by the enumerated data type TM_RelativePosition
* and are based on the 13 temporal relationships identified by Allen (1983).
* @param other TemporalPrimitive
* @return
*/
public RelativePosition relativePosition(TemporalPrimitive other) {
if (this instanceof Instant && other instanceof Instant) {
Instant timeobject = (Instant) this;
Instant instantOther = (Instant) other;
if (timeobject.getPosition().getDate().before(instantOther.getPosition().getDate())) {
return RelativePosition.BEFORE;
} else {
return (timeobject.getPosition().getDate().compareTo(instantOther.getPosition().getDate()) == 0) ? RelativePosition.EQUALS : RelativePosition.AFTER;
}
} else {
if (this instanceof Period && other instanceof Instant) {
Period timeobject = (Period) this;
Instant instantarg = (Instant) other;
if (timeobject.getEnding().getPosition().getDate().before(instantarg.getPosition().getDate())) {
return RelativePosition.BEFORE;
} else {
if (timeobject.getEnding().getPosition().getDate().compareTo(instantarg.getPosition().getDate()) == 0) {
return RelativePosition.ENDED_BY;
} else {
if (timeobject.getBeginning().getPosition().getDate().before(instantarg.getPosition().getDate()) &&
timeobject.getEnding().getPosition().getDate().after(instantarg.getPosition().getDate())) {
return RelativePosition.CONTAINS;
} else {
return (timeobject.getBeginning().getPosition().getDate().compareTo(instantarg.getPosition().getDate()) == 0) ? RelativePosition.BEGUN_BY : RelativePosition.AFTER;
}
}
}
} else {
if (this instanceof Instant && other instanceof Period) {
Instant timeobject = (Instant) this;
Period instantarg = (Period) other;
if (instantarg.getEnding().getPosition().getDate().before(timeobject.getPosition().getDate())) {
return RelativePosition.AFTER;
} else {
if (instantarg.getEnding().getPosition().getDate().compareTo(timeobject.getPosition().getDate()) == 0) {
return RelativePosition.ENDS;
} else {
if (instantarg.getBeginning().getPosition().getDate().before(timeobject.getPosition().getDate()) &&
instantarg.getEnding().getPosition().getDate().after(timeobject.getPosition().getDate())) {
return RelativePosition.DURING;
} else {
return (instantarg.getBeginning().getPosition().getDate().compareTo(timeobject.getPosition().getDate()) == 0) ? RelativePosition.BEGINS : RelativePosition.BEFORE;
}
}
}
} else {
if (this instanceof Period && other instanceof Period) {
Period timeobject = (Period) this;
Period instantarg = (Period) other;
if (timeobject.getEnding().getPosition().getDate().before(instantarg.getBeginning().getPosition().getDate())) {
return RelativePosition.BEFORE;
} else {
if (timeobject.getEnding().getPosition().getDate().compareTo(instantarg.getBeginning().getPosition().getDate()) == 0) {
return RelativePosition.MEETS;
} else {
if (timeobject.getBeginning().getPosition().getDate().before(instantarg.getBeginning().getPosition().getDate()) &&
timeobject.getEnding().getPosition().getDate().after(instantarg.getBeginning().getPosition().getDate()) &&
timeobject.getEnding().getPosition().getDate().before(instantarg.getEnding().getPosition().getDate())) {
return RelativePosition.OVERLAPS;
} else {
if (timeobject.getBeginning().getPosition().getDate().compareTo(instantarg.getBeginning().getPosition().getDate()) == 0 &&
timeobject.getEnding().getPosition().getDate().before(instantarg.getEnding().getPosition().getDate())) {
return RelativePosition.BEGINS;
} else {
if (timeobject.getBeginning().getPosition().getDate().compareTo(instantarg.getBeginning().getPosition().getDate()) == 0 &&
timeobject.getEnding().getPosition().getDate().after(instantarg.getEnding().getPosition().getDate())) {
return RelativePosition.BEGUN_BY;
} else {
if (timeobject.getBeginning().getPosition().getDate().after(instantarg.getBeginning().getPosition().getDate()) &&
timeobject.getEnding().getPosition().getDate().before(instantarg.getEnding().getPosition().getDate())) {
return RelativePosition.DURING;
} else {
if (timeobject.getBeginning().getPosition().getDate().before(instantarg.getBeginning().getPosition().getDate()) &&
timeobject.getEnding().getPosition().getDate().after(instantarg.getEnding().getPosition().getDate())) {
return RelativePosition.CONTAINS;
} else {
if (timeobject.getBeginning().getPosition().getDate().compareTo(instantarg.getBeginning().getPosition().getDate()) == 0 &&
timeobject.getEnding().getPosition().getDate().compareTo(instantarg.getEnding().getPosition().getDate()) == 0) {
return RelativePosition.EQUALS;
} else {
if (timeobject.getBeginning().getPosition().getDate().after(instantarg.getBeginning().getPosition().getDate()) &&
timeobject.getBeginning().getPosition().getDate().before(instantarg.getEnding().getPosition().getDate()) &&
timeobject.getEnding().getPosition().getDate().after(instantarg.getEnding().getPosition().getDate())) {
return RelativePosition.OVERLAPPED_BY;
} else {
if (timeobject.getBeginning().getPosition().getDate().after(instantarg.getBeginning().getPosition().getDate()) &&
timeobject.getEnding().getPosition().getDate().compareTo(instantarg.getEnding().getPosition().getDate()) == 0) {
return RelativePosition.ENDS;
} else {
if (timeobject.getBeginning().getPosition().getDate().before(instantarg.getBeginning().getPosition().getDate()) &&
timeobject.getEnding().getPosition().getDate().compareTo(instantarg.getEnding().getPosition().getDate()) == 0) {
return RelativePosition.ENDED_BY;
} else {
return (timeobject.getBeginning().getPosition().getDate().compareTo(instantarg.getEnding().getPosition().getDate()) == 0) ? RelativePosition.MET_BY : RelativePosition.AFTER;
}
}
}
}
}
}
}
}
}
}
}
} else {
return null;
}
}
}
}
}
}