package com.vividsolutions.jts.geom.prep;
import java.util.*;
import com.vividsolutions.jts.algorithm.*;
import com.vividsolutions.jts.algorithm.locate.PointOnGeometryLocator;
import com.vividsolutions.jts.algorithm.locate.SimplePointInAreaLocator;
import com.vividsolutions.jts.geom.*;
import com.vividsolutions.jts.geom.util.*;
/**
* A base class for predicate operations on {@link PreparedPolygon}s.
*
* @author mbdavis
*
*/
public abstract class PreparedPolygonPredicate
{
protected PreparedPolygon prepPoly;
private PointOnGeometryLocator targetPointLocator;
/**
* Creates an instance of this operation.
*
* @param prepPoly the PreparedPolygon to evaluate
*/
public PreparedPolygonPredicate(PreparedPolygon prepPoly)
{
this.prepPoly = prepPoly;
targetPointLocator = prepPoly.getPointLocator();
}
/**
* Tests whether all components of the test Geometry
* are contained in the target geometry.
* Handles both linear and point components.
*
* @param geom a geometry to test
* @return true if all componenta of the argument are contained in the target geometry
*/
protected boolean isAllTestComponentsInTarget(Geometry testGeom)
{
List coords = ComponentCoordinateExtracter.getCoordinates(testGeom);
for (Iterator i = coords.iterator(); i.hasNext(); ) {
Coordinate p = (Coordinate) i.next();
int loc = targetPointLocator.locate(p);
if (loc == Location.EXTERIOR)
return false;
}
return true;
}
/**
* Tests whether all components of the test Geometry
* are contained in the interior of the target geometry.
* Handles both linear and point components.
*
* @param geom a geometry to test
* @return true if all componenta of the argument are contained in the target geometry interior
*/
protected boolean isAllTestComponentsInTargetInterior(Geometry testGeom)
{
List coords = ComponentCoordinateExtracter.getCoordinates(testGeom);
for (Iterator i = coords.iterator(); i.hasNext(); ) {
Coordinate p = (Coordinate) i.next();
int loc = targetPointLocator.locate(p);
if (loc != Location.INTERIOR)
return false;
}
return true;
}
/**
* Tests whether any component of the test Geometry intersects
* the area of the target geometry.
* Handles test geometries with both linear and point components.
*
* @param geom a geometry to test
* @return true if any component of the argument intersects the prepared area geometry
*/
protected boolean isAnyTestComponentInTarget(Geometry testGeom)
{
List coords = ComponentCoordinateExtracter.getCoordinates(testGeom);
for (Iterator i = coords.iterator(); i.hasNext(); ) {
Coordinate p = (Coordinate) i.next();
int loc = targetPointLocator.locate(p);
if (loc != Location.EXTERIOR)
return true;
}
return false;
}
/**
* Tests whether any component of the test Geometry intersects
* the interior of the target geometry.
* Handles test geometries with both linear and point components.
*
* @param geom a geometry to test
* @return true if any component of the argument intersects the prepared area geometry interior
*/
protected boolean isAnyTestComponentInTargetInterior(Geometry testGeom)
{
List coords = ComponentCoordinateExtracter.getCoordinates(testGeom);
for (Iterator i = coords.iterator(); i.hasNext(); ) {
Coordinate p = (Coordinate) i.next();
int loc = targetPointLocator.locate(p);
if (loc == Location.INTERIOR)
return true;
}
return false;
}
/**
* Tests whether any component of the target geometry
* intersects the test geometry (which must be an areal geometry)
*
* @param geom the test geometry
* @param repPts the representative points of the target geometry
* @return true if any component intersects the areal test geometry
*/
protected boolean isAnyTargetComponentInAreaTest(Geometry testGeom, List targetRepPts)
{
PointOnGeometryLocator piaLoc = new SimplePointInAreaLocator(testGeom);
for (Iterator i = targetRepPts.iterator(); i.hasNext(); ) {
Coordinate p = (Coordinate) i.next();
int loc = piaLoc.locate(p);
if (loc != Location.EXTERIOR)
return true;
}
return false;
}
}