/**
* Returns a boolean value that shows if whether relationships between the boundaries, interiors
* and exteriors of two geometries match the pattern specified in intersection-matrix-pattern.
*
* @param node1 xml element containing gml object(s)
* @param node2 xml element containing gml object(s)
* @param intersectionMatrix intersection matrix for two geometries
* @return boolean value
* @throws QueryException query exception
*/
@Deterministic
public Bln relate(final ANode node1, final ANode node2, final Str intersectionMatrix)
throws QueryException {
final Geometry geo1 = checkGeo(node1);
final Geometry geo2 = checkGeo(node2);
return Bln.get(geo1.relate(geo2, intersectionMatrix.toJava()));
}
/**
* Return a boolean value that shows weather the line is a ring or not. A line is a ring if it is
* closed and simple.
*
* @param node xml element containing gml object(s)
* @return boolean value
* @throws QueryException query exception
*/
@Deterministic
public Bln isRing(final ANode node) throws QueryException {
final Geometry geo = geo(node, Q_GML_LINEARRING, Q_GML_LINESTRING);
if (geo == null && checkGeo(node) != null)
throw GeoErrors.geoType(node.qname().local(), "Line");
return Bln.get(((LineString) geo).isRing());
}
/**
* Checks if the line is closed loop. That is, if the start Point is same with end Point.
*
* @param node xml element containing gml object(s)
* @return boolean value
* @throws QueryException query exception
*/
@Deterministic
public Bln isClosed(final ANode node) throws QueryException {
final Geometry geo = geo(node, Q_GML_LINEARRING, Q_GML_LINESTRING, Q_GML_MULTILINESTRING);
if (geo == null && checkGeo(node) != null)
throw GeoErrors.geoType(node.qname().local(), "Line");
return Bln.get(
geo instanceof LineString
? ((LineString) geo).isClosed()
: ((MultiLineString) geo).isClosed());
}
/**
* Checks if the specified item is a boolean. Returns the boolean or throws an exception.
*
* @param it item be checked
* @return boolean
* @throws QueryException query exception
*/
protected final boolean toBoolean(final Item it) throws QueryException {
final Type ip = checkNoEmpty(it, AtomType.BLN).type;
if (ip == AtomType.BLN) return it.bool(info);
if (ip.isUntyped()) return Bln.parse(it.string(info), info);
throw castError(it, AtomType.BLN, info);
}
/**
* Returns a boolean value that shows if this geometry overlaps the specified geometry.
*
* @param node1 xml element containing gml object(s)
* @param node2 xml element containing gml object(s)
* @return boolean value
* @throws QueryException query exception
*/
@Deterministic
public Bln overlaps(final ANode node1, final ANode node2) throws QueryException {
final Geometry geo1 = checkGeo(node1);
final Geometry geo2 = checkGeo(node2);
return Bln.get(geo1.overlaps(geo2));
}
/**
* Returns a boolean value which shows if the specified geometry is simple or not, which has no
* anomalous geometric points, such as self intersection or self tangency.
*
* @param node xml element containing gml object(s)
* @return boolean value
* @throws QueryException query exception
*/
@Deterministic
public Bln isSimple(final ANode node) throws QueryException {
return Bln.get(checkGeo(node).isSimple());
}
/**
* Returns a boolean value which shows if the specified geometry is empty or not.
*
* @param node xml element containing gml object(s)
* @return boolean value
* @throws QueryException query exception
*/
@Deterministic
public Bln isEmpty(final ANode node) throws QueryException {
return Bln.get(node != null && checkGeo(node) != null);
}
/**
* Evaluates the match function.
*
* @param val input value
* @param ctx query context
* @return function result
* @throws QueryException query exception
*/
private Item matches(final byte[] val, final QueryContext ctx) throws QueryException {
final Pattern p = pattern(expr[1], expr.length == 3 ? expr[2] : null, ctx);
return Bln.get(p.matcher(string(val)).find());
}