org.opengis.geometry.primitive

Interface Ring

All Superinterfaces:

Complex, Composite, CompositeCurve, Geometry, OrientableCurve, OrientablePrimitive, Primitive, TransfiniteSet

@UML(identifier="GM_Ring",
     specification=ISO_19107)
public interface Ring
extends CompositeCurve

Represent a single connected component of a surface boundary. It consists of a number of references to orientable curves connected in a cycle (an object whose boundary is empty). A Ring is structurally similar to a composite curve in that the end point of each orientable curve in the sequence is the start point of the next orientable curve in the sequence. Since the sequence is circular, there is no exception to this rule. Each ring, like all boundaries is a cycle and each ring is simple.

Even though each Ring is simple, the boundary need not be simple. The easiest case of this is where one of the interior rings of a surface is tangent to its exterior ring. Implementations may enforce stronger restrictions on the interaction of boundary elements.

Since:

GeoAPI 1.0

Author:

Martin Desruisseaux (IRD)

See Also:

SurfaceBoundary, Shell

Method Summary

Modifier and Type	Method and Description
boolean	isSimple() Always returns true since ring objects are simples.

Methods inherited from interface CompositeCurve

getGenerators

Methods inherited from interface Complex

getElements, getSubComplexes, getSuperComplexes, isMaximal

Methods inherited from interface OrientableCurve

getBoundary, getComposite, getPrimitive

Methods inherited from interface OrientablePrimitive

getOrientation

Methods inherited from interface Primitive

getComplexes, getContainedPrimitives, getContainingPrimitives, getProxy

Methods inherited from interface Geometry

clone, distance, getBuffer, getCentroid, getClosure, getConvexHull, getCoordinateDimension, getCoordinateReferenceSystem, getDimension, getEnvelope, getMaximalComplex, getMbRegion, getPrecision, getRepresentativePoint, isCycle, isMutable, toImmutable, transform, transform

Methods inherited from interface TransfiniteSet

contains, contains, difference, equals, intersection, intersects, symmetricDifference, union

Method Detail

isSimple

@UML(identifier="isSimple",
     obligation=MANDATORY,
     specification=ISO_19107)
boolean isSimple()

Always returns true since ring objects are simples.

Specified by:

isSimple in interface Geometry

Returns:

Always true.

See Also:

Geometry.isCycle()