Package org.opengis.geometry.primitive
Interface Primitive

 All Superinterfaces:
Geometry
,TransfiniteSet
 All Known Subinterfaces:
CompositeCurve
,CompositeSolid
,CompositeSurface
,Curve
,OrientableCurve
,OrientablePrimitive
,OrientableSurface
,Point
,PolyhedralSurface
,Ring
,Shell
,Solid
,Surface
,Tin
,TriangulatedSurface
@UML(identifier="GM_Primitive", specification=ISO_19107) public interface Primitive extends Geometry
Abstract root class of the geometric primitives. Its main purpose is to define the basic "boundary" operation that ties the primitives in each dimension together. A geometric primitive is a geometric object that is not decomposed further into other primitives in the system. This includes curves and surfaces, even though they are composed of curve segments and surface patches, respectively. Those curve segments and surface patches cannot exist outside the context of a primitive.Any geometric object that is used to describe a feature is a collection of geometric primitives. A collection of geometric primitives may or may not be a geometric complex. Geometric complexes have additional properties such as closure by boundary operations and mutually exclusive component parts.
Primitive
andComplex
share most semantics, in the meaning of operations and attributes. There is an exception in that aPrimitive
shall not contain its boundary (except in the trivial case of point where the boundary is empty), while a complex shall contain its boundary in all cases. Since:
 GeoAPI 1.0
 See Also:
PrimitiveFactory.createPrimitive(org.opengis.geometry.Envelope)
 TODO:
 Some associations are commented out for now.


Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description PrimitiveBoundary
getBoundary()
Returns the boundary of aPrimitive
as a set ofPrimitive
s.Set<Complex>
getComplexes()
Returns the set of complexes which contains this primitive.Composite
getComposite()
Returns the owner of this primitive.Set<Primitive>
getContainedPrimitives()
Returns thePrimitive
s which are by definition coincident with this one.Set<Primitive>
getContainingPrimitives()
Returns thePrimitive
s which are by definition coincident with this one.OrientablePrimitive[]
getProxy()
Returns the orientable primitives associated with this primitive.
Methods inherited from interface Geometry
clone, distance, getBuffer, getCentroid, getClosure, getConvexHull, getCoordinateDimension, getCoordinateReferenceSystem, getDimension, getEnvelope, getMaximalComplex, getMbRegion, getPrecision, getRepresentativePoint, isCycle, isMutable, isSimple, toImmutable, transform, transform

Methods inherited from interface TransfiniteSet
contains, contains, difference, equals, intersection, intersects, symmetricDifference, union




Method Detail

getBoundary
@UML(identifier="boundary", obligation=MANDATORY, specification=ISO_19107) PrimitiveBoundary getBoundary()
Returns the boundary of aPrimitive
as a set ofPrimitive
s. This is a specialization of the operation atGeometry
, which does not restrict the class of the returned collection. The organization of the boundary set of aPrimitive
depends on the type of the primitive. Specified by:
getBoundary
in interfaceGeometry
 Returns:
 the sets of positions on the boundary.
 See Also:
Geometry.getMbRegion()
,Geometry.getClosure()
,Geometry.getBuffer(double)

getContainedPrimitives
@UML(identifier="containedPrimitive", obligation=MANDATORY, specification=ISO_19107) Set<Primitive> getContainedPrimitives()
Returns thePrimitive
s which are by definition coincident with this one. This allows applications to override theTransfiniteSet<DirectPosition>
interpretation and its associated computational geometry, and declare onePrimitive
to be "interior to" another. This set should normally be empty when thePrimitive
s are within a complex, since in that case the boundary information is sufficient for most cases. This association should not be used when the twoPrimitive
s are not close to one another. The intent is to allow applications to compensate for inherent and unavoidable round off, truncation, and other mathematical problems indigenous to computer calculations. Returns:
 the set of primitives contained into this primitive.
 See Also:
getContainingPrimitives()
 TODO:
 Using a
Set
returns type allows the user to add or remove element in this set at his convenience. Is it the right interpretation of this specification?

getContainingPrimitives
@UML(identifier="containingPrimitive", obligation=MANDATORY, specification=ISO_19107) Set<Primitive> getContainingPrimitives()
Returns thePrimitive
s which are by definition coincident with this one. Returns:
 the set of primitives which contains this primitive.
 See Also:
getContainedPrimitives()
 TODO:
 Using a
Set
returns type allows the user to add or remove element in this set at his convenience. Is it the right interpretation of this specification?, Should we stretch out some relation with contained primitive? For example should we update the specification with something like the following? "InvokingB.getContainingPrimitive().add(A)
is equivalent to invokingA.getContainedPrimitive().add(B)
".

getComplexes
@UML(identifier="complex", obligation=MANDATORY, specification=ISO_19107) Set<Complex> getComplexes()
Returns the set of complexes which contains this primitive. APrimitive
may be in several complexes. This association may not be navigable in this direction (from primitive to complex), depending on the implementation. Returns:
 the set of complexes which contains this primitive.

getComposite
@Association("Composition") @UML(identifier="composite", obligation=OPTIONAL, specification=ISO_19107) Composite getComposite()
Returns the owner of this primitive. This method is optional since the association in ISO 19107 is navigable only fromComposite
toPrimitive
, not the other way. Returns:
 the owner of this primitive, or
null
if the association is not available or not implemented that way.  See Also:
Composite.getGenerators()

getProxy
@Association("Oriented") @UML(identifier="proxy", obligation=CONDITIONAL, specification=ISO_19107) OrientablePrimitive[] getProxy()
Returns the orientable primitives associated with this primitive. EachPrimitive
of dimension 1 or 2 is associated to two orientable primitives, one for each possible orientation. For curves and surfaces, there are exactly two orientable primitives for each geometric object. For the positive orientation, the orientable primitive shall be the corresponding curve or surface.This method is mandatory for curves and
surfaces
, and is not allowed for Points and solids. The later should returnnull
. Returns:
 the orientable primitives as an array of length 2, or
null
if none.  See Also:
OrientablePrimitive.getPrimitive()

