All Known Implementing Classes:

BoundaryNodeRule.EndPointBoundaryNodeRule, BoundaryNodeRule.Mod2BoundaryNodeRule, BoundaryNodeRule.MonoValentEndPointBoundaryNodeRule, BoundaryNodeRule.MultiValentEndPointBoundaryNodeRule
```
public interface BoundaryNodeRule
```
An interface for rules which determine whether node points which are in boundaries of Lineal geometry components are in the boundary of the parent geometry collection. The SFS specifies a single kind of boundary node rule, the BoundaryNodeRule.Mod2BoundaryNodeRule rule. However, other kinds of Boundary Node Rules are appropriate in specific situations (for instance, linear network topology usually follows the BoundaryNodeRule.EndPointBoundaryNodeRule.) Some JTS operations (such as RelateOp, BoundaryOp and IsSimpleOp) allow the BoundaryNodeRule to be specified, and respect the supplied rule when computing the results of the operation.
An example use case for a non-SFS-standard Boundary Node Rule is that of checking that a set of LineStrings have valid linear network topology, when turn-arounds are represented as closed rings. In this situation, the entry road to the turn-around is only valid when it touches the turn-around ring at the single (common) endpoint. This is equivalent to requiring the set of LineStrings to be simple under the BoundaryNodeRule.EndPointBoundaryNodeRule. The SFS-standard BoundaryNodeRule.Mod2BoundaryNodeRule is not sufficient to perform this test, since it states that closed rings have no boundary points.
This interface and its subclasses follow the Strategy design pattern.

See Also:

RelateOp, BoundaryOp, IsSimpleOp, PointLocator

Nested Class Summary

Nested Classes
Modifier and Type	Interface	Description
`static class`	`BoundaryNodeRule.EndPointBoundaryNodeRule`	A `BoundaryNodeRule` which specifies that any points which are endpoints of lineal components are in the boundary of the parent geometry.
`static class`	`BoundaryNodeRule.Mod2BoundaryNodeRule`	A `BoundaryNodeRule` specifies that points are in the boundary of a lineal geometry iff the point lies on the boundary of an odd number of components.
`static class`	`BoundaryNodeRule.MonoValentEndPointBoundaryNodeRule`	A `BoundaryNodeRule` which determines that only endpoints with valency of exactly 1 are on the boundary.
`static class`	`BoundaryNodeRule.MultiValentEndPointBoundaryNodeRule`	A `BoundaryNodeRule` which determines that only endpoints with valency greater than 1 are on the boundary.

Field Summary

Fields
Modifier and Type	Field	Description
`static BoundaryNodeRule`	`ENDPOINT_BOUNDARY_RULE`	The Endpoint Boundary Node Rule.
`static BoundaryNodeRule`	`MOD2_BOUNDARY_RULE`	The Mod-2 Boundary Node Rule (which is the rule specified in the OGC SFS).
`static BoundaryNodeRule`	`MONOVALENT_ENDPOINT_BOUNDARY_RULE`	The Monovalent Endpoint Boundary Node Rule.
`static BoundaryNodeRule`	`MULTIVALENT_ENDPOINT_BOUNDARY_RULE`	The MultiValent Endpoint Boundary Node Rule.
`static BoundaryNodeRule`	`OGC_SFS_BOUNDARY_RULE`	The Boundary Node Rule specified by the OGC Simple Features Specification, which is the same as the Mod-2 rule.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`isInBoundary(int boundaryCount)`	Tests whether a point that lies in `boundaryCount` geometry component boundaries is considered to form part of the boundary of the parent geometry.

- Field Detail
  - MOD2_BOUNDARY_RULE
```
static final BoundaryNodeRule MOD2_BOUNDARY_RULE
```
    The Mod-2 Boundary Node Rule (which is the rule specified in the OGC SFS).
    
    See Also:
    
    BoundaryNodeRule.Mod2BoundaryNodeRule
  - ENDPOINT_BOUNDARY_RULE
```
static final BoundaryNodeRule ENDPOINT_BOUNDARY_RULE
```
    The Endpoint Boundary Node Rule.
    
    See Also:
    
    BoundaryNodeRule.EndPointBoundaryNodeRule
  - MULTIVALENT_ENDPOINT_BOUNDARY_RULE
```
static final BoundaryNodeRule MULTIVALENT_ENDPOINT_BOUNDARY_RULE
```
    The MultiValent Endpoint Boundary Node Rule.
    
    See Also:
    
    BoundaryNodeRule.MultiValentEndPointBoundaryNodeRule
  - MONOVALENT_ENDPOINT_BOUNDARY_RULE
```
static final BoundaryNodeRule MONOVALENT_ENDPOINT_BOUNDARY_RULE
```
    The Monovalent Endpoint Boundary Node Rule.
    
    See Also:
    
    BoundaryNodeRule.MonoValentEndPointBoundaryNodeRule
  - OGC_SFS_BOUNDARY_RULE
```
static final BoundaryNodeRule OGC_SFS_BOUNDARY_RULE
```
    The Boundary Node Rule specified by the OGC Simple Features Specification, which is the same as the Mod-2 rule.
    
    See Also:
    
    BoundaryNodeRule.Mod2BoundaryNodeRule
- Method Detail
  - isInBoundary
```
boolean isInBoundary(int boundaryCount)
```
    Tests whether a point that lies in boundaryCount geometry component boundaries is considered to form part of the boundary of the parent geometry.
    
    Parameters:
    
    boundaryCount - the number of component boundaries that this point occurs in
    
    Returns:
    
    true if points in this number of boundaries lie in the parent boundary

Interface BoundaryNodeRule

Nested Class Summary

Field Summary

Method Summary

Field Detail

MOD2_BOUNDARY_RULE

ENDPOINT_BOUNDARY_RULE

MULTIVALENT_ENDPOINT_BOUNDARY_RULE

MONOVALENT_ENDPOINT_BOUNDARY_RULE

OGC_SFS_BOUNDARY_RULE

Method Detail

isInBoundary