com.bigdata.rdf.graph

Interface IBinder<VS,ES,ST>

All Known Implementing Classes:

BinderBase

public interface IBinder<VS,ES,ST>

An interface that may be used to extract variable bindings for the vertices visited by the algorithm.

Author:

Bryan Thompson

Method Summary

Methods

Modifier and Type	Method and Description
List<org.openrdf.model.Value>	bind(org.openrdf.model.ValueFactory vf, IGASState<VS,ES,ST> state, org.openrdf.model.Value u, IVariable<?>[] outVars, IBindingSet bs) New multi-binding strategy allows binders to bind multiple values to a given output variable (multiplying the number of solutions by the number of bindings).
int	getIndex() The ordinal index of the variable that is bound by this IBinder.

Method Detail

getIndex

int getIndex()

The ordinal index of the variable that is bound by this IBinder. By convention, index ZERO is the vertex. Indices greater than ZERO are typically aspects of the state of the vertex.

bind

List<org.openrdf.model.Value> bind(org.openrdf.model.ValueFactory vf,
                                 IGASState<VS,ES,ST> state,
                                 org.openrdf.model.Value u,
                                 IVariable<?>[] outVars,
                                 IBindingSet bs)

New multi-binding strategy allows binders to bind multiple values to a given output variable (multiplying the number of solutions by the number of bindings).

Parameters:

vf - The ValueFactory used to create the return Value.

state - The IGASState.

u - The vertex.

outVars - The array of output variables.

bs - The current binding set. Can be used to conditionally bind values based on the current solution.

Returns:

The Value for that ordinal variable or null if there is no binding for that ordinal variable.