StageGenerator (Apache Jena ARQ)

All Known Implementing Classes:

StageGeneratorGeneric, StageGeneratorGenericStar
```
public interface StageGenerator
```
Interface for execution of a basic graph pattern. A StageGenerator is registered in the context of an query execution to be found and called by the StageBuilder. The StageGenerator is called repeated for a basic graph pattern with each possible bindings unused to instantiate variables where possible. Each call of a stage generator returns a QueryIterator of solutions to the pattern for each of the possibilities (bindings) from the input query iterator. Result bindings to a particular input binding should use that as their parent, to pick up the variable bounds for that particular input.

See Also:

StageBuilder

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`QueryIterator`	`execute(BasicPattern pattern, QueryIterator input, ExecutionContext execCxt)`

Method Detail

execute

QueryIterator execute(BasicPattern pattern,
                      QueryIterator input,
                      ExecutionContext execCxt)