QueryValueEvaluationStep.Fail (Eclipse RDF4J 4.3.2)

java.lang.Object
- org.eclipse.rdf4j.query.algebra.evaluation.QueryValueEvaluationStep.Fail

All Implemented Interfaces:

QueryValueEvaluationStep

Enclosing interface:

QueryValueEvaluationStep
```
public static final class QueryValueEvaluationStep.Fail
extends Object
implements QueryValueEvaluationStep
```
A minimal implementation that falls is known to throw an ValueExprEvaluationException. This can't be a constant as the downstream code needs to catch and deal with it and that needs re-evaluation.

- Nested Class Summary
  - Nested classes/interfaces inherited from interface org.eclipse.rdf4j.query.algebra.evaluation.QueryValueEvaluationStep
    QueryValueEvaluationStep.ApplyFunctionForEachBinding, QueryValueEvaluationStep.ConstantQueryValueEvaluationStep, QueryValueEvaluationStep.Fail, QueryValueEvaluationStep.Minimal
- Constructor Summary
  
  Constructors
  Constructor Description
  
  Fail(String message)
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  Value evaluate(BindingSet bindings)
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
  - Methods inherited from interface org.eclipse.rdf4j.query.algebra.evaluation.QueryValueEvaluationStep
    isConstant

Constructor Detail
- Fail
```
public Fail(String message)
```

Method Detail

evaluate

public Value evaluate(BindingSet bindings)
               throws ValueExprEvaluationException,
                      QueryEvaluationException

Specified by:: evaluate in interface QueryValueEvaluationStep
Throws:: ValueExprEvaluationException; QueryEvaluationException