Package org.apache.tinkerpop.gremlin.process.traversal.strategy.verification

Class LambdaRestrictionStrategy

java.lang.Object

org.apache.tinkerpop.gremlin.process.traversal.strategy.AbstractTraversalStrategy<TraversalStrategy.VerificationStrategy>

org.apache.tinkerpop.gremlin.process.traversal.strategy.verification.LambdaRestrictionStrategy

All Implemented Interfaces:

Serializable, Comparable<Class<? extends TraversalStrategy>>, TraversalStrategy<TraversalStrategy.VerificationStrategy>, TraversalStrategy.VerificationStrategy

public final class LambdaRestrictionStrategy
extends AbstractTraversalStrategy<TraversalStrategy.VerificationStrategy>
implements TraversalStrategy.VerificationStrategy

LambdaRestrictionStrategy does not allow lambdas to be used in a Traversal. The contents of a lambda cannot be analyzed/optimized and thus, reduces the ability of other TraversalStrategy instances to reason about the traversal. This strategy is not activated by default. However, graph system providers may choose to make this a default strategy in order to ensure their respective strategies are better able to operate.

Author:

Marko A. Rodriguez (http://markorodriguez.com)

See Also:

• Serialized Form

Example:

 __.out().map(v -> v.get().value("name"))           // throws an IllegalStateException
 __.out().filter(v -> v.bulk() > 2)              // throws an IllegalStateException
 __.choose(v -> v.sack() == 1,out(),in())           // throws an IllegalStateException
 __.select().by(v -> v.get().id())                  // throws an IllegalStateException
 __.order().by(a,b -> a > b)                        // throws an IllegalStateException
 

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy

TraversalStrategy.DecorationStrategy, TraversalStrategy.FinalizationStrategy, TraversalStrategy.OptimizationStrategy, TraversalStrategy.ProviderOptimizationStrategy, TraversalStrategy.VerificationStrategy

Method Summary

Modifier and Type	Method	Description
void	apply(Traversal.Admin<?,?> traversal)	The transformation the strategy applies to the traversal.
static LambdaRestrictionStrategy	instance()

Methods inherited from class org.apache.tinkerpop.gremlin.process.traversal.strategy.AbstractTraversalStrategy

equals, hashCode, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy

applyPost, applyPrior, getConfiguration

Methods inherited from interface org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy.VerificationStrategy

compareTo, getTraversalCategory

Method Details

apply

public void apply(Traversal.Admin<?,?> traversal)

Description copied from interface: TraversalStrategy

The transformation the strategy applies to the traversal.

Specified by:

apply in interface TraversalStrategy<TraversalStrategy.VerificationStrategy>

instance

public static LambdaRestrictionStrategy instance()