Class EvaluationStrategies
- java.lang.Object
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- org.eclipse.rdf4j.query.algebra.evaluation.util.EvaluationStrategies
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public class EvaluationStrategies extends Object
Registry for currently activeEvaluationStrategy
objects. The internal registry uses soft references to allow entries to be garbage-collected when no longer used. Currently, the primary purpose of this is to support (de)serialization of objects (over the lifetime of the VM) that depend on an EvaluationStrategy- Author:
- Jeen Broekstra
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static EvaluationStrategy
get(UUID key)
Retrieve the EvaluationStrategy registered with the supplied key.static UUID
getKey(EvaluationStrategy strategy)
Retrieve the registry key for the given EvaluationStrategystatic UUID
register(EvaluationStrategy strategy)
Add a strategy to the registry and returns the registry key.
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Method Detail
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get
public static final EvaluationStrategy get(UUID key)
Retrieve the EvaluationStrategy registered with the supplied key.- Parameters:
key
- the key- Returns:
- the registered EvaluationStrategy, or
null
if no matching EvaluationStrategy can be found.
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getKey
public static final UUID getKey(EvaluationStrategy strategy)
Retrieve the registry key for the given EvaluationStrategy- Parameters:
strategy
- the EvaluationStrategy for which to retrieve the registry key- Returns:
- the registry key with which the supplied strategy can be retrieved, or
null
if the supplied strategy is not in the registry.
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register
public static final UUID register(EvaluationStrategy strategy)
Add a strategy to the registry and returns the registry key. If the strategy is already present, the operation simply returns the key with which it is currently registered.- Parameters:
strategy
- the EvaluationStrategy to register- Returns:
- the key with which the strategy is registered.
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