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java.lang.Objectorg.objectweb.medor.eval.lib.UnaryIteratifNodeEvaluator
Constructor Summary | |
UnaryIteratifNodeEvaluator(QueryNode query,
NodeEvaluator subNodeEvaluator)
|
Method Summary | |
TupleCollection |
fetchData(ParameterOperand[] parameters)
This method executes the query on the underlying node. |
long |
getCacheSize()
|
QueryNode |
getQueryNode()
Returns the QueryNode to which the NodeEvaluator is attached. |
boolean |
linkChildren()
Opens the links between the current NodeEvaluator and the NodeEvaluators of the children QueryTrees for pipelining operations. |
void |
setCacheSize(long cacheSize)
|
void |
setPrefetchBuffer(PrefetchBuffer pb)
Associates a PrefetchBuffer to be filled by the collection computed by this evaluator. |
boolean |
unlinkChildren()
Closes the links between the current NodeEvaluator and the NodeEvaluators of the children QueryTrees for pipelining operations. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public UnaryIteratifNodeEvaluator(QueryNode query, NodeEvaluator subNodeEvaluator)
Method Detail |
public boolean linkChildren()
NodeEvaluator
linkChildren
in interface NodeEvaluator
public boolean unlinkChildren()
NodeEvaluator
unlinkChildren
in interface NodeEvaluator
public TupleCollection fetchData(ParameterOperand[] parameters) throws MedorException
NodeEvaluator
fetchData
in interface NodeEvaluator
MedorException
public void setPrefetchBuffer(PrefetchBuffer pb) throws MedorException
NodeEvaluator
setPrefetchBuffer
in interface NodeEvaluator
pb
- The PrefetchBuffer to be filled.
MedorException
public long getCacheSize()
getCacheSize
in interface NodeEvaluator
public void setCacheSize(long cacheSize)
setCacheSize
in interface NodeEvaluator
public QueryNode getQueryNode()
NodeEvaluator
getQueryNode
in interface NodeEvaluator
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