com.redhat.lightblue.assoc.iterators

Class First

java.lang.Object

com.redhat.lightblue.assoc.iterators.First

All Implemented Interfaces:

QueryPlanIterator, Serializable

public class First
extends Object
implements QueryPlanIterator, Serializable

Only iterates the first query plan

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
First()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	next() Modifies the query plan into a unique tree.
void	reset(QueryPlan qp) Construct a query plan iterator that operates on the given query plan

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

First

public First()

Method Detail

reset

public void reset(QueryPlan qp)

Construct a query plan iterator that operates on the given query plan

Specified by:

reset in interface QueryPlanIterator

next

public boolean next()

Description copied from interface: QueryPlanIterator

Modifies the query plan into a unique tree.

Specified by:

next in interface QueryPlanIterator

Returns:

If true, tne query plan is configured into a unique tree. If false, query plan is now returned back to its original state during iterator construction, and the iteration is expected to stop.