org.modeshape.graph.query.optimize
Class ReplaceAliases

java.lang.Object
  extended by org.modeshape.graph.query.optimize.ReplaceAliases
All Implemented Interfaces:
OptimizerRule

@Immutable
public class ReplaceAliases
extends Object
implements OptimizerRule

An optimizer rule that changes any nodes that make use of an alias for a SOURCE, including columns, including criteria, project nodes, etc. This behavior is similar to what ReplaceViews does with views that are given aliases.


Field Summary
static ReplaceAliases INSTANCE
           
 
Constructor Summary
ReplaceAliases()
           
 
Method Summary
 PlanNode execute(QueryContext context, PlanNode plan, LinkedList<OptimizerRule> ruleStack)
          Optimize the supplied plan using the supplied context, hints, and yet-to-be-run rules.
 String toString()
          
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

INSTANCE

public static final ReplaceAliases INSTANCE
Constructor Detail

ReplaceAliases

public ReplaceAliases()
Method Detail

execute

public PlanNode execute(QueryContext context,
                        PlanNode plan,
                        LinkedList<OptimizerRule> ruleStack)
Optimize the supplied plan using the supplied context, hints, and yet-to-be-run rules.

Specified by:
execute in interface OptimizerRule
Parameters:
context - the context in which the query is being optimized; never null
plan - the plan to be optimized; never null
ruleStack - the stack of rules that will be run after this rule; never null
Returns:
the optimized plan; never null
See Also:
OptimizerRule.execute(org.modeshape.graph.query.QueryContext, org.modeshape.graph.query.plan.PlanNode, java.util.LinkedList)

toString

public String toString()

Overrides:
toString in class Object
See Also:
Object.toString()


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