com.redhat.lightblue.eval

Class ListProjector

java.lang.Object

com.redhat.lightblue.eval.Projector

com.redhat.lightblue.eval.ListProjector

public class ListProjector
extends Projector

Constructor Summary

Constructors

Constructor and Description
ListProjector(ProjectionList l, Path ctxPath, FieldTreeNode ctx)

Method Summary

Methods

Modifier and Type	Method and Description
List<Projector>	getItems()
Projector	getNestedProjector() Returns the nested projector for this path *only if* project returns true.
Projection.Inclusion	project(Path p, QueryEvaluationContext ctx) Evaluate the list of projections backwards, so the first projection that decides about the inclusion of the field is the last projection specified in the list.

Methods inherited from class com.redhat.lightblue.eval.Projector

getInstance, getInstance, project

Methods inherited from class java.lang.Object

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

Constructor Detail

ListProjector

public ListProjector(ProjectionList l,
             Path ctxPath,
             FieldTreeNode ctx)

Method Detail

getNestedProjector

public Projector getNestedProjector()

Description copied from class: Projector

Returns the nested projector for this path *only if* project returns true. Nested projector is used to project array elements. When a nested projector exists, projection operation should use the nested projector to project array elements. May return null, which means to continue using existing projector (this).

Specified by:

getNestedProjector in class Projector

getItems

public List<Projector> getItems()

project

public Projection.Inclusion project(Path p,
                           QueryEvaluationContext ctx)

Evaluate the list of projections backwards, so the first projection that decides about the inclusion of the field is the last projection specified in the list.

Specified by:

project in class Projector

Parameters:

p - The absolute field path

ctx - Query evaluation context