org.eigenbase.lurql
Class LurqlPlanVertex

java.lang.Object
  org.eigenbase.lurql.LurqlPlanVertex

public class LurqlPlanVertex
extends Object

LurqlPlanVertex is a vertex in a LURQL plan graph.

Version:

$Id: //open/dev/farrago/src/org/eigenbase/lurql/LurqlPlanVertex.java#1 $

Author:

John V. Sichi

Field Summary

private Set<JmiClassVertex>	classVertexSet Set of JmiClassVertex references corresponding to classes which need to be queried at this point in the plan.
private List<LurqlFilter>	filters All filters that apply at the given node
private String	name Name for this vertex (unique with respect to containing plan).
private LurqlPlan	plan Containing plan.
private LurqlPlanVertex	recursionRoot If non-null, the root of a recursive cycle.
private org.jgrapht.DirectedGraph<LurqlPlanVertex,LurqlPlanEdge>	recursionSubgraph If non-null, a subgraph of vertices which should be executed cyclically to implement dynamic recursion.
private boolean	recursive True if this vertex participates in a recursion execution cycle.
private Set<String>	rootObjectIds Set of object MofIds to use as roots.
private String	stringRep String representation of this vertex.
private Set<JmiClassVertex>	unmodifiableClassVertexSet Unmodifiable counterpart to classVertexSet (for public consumption).
private List<LurqlFilter>	unmodifiableFilters Unmodifiable counterpart to filters (for public consumption).
private String	var The alias assigned to this vertex in the parsed query, or null if none.

Constructor Summary

LurqlPlanVertex(LurqlPlan plan, String name, String alias, Set<String> rootObjectIds)

Method Summary

(package private) void	addClassVertex(JmiClassVertex classVertex)
(package private) void	addFilters(List<LurqlFilter> filters)
private String	computeStringRep()
(package private) org.jgrapht.DirectedGraph<LurqlPlanVertex,LurqlPlanEdge>	createReachableSubgraph(boolean setRecursive)
(package private) void	freeze()
String	getAlias()
Set<JmiClassVertex>	getClassVertexSet()
List<LurqlFilter>	getFilters()
String	getName()
LurqlPlanVertex	getRecursionRoot()
org.jgrapht.DirectedGraph<LurqlPlanVertex,LurqlPlanEdge>	getRecursionSubgraph()
Set<String>	getRootObjectIds()
boolean	isRecursive()
(package private) void	setRecursionRoot(LurqlPlanVertex recursionRoot)
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

plan

private final LurqlPlan plan

Containing plan.

name

private final String name

Name for this vertex (unique with respect to containing plan).

var

private final String var

The alias assigned to this vertex in the parsed query, or null if none.

classVertexSet

private Set<JmiClassVertex> classVertexSet

Set of JmiClassVertex references corresponding to classes which need to be queried at this point in the plan.

unmodifiableClassVertexSet

private Set<JmiClassVertex> unmodifiableClassVertexSet

Unmodifiable counterpart to classVertexSet (for public consumption).

filters

private final List<LurqlFilter> filters

All filters that apply at the given node

unmodifiableFilters

private final List<LurqlFilter> unmodifiableFilters

Unmodifiable counterpart to filters (for public consumption).

rootObjectIds

private final Set<String> rootObjectIds

Set of object MofIds to use as roots.

recursionRoot

private LurqlPlanVertex recursionRoot

If non-null, the root of a recursive cycle. We avoid creating an explicit graph edge to represent the cycle; instead, we use this "weak edge" and keep the graph structure acyclic.

recursionSubgraph

private org.jgrapht.DirectedGraph<LurqlPlanVertex,LurqlPlanEdge> recursionSubgraph

If non-null, a subgraph of vertices which should be executed cyclically to implement dynamic recursion.

recursive

private boolean recursive

True if this vertex participates in a recursion execution cycle.

stringRep

private String stringRep

String representation of this vertex.

Constructor Detail

LurqlPlanVertex

public LurqlPlanVertex(LurqlPlan plan,
                       String name,
                       String alias,
                       Set<String> rootObjectIds)

Method Detail

getName

public String getName()

getAlias

public String getAlias()

getRecursionSubgraph

public org.jgrapht.DirectedGraph<LurqlPlanVertex,LurqlPlanEdge> getRecursionSubgraph()

isRecursive

public boolean isRecursive()

getRecursionRoot

public LurqlPlanVertex getRecursionRoot()

setRecursionRoot

void setRecursionRoot(LurqlPlanVertex recursionRoot)

createReachableSubgraph

org.jgrapht.DirectedGraph<LurqlPlanVertex,LurqlPlanEdge> createReachableSubgraph(boolean setRecursive)

toString

public String toString()

Overrides:

toString in class Object

computeStringRep

private String computeStringRep()

getFilters

public List<LurqlFilter> getFilters()

getClassVertexSet

public Set<JmiClassVertex> getClassVertexSet()

getRootObjectIds

public Set<String> getRootObjectIds()

addClassVertex

void addClassVertex(JmiClassVertex classVertex)

addFilters

void addFilters(List<LurqlFilter> filters)

freeze

void freeze()