org.rhq.helpers.perftest.support.jpa
Class EntityDependencyGraph

java.lang.Object
  org.rhq.helpers.perftest.support.jpa.EntityDependencyGraph

public class EntityDependencyGraph
extends Object

Produces a graph of Nodes linked to each other by Edges. Each Node corresponds to a single JPA entity and each Edge between them corresponds to a single relationship between the JPA entities (i.e. one of OneToOne, OneToMany, ManyToOne or ManyToMany).

Author:

Lukas Krejci

Constructor Summary

EntityDependencyGraph()

Method Summary

Set<Node>	addEntities(Class<?>... entities) A convenience method to add a number of entities to the graph at once.
Set<Node>	addEntities(Collection<Class<?>> entities) A convenience method to add a number of entities to the graph at once.
Node	addEntity(Class<?> entity) Adds a single entity to the dependency graph and analyzes it.
Set<Node>	getAllNodes()
Set<Node>	getLeafNodes()
Node	getNode(Class<?> entityClass)
Set<Node>	getRootNodes()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

EntityDependencyGraph

public EntityDependencyGraph()

Method Detail

addEntity

public Node addEntity(Class<?> entity)

Adds a single entity to the dependency graph and analyzes it. This will cause all the dependent and depending entities to be included in the graph as well.

Parameters:

entity -

Returns:

the Node instance corresponding to the provided entity class or null if the class doesn't represent a JPA entity.

addEntities

public Set<Node> addEntities(Class<?>... entities)

A convenience method to add a number of entities to the graph at once.

Parameters:

entities -

Returns:

the set of nodes corresponding to the provided entities.

addEntities

public Set<Node> addEntities(Collection<Class<?>> entities)

A convenience method to add a number of entities to the graph at once.

Parameters:

entities -

Returns:

the set of nodes corresponding to the provided entities.

getAllNodes

public Set<Node> getAllNodes()

Returns:

all the nodes in the dependency graph

getNode

public Node getNode(Class<?> entityClass)

Parameters:

entityClass - the class of an entity

Returns:

the node from the dependency graph corresponding to the given class or null if such node is not present.

getRootNodes

public Set<Node> getRootNodes()

Returns:

all the nodes from the dependency graph with no parents (i.e. with no edges leading to them).

getLeafNodes

public Set<Node> getLeafNodes()

Returns:

all the nodes from the dependency graph with no children (i.e. no edges leading from them).

toString

public String toString()

Overrides:

toString in class Object