com.impetus.kundera.graph

Class GraphGenerator

java.lang.Object

com.impetus.kundera.graph.GraphGenerator

public final class GraphGenerator
extends Object

Author:

vivek.mishra Responsible for: 1. Do pre-checks a) validation entity b) set id c) check for shared via primary key { on parse relation } d) dirty check { on associated and self entity } 2. Parse through relations and relational objects. 3. Recursively process transitive relations

Field Summary

Fields

Modifier and Type	Field and Description
private GraphBuilder	builder
(package private) Set<Node>	traversedNodes
private PersistenceValidator	validator

Constructor Summary

Constructors

Constructor and Description
GraphGenerator()

Method Summary

Methods

Modifier and Type	Method and Description
private void	assignNodeLinkProperty(Node node, Relation relation, Node childNode) On assigning node link properties
(package private) <E> Node	generate(E entity, PersistenceDelegator delegator, PersistenceCache pc, NodeState state) Generate graph for head node.
<E> ObjectGraph	generateGraph(E entity, PersistenceDelegator delegator) Generate entity graph and returns after assigning headnode.
<E> ObjectGraph	generateGraph(E entity, PersistenceDelegator delegator, NodeState state) Generate entity graph and returns after assigning headnode.
private Map<NodeLink.LinkProperty,Object>	getLinkProperties(EntityMetadata metadata, Relation relation, EntityManagerFactoryImpl.KunderaMetadata kunderaMetadata)
(package private) void	onBuildChildNode(Object childObject, EntityMetadata childMetadata, PersistenceDelegator delegator, PersistenceCache pc, Node node, Relation relation) On building child node
private Object	onIfSharedByPK(Relation relation, Object childObject, EntityMetadata childMetadata, Object entityId) Check and set if relation is set via primary key.
private <E> Object	onPreChecks(E entity, PersistenceDelegator delegator) On pre checks before generating graph.
(package private) void	setLink(Node node, Relation relation, Node childNode, NodeLink nodeLink) Set link property
private <E> Node	traverseNode(E entity, PersistenceDelegator delegator, PersistenceCache pc, Object entityId, Node node)

Methods inherited from class java.lang.Object

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

Field Detail

builder

private GraphBuilder builder

traversedNodes

Set<Node> traversedNodes

validator

private PersistenceValidator validator

Constructor Detail

GraphGenerator

public GraphGenerator()

Method Detail

generateGraph

public <E> ObjectGraph generateGraph(E entity,
                            PersistenceDelegator delegator)

Generate entity graph and returns after assigning headnode. n

Parameters:

entity - entity.

delegator - delegator

pc - persistence cache

Returns:

object graph.

generateGraph

public <E> ObjectGraph generateGraph(E entity,
                            PersistenceDelegator delegator,
                            NodeState state)

Generate entity graph and returns after assigning headnode. n

Parameters:

entity - entity.

delegator - delegator

pc - persistence cache

Returns:

object graph.

generate

<E> Node generate(E entity,
                PersistenceDelegator delegator,
                PersistenceCache pc,
                NodeState state)

Generate graph for head node.

traverse through it's relational entities recursively

Parameters:

entity - entity object

delegator - delegator object

pc - persistence cache

Returns:

head node

traverseNode

private <E> Node traverseNode(E entity,
                    PersistenceDelegator delegator,
                    PersistenceCache pc,
                    Object entityId,
                    Node node)

onIfSharedByPK

private Object onIfSharedByPK(Relation relation,
                    Object childObject,
                    EntityMetadata childMetadata,
                    Object entityId)

Check and set if relation is set via primary key.

Parameters:

relation - relation

childObject - target entity

childMetadata - target entity metadata

entityId - entity id

Returns:

target entity.

onPreChecks

private <E> Object onPreChecks(E entity,
                     PersistenceDelegator delegator)

On pre checks before generating graph. performed checks:

Check if entity is valid. generated and set id in case GeneratedValue is present and not set. Check if primary key is not null.