Package sk.iway.iwcm.database.nestedsets

Class JpaNestedSetManager

java.lang.Object

sk.iway.iwcm.database.nestedsets.JpaNestedSetManager

All Implemented Interfaces:

NestedSetManager

public class JpaNestedSetManager
extends Object
implements NestedSetManager

Constructor Summary

Constructors

Constructor	Description
JpaNestedSetManager(org.eclipse.persistence.jpa.JpaEntityManager em)

Method Summary

Modifier and Type	Method	Description
<T extends NodeInfo> void	buildTree(List<Node<T>> treeList, int maxLevel)	Establishes all parent/child/ancestor/descendant relationships of all the nodes in the given list.
void	clear()	Clears the NestedSetManager, removing all managed nodes from the NestedSetManager.
<T extends NodeInfo> Node<T>	createRoot(T root)	Creates a root node for the given NodeInfo instance.
<T extends NodeInfo> Node<T>	fetchTree(Class<T> clazz, org.eclipse.persistence.expressions.Expression filtrationCriteria, T parent)	Fetches the complete tree, returning the root node of the tree.
<T extends NodeInfo> Node<T>	fetchTree(Class<T> clazz, org.eclipse.persistence.expressions.Expression filtrationCriteria, T parent, int rootId)	Fetches a complete tree, returning the root node of the tree.
<T extends NodeInfo> List<Node<T>>	fetchTreeAsList(Class<T> clazz, org.eclipse.persistence.expressions.Expression filtrationCriteria, T parent)	Fetches a complete tree and returns the tree as a list.
<T extends NodeInfo> List<Node<T>>	fetchTreeAsList(Class<T> clazz, org.eclipse.persistence.expressions.Expression filtrationCriteria, T parent, int rootId)	Fetches a complete tree and returns the tree as a list.
Configuration	getConfig(Class<?> clazz)	INTERNAL: Gets the nestedset configuration for the given class.
org.eclipse.persistence.jpa.JpaEntityManager	getEntityManager()	Gets the EntityManager used by this NestedSetManager.
<T extends NodeInfo> Node<T>	getNode(T nodeInfo)	Gets the node that represents the given NodeInfo instance in the tree.
Collection<Node<?>>	getNodes()	Gets a collection of all nodes currently managed by the NestedSetManager.
<T extends NodeInfo> void	update(Node<T> node)
<T extends NodeInfo> void	update(T nodeInfo)

Methods inherited from class java.lang.Object

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

Constructor Details

JpaNestedSetManager

public JpaNestedSetManager(org.eclipse.persistence.jpa.JpaEntityManager em)

Method Details

getEntityManager

public org.eclipse.persistence.jpa.JpaEntityManager getEntityManager()

Gets the EntityManager used by this NestedSetManager.

Specified by:

getEntityManager in interface NestedSetManager

Returns:

The EntityManager.

clear

public void clear()

Clears the NestedSetManager, removing all managed nodes from the NestedSetManager. Any entities wrapped by such nodes are not detached from the underlying EntityManager.

Specified by:

clear in interface NestedSetManager

getNodes

public Collection<Node<?>> getNodes()

Gets a collection of all nodes currently managed by the NestedSetManager.

Specified by:

getNodes in interface NestedSetManager

Returns:

The collection of nodes.

fetchTreeAsList

public <T extends NodeInfo> List<Node<T>> fetchTreeAsList(Class<T> clazz,
 org.eclipse.persistence.expressions.Expression filtrationCriteria,
 T parent)

Fetches a complete tree and returns the tree as a list.

Specified by:

fetchTreeAsList in interface NestedSetManager

Returns:

The tree in form of a list, starting with the root node.

fetchTreeAsList

public <T extends NodeInfo> List<Node<T>> fetchTreeAsList(Class<T> clazz,
 org.eclipse.persistence.expressions.Expression filtrationCriteria,
 T parent,
 int rootId)

Fetches a complete tree and returns the tree as a list.

Specified by:

fetchTreeAsList in interface NestedSetManager

Returns:

The tree in form of a list, starting with the root node.

fetchTree

public <T extends NodeInfo> Node<T> fetchTree(Class<T> clazz,
 org.eclipse.persistence.expressions.Expression filtrationCriteria,
 T parent,
 int rootId)

Fetches a complete tree, returning the root node of the tree.

Specified by:

fetchTree in interface NestedSetManager

Returns:

The root node of the tree.

fetchTree

public <T extends NodeInfo> Node<T> fetchTree(Class<T> clazz,
 org.eclipse.persistence.expressions.Expression filtrationCriteria,
 T parent)

Description copied from interface: NestedSetManager

Fetches the complete tree, returning the root node of the tree.

Specified by:

fetchTree in interface NestedSetManager

Returns:

The root node of the tree.

buildTree

public <T extends NodeInfo> void buildTree(List<Node<T>> treeList,
 int maxLevel)

Establishes all parent/child/ancestor/descendant relationships of all the nodes in the given list. As a result, invocations on the corresponding methods on these node instances will not trigger any database queries.

Type Parameters:

T -

Parameters:

treeList -

maxLevel -

createRoot

public <T extends NodeInfo> Node<T> createRoot(T root)

Creates a root node for the given NodeInfo instance.

Specified by:

createRoot in interface NestedSetManager

Returns:

The created node instance.

getNode

public <T extends NodeInfo> Node<T> getNode(T nodeInfo)

Gets the node that represents the given NodeInfo instance in the tree.

Specified by:

getNode in interface NestedSetManager

Returns:

The node.

getConfig

public Configuration getConfig(Class<?> clazz)

INTERNAL: Gets the nestedset configuration for the given class.

Specified by:

getConfig in interface NestedSetManager

Parameters:

clazz -

Returns:

The configuration.

update

public <T extends NodeInfo> void update(Node<T> node)

Specified by:

update in interface NestedSetManager

update

public <T extends NodeInfo> void update(T nodeInfo)

Specified by:

update in interface NestedSetManager