org.apache.openjpa.persistence.criteria
Interface AliasContext

All Known Implementing Classes:

CriteriaQueryImpl

interface AliasContext

The context holds named variables for nodes of CriteriaQuery. Can create unique alias for the nodes that has not been aliased explicitly.

Since:

2.0.0

Author:

Pinaki Poddar

Method Summary

String	getAlias(Selection<?> node) Gets the alias for the given node.
Value	getRegisteredRootVariable(Root<?> node) Gets the registered root variable for the given node.
Value	getRegisteredValue(Selection<?> node) Gets the registered path value for the given node.
Value	getRegisteredVariable(Selection<?> node) Gets the registered variable for the given node.
boolean	isRegistered(Selection<?> node) Affirms if the given node has been registered.
void	registerVariable(Selection<?> node, Value variable, Value path) Register the given variable of corresponding given value against the given node.

Method Detail

getAlias

String getAlias(Selection<?> node)

Gets the alias for the given node. If no alias is set on the given node then create an alias, assign it to the node.

registerVariable

void registerVariable(Selection<?> node,
                      Value variable,
                      Value path)

Register the given variable of corresponding given value against the given node.

Parameters:

node - of query tree

variable - must be a variable

value - path value

isRegistered

boolean isRegistered(Selection<?> node)

Affirms if the given node has been registered.

getRegisteredVariable

Value getRegisteredVariable(Selection<?> node)

Gets the registered variable for the given node. Return null if the node is not registered.

getRegisteredRootVariable

Value getRegisteredRootVariable(Root<?> node)

Gets the registered root variable for the given node. Return null if the node is not registered.

getRegisteredValue

Value getRegisteredValue(Selection<?> node)

Gets the registered path value for the given node. Return null if the node is not registered.