org.openlowcode.server.data.properties.constraints

Class ConstraintOnLinkObject<E extends DataObject<E>,F extends DataObject<F>>

java.lang.Object

org.openlowcode.server.data.properties.constraints.ConstraintOnLinkObject<E,F>

Type Parameters:

E - the left object

F - the right object

G - any type relevant to the control

Direct Known Subclasses:

ConstraintOnLinkedObjectSimilarAttribute

public abstract class ConstraintOnLinkObject<E extends DataObject<E>,F extends DataObject<F>>
extends java.lang.Object

A constraint on link object restrains the right objects that can be linked to a left object.

Author:

Open Lowcode SAS

Constructor Summary

Constructors

Constructor and Description
ConstraintOnLinkObject()

Method Summary

Modifier and Type	Method and Description
abstract boolean	checklinkvalid(DataObjectId<E> leftobject, DataObjectId<F> rightobject) checks if it is authorized to set a link between two objects with their id
abstract boolean	checklinkvalid(E leftobject, F rightobject) checks if it is authorized to set a link between two objects
abstract void	enrichRightObjectAfterCreation(F rightobjectbeforecreation, E leftobject) this method will enrich the right object after it has been created in case right objects are created when loading links
abstract QueryCondition	generateQueryFilter(TableAlias maintablealias, DataObjectId<E> leftobjectid) generates a filter to show only valid objects when querying for potential right objects
abstract QueryCondition	generateReverseQueryFilter(TableAlias maintablealias, DataObjectId<F> rightobjectid) generates a filter to show only valid objects when querying for potential left objects
abstract java.lang.String	getInvalidLinkErrorMessage(E leftobject, F rightobject) gets a detailed error message if link is invalid
abstract boolean	isLeftForLinkLoaderManaged() checks if the constraint allows to load links

Methods inherited from class java.lang.Object

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

Constructor Detail

ConstraintOnLinkObject

public ConstraintOnLinkObject()

Method Detail

checklinkvalid

public abstract boolean checklinkvalid(DataObjectId<E> leftobject,
                                       DataObjectId<F> rightobject)

checks if it is authorized to set a link between two objects with their id

Parameters:

leftobject - id of the left object

rightobject - if of the right object

Returns:

true if link creation is authorized, false if link creation is not authorized

checklinkvalid

public abstract boolean checklinkvalid(E leftobject,
                                       F rightobject)

checks if it is authorized to set a link between two objects

Parameters:

leftobject - left object

rightobject - right object

Returns:

true if link creation is authorized, false if link creation is not authorized

getInvalidLinkErrorMessage

public abstract java.lang.String getInvalidLinkErrorMessage(E leftobject,
                                                            F rightobject)

gets a detailed error message if link is invalid

Parameters:

leftobject - left object

rightobject - right object

Returns:

a readable error message

generateQueryFilter

public abstract QueryCondition generateQueryFilter(TableAlias maintablealias,
                                                   DataObjectId<E> leftobjectid)

generates a filter to show only valid objects when querying for potential right objects

Parameters:

maintablealias - alias to generate the condition for

leftobjectid - id of the left object

Returns:

a query condition that will return only valid left objects for link creation

generateReverseQueryFilter

public abstract QueryCondition generateReverseQueryFilter(TableAlias maintablealias,
                                                          DataObjectId<F> rightobjectid)

generates a filter to show only valid objects when querying for potential left objects

Parameters:

maintablealias - alias to generate the condition for

rightobjectid - id of the right object

Returns:

a query condition that will return only valid left objects for link creation

isLeftForLinkLoaderManaged

public abstract boolean isLeftForLinkLoaderManaged()

checks if the constraint allows to load links

Returns:

true if it is authorized to use left for link loader with this constraint

enrichRightObjectAfterCreation

public abstract void enrichRightObjectAfterCreation(F rightobjectbeforecreation,
                                                    E leftobject)

this method will enrich the right object after it has been created in case right objects are created when loading links

Parameters:

rightobjectbeforecreation - to be implemented if isLeftForLinkLoaderManaged returns true.

leftobject - left object to enrich data