org.openlowcode.design.data.properties.basic

Class ConstraintOnLinkMaxOneFromLeft

java.lang.Object

org.openlowcode.tools.misc.Named

org.openlowcode.design.data.PropertyBusinessRule<LinkObject<? super DataObjectDefinition,? super DataObjectDefinition>>

org.openlowcode.design.data.properties.basic.ConstraintOnLinkMaxOneFromLeft

All Implemented Interfaces:

NamedInterface

public class ConstraintOnLinkMaxOneFromLeft
extends PropertyBusinessRule<LinkObject<? super DataObjectDefinition,? super DataObjectDefinition>>

This constraint only allows one link from the left object. This is recommended to be used where there can be zero or one link, whereas LinkedToParent property imposes there is always one parent

Author:

Open Lowcode SAS

Constructor Summary

Constructors

Constructor and Description
ConstraintOnLinkMaxOneFromLeft(LinkObject<?,?> parentproperty, boolean replaceifmorethanone) creates a constraint allowing only one link from left

Method Summary

Modifier and Type	Method and Description
java.lang.String[]	getImportstatements()
LinkObject<?,?>	getParentproperty()
boolean	isReplaceifmorethanone()
void	writeInitialization(SourceGenerator sg)

Methods inherited from class org.openlowcode.design.data.PropertyBusinessRule

isUserimplemented

Methods inherited from class org.openlowcode.tools.misc.Named

changeName, cleanName, equals, getName

Methods inherited from class java.lang.Object

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

Constructor Detail

ConstraintOnLinkMaxOneFromLeft

public ConstraintOnLinkMaxOneFromLeft(LinkObject<?,?> parentproperty,
                                      boolean replaceifmorethanone)

creates a constraint allowing only one link from left

Parameters:

parentproperty - link object property

replaceifmorethanone - if true, if an old link existed, it will be removed, if false, if a link already exists, an error is thrown

Method Detail

writeInitialization

public void writeInitialization(SourceGenerator sg)
                         throws java.io.IOException

Specified by:

writeInitialization in class PropertyBusinessRule<LinkObject<? super DataObjectDefinition,? super DataObjectDefinition>>

Parameters:

sg - source generator

Throws:

java.io.IOException - if anything bad happens while writing the file

getImportstatements

public java.lang.String[] getImportstatements()

Specified by:

getImportstatements in class PropertyBusinessRule<LinkObject<? super DataObjectDefinition,? super DataObjectDefinition>>

Returns:

the list of import statements for the business rule

getParentproperty

public LinkObject<?,?> getParentproperty()

Returns:

get parent property

isReplaceifmorethanone

public boolean isReplaceifmorethanone()

Returns:

if true, if an old link existed, it will be removed, if false, if a link already exists, an error is thrown