org.qedeq.kernel.bo.logic.common
Interface IdentityOperatorExistenceChecker

All Known Subinterfaces:

ExistenceChecker, ModuleConstantsExistenceChecker

All Known Implementing Classes:

DefaultExistenceChecker, EverythingExists, ModuleConstantsExistenceCheckerImpl

public interface IdentityOperatorExistenceChecker

Check if the predicate for identity is already defined.

Author:

Michael Meyling

Method Summary

java.lang.String	getIdentityOperator() Get identity operator.
boolean	identityOperatorExists() Check if the identity operator is already defined.

Method Detail

identityOperatorExists

boolean identityOperatorExists()

Check if the identity operator is already defined.

Returns:

Identity operator is already defined.

getIdentityOperator

java.lang.String getIdentityOperator()

Get identity operator. This is the operator string of a predicate.

Returns:

Identity operator. Should be null if !identityOperatorExists().