org.neo4j.graphdb.schema

Interface ConstraintDefinition

public interface ConstraintDefinition

Definition of a constraint. Note: This interface is going to be changed/removed in next major release to better cope with node and relationship constraints which are quite different concepts.

Method Summary

Modifier and Type	Method and Description
void	drop() Drops this constraint.
ConstraintType	getConstraintType()
Label	getLabel() This accessor method returns a label which this constraint is associated with if this constraint has type ConstraintType.UNIQUENESS or ConstraintType.NODE_PROPERTY_EXISTENCE.
Iterable<String>	getPropertyKeys()
RelationshipType	getRelationshipType() This accessor method returns a relationship type which this constraint is associated with if this constraint has type ConstraintType.UNIQUENESS or ConstraintType.NODE_PROPERTY_EXISTENCE.
boolean	isConstraintType(ConstraintType type)

Method Detail

getLabel

Label getLabel()

This accessor method returns a label which this constraint is associated with if this constraint has type ConstraintType.UNIQUENESS or ConstraintType.NODE_PROPERTY_EXISTENCE. Type of the constraint can be examined by calling getConstraintType() or isConstraintType(ConstraintType) methods.

Returns:

the Label this constraint is associated with.

Throws:

IllegalStateException - when this constraint is associated with relationships.

getRelationshipType

RelationshipType getRelationshipType()

This accessor method returns a relationship type which this constraint is associated with if this constraint has type ConstraintType.UNIQUENESS or ConstraintType.NODE_PROPERTY_EXISTENCE. Type of the constraint can be examined by calling getConstraintType() or isConstraintType(ConstraintType) methods.

Returns:

the RelationshipType this constraint is associated with.

Throws:

IllegalStateException - when this constraint is associated with nodes.

getPropertyKeys

Iterable<String> getPropertyKeys()

Returns:

the property keys this constraint is about.

drop

void drop()

Drops this constraint.

getConstraintType

ConstraintType getConstraintType()

Returns:

the ConstraintType of constraint.

isConstraintType

boolean isConstraintType(ConstraintType type)

Parameters:

type - a constraint type

Returns:

true if this constraint definition's type is equal to the provided type