io.crate.metadata

Interface Signature.SignatureOperator

All Superinterfaces:

java.util.function.Function<java.util.List<DataType>,java.util.List<DataType>>, java.util.function.UnaryOperator<java.util.List<DataType>>

Enclosing class:

Signature

public static interface Signature.SignatureOperator
extends java.util.function.UnaryOperator<java.util.List<DataType>>

Method Summary

Modifier and Type	Method and Description
default Signature.SignatureOperator	and(Signature.SignatureOperator secondary) Adds a secondary operator to this operator, which is executed with the result of this operator if a match occurs.
default Signature.SignatureOperator	preCondition(java.util.function.Predicate<java.util.List<DataType>> predicate) Adds a precondition before the operator which should evaluate to true in order for the operator to be evaluated.

Methods inherited from interface java.util.function.UnaryOperator

identity

Methods inherited from interface java.util.function.Function

andThen, apply, compose

Method Detail

preCondition

default Signature.SignatureOperator preCondition(java.util.function.Predicate<java.util.List<DataType>> predicate)

Adds a precondition before the operator which should evaluate to true in order for the operator to be evaluated.

Parameters:

predicate - a predicate which represents the precondition

Returns:

a new operator with the predicate prepended

and

default Signature.SignatureOperator and(Signature.SignatureOperator secondary)

Adds a secondary operator to this operator, which is executed with the result of this operator if a match occurs.

Parameters:

secondary - the operator which will be evaluated with this operator's success result

Returns:

a new operator with the secondary appended