001 002package com.commercetools.api.predicates.query; 003 004import java.util.function.Function; 005 006public interface EmptyPredicateBuilder<T> { 007 BinaryQueryPredicate predicate(); 008 009 Function<QueryPredicate, CombinationQueryPredicate<T>> combinationFn(); 010 011 /** 012 * creates predicate to check that an array is empty 013 * @return a combination predicate 014 */ 015 default CombinationQueryPredicate<T> isEmpty() { 016 return combinationFn().apply( 017 predicate().operator(PredicateOperator.IS.toString()).right(ConstantQueryPredicate.of().constant("empty"))); 018 } 019}