How to create a " Comparable Specification" and "in Specification" in Spring-Data

[yunquanwang]

I see the Spring-Data's test case show the code to create Specification:

	private static <T> Specification<T> simplePropertySpec(final String property, final Object value) {

		return new Specification<T>() {

			public Predicate toPredicate(Root<T> root, CriteriaQuery<?> query, CriteriaBuilder builder) {

				return builder.equal(root.get(property), value);
			}
		};
	}

public static Specification<User> userHasFirstnameLike(final String expression) {

		return new Specification<User>() {

			public Predicate toPredicate(Root<User> root, CriteriaQuery<?> query, CriteriaBuilder cb) {

				return cb.like(root.get("firstname").as(String.class), String.format("%%%s%%", expression));
			}
		};
	}

Question :
How can i buld Specification like this :

	private static <T> Specification<T> greaterThan(final String property, final Object value) {

		return new Specification<T>() {

			public Predicate toPredicate(Root<T> root, CriteriaQuery<?> query, CriteriaBuilder builder) {
                                                  //How to return greeterThan Specification ,Eg: property (age) value(26)
                                                 // and in  Specification 
                                 // return builder.greaterThan 		
	}
		};
	}

I wait you answer online!

[yunquanwang]

By the way
I want to create a common method to build the Specification to a query page