com.github.aqiu202.starters.jpa.query.Spec Maven / Gradle / Ivy
package com.github.aqiu202.starters.jpa.query;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;
import org.springframework.data.jpa.domain.Specification;
/**
* 自定义Specification实现用于辅助sql编程
*
* @author AQIU
* @version 创建时间：2018年4月26日 下午6:03:08
*/
public class Spec implements Specification {
/**
*
*/
private static final long serialVersionUID = 1L;
private AnonymousPredicateBuilder anonymousPredicateBuilder;
private Spec(AnonymousPredicateBuilder anonymousPredicateBuilder) {
this.anonymousPredicateBuilder = anonymousPredicateBuilder;
}
public static Spec of(AnonymousPredicateBuilder anonymousPredicateBuilder) {
return new Spec<>(anonymousPredicateBuilder);
}
@Override
public Predicate toPredicate(Root root, CriteriaQuery query, CriteriaBuilder cb) {
Predicate p = anonymousPredicateBuilder.build(root, cb);
return query.where(p).getRestriction();
}
}