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SpringSpecificationBuilder

欢迎使用Spring Specification Builder， 本项目旨在减少开发人员在对Specification对象构建时的繁琐而单调的操作。

  • 本项目在使用时需要继承SpringSpecificationBuilder，并通过泛型指定所要查询的持久类；
  • 通过对继承类加上注解来达到对继承类注册的功能。注册采用懒加载模式，并会校验查询条件的合理性；
  • SpringSpecificationBuilder中的set方法，通过反射来保持代码的动态性，使得继承类不需要声明查询所需的字段；
  • 通过build方法获取Specification实例，这个实例是由SpringSpecificationImpl实现的。

具体使用方式如下：

@QueryRequirement(restrictions = {@Restriction(field = "myField",operator = Operator.NotNull)})
public class MySpecificationBuilder<MyEntity> extends SpringSpecificationBuilder{
    public static void main(String[]args){
        Specification<MyEntity> spec = new MySpecificationBuilder().set("myField").build();
        //使用spec对象进行查询
    }
}

English part is translate by Google

Welcome to the Spring Specification Builder, this project is designed to reduce the tedious and monotonous operation of developers in the construction of the Specification instance.

  • This project needs to inherit SpringSpecificationBuilder when it is used, and specify the persistent class to be queried through generics.
  • The function of registering an inherited class is achieved by annotating the inherited class. Registration uses lazy loading mode and will verify the reasonableness of the query conditions.
  • The set method in SpringSpecificationBuilder keeps the dynamics of the code through reflection, so that the inherited class does not need to declare the fields required by the query.
  • Get the Specification instance through the build method, which is implemented by SpringSpecificationImpl.

Example code as following:

@QueryRequirement(restrictions = {@Restriction(field = "myField",operator = Operator.NotNull)})
public class MySpecificationBuilder<MyEntity> extends SpringSpecificationBuilder{
    public static void main(String[]args){
        Specification<MyEntity> spec = new MySpecificationBuilder().set("myField").build();
        //Query with the specification instance
    }
}