Analysis And Application Of Object Persistence Model Based On Object Relation Mapping

It is difficult to describe the complex data in the real world with relational data model. Furthermore, it is complicated to operate relational data directly in applications. Comparing with relational model, Object-Oriented Model could model these complex data more naturally. This paper is mainly deal with how to persist object in the field of Healthy Monitoring. Persistent object can be stored in Object-Oriented Database directly, or be transferred into Relational Model to be persisted in Relational Database. Because OODBMS is not as common as RDBMS, Object-Oriented data should be stored in Relational Database, it increases the complexity of implementation. In addition, it is not attributed to being reused in other applications. According to the problem mentioned above, This paper designs and implements an independent Object Persistent Laye(rOPL), OPL is designed to implement Object-Relation Mapping. Using OPL, objects can be modeled in Object Model, and OPL stores these objects in RDBMS. First of all, OPL is not binding on a certain RDBMS. Secondly, Persistent Mechanism implemented by OPL is universal. OPL can be used in many applications. There are many kinds of data in the field of Health Monitoring. The structure of this data is always complex and the amount of this data is huge. In addition, there are universal and complicated relations between the data. This paper is mainly deal with how to persist objects in Healthy Monitor.