CN103617167A - Universal metadata/ relation mapping frame - Google Patents
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Abstract
The invention discloses a universal metadata/ relational mapping frame. The universal metadata/ relational mapping frame can be adapted to an existing metadata module of an electric power data management platform. By the adoption of the universal metadata/ relational mapping frame, by means of dynamic proxy, AOP and the like, transparent object-oriented packaging is conducted on operations such as addition, deletion, change and search on the most original metadata, and abilities and features of a relation model are added to the metadata which are stored in the mode of a three-layer HashMap structure at the same time. According to the universal metadata/ relational mapping frame, structural reading and writing operation on the metadata is converted into the object-oriented operation based on the relation model in a seamless mode, the intelligibility and the maintainability of codes of each layer of modules in the electric power data management platform are greatly improved, and the attention of system development and use personnel to the bottom-layer structure of the metadata is effectively reduced.
Description
Technical field
The present invention relates to Database Management System in Electrical Power System field, be specially a kind of general metadata/Hibernate.
Background technology
The plug and play data platform that self-discipline disperses adopts usings the metadata that three layers of HashMap form represent and as unified structure, stores the electric power data of various forms.Though metadata has solved the normalized problem of isomeric data, but in data platform the developer of lower module can only by call the get/put method that HashMap supports and specify Tag/Key name as parameter to operations such as metadata increase, deletes, changes, looks into, this not only makes block code run counter to the principle of Object-Oriented Design, and has reduced developer and data are related to the attention rate of concrete business.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of general metadata/Hibernate.
In order to achieve the above object, the technical solution adopted in the present invention is:
General metadata/Hibernate, is characterized in that: logical organization is as follows:
The definition of mapping configuration, the necessary configuration information of editing meta-data/relationship map, configuration information is kept in configuration file;
The generation of entity proxy class, according to mapping configuration, generates the bytecode of the entity proxy class corresponding with Tag in metadata;
The generation of DAO class and CRUD method thereof, according to mapping configuration, the bytecode for each Tag of metadata generates the CRUD method of corresponding DAO class, increases, deletes, changes, looks into operation for the mode with object-oriented and traffic aided to metadata;
MQL grammatical analysis, the MQL statement of the class SQL that user is submitted to carries out grammatical analysis, and points out syntax error message;
Result set encapsulation and iteration, carry out the MQL statement that user submits to, and be encapsulated as list that entity proxy class object forms to facilitate follow-up iterative operation by returning results collection;
Transaction management, in the process that metadata is changed, if there are automatic rollback data of any mistake, to guarantee the data integrity of metadata.
Described a kind of general metadata/Hibernate, is characterized in that: the definition procedure of described mapping configuration is as follows:
Step 1: start mapping configuration definition module, the metadata format that selection will operate;
Step 2: entity class title corresponding to each Tag in definition metadata;
Corresponding field name and the type of each Key under step 3: definition of T ag;
Step 4: the middle level Map of three layers of HashMap that adopt according to metadata, defines composition field corresponding to its Key value, the major key field of usining as aftermentioned entity class;
Step 5: whether configuration is shone upon in analysis verification above legal.
Described a kind of general metadata/Hibernate, is characterized in that: the generative process of described entity proxy class is as follows:
Step 1: read Map Profile, obtain the information of entity class and field thereof;
Step 2: according to mapping configuration, utilize virtual machine bytecode Core Generator, generate the bytecode of entity class, comprise the setter/getter method of field, major key field, each field;
Step 3: in conjunction with dynamic proxy pattern, for entity class generates proxy interface;
Step 4: utilize virtual machine bytecode Core Generator, generate the class that realizes of proxy interface.
Described a kind of general metadata/Hibernate, is characterized in that: the generative process of described DAO class and CRUD method thereof is as follows:
Step 1: according to mapping configuration, utilize virtual machine bytecode Core Generator, for each Tag of metadata generates the bytecode of corresponding DAO class;
Step 2: for each field of entity class generates corresponding findBy method, its value of take certain field is search criterion, returns to the entity object list of the capable formation of the record matching under corresponding Tag;
Step 3: generate findByPK method, its value of take major key field is search criterion, returns to the capable corresponding entity object of unique record under corresponding Tag with identical middle level Key value;
Step 4: generate findAll method, it returns to the entity object list of the capable formation of all records under corresponding Tag;
Step 5: generate findByConditions method, it usings respectively a plurality of field values of appointment and field name as query composition condition and sort by, returns to the entity object list that the record matching under corresponding Tag was passed through and formed after sequence;
Step 6: generate update method, its major key field according to the entity object of appointment finds that to have unique record of identical middle level Key value under corresponding Tag capable, and use each field value of entity object to upgrade the corresponding Key value of this record under capable;
Step 7: generate delete method, its major key field according to the entity object of appointment finds that to have unique record of identical middle level Key value under corresponding Tag capable, and it is capable to delete this record;
Step 8: generate insert method, it finds corresponding Tag according to the entity class under designated entities object, and a newly-increased record is gone under this Tag, middle level Key value of this record row is the major key field value of designated entities object.
Described a kind of general metadata/Hibernate, it is characterized in that: the MQL grammatical analysis providing by framework, MQL statement are carried out and result set encapsulation logic, and the MQL statement that in data management platform, the developer of lower module can write class SQL grammer is directly to carry out CRUD operation to metadata.
Described a kind of general metadata/Hibernate, it is characterized in that: when the write operations such as metadata is increased, deletes, changed, metadata/Hibernate is by unlatching and the submission of the automatic care of transaction of AOP technology, and there is any executed write operation before automatic rollback when abnormal, integrality and the consistance of metadata have been guaranteed, and reduced the invasives of non-functional code to service code such as affairs control, thereby the intelligibility that effectively promotes each lower module code in data management platform is with maintainable.
The present invention can seamless adaptation on existing meta data block in electric power data management platform.Framework is by means such as dynamic proxy and AOP, the operations such as the most original metadata increases, deletes, changes, looks into are carried out to transparent enclosure, metadata query language MQL(Metadata Query Language), Object oriented encapsulation, result set encapsulation and the iteration API of Tag and entity object mapping configuration, metadata CRUD operation, affairs control etc. for the metadata with the storage of three layers of HashMap structure has increased the ability that relational model was possessed and feature, specifically comprise:.
Compared with prior art, tool has the following advantages in the present invention:
(1), framework adopts the non-intruding mechanism such as dynamic proxy, bytecode generation and AOP to realize, and does not need to revise any code of the meta data block that the existing HashMap of take is storage organization.Framework itself also with the Bundle form hot plug of OSGi in data management platform, all configurable parts all leave in independently in Map Profile.
(2), there is any executed write operation before automatic rollback when abnormal in framework, integrality and the consistance of metadata have not only been guaranteed, and reduced the invasives of non-functional code to service code such as affairs control, thereby the intelligibility that effectively promotes each lower module code in data management platform is with maintainable.
(3), while using this Development of Framework data management platform Zhong Ge lower floor mould, can be with the mode Operand data of entity object, make code logic be easier to understand, and promote developer and data are related to the attention rate of concrete business.
(4), this framework makes each lower module in data management platform can follow the Java EE multi-layer framework exploitation of standard, makes the clear separation of each layer identification code, and the quick demand change of power grid application is had to higher adaptability.
Accompanying drawing explanation
Fig. 1 is function of the present invention and logical partitioning figure.
Embodiment
As shown in Figure 1.General metadata/Hibernate, logical organization is as follows:
The definition of mapping configuration, the necessary configuration information of editing meta-data/relationship map, configuration information is kept in configuration file;
The generation of entity proxy class, according to mapping configuration, generates the bytecode of the entity proxy class corresponding with Tag in metadata;
The generation of DAO class and CRUD method thereof, according to mapping configuration, for each Tag of metadata generates CRUD(Create, Retrieve, Update, the Delete of corresponding DAO class (Data Access Object)) bytecode of method, for the mode with object-oriented and traffic aided, metadata is increased, deletes, changes, looks into operation;
MQL grammatical analysis, the MQL statement of the class SQL that user is submitted to carries out grammatical analysis, and points out syntax error message;
Result set encapsulation and iteration, carry out the MQL statement that user submits to, and be encapsulated as list that entity proxy class object forms to facilitate follow-up iterative operation by returning results collection;
Transaction management, in the process that metadata is changed, if there are automatic rollback data of any mistake, to guarantee the data integrity of metadata.
The definition procedure of mapping configuration is as follows:
Step 1: start mapping configuration definition module, the metadata format that selection will operate;
Step 2: entity class title corresponding to each Tag in definition metadata;
Corresponding field name and the type of each Key under step 3: definition of T ag;
Step 4: the middle level Map of three layers of HashMap that adopt according to metadata, defines composition field corresponding to its Key value, the major key field of usining as aftermentioned entity class;
Step 5: whether configuration is shone upon in analysis verification above legal.
The generative process of entity proxy class is as follows:
Step 1: read Map Profile, obtain the information of entity class and field thereof;
Step 2: according to mapping configuration, utilize virtual machine bytecode Core Generator, generate the bytecode of entity class, comprise the setter/getter method of field, major key field, each field;
Step 3: in conjunction with dynamic proxy pattern, for entity class generates proxy interface;
Step 4: utilize virtual machine bytecode Core Generator, generate the class that realizes of proxy interface.
The generative process of DAO class and CRUD method thereof is as follows:
Step 1: according to mapping configuration, utilize virtual machine bytecode Core Generator, for each Tag of metadata generates the bytecode of corresponding DAO class;
Step 2: for each field of entity class generates corresponding findBy method, its value of take certain field is search criterion, returns to the entity object list of the capable formation of the record matching under corresponding Tag;
Step 3: generate findByPK method, its value of take major key field is search criterion, returns to the capable corresponding entity object of unique record under corresponding Tag with identical middle level Key value;
Step 4: generate findAll method, it returns to the entity object list of the capable formation of all records under corresponding Tag;
Step 5: generate findByConditions method, it usings respectively a plurality of field values of appointment and field name as query composition condition and sort by, returns to the entity object list that the record matching under corresponding Tag was passed through and formed after sequence;
Step 6: generate update method, its major key field according to the entity object of appointment finds that to have unique record of identical middle level Key value under corresponding Tag capable, and use each field value of entity object to upgrade the corresponding Key value of this record under capable;
Step 7: generate delete method, its major key field according to the entity object of appointment finds that to have unique record of identical middle level Key value under corresponding Tag capable, and it is capable to delete this record;
Step 8: generate insert method, it finds corresponding Tag according to the entity class under designated entities object, and a newly-increased record is gone under this Tag, middle level Key value of this record row is the major key field value of designated entities object.
The MQL grammatical analysis providing by framework, MQL statement are carried out and result set encapsulation logic, and the MQL statement that in data management platform, the developer of lower module can write class SQL grammer is directly to carry out CRUD operation to metadata.
When the write operations such as metadata is increased, deletes, changed, metadata/Hibernate is by AOP(Aspect-Oriented Programming) unlatching and the submission of the automatic care of transaction of technology, and there is any executed write operation before automatic rollback when abnormal, integrality and the consistance of metadata have been guaranteed, and reduced the invasives of non-functional code to service code such as affairs control, thereby the intelligibility that effectively promotes each lower module code in data management platform is with maintainable.
As shown in Figure 1, the present invention is a kind of general metadata/Hibernate, can be fitted in electric power data management platform on existing meta data block.Framework, by means such as dynamic proxy and AOP, has carried out transparent Object oriented encapsulation to operations such as the most original metadata increase, deletes, changes, looks into, simultaneously for the metadata with three layers of HashMap structure storage has increased the ability that relational model was possessed and feature.
Embodiment 1, generates entity proxy class.
First, read Map Profile, obtain the information of entity class and field thereof; Then, according to mapping configuration, utilize virtual machine bytecode Core Generator, generate the bytecode of entity class, comprise the setter/getter method of field, major key field, each field; Then, in conjunction with dynamic proxy pattern, for entity class generates proxy interface; Finally, generate the class that realizes of proxy interface.
Embodiment 2, generate corresponding DAO class and the CRUD method thereof of entity proxy class.
First, according to mapping configuration, utilize virtual machine bytecode Core Generator, for each Tag of metadata generates the bytecode of corresponding DAO class; Then, the findAll method of take findBy method that field value is search criterion, findByPK method that the major key field of take is search criterion for each DAO class generates, returning to the entity object list of capable formations of all records under corresponding Tag, the findByConditions method that is called query composition condition and sort by with a plurality of field values and field; Finally, generate respectively for revising, delete and insert update, delete and the insert method of entity class object.
Claims (6)
1. general metadata/Hibernate, is characterized in that: logical organization is as follows:
The definition of mapping configuration, the necessary configuration information of editing meta-data/relationship map, configuration information is kept in configuration file;
The generation of entity proxy class, according to mapping configuration, generates the bytecode of the entity proxy class corresponding with Tag in metadata;
The generation of DAO class and CRUD method thereof, according to mapping configuration, the bytecode for each Tag of metadata generates the CRUD method of corresponding DAO class, increases, deletes, changes, looks into operation for the mode with object-oriented and traffic aided to metadata;
MQL grammatical analysis, the MQL statement of the class SQL that user is submitted to carries out grammatical analysis, and points out syntax error message;
Result set encapsulation and iteration, carry out the MQL statement that user submits to, and be encapsulated as list that entity proxy class object forms to facilitate follow-up iterative operation by returning results collection;
Transaction management, in the process that metadata is changed, if there are automatic rollback data of any mistake, to guarantee the data integrity of metadata.
2. a kind of general metadata/Hibernate according to claim 1, is characterized in that: the definition procedure of described mapping configuration is as follows:
Step 1: start mapping configuration definition module, the metadata format that selection will operate;
Step 2: entity class title corresponding to each Tag in definition metadata;
Corresponding field name and the type of each Key under step 3: definition of T ag;
Step 4: the middle level Map of three layers of HashMap that adopt according to metadata, defines composition field corresponding to its Key value, the major key field of usining as aftermentioned entity class;
Step 5: whether configuration is shone upon in analysis verification above legal.
3. a kind of general metadata/Hibernate according to claim 1, is characterized in that: the generative process of described entity proxy class is as follows:
Step 1: read Map Profile, obtain the information of entity class and field thereof;
Step 2: according to mapping configuration, utilize virtual machine bytecode Core Generator, generate the bytecode of entity class, comprise the setter/getter method of field, major key field, each field;
Step 3: in conjunction with dynamic proxy pattern, for entity class generates proxy interface;
Step 4: utilize virtual machine bytecode Core Generator, generate the class that realizes of proxy interface.
4. a kind of general metadata/Hibernate according to claim 1, is characterized in that: the generative process of described DAO class and CRUD method thereof is as follows:
Step 1: according to mapping configuration, utilize virtual machine bytecode Core Generator, for each Tag of metadata generates the bytecode of corresponding DAO class;
Step 2: for each field of entity class generates corresponding findBy method, its value of take certain field is search criterion, returns to the entity object list of the capable formation of the record matching under corresponding Tag;
Step 3: generate findByPK method, its value of take major key field is search criterion, returns to the capable corresponding entity object of unique record under corresponding Tag with identical middle level Key value;
Step 4: generate findAll method, it returns to the entity object list of the capable formation of all records under corresponding Tag;
Step 5: generate findByConditions method, it usings respectively a plurality of field values of appointment and field name as query composition condition and sort by, returns to the entity object list that the record matching under corresponding Tag was passed through and formed after sequence;
Step 6: generate update method, its major key field according to the entity object of appointment finds that to have unique record of identical middle level Key value under corresponding Tag capable, and use each field value of entity object to upgrade the corresponding Key value of this record under capable;
Step 7: generate delete method, its major key field according to the entity object of appointment finds that to have unique record of identical middle level Key value under corresponding Tag capable, and it is capable to delete this record;
Step 8: generate insert method, it finds corresponding Tag according to the entity class under designated entities object, and a newly-increased record is gone under this Tag, middle level Key value of this record row is the major key field value of designated entities object.
5. a kind of general metadata/Hibernate according to claim 1, it is characterized in that: the MQL grammatical analysis providing by framework, MQL statement are carried out and result set encapsulation logic, and the MQL statement that in data management platform, the developer of lower module can write class SQL grammer is directly to carry out CRUD operation to metadata.
6. a kind of general metadata/Hibernate according to claim 1, it is characterized in that: when the write operations such as metadata is increased, deletes, changed, metadata/Hibernate is by unlatching and the submission of the automatic care of transaction of AOP technology, and there is any executed write operation before automatic rollback when abnormal, integrality and the consistance of metadata have been guaranteed, and reduced the invasives of non-functional code to service code such as affairs control, thereby the intelligibility that effectively promotes each lower module code in data management platform is with maintainable.
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| CN107832055A (en) * | 2017-12-11 | 2018-03-23 | 安徽科大国创云网科技有限公司 | A kind of MQL language translations are the method for sql like language |
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| CN104361425A (en) * | 2014-10-14 | 2015-02-18 | 许继电气股份有限公司 | Intelligent substation panoramic information comprehensive integrating and display method based on proxy |
| CN106033454A (en) * | 2015-03-17 | 2016-10-19 | 联想(北京)有限公司 | Methods for formatting and processing virtual file system, and devices for formatting and processing virtual file system |
| CN106033454B (en) * | 2015-03-17 | 2020-01-31 | 联想(北京)有限公司 | Formatting method, processing method and device of virtual file system |
| CN107832055A (en) * | 2017-12-11 | 2018-03-23 | 安徽科大国创云网科技有限公司 | A kind of MQL language translations are the method for sql like language |
| CN108958652A (en) * | 2018-06-25 | 2018-12-07 | 郑州云海信息技术有限公司 | A kind of method, apparatus and computer readable storage medium of record log information |
| CN111459470A (en) * | 2020-04-08 | 2020-07-28 | 上海尊溢商务信息咨询有限公司 | Method for generating code and document by docking third-party software through Hub system |
| CN111459470B (en) * | 2020-04-08 | 2023-05-02 | 上海尊溢商务信息咨询有限公司 | Method for generating codes and documents by interfacing Hub system with third party software |
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| CN112235132A (en) * | 2020-09-27 | 2021-01-15 | 广州视源电子科技股份有限公司 | Method, device, medium and server for dynamically configuring service |
| CN112235132B (en) * | 2020-09-27 | 2023-04-28 | 广州视源电子科技股份有限公司 | Method, device, medium and server for dynamically configuring service |
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