CN105787808A - IEC61968 standard document generation system and method based on generic programming and reflection mechanism - Google Patents

Abstract

The invention relates to an IEC61968 standard document generation system and method based on generic programming and reflection mechanism. The IEC61968 standard document generation system includes an Xsd processing module, a configuration file processing module, an XML generation module, a data query module and an XML document output module; Xsd The processing module transfers data with the configuration file processing module and the XML document output module respectively; the XML generation module transfers data with the configuration file processing module, the data query module and the XML document output module. The invention is based on the distribution network IEC61968 standard, uses generic programming and reflection mechanism technology, and generates a general method for XML documents conforming to the IEC61968 standard. Using this method can avoid repeated development of document conversion programs for power distribution application systems, unify the format of data exchange documents, reduce the implementation difficulty and cost of the integration of various power distribution applications, promote the construction of power distribution informatization, and improve the work of power distribution informatization Efficiency and correctness, thereby improving the operation level of distribution network.

Description

IEC61968 Standard Document Generation System and Method Based on Generic Programming and Reflection Mechanism

technical field

The invention relates to a power system and its automatic generation system and method, in particular to an IEC61968 standard document generation system and method based on generic programming and reflection mechanism.

Background technique

For the CIM model and XMLSchema of the IEC61968 standard: At present, most distribution network enterprises use the Distribution Common Information Model (Distribution Common Information Model, hereinafter referred to as the CIM model) defined by IEC61968 to describe the main objects of the distribution network, especially the operation of the distribution network. relevant data. The CIM model formulated by IEC61968 is a collection of classes (Class) defined by object-oriented technology. In principle, the equipment, behavior and events in each distribution network can be expressed by one or several instances of classes in the CIM model. The business in the distribution network can be expressed through the sequential combination of instances of multiple classes. Although IEC61968 is still in the process of formulation and improvement, this standard has become a recognized specification for information integration of power distribution enterprises.

IEC61968 focuses on the integration of distribution network business applications, and hopes to standardize the way and method of data exchange between various applications through this standard. Due to the lack of unified planning and management in the informationization process of the distribution network, the application systems developed by various business departments use different proprietary data formats and data interfaces, which hinders the interconnection of various application systems. In order to promote the integration of various power distribution application systems, the IEC61968 standard defines a unified model of power distribution business data on the basis of the CIM model of the IEC61970 standard, and recommends the use of the XMLSchema standard (http://www.w3.org/2001/ XMLSchema) as a standard for standardizing data exchange formats. Therefore, the exchange data document conforming to the IEC61968 standard should be an XML document constrained by an XMLSchema document, and the semantic content in it is expressed by the CIM model defined by the IEC61968 standard, that is, an instance of an object-oriented class.

The data exchanged between power distribution business systems must be constrained by XMLSchema based on IEC61968 in order to meet the requirements of the IEC61968 standard.

XMLSchema is generally stored with a file with the suffix ".xsd", so XMLSchema is usually also called Xsd. In this article, the two terms XMLSchema and Xsd will be used equally without distinction.

According to this standard, the original business system of the distribution network must transform the original data interface into an XML document that can output or accept XMLSchema documents as constraints. In this case, a general method for transforming distribution network data into an XML document constrained by an XMLSchema document will be discussed.

This problem can be summarized as: generate XMLSchema (Xsd) XML conforming to a subset of the IEC61968 standard based on existing business data. Specific to IT technology, that is, the problem of generating specific XML from Xsd (XMLschema) files can also be defined as:

From an Xsd (which can contain references to other Xsd files) and original business data (which can include relational data in relational databases, xml files, records in xml databases, and other types of data), generate a legal Xsd-constrained xml file.

The Xsd file is actually a collection of rules, and there can be infinitely many XML instance files that conform to this rule. Generating XML according to the Xsd file is equivalent to realizing the mapping relationship. Obviously, to realize this kind of mapping, it must be supplemented with actual data and specific generation algorithms.

Visually speaking, the classes in the CIM model defined by the IEC61968 standard can be regarded as standard components of industrial production, such as bearings, crankshafts, etc.; and a certain Xsd that conforms to the IEC61968 specification can be regarded as an assembly drawing of a product; and the generated XML The process is the process of product assembly.

Currently in the industry, Xsd is used to generate XML. In Java programming technology, there are XMLbeans and jaxb technologies. The basic idea of these two technologies is to convert Xsd into Java classes and use this code to generate XML files. This method The limitation is that the Java source code must be generated for each Xsd. This method forms the binding between the Java source code and the Xsd. Once the Xsd changes, the Java code must be changed accordingly and recompiled to work; the program is Binding in some fixed Java classes, it is difficult to adapt to the situation where many Xsds need to be processed and Xsds often change. The situation with C# and other programming languages is similar to Java. However, there may be quite a few Xsds based on IEC61968 used in the power distribution business system. For example, the Xsds used in the power distribution automation system can reach hundreds, and they will change due to changes in business arrangements. XML generation problem in electric business.

For generic programming:

Java, C++, and C# are the most widely used programming languages. These languages strictly check the data types, so that the same algorithm needs to develop different functions for different data types (such as sorting algorithms, which need to be used for integer, floating-point, character, etc. Data types develop different functions), which increases the complexity of programming. Generic programming technology allows the data type to be passed to a function as a parameter, which makes it possible to use the same function to process the same algorithm for multiple data types. Generic programming is based on iterators (Iterators) and containers (Containers). It is a generic algorithm (GenericAlgorithms) technology. The container can accommodate a collection of data types specified by type parameters, so that these generic algorithms can operate. Among them, generic algorithms (algorithms), generic iterators (iterators), generic containers (containers), and function objects (functionobjects) and other technologies not only enable multiple data types to share common functions, but also make the program structure more concise and reasonable. , intuitive and easy to understand.

There are thousands of classes (Class) in the IEC61968CIM model, most of which are derived from a basic class (IdentifiedObject), and all have similar structures and attributes, and their status and functions in business logic are very similar, so they are very suitable Generalize with generic programming.

For the JAVA reflection mechanism:

The Java reflection mechanism (Reflection) is in the running state. For any class, you can know all the properties and methods of this class; for any object, you can call any of its methods and properties; this dynamically obtained information And the function of dynamically calling the method of the object is called the reflection mechanism of the Java language. We can load, detect, and use classes that are completely unknown during compilation at runtime. In other words, a Java program can load a class whose name is known at runtime, learn its complete structure (but not including methods definition), and generate its object entity, or set values for its fields, or call its methods.

The dynamic loading of the reflection mechanism, detecting and using completely unknown Classes during compilation This patent plays an important role. When the program processes Xsd, it can dynamically generate Xsd at runtime without knowing the specific structure and composition of Xsd at compile time. The CIM model class corresponding to the element, set the attribute of the model class, call the function of the model class, so that the writing of the XML generation program can get rid of the dependence on the Xsd structure and composition.

At present, the XML document conforming to the IEC61968 standard is a necessary condition for standardizing data exchange between power distribution business systems. However, the traditional method of generating XML is not universal. It needs to develop corresponding generating programs for each power distribution business system separately, and it is difficult to cope with the change of Xsd brought about by the change of business process.

Contents of the invention

In order to solve the deficiencies in the above-mentioned prior art, the object of the present invention is to provide a kind of IEC61968 standard document generation system and method based on generic programming and reflection mechanism, the XML generation program that the present invention is general and adapts to multiple Xsd and Xsd changes will Promote the integration between power distribution business systems, reduce the cost of power distribution business integration, and improve the work efficiency of power distribution business.

The object of the present invention is to adopt following technical scheme to realize:

The present invention provides an IEC61968 standard document generation system based on generic programming and reflection mechanism. The improvement is that the IEC61968 standard document generation system includes an Xsd processing module, a configuration file processing module, an XML generation module, a data query module and The XML document output module; the Xsd processing module transfers data with the configuration file processing module and the XML document output module respectively; the XML generation module transfers data with the configuration file processing module, the data query module and the XML document output module.

Further, the Xsd processing module is used to parse the Xsd file structure to obtain the Xsd namespace, simple data types, complex data types for XML root elements, and other Xsd files referenced by this xsd file; the configuration file processing The module is used to read and parse configuration files, obtain the root element name of the XML file to be generated, the mapping relationship between CIM classes and data types, and limit the conditions for generating elements of complex data types (including the number of child elements generated by this data type limit, the nesting level limit of complex data type elements);

The function of the XML generation module is to first generate a root element according to the namespace obtained by the Xsd processing module, the data type, and the configuration information obtained by the configuration file processing module, and then recursively generate a plurality of sub-elements of the root element until generating an Xsd conforming The XML structure of the standardized sequence structure; the data query module obtains the actual data record of the current processing element according to the current data type and the corresponding CIM class (the specific element can be obtained from the configuration file, such as the root element);

The XML document output module is responsible for writing the data in the data structure generated by the XML generating module into the XML document object and outputting it as a file.

A method for generating a general generation system for IEC61968 standard documents based on generic programming and reflection mechanism, the improvement of which is that

The method comprises the steps of:

(1) Configure XML generation parameters according to the Xsd file collection;

(2) Read the configuration, obtain the root element name of the XML file to be generated, and obtain the definition of the root element from the Xsd file collection;

(3) Obtain the name of the corresponding IEC61968CIM model class for the root element name currently processed, and use the reflection mechanism of the JAVA language to generate an instance of the CIM model class;

(4) Obtain the actual data record of the current processing element through the data query interface, and set the instance attributes of the CIM model class generated in step (3) according to the data of the actual data record;

(5) If the current generated element is derived from other more basic elements, that is, the inheritance relationship in object-oriented technology, then set this basic element as the current generated element, and perform steps (3)-(4);

(6) If the current element has a sequence sub-element, generate a model class instance corresponding to the CIM model element in the sequence sub-element;

(7) Use the generic programming container to hold the instance, and traverse each model class instance formed in the previous step, and perform steps (4)-(6) for each instance;

(8) When all elements are traversed and no new elements are generated, a data structure with the CIM class instance as the basic component and the sequence structure specified by Xsd is formed in the memory;

(9) Generate an XML document object, write the data in the data structure body into the XML document object according to the data structure generated in the previous step, and output it as a file.

Further, in the step (1), a configuration file is generated according to business requirements and actual conditions (such as on-site data completeness or data quality, etc.), and the storage location of the Xsd file, the access method of the business database, the storage location of the business file, The data matching method and Xsd element mapping parameters are configured, and the configuration file processing module reads the configuration file and generates a configuration parameter table in memory.

Further, in the step (2), the Xsd processing module parses the Xsd file, generates an Xsd element mapping table according to the Xsd element mapping parameter, and defines the Xsd element and the corresponding CIM class one by one in the Xsd element mapping table Mapping relationship; the XML generation module reads the configuration parameter table, finds the root element of the XML to be generated, and sets it as the current generated element.

Further, in the step (3), the XML generation module searches the Xsd element mapping table for the CIM class corresponding to the currently generated element, and uses the mapping mechanism to generate a CIM class instance.

Further, in the step (4), query the service data corresponding to the CIM class instance by the data query interface of the data query module, and fill in the instance attributes of the current CIM class instance, including the general attributes of the CIM class, including the name attribute ( name) and identifier attribute (mrid), as well as specific attributes of the CIM class, such as the length attribute of the line class and the capacity attribute of the switch class.

Further, in the step (9), the XML document output module is invoked to generate an XML document according to the data structure formed by all CIM classes, and output it as an XML file.

Compared with the closest prior art, the excellent effect that the technical solution provided by the present invention has is:

The invention is based on the distribution network IEC61968 standard, uses generic programming and reflection mechanism technology, and generates a general method for XML documents conforming to the IEC61968 standard. This method can be used to generate an XML document conforming to the IEC61968 standard according to a given XMLSchema document based on a certain subset of the IEC61968 standard, so that various applications in the distribution network can use this XML for data exchange and interoperability. Using this method can avoid repeated development of document conversion programs for power distribution application systems, unify the format of data exchange documents, reduce the implementation difficulty and cost of the integration of various power distribution applications, promote the construction of power distribution informatization, and improve the work of power distribution informatization Efficiency and correctness, thereby improving the operation level of distribution network.

Description of drawings

Fig. 1 is a block diagram of the XML generation program provided by the present invention.

detailed description

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

The following description and drawings illustrate specific embodiments of the invention sufficiently to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely represent possible variations. Individual components and functions are optional unless explicitly required, and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments. The scope of embodiments of the present invention includes the full scope of the claims, and all available equivalents of the claims. These embodiments of the present invention may be referred to herein, individually or collectively, by the term "invention", which is for convenience only and is not intended to automatically limit the application if in fact more than one invention is disclosed The scope is any individual invention or inventive concept.

The IEC61968 standard document general generation system schematic diagram based on generic programming and reflection mechanism provided by the present invention is shown in Figure 1, including Xsd processing module, configuration file processing module, XML generation module, data query module and XML document output module; The Xsd processing module transfers data with the configuration file processing module and the XML document output module respectively; the XML generation module transfers data with the configuration file processing module, the data query module and the XML document output module.

Described Xsd processing module is used for parsing Xsd file structure, obtains Xsd namespace, simple data type, the complex data type that is used for XML root element, and other Xsd files that this xsd file refers; Described configuration file processing module is used for Read and parse the configuration file to obtain the name of the root element of the XML file to be generated, the mapping relationship between CIM classes and data types, the conditions for generating elements of complex data types, including the limit on the number of child elements generated by this data type, complex Nesting layer limit of data type elements;

The function of the XML generation module is to first generate a root element according to the namespace obtained by the Xsd processing module, the data type, and the configuration information obtained by the configuration file processing module, and then recursively generate a plurality of sub-elements of the root element until generating an Xsd conforming The XML structure of the standardized sequence structure; the data query module obtains the actual data record of the current processing element according to the current data type and the corresponding CIM class;

The XML document output module is responsible for writing the data in the data structure generated by the XML generating module into the XML document object and outputting it as a file.

The application scenario of the present invention is that the applied distribution network business system needs to convert data into an XML document conforming to a certain subset of the IEC61968 standard XMLSchema, so as to exchange data with other business systems.

The general method for generating IEC61968 standard documents based on generic programming and reflection mechanism provided by the present invention uses generic programming and reflection mechanism technology on the basis of distribution network IEC61968 standard to generate a general method for XML documents conforming to IEC61968 standard. This method can be used to generate an XML document conforming to the IEC61968 standard according to a given XMLSchema document based on a certain subset of the IEC61968 standard, so that various applications of the distribution network can use this XML for data exchange and interoperability. Specific steps are as follows:

(1) Configure XML generation parameters according to the Xsd file collection; generate configuration files according to business requirements and actual conditions (such as on-site data completeness or data quality, etc.), store Xsd files, access methods of business databases, and store business files Position, data matching method, Xsd element mapping and other parameters are configured, and the configuration file processing module reads this configuration file and generates a configuration parameter table in memory.

(2) Read the configuration, obtain the root element name of the XML file to be generated, and obtain the definition of this element from the Xsd file collection; the Xsd processing module parses the Xsd file, and generates the Xsd element mapping table according to the Xsd element mapping parameters, This table defines the one-to-one mapping relationship between Xsd elements and corresponding CIM classes; the XML generation module reads the configuration parameter table, finds the root element of the XML to be generated, and sets it as the current generated element.

(3) Obtain the name of the CIM model class of corresponding IEC61968 at the name of the element of current processing, use the reflection mechanism of JAVA language to generate the instance of this CIM model class;

(4) Query the business data corresponding to this instance through the data query module, and fill in each attribute of the current CIM class instance accordingly.

(5) If the current generated element is derived from other more basic elements (that is, the inheritance relationship in object-oriented technology), set this basic element as the current generated element, and perform steps 4-5.

(6) If this element has a sequence sub-element, generate a model class instance corresponding to the CIM model element in the sequence sub-element;

(7) Use a generic programming container to accommodate these sequence sub-elements, and use 4-6 steps to traverse all elements in this container. Use generic programming containers to accommodate these instances, and traverse each instance, and perform steps 4-6 for each instance;

(8) Until all the elements in Xsd are traversed and no new elements are generated, a data structure with the CIM class instance as the basic component and the order structure specified by Xsd is formed in the memory.

(9) Call the XML document output module to generate XML documents according to the data structures formed by all CIM classes, and output them as XML files.

The present invention can avoid repeated development of document conversion programs for each application system of power distribution, unify the format of data exchange documents, reduce the implementation difficulty and implementation cost of each application integration of power distribution, promote the construction of power distribution informatization, and improve the efficiency of power distribution informatization and correctness, thereby improving the operation level of the distribution network.

The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still modify or equivalently replace the specific embodiments of the present invention. , any modifications or equivalent replacements that do not deviate from the spirit and scope of the present invention are within the protection scope of the claims of the present invention pending application.

Claims (8)

1. A kind of IEC61968 standard document generation system based on generic programming and reflection mechanism, it is characterized in that, described IEC61968 standard document generation system comprises Xsd processing module, configuration file processing module, XML generation module, data query module and XML document output module; the Xsd processing module transfers data with the configuration file processing module and the XML document output module respectively; the XML generation module transfers data with the configuration file processing module, the data query module and the XML document output module. 2. the IEC61968 standard document generation system as claimed in claim 1, is characterized in that, described Xsd processing module is used for parsing Xsd file structure, obtains Xsd name space, simple data type, can be used for the complex data type of XML root element, and other Xsd files referenced by this xsd file; the configuration file processing module is used to read and parse the configuration file, obtain the root element name of the XML file to be generated, the mapping relationship between the CIM class and the data type, and complex data types Conditions for generating elements, including the limit on the number of sub-elements of this data type, and the limit on the number of nesting layers of elements of complex data types; The function of the XML generation module is to first generate a root element according to the namespace obtained by the Xsd processing module, the data type, and the configuration information obtained by the configuration file processing module, and then recursively generate a plurality of sub-elements of the root element until generating an Xsd conforming The XML structure of the standardized sequence structure; the data query module obtains the actual data record of the current processing element according to the current data type and the corresponding CIM class; The XML document output module is responsible for writing the data in the data structure generated by the XML generating module into the XML document object and outputting it as a file. 3. the generation method of the IEC61968 standard document general generation system based on generic programming and reflection mechanism as described in any one of claim 1-2, it is characterized in that, The method comprises the steps of: (1) Configure XML generation parameters according to the Xsd file collection; (2) Read the configuration, obtain the root element name of the XML file to be generated, and obtain the definition of the root element from the Xsd file collection; (3) Obtain the name of the corresponding IEC61968CIM model class for the root element name currently processed, and use the reflection mechanism of the JAVA language to generate an instance of the CIM model class; (4) Obtain the actual data record of the current processing element through the data query interface, and set the instance attributes of the CIM model class generated in step (3) according to the data of the actual data record; (5) If the current generated element is derived from other more basic elements, that is, the inheritance relationship in object-oriented technology, then set this basic element as the current generated element, and perform steps (3)-(4); (6) If the current element has a sequence sub-element, generate a model class instance corresponding to the CIM model element in the sequence sub-element; (7) Use the generic programming container to accommodate the model class instance generated in the previous step, and traverse each instance, and perform steps (4)-(6) for each instance; (8) When all elements are traversed and no new elements are generated, a data structure with the CIM class instance as the basic component and the sequence structure specified by Xsd is formed in the memory; (9) Generate an XML document object, write the data in the data structure body into the XML document object according to the data structure generated in the previous step, and output it as a file. 4. the IEC61968 standard document generating method as claimed in claim 3, is characterized in that, in described step (1), according to business demand and actual situation, generate configuration file, to the access mode of Xsd file storage location, business database, business The storage location of the file, the data matching method and the Xsd element mapping parameters are configured, and the configuration file processing module reads the configuration file and generates a configuration parameter table in the memory. 5. the IEC61968 standard document generating method as claimed in claim 3, is characterized in that, in described step (2), Xsd processing module parses Xsd file, generates Xsd element mapping table according to Xsd element mapping parameter, described Xsd The one-to-one mapping relationship between Xsd elements and corresponding CIM classes is defined in the element mapping table; the XML generation module reads the configuration parameter table, finds the root element of the XML to be generated, and sets it as the current generated element. 6. the IEC61968 standard document generation method as claimed in claim 3, is characterized in that, in described step (3), XML generation module searches the corresponding CIM class of current generation element from Xsd element mapping table, uses mapping mechanism to generate CIM class instance. 7. the IEC61968 standard document generation method as claimed in claim 3, is characterized in that, in described step (4), query the business data corresponding to CIM class instance by the data query interface of data query module, and according to filling in current CIM class The instance attributes of the instance include the general attributes of the CIM class, including the name attribute name and the identifier attribute mrid, and the specific attributes of the CIM class, including the length attribute of the line class and the capacity attribute of the switch class. 8. the IEC61968 standard document generation method as claimed in claim 3, is characterized in that, in described step (9), calls XML document output module, according to the data structure that all CIM classes form, generates XML document, and outputs as an XML file.