![]() ![]() JSON CLASS GENERATOR JAVA GITHUB HOW TOHow to support regular expressions in JSON Schema elements.How to deal with constraints in the number of properties of a concept.How to properly deal with allOf, oneOf, anyOf and the generated hierarchy.Some of the domain-specific challenges we identified while developing the tool were the following: The mapping between JSON Schema and UML Class diagram elements is not trivial and some of them may depend on the domain where the tools is applied. Excerpt of the UML Class diagram obtained from the JSON Schema With JSONSchema-to-UML you could, for instance, create nice UML visualizations to help you understand the data provided by sensors Click To Tweet Challenges of a JSONSchema to UML transformation Figure 1 shows an excerpt of a JSON Schema definition (extracted from FIWARE JSON Schema data models) while Figure 2 shows a part of the UML Class Diagram extracted with our tool.įigure 2. The folder structure is used to created UML Packages containing the UML Classes coming from the JSON Schema files.The elements defined in definitions are considered as a library of JSON Schema elements and therefore they generate new UML Classes. ![]() Hierarchies are created from allOf, oneOf, anyOf.The type of the association corresponds to the UML Class element created from the object (or the referred object) If the property is of type object or refers to another element (using $ref), an association is created in the UML Class.If the property is of type enum, an Enumeration will be created and an attribute in the UML Class will be added.If the property is of primitive type it will become an attribute in the UML Class.Properties in JSON Schema elements represent the properties of a UML Class.Each JSON Schema element is represented by a UML Class.The generation process applied by the tool follows this (non-exhaustive) list of mappings: Generating UML Class diagrams from JSON Schema definitions JSON CLASS GENERATOR JAVA GITHUB INSTALLAll the instructions on how to install and use the tool are available in the Github repository. The tool is available as an open source Eclipse plugin. By providing a graphical representation, developers can easily visualize the data model behind a set of JSON Schema definitions, thus promoting understanding and maintainability. The tool analyzes JSON Schema definitions and generates a UML Class Diagram including the data elements as concepts, attributes, and relationships. JSONSchema-to-UML automatically creates UML class diagrams out of JSONSchema specifications Click To Tweet JSONSchema-to-UML has been developed as part of a collaborative project with Cmind. In this post, we present our tool JSONSchema-to-UML, a tool to generate UML models from JSON schema documents. ![]() Despite the popularity of JSONSchema, very few tools target the visualization and understanding of JSONSchema definitions. JSONSchema annotations allow describing the format of JSON data elements in a human- and machine-readable way, thus promoting data documentation and automated data testing. JSONSchema is a specification to annotate and validate JSON documents (for instance as part of an OpenAPI specification). Btw, this is one of the main challenges of open data initiatives.Īmong these formats, JSONSchema is becoming more and more popular. However, data management can easily turn into a very hard task as companies usually have to deal with a huge amount of heterogeneous data sources in a variety of data formats like XML, RDF or JSON Schema. We live in a data-driven world where managing and providing access to data has become key for any kind of business. ![]()
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