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MoDisco/Components/QueryManager/Architecture
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Contents
Use cases
This document assumes that:
- A user is the actor which uses the query manager
- A developer is a kind of user which creates queries.
UC1 - Create query set: The developer creates a query set by declaring its identifier and the used meta-models. Each query set contains one or more queries. The developer has to add queries in the new query set (UC2)
UC2 - Add a query in a query set: The user selects an existing query set and adds a new query in this query set. Each query has a name and this name is the query identifier. To add a model query the developer has to provide: the name, the parameters, the description and the implementation. All the model query sets are automatically detected and added into a catalog.
UC3 - Use a model query: To use a model query the user has to find it in the model query set catalog (UC5). To execute a query the developer has to provide an execution context (a set of models and of model elements) and the parameter values.
UC4 - Add a query to a meta-class: The user wants to create a query to a dedicated meta-class by selecting the meta-class or one of its instances. He has to choose a query set in the catalog, or create a new query set (UC1) and then create a new query.
UC5 - Find a query in the catalog: by scope, by name, by query set name, by return type.
UC6 - Publish a model query: The developer publishes a query set to allow other users to install the query set in their working environment. A published and/or installed query cannot be modified by the query set user (to make sure that the published model query set will never be modified). An installed model query set is available through the model query set catalog. A published query set has a version number.
UI realization
UC1 - Create a query set
- using a wizard (New QuerySet model)
- from the main menu, package explorer, navigator, etc. If a project was selected, it is automatically chosen in the wizard.
- from the query panel of the "Query Execution" view
UC2 - Add a query in a query set
- using the query model editor
- the name, parameters, implementation class, etc. are chosen through the Eclipse Properties view
- using a wizard from the popup menu of an existing query set:
- the name, parameters, implementation class, etc. are fields in this wizard
- each query type (Java, OCL, etc.) can contribute a page to this wizard, for its own specific attributes (eg: Java class, OCL query)
UC3 - Use a model query
- using the "Query Execution" view
- using the browser's "Display Queries On Selected Element(s)"
UC4 - Add a query to a meta-class
- a wizard on an EClass or EObject (whose EClass will be used)
- same wizard as for UC2
- query scope is already chosen based on the selection