Angular Component Tree With Tables in the Leaves and a Flexible JPA Criteria Backend

First, the JPA Criteria backend is shown. How to select the results of a request with logically nested conditions like a request with these parameters: “(quarters=’Q1′ or quarters=’Q2′) and (concept like ‘%Income%’ or (a concept like ‘%revenue%’ and value > 1000000″))” then the result is displayed in an Angular frontend with an Angular Component Tree that displays a Table component in each leaf, and how to make such a Tree perform well.

Flexible Queries in the Backend

The Financial Data Controller receives the post request. It is mapped into a SymbolFinancialQueryParamDto and sent to the FinancialDataService, which ensures a transaction wrapper. The SymbolFinancialsRepositoryBean creates the query in the ‘findSymbolFinancials(…)’ method:

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