Java object queries using JXPath

Company

Department

Employee (name, job title, age)

Acme Inc.

Sales

Johnny, Sales rep, 45

Sarah, Sales rep, 33

Magda, Office assistant, 27

Accounting

Steve, Head controller, 51

Peter, Assistant controller, 31

Susan, Office assistant, 27

With that in place, let's start using JXPath!

Executing simple JXPath queries

The simplest query possible extracts a single object from the object tree. For example, to retrieve Company, use the following code:

JXPathContext context = JXPathContext.newContext(company);Company c = (Company)context.getValue(".");