Nested Lists in Spring Expression Language

Nested Lists in Spring Expression Language



I have list of departments that have employees working on projects. I want

to return a list of projects for a specific sector e.g. 'IT'.

public class Dept{

int id;

String name;

List<Employee> employees;

}

public class Employee{

int id;

String name;

List<Project> projects;

}

public class Project{

int id;

String name;

String sector;

}

public List<Project> getEmployeesByProject(String

projectSector,List<Department> departments){

StandardEvaluationContext context = new StandardEvaluationContext(

departments.getEmployees());

List<Project> employees = (List<Project>) parser.parseExpression(

"Employees.![Projects.?[sector=='" + projectSector

+ "']]").getValue(context, List.class);

}

The method returns a list of employees, not projects. I have tried other

combinations but haven't been able to pull a list of projects.