Groovy: Overloading of isCase method

In my previous post, I explained how can we use custom types in switch statement by overloading isCase method. We can even overload isCase method to get more flexibility.

HelloWorld.groovy

class Employee{
 int id
 String name

 Employee(int id, String name){
  this.id = id
  this.name = name
 }

 boolean isCase(Employee emp) {
  return emp.id == this.id
 }

 boolean isCase(int id){
  return id == this.id
 }
}

emp1 = new Employee(1, "Krishna")
emp2 = new Employee(2, "Ram")
emp3 = new Employee(1, "Ram")

switch(emp1){
 case emp2 : println "Both emp1 and emp2 has same id"; break
 case emp3 : println "Both emp1 and emp3 has same id"; break
 default : println "No match found"
}

switch(1){
 case emp1 : println "emp1 has id 1"; break
 case emp3 : println "emp3 has id 1"; break
 default : println "No match found"
}

Output

Both emp1 and emp3 has same id

emp1 has id 1

Previous                                                 Next                                                 Home