Apache Camel – Null safe operator for ‘simple’ statement

In Apache Camel we use “simple” statement to extract values in a pojo.

For example if we have a pojo “Employee” having “employeeId” as one of the attribute, and employee object is available in camel exchange body, we can retrieve the employee id with following statement.

simple("${body.employeeId}");

If by chance body is null above statement will throw null pointer exception. Apache Camel provides a solution to avoid this situation.  Use ?. instead of . to access attributes.

simple("${body?.employeeId}");