Is it possible to get the method name of a java.util.function.Function. I would like to log each time the name of the method being used. The following example prints the Lambda object but I have not found an easy way to get the method name:
public class Example {
public static void main(String[] args) {
Example ex = new Example();
ex.callService(Integer::getInteger, "123");
}
private Integer callService(Function<String, Integer> sampleMethod, String input) {
Integer output = sampleMethod.apply(input);
System.out.println("Calling method "+ sampleMethod);
return output;
}
}
You have to think about, what you're actually doing, when passing a method reference. Because this:
Integer::getInteger
Is almost identical (there is a stack layer more with the below approach) to this:
s -> Integer.getInteger(s)
And above is again similar to the following:
new Function<String, Integer> {
@Override
public Integer apply(String s){
return Integer.getInteger(s);
}
}
And in the last snippet you clearly see that there is no logical connection to the called method Integer#getInteger(String)
. Which explaind why it is impossible to do what you intend without introducing something new.
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