[Q#4065518][A#4065546] Java: How to get the caller function name

https://stackoverflow.com/q/4065518

To fix a test case I need to identify whether the function is called from a particular caller function. I can't afford to add a boolean parameter because it would break the interfaces defined. How to go about this? This is what I want to achieve. Here I can't change the parameters of operation() as it is an interface implementation.

Answer

https://stackoverflow.com/a/4065546

You could try

APIzation

StackTraceElement[] stacktrace = Thread.currentThread().getStackTrace();
StackTraceElement e = stacktrace[2];//maybe this number needs to be corrected
String methodName = e.getMethodName();

package com.stackoverflow.api;

public class Human4065546 {

  public static String getMethodNameFromStackTrace(int num) {
    StackTraceElement[] stacktrace = Thread.currentThread().getStackTrace();
    StackTraceElement e = stacktrace[num];
    return e.getMethodName();
  }
}

package com.stackoverflow.api;

/**
 * Java: How to get the caller function name
 *
 * @author APIzator
 * @see <a href="https://stackoverflow.com/a/4065546">https://stackoverflow.com/a/4065546</a>
 */
public class APIzator4065546 {

  public static String java() throws Exception {
    StackTraceElement[] stacktrace = Thread.currentThread().getStackTrace();
    // maybe this number needs to be corrected
    StackTraceElement e = stacktrace[2];
    return e.getMethodName();
  }
}