How to use

numberOfArguments

method

in

com.linkedin.transport.api.udf.StdUDF

/**
 * Returns an array of booleans indicating if any input argument is nullable.
 *
 * Nullable arguments are arguments that can receive a null value. For a nullable argument, the user must explicitly
 * handle null values in their implementation. For a non-nullable argument, the UDF returns null if the argument
 * is null. The length of the returned array should be equal to the number of input arguments. Defaults to all
 * arguments being non-nullable.
 */
public boolean[] getNullableArguments() {
 return new boolean[numberOfArguments()];
}

/**
 * Returns an array of booleans indicating if any input argument is nullable.
 *
 * Nullable arguments are arguments that can receive a null value. For a nullable argument, the user must explicitly
 * handle null values in their implementation. For a non-nullable argument, the UDF returns null if the argument
 * is null. The length of the returned array should be equal to the number of input arguments. Defaults to all
 * arguments being non-nullable.
 */
public boolean[] getNullableArguments() {
 return new boolean[numberOfArguments()];
}

/** Returns an array of booleans indicating if any input argument is nullable and also verifies its length */
public final boolean[] getAndCheckNullableArguments() {
 boolean[] nullableArguments = getNullableArguments();
 if (nullableArguments.length != numberOfArguments()) {
  throw new RuntimeException(
    "Unexpected number of nullable arguments. Expected:" + numberOfArguments() + " Received:"
      + nullableArguments.length);
 }
 return nullableArguments;
}

/** Returns an array of booleans indicating if any input argument is nullable and also verifies its length */
public final boolean[] getAndCheckNullableArguments() {
 boolean[] nullableArguments = getNullableArguments();
 if (nullableArguments.length != numberOfArguments()) {
  throw new RuntimeException(
    "Unexpected number of nullable arguments. Expected:" + numberOfArguments() + " Received:"
      + nullableArguments.length);
 }
 return nullableArguments;
}