org.springframework.cloud.dataflow.shell.command

Class Assertions

java.lang.Object

org.springframework.cloud.dataflow.shell.command.Assertions

public class Assertions
extends Object

Various utility methods when dealing with shell commands.

Author:

Eric Bottard

Method Summary

Modifier and Type	Method and Description
static int	atMostOneOf(Object... namesAndValues) Accepts 2*N arguments, even ones being names and odd ones being values for those names.
static int	exactlyOneOf(Object... namesAndValues) Accepts 2*N arguments, even ones being names and odd ones being values for those names.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

exactlyOneOf

public static int exactlyOneOf(Object... namesAndValues)

Accepts 2*N arguments, even ones being names and odd ones being values for those names. Asserts that exactly only one value is non null (or non-false, Boolean.FALSE being treated as false), or throws an exception with a descriptive message otherwise.

Parameters:

namesAndValues - the list of names and values

Returns:

the index of the "pair" that was not null

Throws:

IllegalStateException - if more than one argument is non null

IllegalArgumentException - if the method is called with invalid values (e.g. non even number of args)

atMostOneOf

public static int atMostOneOf(Object... namesAndValues)

Accepts 2*N arguments, even ones being names and odd ones being values for those names. Asserts that at most one value is non null (or non-false, Boolean.FALSE being treated as false), or throws an exception with a descriptive message otherwise.

Parameters:

namesAndValues - the list of names and values

Returns:

the index of the "pair" that was not null, or -1 if none was set

Throws:

IllegalStateException - if more than one argument is non null

IllegalArgumentException - if the method is called with invalid values (e.g. non even number of args)