ArgumentAssertion (Silverpeas Core 6.4 API)

java.lang.Object
- org.silverpeas.core.util.ArgumentAssertion

```
public final class ArgumentAssertion
extends Object
```
ArgumentAssertion gathers all of the assertion operations that can be used for for checking the arguments specified in method call are correct. If an assertion failed, then an IllegalArgumentException is thrown. Using a such class to check the arguments before any code execution in a method ensures at the beginning the published contract of a method is well satisfied. It permits to detect in an explicit way the violation of that contract and thus to fix it in a fast way. Without any argument checking, the violation detection could be done in a more or less deep stacktrace execution of the method and in an implicit way, so letting it difficult to identify and to fix it.

Constructor Summary

Constructors
Constructor Description

ArgumentAssertion()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static void`	`assertDefined(String arg, String msg)`	Asserts the specified String argument is well defined, that is it is not null and not empty.
`static void`	`assertNotDefined(String arg, String msg)`	Asserts the specified String argument is not defined, that is it is null or empty.
`static void`	`assertNotNull(Object arg, String msg)`	Asserts the specified argument is not null.
`static void`	`assertTrue(boolean arg, String msg)`	Asserts the specified argument is true.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ArgumentAssertion
```
public ArgumentAssertion()
```
- Method Detail
  - assertDefined
```
public static void assertDefined(String arg,
                                 String msg)
```
    Asserts the specified String argument is well defined, that is it is not null and not empty.
    
    Parameters:
    
    arg - the argument to assert.
    
    msg - the message to pass if the argument isn't well defined.
  - assertNotDefined
```
public static void assertNotDefined(String arg,
                                    String msg)
```
    Asserts the specified String argument is not defined, that is it is null or empty.
    
    Parameters:
    
    arg - the argument to assert.
    
    msg - the message to pass if the argument isn't well verified.
  - assertNotNull
```
public static void assertNotNull(Object arg,
                                 String msg)
```
    Asserts the specified argument is not null.
    
    Parameters:
    
    arg - the argument to assert.
    
    msg - the message to pass if the argument is null.
  - assertTrue
```
public static void assertTrue(boolean arg,
                              String msg)
```
    Asserts the specified argument is true.
    
    Parameters:
    
    arg - the argument to assert.
    
    msg - the message to pass if the argument is false.