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java.lang.Object | +--java.lang.Throwable | +--java.lang.Exception | +--java.lang.RuntimeException | +--java.lang.IllegalArgumentException | +--org.apache.commons.lang.IllegalClassException
Thrown when an object is an instance of an unexpected type (a class or interface).
This exception supplements the standard IllegalArgumentException
by providing a more semantically rich description of the problem.
IllegalClassException
represents the case where a method takes
in a genericly typed parameter like Object (typically because it has to due to some
other interface it implements), but this implementation only actually accepts a specific
type, for example String. This exception would be used in place of
IllegalArgumentException
, yet it still extends it.
public void foo(Object obj) { if (obj instanceof String == false) { throw new IllegalClassException(String.class, obj); } // do something with the string }
Constructor Summary | |
IllegalClassException(Class expected,
Class actual)
Instantiates with the expected and actual types. |
|
IllegalClassException(Class expected,
Object actual)
Instantiates with the expected type, and actual object. |
|
IllegalClassException(String message)
Instantiates with the specified message. |
Methods inherited from class java.lang.Throwable |
fillInStackTrace,
getLocalizedMessage,
getMessage,
printStackTrace,
printStackTrace,
printStackTrace,
toString |
Methods inherited from class java.lang.Object |
clone,
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
wait,
wait,
wait |
Constructor Detail |
public IllegalClassException(Class expected, Object actual)
Instantiates with the expected type, and actual object.
expected
- the expected typeactual
- the actual objectpublic IllegalClassException(Class expected, Class actual)
Instantiates with the expected and actual types.
expected
- the expected typeactual
- the actual typepublic IllegalClassException(String message)
Instantiates with the specified message.
message
- the exception message
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