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java.lang.Object
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+--java.lang.Throwable
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+--java.lang.Exception
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+--java.lang.RuntimeException
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+--java.lang.IllegalArgumentException
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+--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 object
public 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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