net.axyana.qizxopen.xquery
Class EmptyException

java.lang.Object
  java.lang.Throwable
      java.lang.Exception
          net.axyana.qizxopen.xquery.XQueryException
              net.axyana.qizxopen.xquery.XQEvalException
                  net.axyana.qizxopen.xquery.EmptyException

All Implemented Interfaces:

java.io.Serializable

public class EmptyException

extends XQEvalException

[Internal use] Thrown when a empty Value is encountered in a context that cannot handle it. Can be caught be enclosing expressions that accept empty sequences.

See Also:

Serialized Form

Nested Class Summary

Nested classes inherited from class net.axyana.qizxopen.xquery.XQEvalException

XQEvalException.StackFrame

Field Summary

static EmptyException

instance Unique instance.

Constructor Summary

EmptyException(java.lang.String reason)

Method Summary

static EmptyException

allowed() Unique instance.

Methods inherited from class net.axyana.qizxopen.xquery.XQEvalException

getContext, getStack, printStack, setContext

Methods inherited from class java.lang.Throwable

fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

instance

public static EmptyException instance

Unique instance.

Constructor Detail

EmptyException

public EmptyException(java.lang.String reason)

Method Detail

allowed

public static EmptyException allowed()

Unique instance.

Throwing a statically built exception is perfectly possible in Java. This saves the time needed to copy the call stack into the exception, at the cost of a meaningless printStackTrace(). But we dont care here, because this is meant to simplify the handling of optionally empty arguments.