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com.trolltech.qt
Class QNoNativeResourcesException

java.lang.Object
  extended by java.lang.Throwable
      extended by java.lang.Exception
          extended by java.lang.RuntimeException
              extended by com.trolltech.qt.QNoNativeResourcesException
All Implemented Interfaces:
java.io.Serializable

public class QNoNativeResourcesException
extends java.lang.RuntimeException

The QNoNativeResourceException is used to indicate that the C++ native resources of a Java object are destroyed while it is still referenced in Java.

Most Qt Jambi objects consist of a C++ part, i.e., native C++ resources, and a Java peer that wraps the public functions of the native objects. In most cases one can rely on the Java memory model and let objects be garbage collected, in which case this kind of exception will never occur (the garbage collector will only collect unreferenced memory in Java).

In some cases, the ownership of an object is transferred to C++, for instance, when QObjects are passed a parent or items are added to a QGraphicsScene. In these cases the C++ part of the object can be deleted explicitly by, for instance, using the C++ "delete" keyword. When the C++ part of the object has been deleted it can no longer be used and this exception is thrown.

It is possible to check if an object has a valid C++ part or not by checking that the value of nativeId() is non-null.

See Also:
Serialized Form

Constructor Summary
QNoNativeResourcesException(java.lang.String message)
          Creates a new QNoNativeResourcesException with the specified message.
 
Method Summary
 
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
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

QNoNativeResourcesException

public QNoNativeResourcesException(java.lang.String message)
Creates a new QNoNativeResourcesException with the specified message.


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