com.trolltech.qt
Class QNoNativeResourcesException
java.lang.Object
java.lang.Throwable
java.lang.Exception
java.lang.RuntimeException
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. |
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 |
QNoNativeResourcesException
public QNoNativeResourcesException(java.lang.String message)
- Creates a new QNoNativeResourcesException with the specified message.