QDBusError Class Reference
[QtDBus module]

Detailed Description

The QDBusError class represents an error received from the D-Bus bus or from remote applications found in the bus.

When dealing with the D-Bus bus service or with remote applications over D-Bus, a number of error conditions can happen. This error conditions are sometimes signalled by a returned error value or by a QDBusError.

C++ and Java exceptions are a valid analogy for D-Bus errors: instead of returning normally with a return value, remote applications and the bus may decide to throw an error condition. However, the QtDBus implementation does not use the C++ exception-throwing mechanism, so you will receive QDBusErrors in the return reply (see QDBusReply::error()).

QDBusError objects are used to inspect the error name and message as received from the bus and remote applications. You should not create such objects yourself to signal error conditions when called from D-Bus: instead, use QDBusMessage::createError() and QDBusConnection::send().

See also QDBusConnection::send(), QDBusMessage, and QDBusReply.

Member Type Documentation

enum QDBusError::ErrorType

In order to facilitate verification of the most common D-Bus errors generated by the D-Bus implementation and by the bus daemon itself, QDBusError can be compared to a set of pre-defined values:

Member Function Documentation

QString QDBusError::errorString ( ErrorType error )   [static]

Returns the error name associated with error condition error.

This function was introduced in Qt 4.3.

bool QDBusError::isValid () const

Returns true if this is a valid error condition (i.e., if there was an error), otherwise false.

QString QDBusError::message () const

Returns the message that the callee associated with this error. Error messages are implementation defined and usually contain a human-readable error code, though this does not mean it is suitable for your end-users.

QString QDBusError::name () const

Returns this error's name. Error names are similar to D-Bus Interface names, like org.freedesktop.DBus.InvalidArgs.

See also type().

ErrorType QDBusError::type () const

Returns this error's ErrorType.

See also ErrorType.