Modul org.freedesktop.dbus
Package org.freedesktop.dbus.annotations

Annotationsschnittstelle PropertiesEmitsChangedSignal

@Target(METHOD) @Retention(RUNTIME) public @interface PropertiesEmitsChangedSignal
From DBUS Specification:
If set to false, the org.freedesktop.DBus.Properties.PropertiesChanged signal,
see the section called “org.freedesktop.DBus.Properties” is not guaranteed to be emitted if the property changes.

If set to const the property never changes value during the lifetime of the object it belongs to,
and hence the signal is never emitted for it.

If set to invalidates the signal is emitted but the value is not included in the signal.

If set to true the signal is emitted with the value included.
The value for the annotation defaults to true if the enclosing interface element does not specify the annotation. Otherwise it defaults to the value specified in the enclosing interface element.

This annotation is intended to be used by code generators to implement client-side caching of property values.
For all properties for which the annotation is set to const, invalidates or true the client may unconditionally
cache the values as the properties don't change or notifications are generated for them if they do.