# Uses of Interface
ch.qos.logback.core.spi.PropertyDefiner

Packages that use PropertyDefiner
Package
Description
ch.qos.logback.core
Contains the main classes of logback core.
ch.qos.logback.core.property

## Uses of PropertyDefiner in ch.qos.logback.core

Classes in ch.qos.logback.core that implement PropertyDefiner
Modifier and Type
Class
Description
`class`
`PropertyDefinerBase`
A skeleton implementation for property definers so that they derive from `ContextAwareBase`.

## Uses of PropertyDefiner in ch.qos.logback.core.property

Classes in ch.qos.logback.core.property that implement PropertyDefiner
Modifier and Type
Class
Description
`class`
`FileExistsPropertyDefiner`
In conjunction with `PropertyAction` sets the named variable to "true" if the file specified by `path` property exists, to "false" otherwise.
`class`
`ResourceExistsPropertyDefiner`
In conjunction with `PropertyAction` sets the named variable to "true" if the `resource` specified by the user is available on the class path, "false" otherwise.