open class PreferencesPlaceholderConfigurer : PropertyPlaceholderConfigurer, InitializingBean
Subclass of PropertyPlaceholderConfigurer that supports JDK 1.4's Preferences API (java.util.prefs).
Tries to resolve placeholders as keys first in the user preferences, then in the system preferences, then in this configurer's properties. Thus, behaves like PropertyPlaceholderConfigurer if no corresponding preferences defined.
Supports custom paths for the system and user preferences trees. Also supports custom paths specified in placeholders ("myPath/myPlaceholderKey"). Uses the respective root node if not specified.
Author
Juergen Hoeller
Since
16.02.2004
See Also
#setSystemTreePath#setUserTreePathjava.util.prefs.Preferences
PreferencesPlaceholderConfigurer()
Subclass of PropertyPlaceholderConfigurer that supports JDK 1.4's Preferences API ( Tries to resolve placeholders as keys first in the user preferences, then in the system preferences, then in this configurer's properties. Thus, behaves like PropertyPlaceholderConfigurer if no corresponding preferences defined. Supports custom paths for the system and user preferences trees. Also supports custom paths specified in placeholders ("myPath/myPlaceholderKey"). Uses the respective root node if not specified. |
static val SYSTEM_PROPERTIES_MODE_FALLBACK: Int
Check system properties if not resolvable in the specified properties. This is the default. |
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static val SYSTEM_PROPERTIES_MODE_NEVER: Int
Never check system properties. |
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static val SYSTEM_PROPERTIES_MODE_OVERRIDE: Int
Check system properties first, before trying the specified properties. This allows system properties to override any other property source. |
open fun afterPropertiesSet(): Unit
This implementation eagerly fetches the Preferences instances for the required system and user tree nodes. |
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open fun setSystemTreePath(systemTreePath: String): Unit
Set the path in the system preferences tree to use for resolving placeholders. Default is the root node. |
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open fun setUserTreePath(userTreePath: String): Unit
Set the path in the system preferences tree to use for resolving placeholders. Default is the root node. |
open fun setSearchSystemEnvironment(searchSystemEnvironment: Boolean): Unit
Set whether to search for a matching system environment variable if no matching system property has been found. Only applied when "systemPropertyMode" is active (i.e. "fallback" or "override"), right after checking JVM system properties. Default is "true". Switch this setting off to never resolve placeholders against system environment variables. Note that it is generally recommended to pass external values in as JVM system properties: This can easily be achieved in a startup script, even for existing environment variables. NOTE: Access to environment variables does not work on the Sun VM 1.4, where the corresponding |
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open fun setSystemPropertiesMode(systemPropertiesMode: Int): Unit
Set how to check system properties: as fallback, as override, or never. For example, will resolve ${user.dir} to the "user.dir" system property. The default is "fallback": If not being able to resolve a placeholder with the specified properties, a system property will be tried. "override" will check for a system property first, before trying the specified properties. "never" will not check system properties at all. |
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open fun setSystemPropertiesModeName(constantName: String): Unit
Set the system property mode by the name of the corresponding constant, e.g. "SYSTEM_PROPERTIES_MODE_OVERRIDE". |