Class SystemPropertiesLookup

java.lang.Object
org.apache.commons.configuration2.interpol.SystemPropertiesLookup
All Implemented Interfaces:
Lookup

@Deprecated public class SystemPropertiesLookup extends Object implements Lookup

A specialized implementation of the Lookup interface that allows access to system properties.

This implementation relies on StrLookup.systemPropertiesLookup() from the Commons Lang project to resolve system properties. It can be used for referencing system properties in configuration files in an easy way, for instance:

 current.user = ${sys:user.name}
 

SystemPropertiesLookup is one of the standard lookups that is registered per default for each configuration.

Since:
2.0
  • Constructor Details

  • Method Details

    • lookup

      public Object lookup(String variable)
      Deprecated.
      Description copied from interface: Lookup
      Looks up the value of the specified variable. This method is called by ConfigurationInterpolator with the variable name extracted from the expression to interpolate (i.e. the prefix name has already been removed). A concrete implementation has to return the value of this variable or null if the variable name is unknown.
      Specified by:
      lookup in interface Lookup
      Parameters:
      variable - the name of the variable to be resolved
      Returns:
      the value of this variable or null