Package org.apache.commons.configuration2.interpol

Class EnvironmentLookup

java.lang.Object

org.apache.commons.configuration2.interpol.EnvironmentLookup

All Implemented Interfaces:

Lookup

@Deprecated
public class EnvironmentLookup
extends Object
implements Lookup

Deprecated.

Use DefaultLookups.ENVIRONMENT.

A specialized lookup implementation that allows access to environment variables.

This implementation relies on System.getenv() to resolve environment variables. It can be used for referencing environment variables in configuration files in an easy way, for instance:

 java.home = ${env:JAVA_HOME}
 

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

Since:

1.7

Constructor Summary

Constructors

Constructor	Description
EnvironmentLookup()	Deprecated.

Method Summary

Modifier and Type	Method	Description
String	lookup(String key)	Deprecated. Performs a lookup for the specified variable.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

EnvironmentLookup

public EnvironmentLookup()

Deprecated.

Method Details

lookup

public String lookup(String key)

Deprecated.

Performs a lookup for the specified variable. This implementation directly delegates to a System.getenv().

Specified by:

lookup in interface Lookup

Parameters:

key - the key to lookup

Returns:

the value of this key or null if it cannot be resolved