org.codehaus.plexus.interpolation
Class EnvarBasedValueSource
java.lang.Object
org.codehaus.plexus.interpolation.AbstractValueSource
org.codehaus.plexus.interpolation.EnvarBasedValueSource
- All Implemented Interfaces:
- ValueSource
public class EnvarBasedValueSource
- extends AbstractValueSource
ValueSource
which resolves expressions against the environment variables
available from the underlying operating system (and possibly, the shell environment
that created the present Java process). If the expression starts with 'env.',
this prefix is trimmed before resolving the rest as an environment variable name.
- Version:
- $Id: EnvarBasedValueSource.java 8252 2009-06-05 00:13:00Z igorife $
Constructor Summary |
EnvarBasedValueSource()
Create a new value source for interpolation based on shell environment variables. |
EnvarBasedValueSource(boolean caseSensitive)
Create a new value source for interpolation based on shell environment variables. |
Method Summary |
java.lang.Object |
getValue(java.lang.String expression)
If the expression starts with 'env.' then trim this prefix. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
EnvarBasedValueSource
public EnvarBasedValueSource()
throws java.io.IOException
- Create a new value source for interpolation based on shell environment variables. In this
case, envar keys ARE CASE SENSITIVE.
- Throws:
java.io.IOException
EnvarBasedValueSource
public EnvarBasedValueSource(boolean caseSensitive)
throws java.io.IOException
- Create a new value source for interpolation based on shell environment variables.
- Parameters:
caseSensitive
- Whether the environment variable key should be treated in a
case-sensitive manner for lookups
- Throws:
java.io.IOException
getValue
public java.lang.Object getValue(java.lang.String expression)
- If the expression starts with 'env.' then trim this prefix. Next, resolve
the (possibly trimmed) expression as an environment variable name against
the collection of environment variables that were read from the operating
system when this
ValueSource
instance was created.
- Parameters:
expression
- envar expression, like 'HOME' or 'env.HOME'
- Returns:
- the environment variable value for the given expression
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