org.codehaus.plexus.evaluator
Interface ExpressionEvaluator

All Known Implementing Classes:

DefaultExpressionEvaluator

public interface ExpressionEvaluator

ExpressionEvaluator

Version:

$Id: ExpressionEvaluator.java 4591 2006-11-06 20:26:47Z handyande $

Author:

Joakim Erdfelt

Field Summary

static java.lang.String

ROLE

Method Summary

void	addExpressionSource(ExpressionSource source) Add a source for expression resolution.
java.lang.String	expand(java.lang.String str) Evaluate a string, and expand expressions as needed.
java.util.List	getExpressionSourceList() Get the List of expression sources.
boolean	removeExpressionSource(ExpressionSource source) Remove a specific expression source.

Field Detail

ROLE

public static final java.lang.String ROLE

Method Detail

addExpressionSource

public void addExpressionSource(ExpressionSource source)

Add a source for expression resolution.

Parameters:

source - the source to add.

expand

public java.lang.String expand(java.lang.String str)
                        throws EvaluatorException

Evaluate a string, and expand expressions as needed.

Parameters:

str - the expression

Returns:

the value of the expression

Throws:

EvaluatorException - if a problem occurs whilst evaluating

getExpressionSourceList

public java.util.List getExpressionSourceList()

Get the List of expression sources.

Returns:

the list of expression sources.

removeExpressionSource

public boolean removeExpressionSource(ExpressionSource source)

Remove a specific expression source.

Parameters:

source - the source to remove.

Returns:

true if expression source was removed.