Package org.codehaus.plexus.interpolation

Interface ValueSource

All Known Subinterfaces:

FeedbackEnabledValueSource, QueryEnabledValueSource

All Known Implementing Classes:

AbstractDelegatingValueSource, AbstractFunctionValueSourceWrapper, AbstractValueSource, EnvarBasedValueSource, FixedInterpolatorValueSource, MapBasedValueSource, ObjectBasedValueSource, PrefixedObjectValueSource, PrefixedPropertiesValueSource, PrefixedValueSourceWrapper, PropertiesBasedValueSource, SingleResponseValueSource

public interface ValueSource

Supplies one strategy for resolving a value for an interpolation expression. ValueSources may be stacked.

Version:

$Id$

Method Summary

Modifier and Type	Method	Description
void	clearFeedback()	Clear the feedback accumulated by a prior interpolation run.
java.util.List	getFeedback()	Return the feedback about resolution failures for a particular expression.
java.lang.Object	getValue(java.lang.String expression)

Method Detail

getValue

java.lang.Object getValue(java.lang.String expression)

Returns:

the value related to the expression, or null if not found.

getFeedback

java.util.List getFeedback()

Return the feedback about resolution failures for a particular expression.

Returns:

a combination of String and Throwable instances, where strings related to throwables are listed first.

clearFeedback

void clearFeedback()

Clear the feedback accumulated by a prior interpolation run.