org.apache.tools.ant
public interface PropertyHelper.PropertyEvaluator extends PropertyHelper.Delegate
Can be used to look up properties in a different storage
than the project instance (like local properties for example)
or to implement custom "protocols" like Ant's
${toString:refid}
syntax.
Since: Ant 1.8.0
Method Summary | |
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Object | evaluate(String property, PropertyHelper propertyHelper)
Evaluate a property.
|
Parameters: property the property's String "identifier". propertyHelper the invoking PropertyHelper.
Returns: null if the property name could not be found, an
instance of
NullReturn
to indicate a property with a name that can be
matched but a value of null
and the property's
value otherwise.