Package org.apache.tools.ant
Interface PropertyHelper.PropertyEvaluator
- All Superinterfaces:
- PropertyHelper.Delegate
- All Known Implementing Classes:
- LocalProperties
- Enclosing class:
- PropertyHelper
Looks up a property's value based on its name.
 
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 SummaryModifier and TypeMethodDescriptionevaluate(String property, PropertyHelper propertyHelper) Evaluate a property.
- 
Method Details- 
evaluateEvaluate 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 NullReturnto indicate a property with a name that can be matched but a value ofnulland the property's value otherwise.
 
 
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