Package org.apache.tools.ant

Interface PropertyHelper.PropertyEvaluator

All Superinterfaces:
PropertyHelper.Delegate
All Known Implementing Classes:
LocalProperties
Enclosing class:
PropertyHelper
public static interface PropertyHelper.PropertyEvaluator
extends PropertyHelper.Delegate
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 Summary

    Modifier and Type Method Description
    java.lang.Object evaluate​(java.lang.String property, PropertyHelper propertyHelper)
    Evaluate a property.

  • Method Details

    • evaluate

      java.lang.Object evaluate​(java.lang.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.