Package org.apache.tapestry5.ioc.services

## Interface PropertyShadowBuilder

- All Known Implementing Classes:
    `PropertyShadowBuilderImpl`

      public interface PropertyShadowBuilder

  Creates a "shadow" of a property of an object. The shadow has the same type as the property, and delegates all method invocations to the property. Each method invocation on the shadow re-acquires the value of the property from the underlying object and delegates to the current value of the property. Typically, the object in question is another service, one with the "perthread" service lifecycle. This allows a global singleton to shadow a value that is specific to the current thread (and therefore, the current request).

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `<T> T` | `build​(java.lang.Object source, java.lang.String propertyName, java.lang.Class<T> propertyType)` |

- - ### Method Detail

    - #### build

          <T> T build​(java.lang.Object source,
                      java.lang.String propertyName,
                      java.lang.Class<T> propertyType)

      Type Parameters:
        `T` -
      Parameters:
        `source` - the object from which a property will be extracted
        `propertyName` - the name of a property of the object, which must be readable
        `propertyType` - the expected type of the property, the actual property type must be assignable to this type
      Returns:
        the shadow