org.apache.tapestry5.plastic

## Interface FieldConduit<T>

- All Known Subinterfaces:
    ParameterConduit
  All Known Implementing Classes:
    ReadOnlyComponentFieldConduit

      public interface FieldConduit<T>

  A `FieldConduit` is an object that effectively replaces the field in the instantiated object. All reads and writes of the field are replaced with invocations on the conduit. Once a field's access is replaced with a conduit, the field itself is no longer used. The conduit will even see initializations of the field. In Aspect Oriented Programming terms, a FieldConduit allows you to advise read and write access to the field. If a field has both a FieldConduit and a `FieldHandle`, then the methods of the FieldHandle will be connected to the methods of the FieldConduit.

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `T` | `get(Object instance, InstanceContext context)` Invoked when the field is read.
    `void` | `set(Object instance, InstanceContext context, T newValue)` Invoked when the field's value is updated.

- - ### Method Detail

    - #### get

          T get(Object instance,
                InstanceContext context)

      Invoked when the field is read.
      Parameters:
        `instance` - the instance containing the field
        `context` - (see `ClassInstantiator.with(Class, Object)`)

    - #### set

          void set(Object instance,
                   InstanceContext context,
                   T newValue)

      Invoked when the field's value is updated.
      Parameters:
        `instance` - the instance containing the field
        `context` - (see `ClassInstantiator.with(Class, Object)`)
        `newValue` - value assigned to the field

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