Package org.javarosa.core.model.data

Interface IAnswerData

All Superinterfaces:
Externalizable
All Known Implementing Classes:
BooleanData, DateData, DateTimeData, DecimalData, GeoPointData, GeoShapeData, GeoTraceData, IntegerData, LongData, MultipleItemsData, MultiPointerAnswerData, PointerAnswerData, SelectMultiData, SelectOneData, StringData, TimeData, UncastData
public interface IAnswerData
extends Externalizable
An IAnswerData object represents an answer to a question posed to a user. IAnswerData objects should never in any circumstances contain a null data value. In cases of empty or non-existent responses, the IAnswerData reference should itself be null.
Author:
Drew Roos

  • Method Details

    • setValue

      void setValue​(Object o)
      Parameters:
      o - the value of this answerdata object. Cannot be null. Null Data will not overwrite existing values.
      Throws:
      NullPointerException - if o is null

    • getValue

      Object getValue()
      Returns:
      The value of this answer, will never be null

    • getDisplayText

      String getDisplayText()
      Returns:
      Gets a string representation of this answer

    • clone

      IAnswerData clone()

    • uncast

      UncastData uncast()
      Data types can be uncast if they are expected to be used in different contexts. This allows, for instance, select values to be generated by casting other types or vic-a-versa.
      Returns:
      An uncast representation of this answer which can be used in a different context.

    • cast

      IAnswerData cast​(UncastData data) throws IllegalArgumentException
      Casts the provided data into this data type.
      Parameters:
      data - An uncast data value which is compatible with this data type
      Returns:
      An instance of the instance's data type which contains that value
      Throws:
      IllegalArgumentException - If the uncast data is not in a compatible format