Package org.javarosa.core.model.data

Class SelectOneData

java.lang.Object

org.javarosa.core.model.data.SelectOneData

All Implemented Interfaces:

IAnswerData, Externalizable

public class SelectOneData
extends Object
implements IAnswerData

A response to a question requesting a selection of one and only one item from a list

Author:

Drew Roos

Constructor Summary

Constructors

Constructor	Description
SelectOneData()	Empty Constructor, necessary for dynamic construction during deserialization.
SelectOneData(Selection s)

Method Summary

Modifier and Type	Method	Description
SelectOneData	cast(UncastData data)	Casts the provided data into this data type.
IAnswerData	clone()
String	getDisplayText()
Object	getValue()
void	readExternal(DataInputStream in, PrototypeFactory pf)
void	setValue(Object o)
UncastData	uncast()	Data types can be uncast if they are expected to be used in different contexts.
void	writeExternal(DataOutputStream out)

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

SelectOneData

public SelectOneData()

Empty Constructor, necessary for dynamic construction during deserialization. Shouldn't be used otherwise.

SelectOneData

public SelectOneData(Selection s)

Method Details

clone

public IAnswerData clone()

Specified by:

clone in interface IAnswerData

Overrides:

clone in class Object

setValue

public void setValue(Object o)

Specified by:

setValue in interface IAnswerData

Parameters:

o - the value of this answerdata object. Cannot be null. Null Data will not overwrite existing values.

getValue

public Object getValue()

Specified by:

getValue in interface IAnswerData

Returns:

The value of this answer, will never be null

getDisplayText

public String getDisplayText()

Specified by:

getDisplayText in interface IAnswerData

Returns:

Gets a string representation of this answer

readExternal

public void readExternal(DataInputStream in, PrototypeFactory pf) throws IOException, DeserializationException

Specified by:

readExternal in interface Externalizable

Throws:

IOException

DeserializationException

writeExternal

public void writeExternal(DataOutputStream out) throws IOException

Specified by:

writeExternal in interface Externalizable

Throws:

IOException

uncast

public UncastData uncast()

Description copied from interface: IAnswerData

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.

Specified by:

uncast in interface IAnswerData

Returns:

An uncast representation of this answer which can be used in a different context.

cast

public SelectOneData cast(UncastData data) throws IllegalArgumentException

Description copied from interface: IAnswerData

Casts the provided data into this data type.

Specified by:

cast in interface IAnswerData

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