Package org.javarosa.core.model.data

Class PointerAnswerData

java.lang.Object

org.javarosa.core.model.data.PointerAnswerData

All Implemented Interfaces:

IAnswerData, Externalizable

public class PointerAnswerData
extends Object
implements IAnswerData

Answer data representing a pointer object. The pointer is a reference to some other object that it knows how to get out of memory.

Author:

Cory Zue

Constructor Summary

Constructors

Constructor	Description
PointerAnswerData()	NOTE: Only for serialization/deserialization
PointerAnswerData(IDataPointer data)

Method Summary

Modifier and Type	Method	Description
PointerAnswerData	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

PointerAnswerData

public PointerAnswerData()

NOTE: Only for serialization/deserialization

PointerAnswerData

public PointerAnswerData(IDataPointer data)

Method Details

clone

public IAnswerData clone()

Specified by:

clone in interface IAnswerData

Overrides:

clone in class Object

getDisplayText

public String getDisplayText()

Specified by:

getDisplayText in interface IAnswerData

Returns:

Gets a string representation of this answer

getValue

public Object getValue()

Specified by:

getValue in interface IAnswerData

Returns:

The value of this answer, will never be null

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.

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 PointerAnswerData 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