net.sf.cuf.model

Class UnmodifiableValueHolder<T>

java.lang.Object

net.sf.cuf.model.AbstractValueModel<T>

net.sf.cuf.model.UnmodifiableValueHolder<T>

Type Parameters:

T - the type we hold

All Implemented Interfaces:

DelegateAccess, ExternalUpdate, ValueModel<T>

public class UnmodifiableValueHolder<T>
extends AbstractValueModel<T>
implements DelegateAccess

A ValueHolder object holds a value (any Object) determined by the constructor. The value can be accessed via getValue() but not be changed via setValue(). However, if the value is an object with attributes, the object's value may be changed. If that happens, you should call AbstractValueModel.signalExternalUpdate() afterwards so the listeners can be notified.

Constructor Summary

Constructors

Constructor and Description
UnmodifiableValueHolder() Create a new holder with NULL as its value.
UnmodifiableValueHolder(T pValue) Create a new holder with the handed object as its value.

Method Summary

Methods

Modifier and Type	Method and Description
T	getValue() Get the current value, during a callback this is the new value.
Object	getValue(Object pValue) Transform the handed value to a new value.
boolean	isEditable() Returns always false
void	setValue(T pValue, boolean pIsSetForced) Throws an exception.

Methods inherited from class net.sf.cuf.model.AbstractValueModel

addChangeListener, booleanValue, checkDisposed, dispose, doubleValue, fireStateChanged, floatValue, getDependents, getName, intValue, isDisposed, isInSetValue, isSetForced, longValue, onChangeSend, removeChangeListener, retractInterestsFor, setInSetValue, setName, setObjectValue, setValue, setValue, setValue, setValue, setValue, setValue, setValueForced, signalExternalUpdate, stringValue

Methods inherited from class java.lang.Object

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

Constructor Detail

UnmodifiableValueHolder

public UnmodifiableValueHolder()

Create a new holder with NULL as its value.

UnmodifiableValueHolder

public UnmodifiableValueHolder(T pValue)

Create a new holder with the handed object as its value.

Parameters:

pValue - the value we hold, may be null

Method Detail

isEditable

public boolean isEditable()

Returns always false

Specified by:

isEditable in interface ValueModel<T>

Returns:

false

setValue

public void setValue(T pValue,
            boolean pIsSetForced)

Throws an exception.

Specified by:

setValue in interface ValueModel<T>

Parameters:

pValue - ignored

pIsSetForced - ignored

Throws:

UnsupportedOperationException - always

getValue

public T getValue()

Get the current value, during a callback this is the new value.

Specified by:

getValue in interface ValueModel<T>

Returns:

null or the value object

getValue

public Object getValue(Object pValue)

Transform the handed value to a new value. This should not change the current value or trigger any updates.

Specified by:

getValue in interface DelegateAccess

Parameters:

pValue - the value we should assume as our value

Returns:

pValue