org.springframework.binding.value.support
Class MethodInvokingDerivedValueModel

java.lang.Object
  org.springframework.binding.value.support.AbstractPropertyChangePublisher
      org.springframework.binding.value.support.AbstractValueModel
          org.springframework.binding.value.support.AbstractDerivedValueModel
              org.springframework.binding.value.support.MethodInvokingDerivedValueModel

All Implemented Interfaces:

DerivedValueModel, PropertyChangePublisher, ValueModel

public final class MethodInvokingDerivedValueModel
extends AbstractDerivedValueModel

A value model that derives it's value from the result of invoking a method. The parameters for the method invocation are generated from a list of "source" value models. Should any of the "source" values change the method will be invoked and if the return value has changed the value held by this class will be updated.

Author:

Oliver Hutchison

Field Summary

Fields inherited from class org.springframework.binding.value.support.AbstractValueModel

logger

Fields inherited from interface org.springframework.binding.value.ValueModel

VALUE_PROPERTY

Constructor Summary

MethodInvokingDerivedValueModel(Object target, String methodName, ValueModel[] paramSourceValueModels)

Method Summary

Object	getValue() Returns this model's value.
protected void	sourceValuesChanged() Derive the value from the source values and fire a valueChangeEvent to notify listeners.

Methods inherited from class org.springframework.binding.value.support.AbstractDerivedValueModel

getSourceValueModels, getSourceValues, isReadOnly, setValue

Methods inherited from class org.springframework.binding.value.support.AbstractValueModel

addValueChangeListener, fireValueChange, fireValueChange, fireValueChange, fireValueChange, fireValueChange, fireValueChangeEvent, fireValueChangeWhenStillEqual, getValueChangeDetector, hasValueChanged, removeValueChangeListener, setValueChangeDetector, setValueSilently

Methods inherited from class org.springframework.binding.value.support.AbstractPropertyChangePublisher

addPropertyChangeListener, addPropertyChangeListener, addVetoableChangeListener, addVetoableChangeListener, firePropertiesChanged, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, fireVetoableChange, fireVetoableChange, fireVetoableChange, fireVetoableChange, fireVetoableChange, getPropertyChangeListeners, getPropertyChangeListeners, getVetoableChangeListeners, getVetoableChangeListeners, hasChanged, hasChanged, hasChanged, hasChanged, hasChanged, hasChanged, removePropertyChangeListener, removePropertyChangeListener, removeVetoableChangeListener, removeVetoableChangeListener

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.springframework.binding.value.ValueModel

addValueChangeListener, removeValueChangeListener, setValueSilently

Constructor Detail

MethodInvokingDerivedValueModel

public MethodInvokingDerivedValueModel(Object target,
                                       String methodName,
                                       ValueModel[] paramSourceValueModels)

Method Detail

sourceValuesChanged

protected void sourceValuesChanged()

Description copied from class: AbstractDerivedValueModel

Derive the value from the source values and fire a valueChangeEvent to notify listeners.

Specified by:

sourceValuesChanged in class AbstractDerivedValueModel

getValue

public Object getValue()

Description copied from interface: ValueModel

Returns this model's value. In case of a write-only value, implementers may choose to either reject this operation or or return null or any other appropriate value.

Returns:

this model's value