org.eclipse.emf.edit.provider
Class WrapperItemProvider.WrapperItemPropertyDescriptor

java.lang.Object
  org.eclipse.emf.edit.provider.ItemPropertyDescriptor
      org.eclipse.emf.edit.provider.WrapperItemProvider.WrapperItemPropertyDescriptor

All Implemented Interfaces:

IItemPropertyDescriptor, IItemPropertyDescriptor.OverrideableCommandOwner

Enclosing class:

WrapperItemProvider

protected class WrapperItemProvider.WrapperItemPropertyDescriptor
extends ItemPropertyDescriptor

An item property descriptor for the single property of a wrapper for a simple value. This extends the base implementation and substitutes the wrapper's owner for the selected object (the wrapper itself) in the call to getPropertyValue. Thus, the owner must be an EObject to use this class. The property's name, description, settable flag, static image, category, and filter flags are obtained by calling out to various template methods, so can be easily changed by deriving a subclass.

Nested Class Summary

Nested classes/interfaces inherited from class org.eclipse.emf.edit.provider.ItemPropertyDescriptor

ItemPropertyDescriptor.ItemDelegator, ItemPropertyDescriptor.PropertyValueWrapper

Nested classes/interfaces inherited from interface org.eclipse.emf.edit.provider.IItemPropertyDescriptor

IItemPropertyDescriptor.OverrideableCommandOwner

Field Summary

Fields inherited from class org.eclipse.emf.edit.provider.ItemPropertyDescriptor

adapterFactory, BOOLEAN_VALUE_IMAGE, category, commandOwner, description, displayName, ecorePackage, feature, filterFlags, GENERIC_VALUE_IMAGE, INTEGRAL_VALUE_IMAGE, isSettable, itemDelegator, multiLine, parentReferences, REAL_VALUE_IMAGE, resourceLocator, sortChoices, staticImage, TEXT_VALUE_IMAGE

Constructor Summary

WrapperItemProvider.WrapperItemPropertyDescriptor(ResourceLocator resourceLocator, EStructuralFeature feature)

Method Summary

boolean	canSetProperty(java.lang.Object object) Substitutes the wrapper owner for the selected object and invokes the base implementation.
protected Command	createSetCommand(EditingDomain domain, java.lang.Object owner, java.lang.Object feature, java.lang.Object value) Returns a command that will set the value on the model object.
java.util.Collection<?>	getChoiceOfValues(java.lang.Object object) Substitutes the wrapper owner for the selected object and invokes the base implementation.
java.lang.Object	getPropertyValue(java.lang.Object object) Substitutes the wrapper owner for the selected object and invokes the base implementation.
protected java.lang.Object	getValue(EObject object, EStructuralFeature feature) Returns a value from a model object.
boolean	isMany(java.lang.Object object) Returns false, as the property only represents a single value, even if the feature is multi-valued.
boolean	isPropertySet(java.lang.Object object) Returns true, as the property of a value wrapper is always considered to be set.
void	resetPropertyValue(java.lang.Object object) Does nothing, as resetting the property of a value wrapper is not meaningful.
void	setPropertyValue(java.lang.Object object, java.lang.Object value) Sets the property value.
protected void	setValue(EObject object, EStructuralFeature feature, java.lang.Object value) Sets a value on a model object.

Methods inherited from class org.eclipse.emf.edit.provider.ItemPropertyDescriptor

collectReachableObjectsOfType, createPropertyValueWrapper, getCategory, getComboBoxObjects, getCommandOwner, getCommandOwner, getDefaultId, getDefaultValue, getDescription, getDisplayName, getEditingDomain, getFeature, getFilterFlags, getHelpContextIds, getId, getLabelProvider, getReachableObjectsOfType, isCompatibleWith, isMultiLine, isSortChoices, setCommandOwner

Methods inherited from class java.lang.Object

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

Constructor Detail

WrapperItemProvider.WrapperItemPropertyDescriptor

public WrapperItemProvider.WrapperItemPropertyDescriptor(ResourceLocator resourceLocator,
                                                         EStructuralFeature feature)

Method Detail

getPropertyValue

public java.lang.Object getPropertyValue(java.lang.Object object)

Substitutes the wrapper owner for the selected object and invokes the base implementation. The actual value returned depends on the implementation of getValue.

Specified by:

getPropertyValue in interface IItemPropertyDescriptor

Overrides:

getPropertyValue in class ItemPropertyDescriptor

canSetProperty

public boolean canSetProperty(java.lang.Object object)

Substitutes the wrapper owner for the selected object and invokes the base implementation.

Specified by:

canSetProperty in interface IItemPropertyDescriptor

Overrides:

canSetProperty in class ItemPropertyDescriptor

isPropertySet

public boolean isPropertySet(java.lang.Object object)

Returns true, as the property of a value wrapper is always considered to be set.

Specified by:

isPropertySet in interface IItemPropertyDescriptor

Overrides:

isPropertySet in class ItemPropertyDescriptor

resetPropertyValue

public void resetPropertyValue(java.lang.Object object)

Does nothing, as resetting the property of a value wrapper is not meaningful.

Specified by:

resetPropertyValue in interface IItemPropertyDescriptor

Overrides:

resetPropertyValue in class ItemPropertyDescriptor

setPropertyValue

public void setPropertyValue(java.lang.Object object,
                             java.lang.Object value)

Sets the property value. If an editing domain can be obtained, the command returned by createSetcommand is executed; otherwise, setValue is called to set the value.

Specified by:

setPropertyValue in interface IItemPropertyDescriptor

Overrides:

setPropertyValue in class ItemPropertyDescriptor

getValue

protected java.lang.Object getValue(EObject object,
                                    EStructuralFeature feature)

Returns a value from a model object. If the feature is multi-valued, only the single value that the wrapper represents is returned.

Overrides:

getValue in class ItemPropertyDescriptor

setValue

protected void setValue(EObject object,
                        EStructuralFeature feature,
                        java.lang.Object value)

Sets a value on a model object. If the feature is multi-valued, only the single value that the wrapper represents is set.

createSetCommand

protected Command createSetCommand(EditingDomain domain,
                                   java.lang.Object owner,
                                   java.lang.Object feature,
                                   java.lang.Object value)

Returns a command that will set the value on the model object. The wrapper is used as the owner of the command, unless overridden, so that it can specialize the command that eventually gets created.

isMany

public boolean isMany(java.lang.Object object)

Returns false, as the property only represents a single value, even if the feature is multi-valued.

Specified by:

isMany in interface IItemPropertyDescriptor

Overrides:

isMany in class ItemPropertyDescriptor

getChoiceOfValues

public java.util.Collection<?> getChoiceOfValues(java.lang.Object object)

Substitutes the wrapper owner for the selected object and invokes the base implementation.

Specified by:

getChoiceOfValues in interface IItemPropertyDescriptor

Overrides:

getChoiceOfValues in class ItemPropertyDescriptor