plugins/org.eclipse.gmf.map.edit/src/org/eclipse/gmf/mappings/provider/ExpressionLabelMappingItemProvider.java

/**
 * <copyright>
 * </copyright>
 *
 * $Id$
 */
package org.eclipse.gmf.mappings.provider;


import java.util.Collection;
import java.util.List;

import org.eclipse.emf.common.notify.AdapterFactory;
import org.eclipse.emf.common.notify.Notification;

import org.eclipse.emf.ecore.EStructuralFeature;

import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
import org.eclipse.emf.edit.provider.IEditingDomainItemProvider;
import org.eclipse.emf.edit.provider.IItemLabelProvider;
import org.eclipse.emf.edit.provider.IItemPropertyDescriptor;
import org.eclipse.emf.edit.provider.IItemPropertySource;
import org.eclipse.emf.edit.provider.IStructuredItemContentProvider;
import org.eclipse.emf.edit.provider.ITreeItemContentProvider;
import org.eclipse.emf.edit.provider.ViewerNotification;

import org.eclipse.gmf.mappings.ExpressionLabelMapping;
import org.eclipse.gmf.mappings.GMFMapFactory;
import org.eclipse.gmf.mappings.GMFMapPackage;

/**
 * This is the item provider adapter for a {@link org.eclipse.gmf.mappings.ExpressionLabelMapping} object.
 * <!-- begin-user-doc -->
 * <!-- end-user-doc -->
 * @generated
 */
public class ExpressionLabelMappingItemProvider
	extends LabelMappingItemProvider
	implements
		IEditingDomainItemProvider,
		IStructuredItemContentProvider,
		ITreeItemContentProvider,
		IItemLabelProvider,
		IItemPropertySource {
	/**
	 * This constructs an instance from a factory and a notifier.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public ExpressionLabelMappingItemProvider(AdapterFactory adapterFactory) {
		super(adapterFactory);
	}

	@Override
	protected boolean shouldComposeCreationImage() {
		/*
		 * Note, this allows not to keep generated createChild images:
		 * ExpressionLabelMapping_<feature>_[ValueExpression|Constraint]
		 * and use ValueExpression/Constraint icons instead.
		 */
		return true;
	}
	
	/**
	 * This returns the property descriptors for the adapted class.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public List<IItemPropertyDescriptor> getPropertyDescriptors(Object object) {
		if (itemPropertyDescriptors == null) {
			super.getPropertyDescriptors(object);

			addViewExpressionPropertyDescriptor(object);
		}
		return itemPropertyDescriptors;
	}

	/**
	 * This adds a property descriptor for the View Expression feature.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected void addViewExpressionPropertyDescriptor(Object object) {
		itemPropertyDescriptors.add
			(createItemPropertyDescriptor
				(((ComposeableAdapterFactory)adapterFactory).getRootAdapterFactory(),
				 getResourceLocator(),
				 getString("_UI_ExpressionLabelMapping_viewExpression_feature"),
				 getString("_UI_ExpressionLabelMapping_viewExpression_description"),
				 GMFMapPackage.eINSTANCE.getExpressionLabelMapping_ViewExpression(),
				 true,
				 false,
				 false,
				 null,
				 getString("_UI_VisualrepresentationPropertyCategory"),
				 null));
	}

	/**
	 * This specifies how to implement {@link #getChildren} and is used to deduce an appropriate feature for an
	 * {@link org.eclipse.emf.edit.command.AddCommand}, {@link org.eclipse.emf.edit.command.RemoveCommand} or
	 * {@link org.eclipse.emf.edit.command.MoveCommand} in {@link #createCommand}.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public Collection<? extends EStructuralFeature> getChildrenFeatures(Object object) {
		if (childrenFeatures == null) {
			super.getChildrenFeatures(object);
			childrenFeatures.add(GMFMapPackage.eINSTANCE.getExpressionLabelMapping_ViewExpression());
			childrenFeatures.add(GMFMapPackage.eINSTANCE.getExpressionLabelMapping_EditExpression());
			childrenFeatures.add(GMFMapPackage.eINSTANCE.getExpressionLabelMapping_ValidateExpression());
		}
		return childrenFeatures;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	protected EStructuralFeature getChildFeature(Object object, Object child) {
		// Check the type of the specified child object and return the proper feature to use for
		// adding (see {@link AddCommand}) it as a child.

		return super.getChildFeature(object, child);
	}

	/**
	 * This returns ExpressionLabelMapping.gif.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public Object getImage(Object object) {
		return overlayImage(object, getResourceLocator().getImage("full/obj16/ExpressionLabelMapping"));
	}

	/**
	 * This returns the label text for the adapted class.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public String getText(Object object) {
		ExpressionLabelMapping expressionLabelMapping = (ExpressionLabelMapping)object;
		return getString("_UI_ExpressionLabelMapping_type") + " " + expressionLabelMapping.isReadOnly();
	}

	/**
	 * This handles model notifications by calling {@link #updateChildren} to update any cached
	 * children and by creating a viewer notification, which it passes to {@link #fireNotifyChanged}.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public void notifyChanged(Notification notification) {
		updateChildren(notification);

		switch (notification.getFeatureID(ExpressionLabelMapping.class)) {
			case GMFMapPackage.EXPRESSION_LABEL_MAPPING__VIEW_EXPRESSION:
			case GMFMapPackage.EXPRESSION_LABEL_MAPPING__EDIT_EXPRESSION:
			case GMFMapPackage.EXPRESSION_LABEL_MAPPING__VALIDATE_EXPRESSION:
				fireNotifyChanged(new ViewerNotification(notification, notification.getNotifier(), true, false));
				return;
		}
		super.notifyChanged(notification);
	}

	/**
	 * This adds {@link org.eclipse.emf.edit.command.CommandParameter}s describing the children
	 * that can be created under this object.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	protected void collectNewChildDescriptors(Collection<Object> newChildDescriptors, Object object) {
		super.collectNewChildDescriptors(newChildDescriptors, object);

		newChildDescriptors.add
			(createChildParameter
				(GMFMapPackage.eINSTANCE.getExpressionLabelMapping_ViewExpression(),
				 GMFMapFactory.eINSTANCE.createValueExpression()));

		newChildDescriptors.add
			(createChildParameter
				(GMFMapPackage.eINSTANCE.getExpressionLabelMapping_ViewExpression(),
				 GMFMapFactory.eINSTANCE.createConstraint()));

		newChildDescriptors.add
			(createChildParameter
				(GMFMapPackage.eINSTANCE.getExpressionLabelMapping_EditExpression(),
				 GMFMapFactory.eINSTANCE.createValueExpression()));

		newChildDescriptors.add
			(createChildParameter
				(GMFMapPackage.eINSTANCE.getExpressionLabelMapping_EditExpression(),
				 GMFMapFactory.eINSTANCE.createConstraint()));

		newChildDescriptors.add
			(createChildParameter
				(GMFMapPackage.eINSTANCE.getExpressionLabelMapping_ValidateExpression(),
				 GMFMapFactory.eINSTANCE.createConstraint()));
	}

	/**
	 * This returns the label text for {@link org.eclipse.emf.edit.command.CreateChildCommand}.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public String getCreateChildText(Object owner, Object feature, Object child, Collection<?> selection) {
		Object childFeature = feature;
		Object childObject = child;

		boolean qualify =
			childFeature == GMFMapPackage.eINSTANCE.getExpressionLabelMapping_ViewExpression() ||
			childFeature == GMFMapPackage.eINSTANCE.getExpressionLabelMapping_EditExpression() ||
			childFeature == GMFMapPackage.eINSTANCE.getExpressionLabelMapping_ValidateExpression();

		if (qualify) {
			return getString
				("_UI_CreateChild_text2",
				 new Object[] { getTypeText(childObject), getFeatureText(childFeature), getTypeText(owner) });
		}
		return super.getCreateChildText(owner, feature, child, selection);
	}

}