org.eclipse.rmf.reqif10.pror.edit/src/org/eclipse/rmf/reqif10/pror/provider/ReqIFItemProvider.java

/*******************************************************************************
 * Copyright (c) 2011, 2013 Formal Mind GmbH and University of Dusseldorf.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     Michael Jastram - initial API and implementation
 ******************************************************************************/

package org.eclipse.rmf.reqif10.pror.provider;


import java.util.Collection;
import java.util.List;
import org.eclipse.emf.common.command.AbstractCommand;
import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.common.command.CompoundCommand;
import org.eclipse.emf.common.notify.AdapterFactory;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.common.util.ResourceLocator;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.edit.domain.EditingDomain;
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.ItemPropertyDescriptor;
import org.eclipse.emf.edit.provider.ItemProviderAdapter;
import org.eclipse.emf.edit.provider.ViewerNotification;
import org.eclipse.rmf.reqif10.ReqIF;
import org.eclipse.rmf.reqif10.ReqIF10Factory;
import org.eclipse.rmf.reqif10.ReqIF10Package;
import org.eclipse.rmf.reqif10.common.util.ReqIFToolExtensionUtil;
import org.eclipse.rmf.reqif10.pror.configuration.ProrToolExtension;

/**
 * This is the item provider adapter for a {@link org.eclipse.rmf.reqif10.ReqIF} object.
 * <!-- begin-user-doc -->
 * <!-- end-user-doc -->
 * @generated
 */
public class ReqIFItemProvider
	extends ItemProviderAdapter
	implements
		IEditingDomainItemProvider,
		IStructuredItemContentProvider,
		ITreeItemContentProvider,
		IItemLabelProvider,
		IItemPropertySource {
	/**
	 * This constructs an instance from a factory and a notifier.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public ReqIFItemProvider(AdapterFactory adapterFactory) {
		super(adapterFactory);
	}

	/**
	 * 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);

			addLangPropertyDescriptor(object);
		}
		return itemPropertyDescriptors;
	}

	/**
	 * This adds a property descriptor for the Lang feature.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected void addLangPropertyDescriptor(Object object) {
		itemPropertyDescriptors.add
			(createItemPropertyDescriptor
				(((ComposeableAdapterFactory)adapterFactory).getRootAdapterFactory(),
				 getResourceLocator(),
				 getString("_UI_ReqIF_lang_feature"),
				 getString("_UI_PropertyDescriptor_description", "_UI_ReqIF_lang_feature", "_UI_ReqIF_type"),
				 ReqIF10Package.Literals.REQ_IF__LANG,
				 true,
				 false,
				 false,
				 ItemPropertyDescriptor.GENERIC_VALUE_IMAGE,
				 null,
				 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(ReqIF10Package.Literals.REQ_IF__THE_HEADER);
			childrenFeatures.add(ReqIF10Package.Literals.REQ_IF__CORE_CONTENT);
			childrenFeatures.add(ReqIF10Package.Literals.REQ_IF__TOOL_EXTENSIONS);
		}
		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);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	protected boolean shouldComposeCreationImage() {
		return true;
	}

	@Override
	public Object getImage(Object object) {
		return overlayImage(object, getResourceLocator().getImage("full/obj16/ReqIf.png"));
	}

	/**
	 * This returns the label text for the adapted class.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public String getText(Object object) {
		String label = ((ReqIF)object).getLang();
		return label == null || label.length() == 0 ?
			getString("_UI_ReqIF_type") :
			getString("_UI_ReqIF_type") + " " + label;
	}

	/**
	 * 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(ReqIF.class)) {
			case ReqIF10Package.REQ_IF__LANG:
				fireNotifyChanged(new ViewerNotification(notification, notification.getNotifier(), false, true));
				return;
			case ReqIF10Package.REQ_IF__THE_HEADER:
			case ReqIF10Package.REQ_IF__CORE_CONTENT:
			case ReqIF10Package.REQ_IF__TOOL_EXTENSIONS:
				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
				(ReqIF10Package.Literals.REQ_IF__THE_HEADER,
				 ReqIF10Factory.eINSTANCE.createReqIFHeader()));

		newChildDescriptors.add
			(createChildParameter
				(ReqIF10Package.Literals.REQ_IF__CORE_CONTENT,
				 ReqIF10Factory.eINSTANCE.createReqIFContent()));

		newChildDescriptors.add
			(createChildParameter
				(ReqIF10Package.Literals.REQ_IF__TOOL_EXTENSIONS,
				 ReqIF10Factory.eINSTANCE.createReqIFToolExtension()));
	}

	/**
	 * Return the resource locator for this item provider's resources.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public ResourceLocator getResourceLocator() {
		return Reqif10EditPlugin.INSTANCE;
	}

	/**
	 * Handle {@link ProrToolExtension} in a special way.
	 */
	@Override
	protected Command createAddCommand(EditingDomain domain,
			final EObject owner,
			EStructuralFeature feature, Collection<?> collection, int index) {

		if (feature == ReqIF10Package.Literals.REQ_IF__TOOL_EXTENSIONS) {
			CompoundCommand compound = new CompoundCommand();
			for (final Object obj : collection) {
				Command cmd = new AbstractCommand() {
					public void execute() {
						ReqIFToolExtensionUtil.addToolExtension((ReqIF) owner,
								(EObject) obj);
					}

					public void redo() {
					}

					@Override
					public boolean canUndo() {
						return false;
					}

					@Override
					protected boolean prepare() {
						return true;
					}
				};
				compound.append(cmd);
			}
			return compound;
		}

		return super
				.createAddCommand(domain, owner, feature, collection, index);
	}

}