core/org.eclipse.stem.core/src/org/eclipse/stem/core/trigger/provider/TriggerItemProvider.java

package org.eclipse.stem.core.trigger.provider;

/*******************************************************************************
 * Copyright (c) 2008 IBM Corporation and others.
 * 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

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

import org.eclipse.core.resources.IFile;
import org.eclipse.emf.common.command.Command;
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.common.util.URI;
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.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.stem.core.Utility;
import org.eclipse.stem.core.common.Identifiable;
import org.eclipse.stem.core.common.provider.CoreEditPlugin;
import org.eclipse.stem.core.model.Decorator;
import org.eclipse.stem.core.model.provider.DecoratorItemProvider;
import org.eclipse.stem.core.predicate.Predicate;
import org.eclipse.stem.core.trigger.Trigger;
import org.eclipse.stem.core.trigger.TriggerPackage;
import org.eclipse.swt.dnd.DND;

/**
 * This is the item provider adapter for a {@link org.eclipse.stem.core.trigger.Trigger} object.
 * <!-- begin-user-doc -->
 * <!-- end-user-doc -->
 * @generated
 */
public class TriggerItemProvider
	extends DecoratorItemProvider
	implements
		IEditingDomainItemProvider,
		IStructuredItemContentProvider,
		ITreeItemContentProvider,
		IItemLabelProvider,
		IItemPropertySource {
	/**
	 * This constructs an instance from a factory and a notifier.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public TriggerItemProvider(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);

		}
		return itemPropertyDescriptors;
	}

	/**
	 * 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(TriggerPackage.Literals.TRIGGER__PREDICATE);
			childrenFeatures.add(TriggerPackage.Literals.TRIGGER__ACTIONS);
		}
		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 Trigger.gif.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated NOT
	 */
	@Override
	public Object getImage(Object object) {
		return overlayImage(object, getResourceLocator().getImage("full/customobj16/Trigger"));
	}
	
	/**
	 * This returns Trigger.gif.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public Object getImageGen(Object object) {
		return overlayImage(object, getResourceLocator().getImage("full/obj16/Trigger")); //$NON-NLS-1$
	}

	/**
	 * This returns the label text for the adapted class.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated NOT
	 */
	@Override
	public String getText(Object object) {
		return super.getText(object);
		}
	
	/**
	 * This returns the label text for the adapted class.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public String getTextGen(Object object) {
		URI labelValue = ((Trigger)object).getURI();
		String label = labelValue == null ? null : labelValue.toString();
		return label == null || label.length() == 0 ?
			getString("_UI_Trigger_type") : //$NON-NLS-1$
			getString("_UI_Trigger_type") + " " + label; //$NON-NLS-1$ //$NON-NLS-2$
	}
	

	/**
	 * 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(Trigger.class)) {
			case TriggerPackage.TRIGGER__PREDICATE:
			case TriggerPackage.TRIGGER__ACTIONS:
				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);
	}

	/**
	 * @see org.eclipse.emf.edit.provider.ItemProviderAdapter#createSetCommand(org.eclipse.emf.edit.domain.EditingDomain,
	 *      org.eclipse.emf.ecore.EObject,
	 *      org.eclipse.emf.ecore.EStructuralFeature, java.lang.Object, int)
	 */
	@Override
	protected Command createSetCommand(EditingDomain domain, EObject owner,
			EStructuralFeature feature, Object value, int index) {
		// Are we setting the model during a drag and drop?
		Object temp = value;

		if (value instanceof IFile) {
			// Yes
			final IFile iFile = (IFile) value;
			final URI uri = URI.createFileURI(iFile.getLocation().toString());
			final Identifiable identifable = Utility.getIdentifiable(uri);
			temp = identifable;
		} // if IFile

		else if (value instanceof String) {
			// Yes
			// These come from IdentifablePluginView
			final String uriString = (String) value;
			try {
				final URI uri = URI.createURI(uriString);
				final Identifiable identifable = Utility.getIdentifiable(uri);
				temp = identifable;
			} catch (Exception e) {
				// Ignore it
			}
		} // if String

		if (temp instanceof Predicate) {
			return super.createSetCommand(domain, owner,
					TriggerPackage.eINSTANCE.getTrigger_Predicate(), temp, index);
		} else if (temp instanceof Decorator) {
			return super.createSetCommand(domain, owner,
					TriggerPackage.eINSTANCE.getTrigger_Actions(), temp,
					index);
		} // if
		else {
			return super.createSetCommand(domain, owner, feature, value, index);
		}
	} // createSetCommand
	
	/**
	 * @see org.eclipse.emf.edit.provider.ItemProviderAdapter#createDragAndDropCommand(org.eclipse.emf.edit.domain.EditingDomain,
	 *      java.lang.Object, float, int, int, java.util.Collection)
	 */
	@Override
	protected Command createDragAndDropCommand(EditingDomain domain,
			Object owner, float location, int operations, int operation,
			Collection<?> collection) {
		// We add DND.DROP_LINK as an allowed operation because all drops will
		// be links and some sources don't allow links, we convert to links
		// anyway
		return super.createDragAndDropCommand(domain, owner, location,
				operations | DND.DROP_LINK, operation, collection);
	} // createDragAndDropCommand
	
	/**
	 * @see org.eclipse.emf.edit.provider.ItemProviderAdapter#isWrappingNeeded(java.lang.Object)
	 */
	@Override
	protected boolean isWrappingNeeded(Object object) {
		// return super.isWrappingNeeded(object);
		// We return true so that non-containment references are wrapped. This
		// enables the delete command in the editor's context menu.
		return true;
	} // isWrappingNeeded
	
	/**
	 * Return the resource locator for this item provider's resources.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public ResourceLocator getResourceLocator() {
		return CoreEditPlugin.INSTANCE;
	}

}