core/org.eclipse.stem.core/src/org/eclipse/stem/core/graph/provider/EdgeLabelItemProvider.java

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

/*******************************************************************************
 * Copyright (c) 2007 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.emf.common.notify.AdapterFactory;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.edit.provider.ComposeableAdapterFactory;
import org.eclipse.emf.edit.provider.ComposedAdapterFactory;
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.stem.core.graph.EdgeLabel;
import org.eclipse.stem.core.graph.GraphPackage;
import org.eclipse.stem.core.graph.LabelValue;

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

	/**
	 * This returns the property descriptors for the adapted class.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated NOT
	 */
	@Override
	public List<IItemPropertyDescriptor> getPropertyDescriptors(Object object) {
		if (itemPropertyDescriptors == null) {
			super.getPropertyDescriptors(object);

			addEdgePropertyDescriptor(object);
			EdgeLabelItemProvider.addCurrentValueProperties(object,itemPropertyDescriptors); // We need to add the descriptors for the current value so they show up in new modifier wizards etc. The label (not label value) is modifiable since it has the URI needed to reference it
		}
		return itemPropertyDescriptors;
	}
	
	public static void addCurrentValueProperties(Object object,
			final List<IItemPropertyDescriptor> itemPropertyDescriptors) {
		final EdgeLabel el = (EdgeLabel) object;
		final LabelValue lv = (LabelValue) el
				.eGet(GraphPackage.Literals.LABEL__CURRENT_VALUE);

		final ComposedAdapterFactory itemProviderFactory = new ComposedAdapterFactory(
				ComposedAdapterFactory.Descriptor.Registry.INSTANCE);

		final IItemPropertySource propertySource = (IItemPropertySource) itemProviderFactory
				.adapt(lv, IItemPropertySource.class);
		if (propertySource != null) {
			final List<IItemPropertyDescriptor> properties = propertySource
					.getPropertyDescriptors(lv);
			itemPropertyDescriptors.addAll(properties);
		}
	} // addCurrentValueProperties
	/**
	 * This returns the property descriptors for the adapted class.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public List<IItemPropertyDescriptor> getPropertyDescriptorsGen(Object object) {
		if (itemPropertyDescriptors == null) {
			super.getPropertyDescriptors(object);

			addEdgePropertyDescriptor(object);
		}
		return itemPropertyDescriptors;
	}

	/**
	 * This adds a property descriptor for the Edge feature.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected void addEdgePropertyDescriptor(Object object) {
		itemPropertyDescriptors.add
			(createItemPropertyDescriptor
				(((ComposeableAdapterFactory)adapterFactory).getRootAdapterFactory(),
				 getResourceLocator(),
				 getString("_UI_EdgeLabel_edge_feature"), //$NON-NLS-1$
				 getString("_UI_PropertyDescriptor_description", "_UI_EdgeLabel_edge_feature", "_UI_EdgeLabel_type"), //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
				 GraphPackage.Literals.EDGE_LABEL__EDGE,
				 true,
				 false,
				 true,
				 null,
				 null,
				 null));
	}

	/**
	 * This returns the label text for the adapted class.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public String getText(Object object) {
		URI labelValue = ((EdgeLabel)object).getURI();
		String label = labelValue == null ? null : labelValue.toString();
		return label == null || label.length() == 0 ?
			getString("_UI_EdgeLabel_type") : //$NON-NLS-1$
			getString("_UI_EdgeLabel_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);
		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);
	}

}