//------------------------------------------------------------------------------
// Copyright (c) 2005, 2006 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 implementation
//------------------------------------------------------------------------------
package org.eclipse.epf.library.edit.navigator;

import java.util.ArrayList;
import java.util.Collection;

import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.common.notify.AdapterFactory;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.edit.command.CopyCommand.Helper;
import org.eclipse.emf.edit.domain.EditingDomain;
import org.eclipse.epf.library.edit.LibraryEditPlugin;
import org.eclipse.epf.library.edit.command.MethodElementAddCommand;
import org.eclipse.epf.uma.MethodLibrary;
import org.eclipse.epf.uma.UmaFactory;
import org.eclipse.epf.uma.UmaPackage;
import org.eclipse.epf.uma.edit.command.MethodElementCreateCopyCommand;
import org.eclipse.epf.uma.edit.command.MethodElementInitializeCopyCommand;

/**
 * The item provider adapter for a method library.
 * 
 * @author Phong Nguyen Le
 * @author Kelvin Low
 * @since 1.0
 */
public class MethodLibraryItemProvider extends
		org.eclipse.epf.uma.provider.MethodLibraryItemProvider {

	private ConfigurationsItemProvider configurations;

	//private ProcessFamiliesItemProvider procFamilies;

	/**
	 * Creates a new instance.
	 */
	public MethodLibraryItemProvider(AdapterFactory adapterFactory) {
		super(adapterFactory);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.emf.edit.provider.ItemProviderAdapter#getChildrenFeatures(java.lang.Object)
	 */
	public Collection getChildrenFeatures(Object object) {
		if (childrenFeatures == null) {
			childrenFeatures = new ArrayList();
			childrenFeatures.add(UmaPackage.eINSTANCE
					.getMethodLibrary_MethodPlugins());
		}
		return childrenFeatures;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.emf.edit.provider.ItemProviderAdapter#collectNewChildDescriptors(java.util.Collection,
	 *      java.lang.Object)
	 */
	protected void collectNewChildDescriptors(Collection newChildDescriptors,
			Object object) {
		newChildDescriptors.add(createChildParameter(UmaPackage.eINSTANCE
				.getMethodLibrary_MethodPlugins(), UmaFactory.eINSTANCE
				.createMethodPlugin()));
	}

	public Collection getChildren(Object object) {
		Collection children = super.getChildren(object);
		if (configurations == null) {
			configurations = new ConfigurationsItemProvider(adapterFactory,
					(MethodLibrary) object, LibraryEditPlugin.INSTANCE
							.getString("_UI_Configurations_text")); //$NON-NLS-1$
		}
		children.add(configurations);

		// Remove 'Process Families' until it is fully implemented
		//
		// if(procFamilies == null) {
		// procFamilies = new ProcessFamiliesItemProvider(adapterFactory,
		// (MethodLibrary) object,
		// LibraryEditPlugin.INSTANCE.getString("_UI_ProcessFamilies_text"));
		// }
		// children.add(procFamilies);

		return children;
	}

	public Object getConfigurations() {
		return configurations;
	}

	public Object getProcessFamilies() {
		//return procFamilies;
		return null;
	}

	protected Command createInitializeCopyCommand(EditingDomain domain,
			EObject owner, Helper helper) {
		return new MethodElementInitializeCopyCommand(domain, owner, helper);
	}

	protected Command createCreateCopyCommand(EditingDomain domain,
			EObject owner, Helper helper) {
		return new MethodElementCreateCopyCommand(domain, owner, helper);
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.emf.edit.provider.ItemProviderAdapter#createAddCommand(org.eclipse.emf.edit.domain.EditingDomain, org.eclipse.emf.ecore.EObject, org.eclipse.emf.ecore.EStructuralFeature, java.util.Collection, int)
	 */
	protected Command createAddCommand(EditingDomain domain, EObject owner, EStructuralFeature feature, Collection collection, int index) {
		return new MethodElementAddCommand(super.createAddCommand(domain, owner, feature, collection, index));
	}
	
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.emf.edit.provider.ItemProviderAdapter#dispose()
	 */
	public void dispose() {
		if (configurations != null) {
			configurations.dispose();
			configurations = null;
		}
		/*
		if (procFamilies != null) {
			procFamilies.dispose();
			procFamilies = null;
		}
		*/
		super.dispose();
	}

}