/*******************************************************************************
 * Copyright (c) 2004, 2005 Sybase, Inc. 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:
 *     Sybase, Inc. - initial API and implementation
 *******************************************************************************/

package org.eclipse.jst.jsf.facesconfig.ui.provider;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.core.resources.IProject;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jst.jsf.core.IJSFCoreConstants;
import org.eclipse.jst.jsf.core.jsfappconfig.JSFAppConfigUtils;
import org.eclipse.jst.jsf.facesconfig.emf.FacesConfigType;
import org.eclipse.jst.jsf.facesconfig.emf.ManagedBeanType;
import org.eclipse.jst.jsf.facesconfig.ui.section.ManagedBeanScopeTreeItem;

/**
 * Managed bean Content Provider.
 * <p>
 * <b>Provides grouping by Scope.</b>
 * </p>
 * 
 * @author Xiao-guang Zhang, sfshi
 * @version 1.5
 */
public class ManagedBeanContentProvider implements ITreeContentProvider {

	private IProject project;
	private List scopeItemList = null;

	/**
	 * Creates an instance.
	 */
	public ManagedBeanContentProvider() {
		this(null);
	}

	/**
	 * Creates an instance.
	 * @param project Current project instance.
	 */
	public ManagedBeanContentProvider(IProject project) {
		this.project = project;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.viewers.ITreeContentProvider#getChildren(Object
	 *      parent)
	 */
	public Object[] getChildren(Object parent) {

		if (parent instanceof FacesConfigType) {
			if (scopeItemList == null) {
				scopeItemList = new ArrayList();
				//Bug 312727 - [JSF2.0] Add view scope to FacesConfigEditor for Managed Beans
				String[] scopeItems = ManagedBeanScopeTreeItem.scopeItems;
				if (project != null) {
					if (!JSFAppConfigUtils.isValidJSFProject(project, IJSFCoreConstants.FACET_VERSION_2_0)) {
						scopeItems = ManagedBeanScopeTreeItem.scopeItemsPreJSF2;
					}
				}
				for (int i = 0; i < scopeItems.length; i++) {
					ManagedBeanScopeTreeItem scopeTreeItem = new ManagedBeanScopeTreeItem(
							scopeItems[i],
							(FacesConfigType) parent);
					scopeItemList.add(scopeTreeItem);
				}
			}
			return scopeItemList.toArray();
		} else if (parent instanceof ManagedBeanScopeTreeItem) {
			return ((ManagedBeanScopeTreeItem) parent).getChildren().toArray();
		}

		return new Object[0];
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.viewers.ITreeContentProvider#getElements(Object
	 *      parent)
	 */
	public Object[] getElements(Object inputElement) {
		return getChildren(inputElement);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.viewers.ITreeContentProvider#getParent(java.lang.Object)
	 */
	public Object getParent(Object element) {
		if (element instanceof ManagedBeanScopeTreeItem) {
			return ((ManagedBeanScopeTreeItem) element).getParent();
		} else if (element instanceof ManagedBeanType) {
			String scope = null;
			if (((ManagedBeanType) element).getManagedBeanScope() != null) {
				scope = ((ManagedBeanType) element).getManagedBeanScope()
						.getTextContent();
			}

			if (scope != null) {
				for (int i = 0; i < scopeItemList.size(); i++) {
					if (((ManagedBeanScopeTreeItem) scopeItemList.get(i))
							.getScope().equals(scope)) {
						return scopeItemList.get(i);
					}

				}
			}
		}

		return null;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.viewers.ITreeContentProvider#hasChildren(java.lang.Object)
	 */
	public boolean hasChildren(Object element) {
		if (element instanceof FacesConfigType) {
			return true;
		} else if (element instanceof ManagedBeanScopeTreeItem) {
			return ((ManagedBeanScopeTreeItem) element).hasChildren();
		}
		return false;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.viewers.IContentProvider#dispose()
	 */
	public void dispose() {
		// TODO Auto-generated method stub

	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer,
	 *      java.lang.Object, java.lang.Object)
	 */
	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
		if (newInput != null) {
//			initialize(newInput);
		}
	}

}