/*******************************************************************************
 * Copyright (c) 2004, 2006 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.util;

import java.util.Iterator;
import java.util.List;

import org.eclipse.core.resources.IProject;
import org.eclipse.jst.jsf.facesconfig.emf.FacesConfigType;
import org.eclipse.jst.jsf.facesconfig.emf.ManagedBeanType;
import org.eclipse.jst.jsf.facesconfig.util.FacesConfigArtifactEdit;

/**
 * 
 * @author sfshi
 * 
 */
public class ManagedBeanUtil {

	/**
	 * Determines if the new bean to be added is already a member of the
	 * configuration set.
	 * 
	 * @param beanName -
	 *            The name of the bean being added
	 * @return int - 0 if bean doesn't exist, otherwise the choice from the
	 *         Duplicate Bean dialog
	 */
	public static boolean isBeanDuplicate(IProject project, String beanName) {
		// TODO we may need to consider the managed bean declared in other
		// faces config file in the project, not only the default faces config
		// file.
		FacesConfigArtifactEdit artifactEdit = FacesConfigArtifactEdit
				.getFacesConfigArtifactEditForRead(project);
		if (artifactEdit != null) {
			FacesConfigType facesConfig = artifactEdit.getFacesConfig();
			List beans = facesConfig.getManagedBean();

			// Iterate through the bean list
			for (Iterator i = beans.iterator(); i.hasNext();) {
				Object o = i.next();
				if (o instanceof ManagedBeanType) {
					ManagedBeanType mbti = (ManagedBeanType) o;
					if (mbti.getManagedBeanName() != null) {
						String name = mbti.getManagedBeanName()
								.getTextContent();
						if (name != null && name.equals(beanName)) {
							return true;
						}
					}
				}
			}

		}
		return false;
	}

	/**
	 * get the default managed bean name in the current project according to
	 * reference name
	 * 
	 * @param project -
	 *            current project
	 * @param refName -
	 *            seed reference name
	 * @return String - default managed bean name
	 */
	public static String getDefaultManagedBeanName(IProject project,
			String refName) {
		String defaultName = refName;

		int newRefNameIndex = 1;
		while (isBeanDuplicate(project, defaultName)) {
			defaultName = refName + newRefNameIndex;
			newRefNameIndex++;
		}
		return defaultName;
	}
}