Here you can find the source of isSimpleClass(Class> clazz)
public static boolean isSimpleClass(Class<?> clazz)
//package com.java2s; /**/*from w w w. ja v a2 s . c o m*/ * * Copyright 2010 Vitalii Tymchyshyn * This file is part of EsORM. * * EsORM is free software: you can redistribute it and/or modify * it under the terms of the Lesser GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * EsORM is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with EsORM. If not, see <http://www.gnu.org/licenses/>. */ import java.util.*; public class Main { public static boolean isSimpleClass(Class<?> clazz) { return clazz.isPrimitive() || clazz.isEnum() || String.class.isAssignableFrom(clazz) || Number.class.isAssignableFrom(clazz) || String.class.isAssignableFrom(clazz) || Boolean.class.isAssignableFrom(clazz) || Date.class.isAssignableFrom(clazz) || Calendar.class.isAssignableFrom(clazz) || UUID.class.isAssignableFrom(clazz); } }