1 /** 2 * This file Copyright (c) 2010-2013 Magnolia International 3 * Ltd. (http://www.magnolia-cms.com). All rights reserved. 4 * 5 * 6 * This file is dual-licensed under both the Magnolia 7 * Network Agreement and the GNU General Public License. 8 * You may elect to use one or the other of these licenses. 9 * 10 * This file is distributed in the hope that it will be 11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the 12 * implied warranty of MERCHANTABILITY or FITNESS FOR A 13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT. 14 * Redistribution, except as permitted by whichever of the GPL 15 * or MNA you select, is prohibited. 16 * 17 * 1. For the GPL license (GPL), you can redistribute and/or 18 * modify this file under the terms of the GNU General 19 * Public License, Version 3, as published by the Free Software 20 * Foundation. You should have received a copy of the GNU 21 * General Public License, Version 3 along with this program; 22 * if not, write to the Free Software Foundation, Inc., 51 23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 24 * 25 * 2. For the Magnolia Network Agreement (MNA), this file 26 * and the accompanying materials are made available under the 27 * terms of the MNA which accompanies this distribution, and 28 * is available at http://www.magnolia-cms.com/mna.html 29 * 30 * Any modifications to this file must keep this entire header 31 * intact. 32 * 33 */ 34 package info.magnolia.objectfactory; 35 36 /** 37 * ClassFactory implementations are responsible for locating and instantiating classes. Specific implementations 38 * could take care of container-specific hacks, provide support for a scripting language, etc. 39 * 40 * TODO ? an spi-like layer that would allow to have multiple implementations of this and delegate to the first which "accepts" the given parameters ? 41 * 42 * @author gjoseph 43 * @version $Revision: $ ($Author: $) 44 */ 45 public interface ClassFactory { 46 47 <C> Class<C> forName(String className) throws ClassNotFoundException; 48 49 /** 50 * Instantiates the given class with the given parameters. This attempts to find a matching constructor. 51 * For the empty constructor, pass no parameters (or an empty array, or null). 52 * Null arguments are not supported. 53 * 54 * @throws MgnlInstantiationException wrapping possible instantiation exceptions 55 */ 56 <T> T newInstance(Class<T> c, Object... params); 57 58 /** 59 * Instantiates the given class with the given parameters, using a constructor that matches the given 60 * <code>argTypes</code> exactly. 61 * 62 * To pass "null" to a single-arg constructor, use newInstance(c, new Object[]{null}) (otherwise the *array* itself will be considered null) 63 * 64 * @throws MgnlInstantiationException wrapping possible instantiation exceptions 65 */ 66 <T> T newInstance(Class<T> c, Class<?>[] argTypes, Object... params); 67 68 }