001/* 002 * (C) Copyright 2006-2008 Nuxeo SAS (http://nuxeo.com/) and contributors. 003 * 004 * All rights reserved. This program and the accompanying materials 005 * are made available under the terms of the GNU Lesser General Public License 006 * (LGPL) version 2.1 which accompanies this distribution, and is available at 007 * http://www.gnu.org/licenses/lgpl.html 008 * 009 * This library is distributed in the hope that it will be useful, 010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 012 * Lesser General Public License for more details. 013 * 014 * Contributors: 015 * bstefanescu 016 * 017 * $Id$ 018 */ 019 020package org.nuxeo.ecm.webengine.loader; 021 022import org.nuxeo.ecm.webengine.WebException; 023 024/** 025 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a> 026 */ 027public class LazyClassProxy implements ClassProxy { 028 029 protected final String className; 030 031 protected final ClassLoader loader; 032 033 protected Class<?> clazz; 034 035 public LazyClassProxy(ClassLoader loader, String className) { 036 this.loader = loader; 037 this.className = className; 038 } 039 040 public String getClassName() { 041 return className; 042 } 043 044 public ClassLoader getLoader() { 045 return loader; 046 } 047 048 public Class<?> get() { 049 if (clazz == null) { 050 try { 051 clazz = loader.loadClass(className); 052 } catch (ReflectiveOperationException e) { 053 throw WebException.wrap("Failed to load class " + className, e); 054 } 055 } 056 return clazz; 057 } 058 059 public void reset() { 060 clazz = null; 061 } 062 063 @Override 064 public String toString() { 065 return className; 066 } 067 068}