//-------------------------------------------------------------------------- // Copyright (c) 1998-2004, Drew Davidson and Luke Blanshard // All rights reserved. // // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // Redistributions of source code must retain the above copyright notice, // this list of conditions and the following disclaimer. // Redistributions in binary form must reproduce the above copyright // notice, this list of conditions and the following disclaimer in the // documentation and/or other materials provided with the distribution. // Neither the name of the Drew Davidson nor the names of its contributors // may be used to endorse or promote products derived from this software // without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS // FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE // COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, // BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS // OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED // AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF // THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH // DAMAGE. //-------------------------------------------------------------------------- package ariba.util.expr; import java.util.HashMap; import java.util.Map; import ariba.util.core.SecurityHelper; /** * Default class resolution. Uses Class.forName() to look up classes by name. * It also looks in the "java.lang" package if the class named does not give * a package specifier, allowing easier usage of these classes. * @author Luke Blanshard (blanshlu@netscape.net) * @author Drew Davidson (drew@ognl.org) */ public class DefaultClassResolver extends Object implements ClassResolver { private Map classes = new HashMap(101); public DefaultClassResolver() { super(); } public Class classForName(String className, Map context) throws ClassNotFoundException { Class result = null; if ((result = (Class)classes.get(className)) == null) { if (!SecurityHelper.isScriptableClass(className)) { throw new ClassNotFoundException(); } try { result = Class.forName(className); } catch (ClassNotFoundException ex) { if (className.indexOf('.') == -1) { String javaClassName = "java.lang."+className; if (!SecurityHelper.isScriptableClass(javaClassName)) { throw new ClassNotFoundException(); } result = Class.forName(javaClassName); classes.put(javaClassName, result); } } classes.put(className, result); } return result; } }