1// 2// ======================================================================== 3// Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. 4// ------------------------------------------------------------------------ 5// All rights reserved. This program and the accompanying materials 6// are made available under the terms of the Eclipse Public License v1.0 7// and Apache License v2.0 which accompanies this distribution. 8// 9// The Eclipse Public License is available at 10// http://www.eclipse.org/legal/epl-v10.html 11// 12// The Apache License v2.0 is available at 13// http://www.opensource.org/licenses/apache2.0.php 14// 15// You may elect to redistribute this code under either of these licenses. 16// ======================================================================== 17// 18 19package org.eclipse.jetty.webapp; 20 21import org.eclipse.jetty.util.Loader; 22import org.eclipse.jetty.util.log.Log; 23import org.eclipse.jetty.util.log.Logger; 24import org.eclipse.jetty.util.resource.Resource; 25 26/** 27 * DiscoveredAnnotation 28 * 29 * Represents an annotation that has been discovered 30 * by scanning source code of WEB-INF/classes and WEB-INF/lib jars. 31 * 32 */ 33public abstract class DiscoveredAnnotation 34{ 35 private static final Logger LOG = Log.getLogger(DiscoveredAnnotation.class); 36 37 protected WebAppContext _context; 38 protected String _className; 39 protected Class<?> _clazz; 40 protected Resource _resource; //resource it was discovered on, can be null (eg from WEB-INF/classes) 41 42 public abstract void apply(); 43 44 public DiscoveredAnnotation (WebAppContext context, String className) 45 { 46 this(context,className, null); 47 } 48 49 50 public DiscoveredAnnotation(WebAppContext context, String className, Resource resource) 51 { 52 _context = context; 53 _className = className; 54 _resource = resource; 55 } 56 57 public Resource getResource () 58 { 59 return _resource; 60 } 61 62 public Class<?> getTargetClass() 63 { 64 if (_clazz != null) 65 return _clazz; 66 67 loadClass(); 68 69 return _clazz; 70 } 71 72 private void loadClass () 73 { 74 if (_clazz != null) 75 return; 76 77 if (_className == null) 78 return; 79 80 try 81 { 82 _clazz = Loader.loadClass(null, _className); 83 } 84 catch (Exception e) 85 { 86 LOG.warn(e); 87 } 88 } 89} 90