001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.commons.betwixt.expression; 018 019 020 /** <p><code>ClassNameExpression</code> returns the current class name 021 * of the context bean 022 * 023 * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> 024 * @since 0.5 025 */ 026 public class ClassNameExpression implements Expression { 027 028 /** Base constructor */ 029 public ClassNameExpression() { 030 } 031 032 /** 033 * Evaluate on the current context and return the class name 034 * 035 * @param context the context against which this expression will be evaluated 036 * @return the name of the class of the current contex bean 037 */ 038 public Object evaluate(Context context) { 039 Object bean = context.getBean(); 040 if ( bean != null ) { 041 return bean.getClass().getName(); 042 } 043 return null; 044 } 045 046 /** 047 * Do nothing. 048 * @see org.apache.commons.betwixt.expression.Expression 049 */ 050 public void update(Context context, String newValue) { 051 // do nothing 052 } 053 054 /** 055 * Returns something useful for logging. 056 * @return something useful for logging 057 */ 058 public String toString() { 059 return "ClassNameExpression"; 060 } 061 }