1 /* 2 * Copyright 2002-2004 The Apache Software Foundation 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package org.apache.commons.clazz; 17 18 import java.util.HashMap; 19 20 import org.apache.commons.clazz.common.GroupClazzLoader; 21 22 /** 23 * An implementation of <code>ClazzLoader</code> that functions as the top- 24 * level clazz loader for a model and caches all clazzes by name. 25 * 26 * @author <a href="mailto:dmitri@apache.org">Dmitri Plotnikov</a> 27 * @version $Id: ModelClazzLoader.java 155436 2005-02-26 13:17:48Z dirkv $ 28 */ 29 public class ModelClazzLoader extends GroupClazzLoader { 30 31 private String model; 32 private HashMap clazzMap = new HashMap(); 33 34 public ModelClazzLoader(String model) { 35 super(null); 36 this.model = model; 37 } 38 39 public String getModel() { 40 return model; 41 } 42 43 /** 44 * @see ClazzLoader#getClazzForName(String) 45 */ 46 public Clazz getClazzForName(String name) { 47 Clazz clazz = (Clazz) clazzMap.get(name); 48 if (clazz == null) { 49 clazz = super.getClazzForName(name); 50 if (clazz != null) { 51 clazzMap.put(name, clazz); 52 } 53 } 54 return clazz; 55 } 56 57 /** 58 * @see ClazzLoader#defineClazz(String, Class, Class) 59 */ 60 public Clazz defineClazz( 61 String name, 62 Class clazzType, 63 Class instanceClass) 64 { 65 Clazz clazz = super.defineClazz(name, clazzType, instanceClass); 66 if (clazz != null) { 67 clazzMap.put(name, clazz); 68 } 69 return clazz; 70 } 71 }