001 /*
002 * Copyright 2002-2004 The Apache Software Foundation
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016 package org.apache.commons.clazz.bean;
017
018 import org.apache.commons.clazz.Clazz;
019 import org.apache.commons.clazz.ClazzInstanceFactory;
020 import org.apache.commons.clazz.ClazzLoader;
021 import org.apache.commons.clazz.common.ClazzFeatureSupport;
022
023 /**
024 *
025 * @author <a href="mailto:dmitri@apache.org">Dmitri Plotnikov</a>
026 * @version $Id: BeanClazzInstanceFactory.java 155436 2005-02-26 13:17:48Z dirkv $
027 */
028 public abstract class BeanClazzInstanceFactory
029 extends ClazzFeatureSupport
030 implements ClazzInstanceFactory
031 {
032 private String name;
033 private static final String[] EMPTY_STRING_ARRAY = new String[0];
034 private String[] parameterClazzNames;
035 private Clazz[] parameterClazzes;
036 private String signature;
037
038 public BeanClazzInstanceFactory(
039 Clazz declaringClazz,
040 String parameterClazzNames[])
041 {
042 this(declaringClazz, null, parameterClazzNames);
043 }
044
045 /**
046 * Constructor for BeanClazzInstanceFactory.
047 * @param declaringClazz
048 */
049 public BeanClazzInstanceFactory(
050 Clazz declaringClazz,
051 String name,
052 String parameterClazzNames[])
053 {
054 super(declaringClazz);
055 this.name = name;
056 this.parameterClazzNames = parameterClazzNames;
057 this.parameterClazzNames =
058 (parameterClazzNames != null
059 ? parameterClazzNames
060 : EMPTY_STRING_ARRAY);
061 }
062
063 /**
064 * @see org.apache.commons.clazz.ClazzInstanceFactory#getName()
065 */
066 public String getName() {
067 return name;
068 }
069
070 /**
071 * @see org.apache.commons.clazz.ClazzInstanceFactory#getParameterClazzes()
072 */
073 public Clazz[] getParameterClazzes() {
074 if (parameterClazzes == null) {
075 parameterClazzes = new Clazz[parameterClazzNames.length];
076 ClazzLoader loader = getDeclaringClazz().getClazzLoader();
077 for (int i = 0; i < parameterClazzes.length; i++) {
078 parameterClazzes[i] =
079 loader.getClazzForName(parameterClazzNames[i]);
080 if (parameterClazzes[i] == null) {
081 throw new BeanClazzConfigurationException(
082 "Invalid argument type: "
083 + parameterClazzNames[i]
084 + ". Clazz not found.");
085 }
086 }
087 }
088
089 return parameterClazzes;
090 }
091
092 /**
093 * @see org.apache.commons.clazz.ClazzInstanceFactory#getSignature()
094 */
095 public String getSignature() {
096 if (signature == null) {
097 signature = Clazz.constructSignature(name, getParameterClazzes());
098 }
099 return signature;
100 }
101 }