001/* 002 * Copyright 2002-2012 the original author or authors. 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 * https://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 017package org.springframework.beans.propertyeditors; 018 019import java.beans.PropertyEditorSupport; 020 021import org.springframework.util.ClassUtils; 022import org.springframework.util.ObjectUtils; 023import org.springframework.util.StringUtils; 024 025/** 026 * Property editor for an array of {@link Class Classes}, to enable 027 * the direct population of a {@code Class[]} property without having to 028 * use a {@code String} class name property as bridge. 029 * 030 * <p>Also supports "java.lang.String[]"-style array class names, in contrast 031 * to the standard {@link Class#forName(String)} method. 032 * 033 * @author Rob Harrop 034 * @author Juergen Hoeller 035 * @since 2.0 036 */ 037public class ClassArrayEditor extends PropertyEditorSupport { 038 039 private final ClassLoader classLoader; 040 041 042 /** 043 * Create a default {@code ClassEditor}, using the thread 044 * context {@code ClassLoader}. 045 */ 046 public ClassArrayEditor() { 047 this(null); 048 } 049 050 /** 051 * Create a default {@code ClassArrayEditor}, using the given 052 * {@code ClassLoader}. 053 * @param classLoader the {@code ClassLoader} to use 054 * (or pass {@code null} for the thread context {@code ClassLoader}) 055 */ 056 public ClassArrayEditor(ClassLoader classLoader) { 057 this.classLoader = (classLoader != null ? classLoader : ClassUtils.getDefaultClassLoader()); 058 } 059 060 061 @Override 062 public void setAsText(String text) throws IllegalArgumentException { 063 if (StringUtils.hasText(text)) { 064 String[] classNames = StringUtils.commaDelimitedListToStringArray(text); 065 Class<?>[] classes = new Class<?>[classNames.length]; 066 for (int i = 0; i < classNames.length; i++) { 067 String className = classNames[i].trim(); 068 classes[i] = ClassUtils.resolveClassName(className, this.classLoader); 069 } 070 setValue(classes); 071 } 072 else { 073 setValue(null); 074 } 075 } 076 077 @Override 078 public String getAsText() { 079 Class<?>[] classes = (Class[]) getValue(); 080 if (ObjectUtils.isEmpty(classes)) { 081 return ""; 082 } 083 StringBuilder sb = new StringBuilder(); 084 for (int i = 0; i < classes.length; ++i) { 085 if (i > 0) { 086 sb.append(","); 087 } 088 sb.append(ClassUtils.getQualifiedName(classes[i])); 089 } 090 return sb.toString(); 091 } 092 093}