/*
 * Copyright 2002-2017 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.beans.propertyeditors;

import java.beans.PropertyEditorSupport;
import java.util.StringJoiner;

import org.springframework.lang.Nullable;
import org.springframework.util.ClassUtils;
import org.springframework.util.ObjectUtils;
import org.springframework.util.StringUtils;

Property editor for an array of Classes, to enable the direct population of a Class[] property without having to use a String class name property as bridge.

Also supports "java.lang.String[]"-style array class names, in contrast to the standard Class.forName(String) method.

Author:Rob Harrop, Juergen Hoeller
Since:2.0
/** * Property editor for an array of {@link Class Classes}, to enable * the direct population of a {@code Class[]} property without having to * use a {@code String} class name property as bridge. * * <p>Also supports "java.lang.String[]"-style array class names, in contrast * to the standard {@link Class#forName(String)} method. * * @author Rob Harrop * @author Juergen Hoeller * @since 2.0 */
public class ClassArrayEditor extends PropertyEditorSupport { @Nullable private final ClassLoader classLoader;
Create a default ClassEditor, using the thread context ClassLoader.
/** * Create a default {@code ClassEditor}, using the thread * context {@code ClassLoader}. */
public ClassArrayEditor() { this(null); }
Create a default ClassArrayEditor, using the given ClassLoader.
Params:
  • classLoader – the ClassLoader to use (or pass null for the thread context ClassLoader)
/** * Create a default {@code ClassArrayEditor}, using the given * {@code ClassLoader}. * @param classLoader the {@code ClassLoader} to use * (or pass {@code null} for the thread context {@code ClassLoader}) */
public ClassArrayEditor(@Nullable ClassLoader classLoader) { this.classLoader = (classLoader != null ? classLoader : ClassUtils.getDefaultClassLoader()); } @Override public void setAsText(String text) throws IllegalArgumentException { if (StringUtils.hasText(text)) { String[] classNames = StringUtils.commaDelimitedListToStringArray(text); Class<?>[] classes = new Class<?>[classNames.length]; for (int i = 0; i < classNames.length; i++) { String className = classNames[i].trim(); classes[i] = ClassUtils.resolveClassName(className, this.classLoader); } setValue(classes); } else { setValue(null); } } @Override public String getAsText() { Class<?>[] classes = (Class[]) getValue(); if (ObjectUtils.isEmpty(classes)) { return ""; } StringJoiner sj = new StringJoiner(","); for (Class<?> klass : classes) { sj.add(ClassUtils.getQualifiedName(klass)); } return sj.toString(); } }