Spring Framework example source code file (ClassArrayEditor.java)

This example Spring Framework source code file (ClassArrayEditor.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Spring Framework tags/keywords

bean, class, class, classarrayeditor, classarrayeditor, classloader, illegalargumentexception, javabean, propertyeditorsupport, string, string, stringbuffer, stringbuffer

The Spring Framework ClassArrayEditor.java source code

/*
 * Copyright 2002-2006 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
 *
 *      http://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 org.springframework.util.ClassUtils;
import org.springframework.util.StringUtils;

/**
 * Property editor for an array of {@link java.lang.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
 * @since 2.0
 */
public class ClassArrayEditor extends PropertyEditorSupport {

	private final ClassLoader classLoader;


	/**
	 * Create a default <code>ClassEditor, using the thread
	 * context <code>ClassLoader.
	 */
	public ClassArrayEditor() {
		this(null);
	}

	/**
	 * 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 ClassLoader)
	 */
	public ClassArrayEditor(ClassLoader classLoader) {
		this.classLoader = classLoader != null
				? classLoader : ClassUtils.getDefaultClassLoader();
	}


	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);
		}
	}

	public String getAsText() {
		Class[] classes = (Class[]) getValue();
		if (classes == null || classes.length == 0) {
			return "";
		}
		return toCommaDelimitedString(classes);
	}


	private static String toCommaDelimitedString(Class[] classes) {
		StringBuffer buffer = new StringBuffer();
		for (int i = 0; i < classes.length; ++i) {
			if (i > 0) {
				buffer.append(",");
			}
			buffer.append(ClassUtils.getQualifiedName(classes[i]));
		}
		return buffer.toString();
	}

}