infra.beans.propertyeditors.ClassArrayEditor Maven / Gradle / Ivy
/*
* Copyright 2017 - 2024 the original author or authors.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see [https://www.gnu.org/licenses/]
*/
package infra.beans.propertyeditors;
import java.beans.PropertyEditorSupport;
import java.util.StringJoiner;
import infra.lang.Nullable;
import infra.util.ClassUtils;
import infra.util.ObjectUtils;
import infra.util.StringUtils;
/**
* 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.
*
* 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 4.0
*/
public class ClassArrayEditor extends PropertyEditorSupport {
@Nullable
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 {@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();
}
}