spring ClassEditor 源码
spring ClassEditor 代码
文件路径：/spring-beans/src/main/java/org/springframework/beans/propertyeditors/ClassEditor.java
/*
* 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 org.springframework.lang.Nullable;
import org.springframework.util.ClassUtils;
import org.springframework.util.StringUtils;
/**
* Property editor for {@link Class java.lang.Class}, to enable the direct
* population of a {@code Class} property without recourse to having to use a
* 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 Juergen Hoeller
* @author Rick Evans
* @since 13.05.2003
* @see Class#forName
* @see org.springframework.util.ClassUtils#forName(String, ClassLoader)
*/
public class ClassEditor extends PropertyEditorSupport {
@Nullable
private final ClassLoader classLoader;
/**
* Create a default ClassEditor, using the thread context ClassLoader.
*/
public ClassEditor() {
this(null);
}
/**
* Create a default ClassEditor, using the given ClassLoader.
* @param classLoader the ClassLoader to use
* (or {@code null} for the thread context ClassLoader)
*/
public ClassEditor(@Nullable ClassLoader classLoader) {
this.classLoader = (classLoader != null ? classLoader : ClassUtils.getDefaultClassLoader());
}
@Override
public void setAsText(String text) throws IllegalArgumentException {
if (StringUtils.hasText(text)) {
setValue(ClassUtils.resolveClassName(text.trim(), this.classLoader));
}
else {
setValue(null);
}
}
@Override
public String getAsText() {
Class<?> clazz = (Class<?>) getValue();
if (clazz != null) {
return ClassUtils.getQualifiedName(clazz);
}
else {
return "";
}
}
}
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