org.springframework.beans.propertyeditors.ClassEditor.java Source code

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Here is the source code for org.springframework.beans.propertyeditors.ClassEditor.java

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/*
 * 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 "";
        }
    }

}