com.nway.spring.classwork.DynamicBeanClassLoader.java Source code

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Here is the source code for com.nway.spring.classwork.DynamicBeanClassLoader.java

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/*
 * 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 com.nway.spring.classwork;

import java.io.File;
import java.io.IOException;

import org.springframework.util.FileCopyUtils;

/**
 * 
 * 
 * @author zdtjss@163.com
 * 
 * @since 2014-1-13
 */
public class DynamicBeanClassLoader extends ClassLoader {

    private String fileName;

    /**
     * 
     * @param classLoader  ClassLoader
     */
    public DynamicBeanClassLoader(ClassLoader classLoader) {

        super(classLoader);
    }

    /**
     * 
     * 
     * @param classLoader  ClassLoader
     * @param fileName    class (  )
     */
    public DynamicBeanClassLoader(ClassLoader classLoader, String fileName) {

        super(classLoader);
        this.fileName = fileName;
    }

    /**
     *  byte  Class 
     * <p>
     * 
     * @param name
     * @param classContent
     * @return Class ,null
     */
    public Class<?> defineClass(String name, byte[] classContent) throws IOException {

        if (fileName != null) {
            write(classContent, fileName + ".class");
        }

        Class<?> classz = super.defineClass(name, classContent, 0, classContent.length);

        resolveClass(classz);

        return classz;
    }

    private void write(byte[] b, String filePath) throws IOException {

        File file = new File(filePath);
        File parentFile = file.getParentFile();

        if (!parentFile.exists()) {

            boolean isScuess = parentFile.mkdirs();

            if (!isScuess) {
                throw new IOException(" " + parentFile.getAbsolutePath());
            }

        }

        FileCopyUtils.copy(b, file);
    }
}