content: /*
   * Copyright (c) 2019 abc123lzf <abc123lzf@126.com>
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in all
   * copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
   */
  package com.lzf.flyingsocks.url;
  
  
  import java.net.URL;
  import java.net.URLStreamHandler;
  import java.net.URLStreamHandlerFactory;
  
  /**
   * 用于处理classpath开头的URL，这个URL会从加载这个类的类加载器的目录下搜索资源并返回其InputStream
   * URL格式为: classpath://folder/file/...
   */
  public final class ClasspathURLHandlerFactory implements URLStreamHandlerFactory {
  
      private static final String PROTOCOL = "classpath";
  
      static {
          ClassLoader cl = ClasspathURLHandlerFactory.class.getClassLoader();
          URL.setURLStreamHandlerFactory(new ClasspathURLHandlerFactory(cl));
      }
  
      private final ClassLoader classLoader;
  
      private ClasspathURLHandlerFactory(ClassLoader classLoader) {
          this.classLoader = classLoader;
      }
  
      @Override
      public URLStreamHandler createURLStreamHandler(String protocol) {
          if (protocol.toLowerCase().equals(PROTOCOL)) {
              return new ClasspathURLHandler(classLoader);
          } else {
              return null;
          }
      }
  }
  