content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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 org.apache.camel.component.velocity;
  
  import java.io.InputStream;
  import java.io.InputStreamReader;
  import java.io.Reader;
  
  import org.apache.camel.spi.ClassResolver;
  import org.apache.camel.util.ObjectHelper;
  import org.apache.velocity.exception.ResourceNotFoundException;
  import org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader;
  import org.apache.velocity.util.ExtProperties;
  
  /**
   * Camel specific {@link ClasspathResourceLoader} that loads resources using the Camel {@link ClassResolver} used by the
   * Velocity.
   */
  public class CamelVelocityClasspathResourceLoader extends ClasspathResourceLoader {
  
      private ClassResolver resolver;
  
      @Override
      public void init(ExtProperties configuration) {
          super.init(configuration);
          resolver = (ClassResolver) this.rsvc.getProperty("CamelClassResolver");
          ObjectHelper.notNull(resolver, "ClassResolver");
      }
  
      @Override
      public Reader getResourceReader(String name, String encoding) throws ResourceNotFoundException {
          InputStream is = resolver.loadResourceAsStream(name);
          if (is == null) {
              return super.getResourceReader(name, encoding);
          } else {
              return new InputStreamReader(is);
          }
      }
  
  }
  