trunk/ruta-core/src/main/java/org/apache/uima/ruta/resource/RutaResourceLoader.java

/*
 * 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.uima.ruta.resource;

import org.springframework.core.io.DefaultResourceLoader;
import org.springframework.core.io.Resource;
import org.springframework.core.io.ResourceLoader;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;

/**
 * Resource loader for ruta.
 *
 * This resource loader first looks in the resource paths and fallback in the classpath if it is not found.
 */
public class RutaResourceLoader implements ResourceLoader {
  private final ResourceLoader wrapped;
  private final ResourceLoader fallback;

  /**
   * @param resourcePaths Resource paths to search in priority.
   */
  public RutaResourceLoader(String[] resourcePaths) {
    this.wrapped = new PathMatchingResourcePatternResolver(new ResourcePathResourceLoader(resourcePaths));
    this.fallback = new DefaultResourceLoader();
  }

  public Resource getResource(String location) {
    Resource resource = this.wrapped.getResource(location);
    if (!resource.exists()) {
      resource = fallback.getResource(location);
    }
    return resource;
  }

  public ClassLoader getClassLoader() {
     return getClass().getClassLoader();
  }
}