/*
 * 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 java.io.File;

import org.springframework.core.io.DescriptiveResource;
import org.springframework.core.io.FileSystemResource;
import org.springframework.core.io.Resource;
import org.springframework.core.io.ResourceLoader;

/**
 * Load a resource from resource paths.
 */
public class ResourcePathResourceLoader implements ResourceLoader {
  private final String[] resourcePaths;

  /**
   * @param resourcePaths
   *          Resource paths to search in.
   */
  public ResourcePathResourceLoader(String[] resourcePaths) {
    this.resourcePaths = resourcePaths;
  }

  @Override
  public Resource getResource(String location) {
    if (resourcePaths != null) {
      for (String parent : resourcePaths) {
        final File f = new File(parent, location);
        if (f.exists()) {
          return new FileSystemResource(f);
        }
      }
    }

    return new DescriptiveResource(location + " was not found in resource paths");
  }

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