/**
    * 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.creadur.tentacles;
  
  import java.io.File;
  import java.io.IOException;
  import java.io.InputStreamReader;
  import java.io.Reader;
  import java.net.URL;
  
  public class TentaclesResources {
  
      private final IOSystem ioSystem;
  
      public TentaclesResources(final IOSystem ioSystem) {
          super();
          this.ioSystem = ioSystem;
      }
  
      public Reader read(final String resourceName) throws IOException {
          final URL resourceUrl = toUrl(resourceName);
          final InputStreamReader templateReader =
                  new InputStreamReader(resourceUrl.openStream());
          return templateReader;
      }
  
      public String readText(final String resourcePath) throws IOException {
          final String text = this.ioSystem.slurp(toUrl(resourcePath));
          return text;
      }
  
      public void copyTo(final String resourcePath, final File to)
              throws IOException {
          this.ioSystem.copy(toUrl(resourcePath).openStream(), to);
      }
  
      private URL toUrl(final String resourcePath) {
          final URL resourceUrl =
                  this.getClass().getClassLoader().getResource(resourcePath);
          if (resourceUrl == null) {
              throw new IllegalStateException(
                      "Tentacles expects the classpath to contain "
                              + resourcePath);
          }
          return resourceUrl;
      }
  }