code: /*
   * Copyright © 2014-2017 EntIT Software LLC, a Micro Focus company (L.P.)
   *
   * Licensed 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 io.cloudslang.runtime.impl.python.external;
  
  import java.io.IOException;
  import java.io.InputStream;
  
  import static java.nio.charset.StandardCharsets.UTF_8;
  import static java.util.Objects.requireNonNull;
  import static org.apache.commons.io.IOUtils.readLines;
  import static org.apache.commons.io.IOUtils.toByteArray;
  import static org.apache.commons.lang3.StringUtils.join;
  
  
  public class ResourceScriptResolver {
  
      private static final byte[] execScriptAsBytes;
      private static final String evalScriptAsString;
  
      static {
          execScriptAsBytes = loadScriptFromResource("main.py");
          evalScriptAsString = loadScriptFromResourceAsString("eval.py");
      }
  
      private static byte[] loadScriptFromResource(String resourceName) {
          try (InputStream stream = requireNonNull(ResourceScriptResolver.class.getClassLoader(),
                  "Could not get not-null classloader")
                  .getResourceAsStream(resourceName)) {
              return toByteArray(requireNonNull(stream, "Could not locate resource '" + resourceName + "'"));
          } catch (IOException ioEx) {
              throw new RuntimeException("Could not load resource '" + resourceName + "': ", ioEx);
          }
      }
  
      private static String loadScriptFromResourceAsString(String resourceName) {
          try (InputStream stream = requireNonNull(ResourceScriptResolver.class.getClassLoader(),
                  "Could not get not-null classloader")
                  .getResourceAsStream(resourceName)) {
              InputStream safeStream = requireNonNull(stream, "Could not locate resource '" + resourceName + "'");
              // Must make sure that the eval.py does not have " character in its source.
              return join(readLines(safeStream, UTF_8), "\n");
          } catch (IOException ioEx) {
              throw new RuntimeException("Could not load resource '" + resourceName + "': ", ioEx);
          }
      }
  
      public static byte[] loadExecScriptAsBytes() {
          return execScriptAsBytes;
      }
  
      public static String loadEvalScriptAsString() {
          return evalScriptAsString;
      }
  
  }
  