/*
    * License : The MIT License
    * Copyright(c) 2020 Olyutorskii
    */
   
   package io.github.olyutorskii.ghmvnlibtmpl;
   
   import java.io.IOException;
   import java.io.InputStream;
  import java.util.Properties;
  
  class Resource {
  
      static final String RES_PROP =
              "resources/test.properties";
              //"resources/ZZZZ.properties";
  
      static final Class<?> THISCLASS = Resource.class;
      static final Resource SINGLETON;
  
      Properties props;
  
  
      static {
          try {
              SINGLETON = new Resource();
          } catch (IOException ex) {
              throw new ExceptionInInitializerError(ex);
          }
  
          assert SINGLETON.checkProp();
          assert THISCLASS.equals(SINGLETON.getClass());
      }
  
  
      /**
       *
       * @throws java.io.IOException
       */
      private Resource() throws IOException {
          super();
  
          InputStream is;
          is = this.getClass().getResourceAsStream(RES_PROP);
          assert is != null;
  
          this.props = new Properties();
          props.load(is);
  
          return;
      }
  
      private boolean checkProp(){
          String val;
  
          val = this.props.getProperty("key");
          assert "value".equals(val);
          // assert "XXX".equals(val);
  
          val = this.props.getProperty("han");
          assert "漢".equals(val);
  
          return true;
      }
  
      static Resource getResource(){
          return SINGLETON;
      }
  
  }