package cz.cuni.amis.utils.configuration.providers;
   
   import cz.cuni.amis.utils.configuration.PropertyProvider;
   import java.io.IOException;
   import java.io.InputStream;
   import java.util.Properties;
   
   /**
    * Wrapper of java.util.Properties class.
   * @author ik
   */
  public abstract class AbstractPropertiesProvider extends PropertyProvider {
  
      Properties props = new Properties();
      String sourceDescription;
  
      /**
       * @param sourceDescription human readable decription of resource from which the properties were read
       * @param is Reader from which the Properties can be loaded.
       */
      public AbstractPropertiesProvider(InputStream is, String sourceDescription) {
          try {
              props.load(is);
              this.sourceDescription = sourceDescription;
          } catch (Exception ex) {
               throw new RuntimeException("Properties cannot be read from '" + sourceDescription +"'.", ex);
          }
      }
  
      @Override
      public String getProperty(String key) {
          return props.getProperty(key);
      }
  
      @Override
      public String toString() {
          return "Properties from " + sourceDescription;
      }
  }