PropertyTranslator

[Steve Gibson <St...@cowww.com>]

Hi,

I have implemented a rudimentary translator that can load in a
properties file and I want to a) share it and b) get some tips on
getting the Location right for errors.

Feel free to critique my code. I am sure I could learn a thing or two
about robustness.

package sandbox;

import java.io.FileInputStream;
import java.io.IOException;
import java.util.Properties;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.apache.hivemind.internal.ApplicationRuntimeException;
import org.apache.hivemind.internal.Module;
import org.apache.hivemind.schema.Translator;

public class PropertyTranslator implements Translator
{

   private static final Log log =
LogFactory.getLog(PropertyTranslator.class);

   public PropertyTranslator()
   {
   }

   /*
    * Placeholder - options can be passed as a comma-separated list
   public PropertyTranslator(String options)
   {
   }
   */

   public Object translate(Module contributingModule, Class
propertyType,
         String inputValue)
   {
      Properties props = new Properties();
      String location = contributingModule.expandSymbols(inputValue,
contributingModule.getLocation()); // <-- is this cheating?

      try
      {
         props.load(new FileInputStream(location));
      }
      catch (IOException ioe)
      {
         log.error("Could not load properties file at: " + location,
ioe);
         throw new ApplicationRuntimeException("Could not load
properties file at: "
               + location, ioe);

      }
	
	// Specific to my prototype code - I wanted to be able to report
which configuration files are loaded
      props.setProperty("PROPERTIES.NAME",
inputValue.substring(location.lastIndexOf("/") + 1));
      return props;
   }
}

Thanks,

Steve Gibson
Software Engineer
COWWW Software

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