package net.obsearch.index.utils;
   
   import java.util.HashSet;
   import java.util.Set;
   
   import org.opt4j.benchmark.DoubleCopyDecoder;
   import org.opt4j.benchmark.DoubleString;
   import org.opt4j.core.problem.Creator;
   import org.opt4j.core.problem.Decoder;
  import org.opt4j.core.problem.Evaluator;
  import org.opt4j.core.problem.ProblemModule;
  
  import com.google.inject.Inject;
  /**
   * Optimizing module for finding optimal config parameters.
   * 
   *
   */
  public class OBOptimizerModule extends ProblemModule {
  	private static Creator<DoubleString> creator;
  	private static Evaluator<DoubleString> eval;
  	private static Class<? extends Decoder<DoubleString, DoubleString>> decoder;
  	
  	public OBOptimizerModule(){
  		
  	}
  	/**
  	 * Creates an OB optimizer module with a double creator and an instance
  	 * for evaluator (it doesn't make sense to create anything since the evaluator will
  	 * be called on top of the Index).
  	 * @param creator double creator
  	 * @param eval evaluator
  	 */
  	
  	public OBOptimizerModule(Creator<DoubleString> creator, Evaluator<DoubleString> eval){
  		this.creator = creator;
  		this.eval = eval;
  		decoder = DoubleCopyDecoder.class;
  	}
  
  	@Override
  	protected void configure() {
  		
  		Set<Class<?>> classes = new HashSet<Class<?>>() {
  			{				
  				add(decoder);
  			}
  		};
  
  		for (Class<?> clazz : classes) {
  			bind(clazz).in(SINGLETON);
  		}
  
  		bind(Creator.class).toInstance(creator);
  		bind(Decoder.class).to(decoder);
  		bind(Evaluator.class).toInstance(eval);
  
  	}
  	@Override
  	protected void config() {
  		configure();
  		
  	}
  
  }