package net.sf.twip.parameterhandler;
   
   import net.sf.twip.internal.TwipConfigurationErrorInvalidEnumAssume;
   import net.sf.twip.util.Parameter;
   
   /**
    * Enums can be compared by their ordinal.
    */
   public class EnumParameterHandler extends AbstractNumberParameterHandler {
  	public EnumParameterHandler(Parameter parameter) {
  		super(parameter);
  	}
  
  	@Override
  	protected Comparable<? extends Number> getComparable(String value) {
  		final Object[] values = getDefaultParameterValues();
  		for (int i = 0; i < values.length; i++) {
  			if (value.equals(values[i].toString())) {
  				return i;
  			}
  		}
  		throw new TwipConfigurationErrorInvalidEnumAssume("invalid enum value " + value
  				+ " in Assume expression");
  	}
  
  	@Override
  	protected Object[] getDefaultParameterValues() {
  		return parameter.getType().getEnumConstants();
  	}
  
  	@Override
  	public boolean test(Object value) {
  		final Object[] values = getDefaultParameterValues();
  		for (int i = 0; i < values.length; i++) {
  			if (value.equals(values[i])) {
  				return super.test(i);
  			}
  		}
  		throw new TwipConfigurationErrorInvalidEnumAssume("invalid enum value " + value
  				+ " in Assume expression!!!");
  	}
  }