package org.apache.commons.contract.constraints;

 import org.apache.commons.contract.Context;

 import org.apache.commons.i18n.bundles.ErrorBundle;

 import org.apache.commons.i18n.bundles.TextBundle;

 public class BooleanConstraints implements Constraints {

         public final static String TRUE = Boolean.toString(true);

     public final static String FALSE = Boolean.toString(false);

     public Object cast(Object value, Context context) throws CastException {

         if ( value instanceof Boolean) {

             return value;

         } 

         try {

             return Boolean.valueOf(StringConstraints.UNCONSTRAINED.cast(value, null).toString());

         } catch ( CastException exception ) {

             throw new CastException(new ErrorBundle("uncastableBooleanValue", new Object[] { value }));

         }

     }

     public void validate(Object value, Context context) throws ValidationException {

     }

     public TextBundle verboseConstraints() {

         return new TextBundle("unconstrainedBoolean");

     }

 }