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 Unconstrained implements Constraints {

     public final static Unconstrained UNCONSTRAINED = new Unconstrained();

     private Class clazz;

     public Unconstrained() {

         this.clazz = null;

     }

     public Unconstrained(Class clazz) {

         this.clazz = clazz;

     }

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

         return value;

     }

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

         if ( clazz != null && !clazz.isInstance(value) ) {

             throw new ValidationException(new ErrorBundle("invalidObjectType", new Object[] { clazz, value }));

         }

     }

     public TextBundle verboseConstraints() {

         if ( clazz == null ) {

             return new TextBundle("unconstrained");

         } else {

             return new TextBundle("constrainedUnconstrained");

         }

     }

 }