DefaultValidatorProvider.java

/*
 * Copyright 2011 <a href="mailto:lincolnbaxter@gmail.com">Lincoln Baxter, III</a>
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.ocpsoft.rewrite.instance;

import org.ocpsoft.rewrite.param.Validator;
import org.ocpsoft.rewrite.spi.ValidatorProvider;
import org.ocpsoft.rewrite.util.Instances;

/**
 * Default implementation of {@link ValidatorProvider} which allows to use Rewrite {@link Validator} implementations by
 * their type.
 * 
 * @author Christian Kaltepoth
 */
public class DefaultValidatorProvider implements ValidatorProvider
{

   @Override
   public Validator<?> getByValidatorType(Class<?> validatorType)
   {
      if (Validator.class.isAssignableFrom(validatorType)) {

         return (Validator<?>) Instances.lookup(validatorType);

      }

      return null;

   }

   @Override
   public Validator<?> getByTargetType(Class<?> targetType)
   {
      // unsupported
      return null;
   }

   @Override
   public Validator<?> getByValidatorId(String id)
   {
      // unsupported
      return null;
   }

   @Override
   public int priority()
   {
      return 0;
   }

}