/*
    * Copyright 2008 the original author or authors.
    * 
    * 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.openehealth.ipf.platform.camel.core.closures;
  
  import groovy.lang.Closure;
  
  import org.openehealth.ipf.commons.core.modules.api.ValidationException;
  import org.openehealth.ipf.commons.core.modules.api.Validator;
  
  /**
   * A validator that delegates to a {@link Closure}.
   * 
   * @author Martin Krasser
   */
  public class DelegatingValidator extends ClosureAdapter implements Validator<Object, Object> {
  
      public DelegatingValidator(Closure closure) {
          super(closure);
      }
  
      @Override
      public void validate(Object message, Object profile) {
          Object result;
          result = validateInternal(message, profile);
          if (!(result instanceof Boolean)) {
              return;
          }
          if (!(Boolean)result) {
              throw new ValidationException("validation closure returned false");
          }
      }
      
      private Object validateInternal(Object message, Object profile) {
          if (getClosure().getParameterTypes().length == 2) {
              return call(message, profile);
          } else {
              return call(message);
          }
      }
      
  }