/*
    * 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.model;
  
  import static org.apache.camel.builder.Builder.bodyAs;
  import groovy.lang.Closure;
  
  import javax.xml.bind.annotation.*;
  import javax.xml.transform.stream.StreamSource;
  
  import groovy.transform.stc.ClosureParams;
  import groovy.transform.stc.SimpleType;
  import org.apache.camel.Expression;
  import org.apache.camel.spi.Metadata;
  import org.apache.camel.spi.RouteContext;
  import org.openehealth.ipf.commons.core.modules.api.Validator;
  import org.openehealth.ipf.commons.xml.SchematronValidator;
  import org.openehealth.ipf.commons.xml.XsdValidator;
  import org.openehealth.ipf.platform.camel.core.adapter.ProcessorAdapter;
  import org.openehealth.ipf.platform.camel.core.adapter.ValidatorAdapter;
  import org.openehealth.ipf.platform.camel.core.closures.DelegatingExpression;
  
  /**
   * @author Martin Krasser
   * @author Christian Ohr
   */
  @Metadata(label = "ipf,eip,transformation")
  @XmlRootElement(name = "verify")
  @XmlAccessorType(XmlAccessType.FIELD)
  public class ValidatorAdapterDefinition extends ProcessorAdapterDefinition {
  
      @XmlTransient
      private Validator validator;
      @XmlAttribute
      private String validatorBean;
      @XmlTransient
      private Object profile;
      @XmlTransient
      private Expression profileExpression;
      
      public ValidatorAdapterDefinition() {
          this(new AlwaysValid());
      }
      
      public ValidatorAdapterDefinition(Validator validator) {
          this.validator = validator;
      }
      
      public ValidatorAdapterDefinition(String validatorBean) {
          this.validatorBean = validatorBean;
      }
      
      public void setValidator(Validator validator) {
          this.validator = validator;
      }
      
      /**
       * Defines the static profile for the validation 
       * @param profile
       *          the profile to use
       */
      public ValidatorAdapterDefinition staticProfile(Object profile) {
          this.profile = profile;
          return this;
      }
      
      @Deprecated
      public ValidatorAdapterDefinition profile(Object profile) {
          this.profile = profile;
          return this;
      }
      
      /**
       * Defines the profile for the validation via the given expression 
       * @param profileExpression
       *          the profile expression
       */
      public ValidatorAdapterDefinition profile(Expression profileExpression) {
          this.profileExpression = profileExpression;
          return this;
      }
      
      /**
       * Defines the profile for the validation via the given closure 
       * @param profileExpression
       *          the profile closure
      */
     public ProcessorAdapterDefinition profile(@ClosureParams(value = SimpleType.class, options = { "org.apache.camel.Expression"})
                                                       Closure profileExpression) {
         this.profileExpression = new DelegatingExpression(profileExpression);
         return this;
     }
     
     /**
      * Interprets the defined profile as W3C schema location and validates against it 
      */
     public ValidatorAdapterDefinition xsd() {
         validator = new XsdValidator();
         return (ValidatorAdapterDefinition)input(bodyAs(StreamSource.class));
     }
     
     /**
      * Interprets the defined profile as Schematron rules location and validates against it 
      */
     public ValidatorAdapterDefinition schematron() {
         validator = new SchematronValidator();
         return (ValidatorAdapterDefinition)input(bodyAs(StreamSource.class));
     }
     
     @Override
     public String toString() {
         return "ValidatorAdapter[" + getOutputs() + "]";
     }
 
     @Override
     public String getShortName() {
         return "validatorAdapter";
     }
 
     @Override
     protected ProcessorAdapter doCreateProcessor(RouteContext routeContext) {
         if (validatorBean != null) {
             validator = routeContext.lookup(validatorBean, Validator.class);
         }
         ValidatorAdapter adapter = new ValidatorAdapter(validator);
         if (profile != null) {
             return adapter.staticProfile(profile);
         }
         if (profileExpression != null) {
             return adapter.profile(profileExpression);
         }
         return adapter;
     }
 
     private static class AlwaysValid implements Validator<Object, Object> {
 
         @Override
         public void validate(Object message, Object profile) {
             // any input is valid
         }
         
     }
     
 }