/**

  * Copyright 2005-2013 Dozer Project

  *

  * 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.dozer.fieldmap;

 import org.apache.commons.lang3.builder.ReflectionToStringBuilder;

 import org.apache.commons.lang3.builder.ToStringStyle;

 import org.dozer.util.MappingUtils;

 import java.util.ArrayList;

 import java.util.List;

 import java.util.StringTokenizer;

 /**

  * Only intended for internal use.

  * 

  * @author garsombke.franz

  * @author sullins.ben

  * @author tierney.matt

  * 

  */

 public class HintContainer {

   private String hintName;

   private List<Class<?>> hints;

   public Class<?> getHint() {

     Class<?> result;

     if (hasMoreThanOneHint()) {

       return null;

     } else {

       result = getHints().get(0);

     }

     return result;

   }

   public Class<?> getHint(int index) {

     return getHints().get(index);

   }

   public boolean hasMoreThanOneHint() {

     return getHints().size() > 1;

   }

   public List<Class<?>> getHints() {

     if (hints == null) {

       List<Class<?>> list = new ArrayList<Class<?>>();

       StringTokenizer st = new StringTokenizer(this.hintName, ",");

       while (st.hasMoreElements()) {

         String theHintName = st.nextToken().trim();

         Class<?> clazz = MappingUtils.loadClass(theHintName);

         list.add(clazz);

       }

       hints = list;

     }

     return hints;

   }

   //TODO: Refactor/Relocate.  This method doesn't seem to belong in this class

   public Class<?> getHint(Class<?> clazz, List<Class<?>> clazzHints) {

     List<Class<?>> hints = getHints();

     int hintsSize = hints.size();

     if (hintsSize == 1) {

       return getHint();

     }

     // validate sizes

     if (clazzHints.size() != hintsSize) {

       MappingUtils

           .throwMappingException("When using multiple source and destination hints there must be exactly the same number of hints on the source and the destination.");

     }

     int count = 0;

     String myClazName = MappingUtils.getRealClass(clazz).getName();

     int size = clazzHints.size();

     for (int i = 0; i < size; i++) {

       Class<?> element = clazzHints.get(i);

       if (element.getName().equals(myClazName)) {

         return hints.get(count);

       }

       count++;

     }

     return clazz;

   }

   public void setHintName(String hintName) {

     this.hintName = hintName;

   }

   @Override

   public String toString() {

     return ReflectionToStringBuilder.toString(this, ToStringStyle.MULTI_LINE_STYLE);

   }

 }