/**
    *    Copyright 2009-2015 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.apache.ibatis.mapping;
  
  import java.util.Collections;
  import java.util.Map;
  
  import org.apache.ibatis.session.Configuration;
  
  /**
   * @author Clinton Begin
   */
  public class Discriminator {
  
    private ResultMapping resultMapping;
    private Map<String, String> discriminatorMap;
  
    Discriminator() {
    }
  
    public static class Builder {
      private Discriminator discriminator = new Discriminator();
  
      public Builder(Configuration configuration, ResultMapping resultMapping, Map<String, String> discriminatorMap) {
        discriminator.resultMapping = resultMapping;
        discriminator.discriminatorMap = discriminatorMap;
      }
  
      public Discriminator build() {
        assert discriminator.resultMapping != null;
        assert discriminator.discriminatorMap != null;
        assert !discriminator.discriminatorMap.isEmpty();
        //lock down map
        discriminator.discriminatorMap = Collections.unmodifiableMap(discriminator.discriminatorMap);
        return discriminator;
      }
    }
  
    public ResultMapping getResultMapping() {
      return resultMapping;
    }
  
    public Map<String, String> getDiscriminatorMap() {
      return discriminatorMap;
    }
  
    public String getMapIdFor(String s) {
      return discriminatorMap.get(s);
    }
  
  }