/**
    * Copyright 2005-2013 The Kuali Foundation
    *
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    *
   * 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.kuali.rice.krms.service.impl;
  
  import org.kuali.rice.krms.framework.engine.expression.ComparisonOperator;
  import org.kuali.rice.krms.builder.ComponentBuilder;
  import org.kuali.rice.krms.service.TemplateRegistry;
  import org.kuali.rice.krms.dto.TemplateInfo;
  
  import java.util.HashMap;
  import java.util.Map;
  
  /**
   * Provides a hashmap implementation that contains rule statement (proposition) types to
   * template information relationships.
   *
   * @author Kuali Student Team
   */
  public class TemplateRegistryImpl implements TemplateRegistry {
  
      private Map<String, TemplateInfo> templatesMap;
      private Map<String, ComponentBuilder> componentBuilderMap = new HashMap<String, ComponentBuilder>();
  
      public void setTemplatesMap(Map<String, TemplateInfo> templatesMap) {
          this.templatesMap = templatesMap;
      }
  
      public TemplateInfo getTemplateForType(String type) {
          TemplateInfo template = templatesMap.get(type);
          return (template != null ? template : null);
      }
  
      public String getTermSpecNameForType(String type) {
          TemplateInfo template = templatesMap.get(type);
          return (template != null ? template.getTermSpecName() : null);
      }
  
      public String getOperationForType(String type) {
          TemplateInfo template = templatesMap.get(type);
          if (template == null) {
              return null;
          }
          ComparisonOperator operator = ComparisonOperator.fromCode(template.getOperator());
          return (operator != null ? operator.getCode() : null);
      }
  
      public String getValueForType(String type) {
          TemplateInfo template = templatesMap.get(type);
          return (template != null ? template.getValue() : null);
      }
  
      public ComponentBuilder getComponentBuilderForType(String type){
          TemplateInfo template = templatesMap.get(type);
          if ((template == null) || (template.getComponentBuilderClass() == null)){
              return null;
          }
  
          ComponentBuilder builder = componentBuilderMap.get(template.getComponentBuilderClass());
          if (builder == null){
              try {
                  builder = (ComponentBuilder) Class.forName(template.getComponentBuilderClass()).newInstance();
                  componentBuilderMap.put(template.getComponentBuilderClass(), builder);
              } catch (Exception e) {
                  throw new RuntimeException("Unable to locate component builder for class " + template.getComponentBuilderClass());
              }
          }
  
          return builder;
      }
  
  }