1   package org.apache.lucene.queryParser.standard.config;
    2   
    3   /**
    4    * Licensed to the Apache Software Foundation (ASF) under one or more
    5    * contributor license agreements.  See the NOTICE file distributed with
    6    * this work for additional information regarding copyright ownership.
    7    * The ASF licenses this file to You under the Apache License, Version 2.0
    8    * (the "License"); you may not use this file except in compliance with
    9    * the License.  You may obtain a copy of the License at
   10    *
   11    *     http://www.apache.org/licenses/LICENSE-2.0
   12    *
   13    * Unless required by applicable law or agreed to in writing, software
   14    * distributed under the License is distributed on an "AS IS" BASIS,
   15    * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   16    * See the License for the specific language governing permissions and
   17    * limitations under the License.
   18    */
   19   
   20   import org.apache.lucene.queryParser.core.config.FieldConfig;
   21   import org.apache.lucene.queryParser.core.config.FieldConfigListener;
   22   import org.apache.lucene.queryParser.core.config.QueryConfigHandler;
   23   
   24   /**
   25    * This listener listens for every field configuration request and assign a
   26    * {@link BoostAttribute} to the equivalent {@link FieldConfig} based on a
   27    * defined map: fieldName -> boostValue store in {@link FieldBoostMapAttribute}
   28    * in the {@link FieldBoostMapAttribute}.
   29    * 
   30    * @see BoostAttribute
   31    * @see FieldBoostMapAttribute
   32    * @see FieldConfig
   33    * @see FieldConfigListener
   34    */
   35   public class FieldBoostMapFCListener implements FieldConfigListener {
   36   
   37     private static final long serialVersionUID = -5929802948798314067L;
   38   
   39     private QueryConfigHandler config = null;
   40     
   41     public FieldBoostMapFCListener(QueryConfigHandler config) {
   42       this.config = config;
   43     }
   44   
   45     public void buildFieldConfig(FieldConfig fieldConfig) {    
   46       if (this.config.hasAttribute(FieldBoostMapAttribute.class)) {
   47         FieldBoostMapAttribute fieldBoostMapAttr = this.config.getAttribute(FieldBoostMapAttribute.class);
   48         BoostAttribute boostAttr = fieldConfig.addAttribute(BoostAttribute.class);
   49         
   50         Float boost = fieldBoostMapAttr.getFieldBoostMap().get(fieldConfig.getFieldName());
   51   
   52         if (boost != null) {
   53           boostAttr.setBoost(boost.floatValue());
   54         }
   55   
   56       }
   57     }
   58   
   59   }