content: /**
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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.solr.search.function;
  
  import org.apache.lucene.index.IndexReader;
  
  import java.io.IOException;
  import java.util.Map;
  
  /** A simple float function with a single argument
   */
   public abstract class SimpleFloatFunction extends SingleFunction {
    public SimpleFloatFunction(ValueSource source) {
      super(source);
    }
  
    protected abstract float func(int doc, DocValues vals);
  
    @Override
    public DocValues getValues(Map context, IndexReader reader) throws IOException {
      final DocValues vals =  source.getValues(context, reader);
      return new DocValues() {
        @Override
        public float floatVal(int doc) {
  	return func(doc, vals);
        }
        @Override
        public int intVal(int doc) {
          return (int)floatVal(doc);
        }
        @Override
        public long longVal(int doc) {
          return (long)floatVal(doc);
        }
        @Override
        public double doubleVal(int doc) {
          return (double)floatVal(doc);
        }
        @Override
        public String strVal(int doc) {
          return Float.toString(floatVal(doc));
        }
        @Override
        public String toString(int doc) {
  	return name() + '(' + vals.toString(doc) + ')';
        }
      };
    }
  }
  