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 org.apache.lucene.search.FieldCache;
  
  
  import java.io.IOException;
  import java.util.Map;
  
  /**
   * Obtains float field values from the {@link org.apache.lucene.search.FieldCache}
   * using <code>getFloats()</code>
   * and makes those values available as other numeric types, casting as needed.
   *
   * @version $Id: FloatFieldSource.java 555343 2007-07-11 17:46:25Z hossman $
   */
  
  public class LongFieldSource extends FieldCacheSource {
    protected FieldCache.LongParser parser;
  
    public LongFieldSource(String field) {
      this(field, null);
    }
  
    public LongFieldSource(String field, FieldCache.LongParser parser) {
      super(field);
      this.parser = parser;
    }
  
    @Override
    public String description() {
      return "long(" + field + ')';
    }
  
  
    public long externalToLong(String extVal) {
      return Long.parseLong(extVal);
    }
  
    @Override
    public DocValues getValues(Map context, IndexReader reader) throws IOException {
      final long[] arr = (parser == null) ?
              cache.getLongs(reader, field) :
              cache.getLongs(reader, field, parser);
      return new DocValues() {
        @Override
        public float floatVal(int doc) {
          return (float) arr[doc];
        }
  
        @Override
        public int intVal(int doc) {
          return (int) arr[doc];
        }
  
        @Override
        public long longVal(int doc) {
          return arr[doc];
        }
  
        @Override
        public double doubleVal(int doc) {
          return arr[doc];
        }
  
        @Override
        public String strVal(int doc) {
          return Long.toString(arr[doc]);
        }
  
        @Override
        public String toString(int doc) {
          return description() + '=' + longVal(doc);
        }
  
        @Override
        public ValueSourceScorer getRangeScorer(IndexReader reader, String lowerVal, String upperVal, boolean includeLower, boolean includeUpper) {
          long lower,upper;
  
          // instead of using separate comparison functions, adjust the endpoints.
  
          if (lowerVal==null) {
            lower = Long.MIN_VALUE;
          } else {
            lower = externalToLong(lowerVal);
            if (!includeLower && lower < Long.MAX_VALUE) lower++;
          }
  
           if (upperVal==null) {
            upper = Long.MAX_VALUE;
          } else {
            upper = externalToLong(upperVal);
            if (!includeUpper && upper > Long.MIN_VALUE) upper--;
          }
  
          final long ll = lower;
          final long uu = upper;
  
          return new ValueSourceScorer(reader, this) {
            @Override
            public boolean matchesValue(int doc) {
              long val = arr[doc];
              // only check for deleted if it's the default value
              // if (val==0 && reader.isDeleted(doc)) return false;
              return val >= ll && val <= uu;
            }
          };
        }
  
  
      };
    }
  
    @Override
    public boolean equals(Object o) {
      if (o.getClass() != this.getClass()) return false;
      LongFieldSource other = (LongFieldSource) o;
      return super.equals(other)
              && (this.parser == null ? other.parser == null :
              this.parser.getClass() == other.parser.getClass());
    }
  
    @Override
    public int hashCode() {
      int h = parser == null ? this.getClass().hashCode() : parser.getClass().hashCode();
      h += super.hashCode();
      return h;
    }
  
  }
  