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.schema;
  
  import org.apache.lucene.search.SortField;
  import org.apache.solr.search.QParser;
  import org.apache.solr.search.function.ValueSource;
  import org.apache.solr.search.function.FieldCacheSource;
  import org.apache.solr.search.function.DocValues;
  import org.apache.solr.search.function.StringIndexDocValues;
  import org.apache.lucene.document.Fieldable;
  import org.apache.lucene.index.IndexReader;
  import org.apache.solr.util.NumberUtils;
  import org.apache.solr.response.TextResponseWriter;
  import org.apache.solr.response.XMLWriter;
  
  import java.util.Map;
  import java.io.IOException;
  /**
   * @version $Id: SortableFloatField.java 1071480 2011-02-17 02:23:10Z hossman $
   */
  public class SortableFloatField extends FieldType {
    @Override
    protected void init(IndexSchema schema, Map<String,String> args) {
    }
  
    @Override
    public SortField getSortField(SchemaField field,boolean reverse) {
      return getStringSort(field,reverse);
    }
  
    @Override
    public ValueSource getValueSource(SchemaField field, QParser qparser) {
      field.checkFieldCacheSource(qparser);
      return new SortableFloatFieldSource(field.name);
    }
  
    @Override
    public String toInternal(String val) {
      return NumberUtils.float2sortableStr(val);
    }
  
    @Override
    public String toExternal(Fieldable f) {
      return indexedToReadable(f.stringValue());
    }
  
    @Override
    public Float toObject(Fieldable f) {
      return NumberUtils.SortableStr2float(f.stringValue());
    }
    
    @Override
    public String indexedToReadable(String indexedForm) {
      return NumberUtils.SortableStr2floatStr(indexedForm);
    }
  
    @Override
    public void write(XMLWriter xmlWriter, String name, Fieldable f) throws IOException {
      String sval = f.stringValue();
      xmlWriter.writeFloat(name, NumberUtils.SortableStr2float(sval));
    }
  
    @Override
    public void write(TextResponseWriter writer, String name, Fieldable f) throws IOException {
      String sval = f.stringValue();
      writer.writeFloat(name, NumberUtils.SortableStr2float(sval));
    }
  }
  
  
  
  
  class SortableFloatFieldSource extends FieldCacheSource {
    protected float defVal;
  
    public SortableFloatFieldSource(String field) {
      this(field, 0.0f);
    }
  
    public SortableFloatFieldSource(String field, float defVal) {
      super(field);
      this.defVal = defVal;
    }
  
      @Override
      public String description() {
      return "sfloat(" + field + ')';
    }
  
    @Override
    public DocValues getValues(Map context, IndexReader reader) throws IOException {
      final float def = defVal;
  
      return new StringIndexDocValues(this, reader, field) {
        @Override
        protected String toTerm(String readableValue) {
          return NumberUtils.float2sortableStr(readableValue);
        }
  
        @Override
        public float floatVal(int doc) {
          int ord=order[doc];
          return ord==0 ? def  : NumberUtils.SortableStr2float(lookup[ord]);
        }
  
        @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 description() + '=' + floatVal(doc);
        }
      };
    }
  
    @Override
    public boolean equals(Object o) {
      return o instanceof SortableFloatFieldSource
              && super.equals(o)
              && defVal == ((SortableFloatFieldSource)o).defVal;
    }
  
    private static int hcode = SortableFloatFieldSource.class.hashCode();
    @Override
    public int hashCode() {
      return hcode + super.hashCode() + Float.floatToIntBits(defVal);
    };
  }
  
  
  
  
  