org.apache.lucene.document

## Class NumericDocValuesField

- java.lang.Object
- - org.apache.lucene.document.Field
  - - org.apache.lucene.document.NumericDocValuesField

- All Implemented Interfaces:
    IndexableField
  Direct Known Subclasses:
    DoubleDocValuesField, FloatDocValuesField

      public class NumericDocValuesField
      extends Field

  Field that stores a per-document `long` value for scoring, sorting or value retrieval. Here's an example usage:

         document.add(new NumericDocValuesField(name, 22L));

  If you also need to store the value, you should add a separate `StoredField` instance.

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from class org.apache.lucene.document.Field

      `Field.Store`

  - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static FieldType` | `TYPE` Type for numeric DocValues.

    - ### Fields inherited from class org.apache.lucene.document.Field

      `fieldsData, name, tokenStream, type`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `NumericDocValuesField(String name, long value)` Creates a new DocValues field with the specified 64-bit long value
    `NumericDocValuesField(String name, Long value)` Creates a new DocValues field with the specified 64-bit long value

  - ### Method Summary

    All Methods Static Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `static Query` | `newSlowExactQuery(String field, long value)` Create a query for matching an exact long value.
    `static Query` | `newSlowRangeQuery(String field, long lowerValue, long upperValue)` Create a range query that matches all documents whose value is between `lowerValue` and `upperValue` included.

    - ### Methods inherited from class org.apache.lucene.document.Field

      `binaryValue, fieldType, name, numericValue, readerValue, setBytesValue, setBytesValue, setByteValue, setDoubleValue, setFloatValue, setIntValue, setLongValue, setReaderValue, setShortValue, setStringValue, setTokenStream, stringValue, tokenStream, tokenStreamValue, toString`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

- - ### Field Detail

    - #### TYPE

          public static final FieldType TYPE

      Type for numeric DocValues.

  - ### Constructor Detail

    - #### NumericDocValuesField

          public NumericDocValuesField(String name,
                                       long value)

      Creates a new DocValues field with the specified 64-bit long value
      Parameters:
        `name` - field name
        `value` - 64-bit long value
      Throws:
        `IllegalArgumentException` - if the field name is null

    - #### NumericDocValuesField

          public NumericDocValuesField(String name,
                                       Long value)

      Creates a new DocValues field with the specified 64-bit long value
      Parameters:
        `name` - field name
        `value` - 64-bit long value or `null` if the existing fields value should be removed on update
      Throws:
        `IllegalArgumentException` - if the field name is null

  - ### Method Detail

    - #### newSlowRangeQuery

          public static Query newSlowRangeQuery(String field,
                                                long lowerValue,
                                                long upperValue)

      Create a range query that matches all documents whose value is between `lowerValue` and `upperValue` included.

      You can have half-open ranges (which are in fact </≤ or >/≥ queries) by setting `lowerValue = Long.MIN_VALUE` or `upperValue = Long.MAX_VALUE`.

      Ranges are inclusive. For exclusive ranges, pass `Math.addExact(lowerValue, 1)` or `Math.addExact(upperValue, -1)`.

      NOTE: Such queries cannot efficiently advance to the next match, which makes them slow if they are not ANDed with a selective query. As a consequence, they are best used wrapped in an `IndexOrDocValuesQuery`, alongside a range query that executes on points, such as `LongPoint.newRangeQuery(java.lang.String, long, long)`.

    - #### newSlowExactQuery

          public static Query newSlowExactQuery(String field,
                                                long value)

      Create a query for matching an exact long value.

      NOTE: Such queries cannot efficiently advance to the next match, which makes them slow if they are not ANDed with a selective query. As a consequence, they are best used wrapped in an `IndexOrDocValuesQuery`, alongside a range query that executes on points, such as `LongPoint.newExactQuery(java.lang.String, long)`.

Copyright © 2000-2018 Apache Software Foundation. All Rights Reserved.