org.apache.lucene.queries.function

## Class FunctionValues

- java.lang.Object
- - org.apache.lucene.queries.function.FunctionValues

- Direct Known Subclasses:
    BoolDocValues, DocTermsIndexDocValues, DoubleDocValues, FloatDocValues, IntDocValues, LongDocValues, MultiFunction.Values, StrDocValues

      public abstract class FunctionValues
      extends Object

  Represents field values as different types. Normally created via a `ValueSource` for a particular field and reader.

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class and Description
    --- | ---
    `static class` | `FunctionValues.ValueFiller` Abstraction of the logic required to fill the value of a specified doc into a reusable `MutableValue`.

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `FunctionValues()`

  - ### Method Summary

    All Methods Instance Methods Abstract Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `boolean` | `boolVal(int doc)`
    `boolean` | `bytesVal(int doc, BytesRefBuilder target)` returns the bytes representation of the string val - TODO: should this return the indexed raw bytes not?
    `byte` | `byteVal(int doc)`
    `void` | `byteVal(int doc, byte[] vals)`
    `double` | `doubleVal(int doc)`
    `void` | `doubleVal(int doc, double[] vals)`
    `boolean` | `exists(int doc)` Returns true if there is a value for this document
    `Explanation` | `explain(int doc)`
    `float` | `floatVal(int doc)`
    `void` | `floatVal(int doc, float[] vals)`
    `ValueSourceScorer` | `getRangeScorer(LeafReaderContext readerContext, String lowerVal, String upperVal, boolean includeLower, boolean includeUpper)` Yields a `Scorer` that matches documents with values between the specified range, and that which produces scores equal to `floatVal(int)`.
    `ValueSourceScorer` | `getScorer(LeafReaderContext readerContext)` Yields a `Scorer` that matches all documents, and that which produces scores equal to `floatVal(int)`.
    `FunctionValues.ValueFiller` | `getValueFiller()`
    `int` | `intVal(int doc)`
    `void` | `intVal(int doc, int[] vals)`
    `long` | `longVal(int doc)`
    `void` | `longVal(int doc, long[] vals)`
    `int` | `numOrd()`
    `Object` | `objectVal(int doc)` Native Java Object representation of the value
    `int` | `ordVal(int doc)`
    `short` | `shortVal(int doc)`
    `void` | `shortVal(int doc, short[] vals)`
    `String` | `strVal(int doc)`
    `void` | `strVal(int doc, String[] vals)`
    `abstract String` | `toString(int doc)`

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

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

- - ### Constructor Detail

    - #### FunctionValues

          public FunctionValues()

  - ### Method Detail

    - #### byteVal

          public byte byteVal(int doc)

    - #### shortVal

          public short shortVal(int doc)

    - #### floatVal

          public float floatVal(int doc)

    - #### intVal

          public int intVal(int doc)

    - #### longVal

          public long longVal(int doc)

    - #### doubleVal

          public double doubleVal(int doc)

    - #### strVal

          public String strVal(int doc)

    - #### boolVal

          public boolean boolVal(int doc)

    - #### bytesVal

          public boolean bytesVal(int doc,
                                  BytesRefBuilder target)

      returns the bytes representation of the string val - TODO: should this return the indexed raw bytes not?

    - #### objectVal

          public Object objectVal(int doc)

      Native Java Object representation of the value

    - #### exists

          public boolean exists(int doc)

      Returns true if there is a value for this document

    - #### ordVal

          public int ordVal(int doc)

      Parameters:
        `doc` - The doc to retrieve to sort ordinal for
      Returns:
        the sort ordinal for the specified doc TODO: Maybe we can just use intVal for this...

    - #### numOrd

          public int numOrd()

      Returns:
        the number of unique sort ordinals this instance has

    - #### toString

          public abstract String toString(int doc)

    - #### getValueFiller

          public FunctionValues.ValueFiller getValueFiller()

      WARNING: This API is experimental and might change in incompatible ways in the next release.

    - #### byteVal

          public void byteVal(int doc,
                              byte[] vals)

    - #### shortVal

          public void shortVal(int doc,
                               short[] vals)

    - #### floatVal

          public void floatVal(int doc,
                               float[] vals)

    - #### intVal

          public void intVal(int doc,
                             int[] vals)

    - #### longVal

          public void longVal(int doc,
                              long[] vals)

    - #### doubleVal

          public void doubleVal(int doc,
                                double[] vals)

    - #### strVal

          public void strVal(int doc,
                             String[] vals)

    - #### explain

          public Explanation explain(int doc)

    - #### getScorer

          public ValueSourceScorer getScorer(LeafReaderContext readerContext)

      Yields a `Scorer` that matches all documents, and that which produces scores equal to `floatVal(int)`.

    - #### getRangeScorer

          public ValueSourceScorer getRangeScorer(LeafReaderContext readerContext,
                                                  String lowerVal,
                                                  String upperVal,
                                                  boolean includeLower,
                                                  boolean includeUpper)

      Yields a `Scorer` that matches documents with values between the specified range, and that which produces scores equal to `floatVal(int)`.

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