Package org.apache.lucene.document

# Class FloatRange

java.lang.Object
org.apache.lucene.document.Field
org.apache.lucene.document.FloatRange

All Implemented Interfaces:
  `IndexableField`

public class FloatRange extends Field
An indexed Float Range field.

This field indexes dimensional ranges defined as min/max pairs. It supports up to a maximum of 4 dimensions (indexed as 8 numeric values). With 1 dimension representing a single float range, 2 dimensions representing a bounding box, 3 dimensions a bounding cube, and 4 dimensions a tesseract.

Multiple values for the same field in one document is supported, and open ended ranges can be defined using `Float.NEGATIVE_INFINITY` and `Float.POSITIVE_INFINITY`.

This field defines the following static factory methods for common search operations over float ranges:

- `newIntersectsQuery()` matches ranges that intersect the defined search range.
- `newWithinQuery()` matches ranges that are within the defined search range.
- `newContainsQuery()` matches ranges that contain the defined search range.

- ## Nested Class Summary

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

  `Field.Store`

- ## Field Summary

  Fields
  Modifier and Type
  Field
  Description
  `static final int`
  `BYTES`
  stores float values so number of bytes is 4

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

  `fieldsData, name, type`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `FloatRange(String name, float[] min, float[] max)`
  Create a new FloatRange type, from min/max parallel arrays

- ## Method Summary

  Modifier and Type
  Method
  Description
  `float`
  `getMax(int dimension)`
  Get the max value for the given dimension
  `float`
  `getMin(int dimension)`
  Get the min value for the given dimension
  `static Query`
  `newContainsQuery(String field, float[] min, float[] max)`
  Create a query for matching indexed float ranges that contain the defined range.
  `static Query`
  `newCrossesQuery(String field, float[] min, float[] max)`
  Create a query for matching indexed ranges that cross the defined range.
  `static Query`
  `newIntersectsQuery(String field, float[] min, float[] max)`
  Create a query for matching indexed ranges that intersect the defined range.
  `static Query`
  `newWithinQuery(String field, float[] min, float[] max)`
  Create a query for matching indexed ranges that are within the defined range.
  `void`
  `setRangeValues(float[] min, float[] max)`
  Changes the values of the field.
  `String`
  `toString()`
  Prints a Field for human consumption.

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

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

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

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

- ## Field Details

  - ### BYTES

    public static final int BYTES
    stores float values so number of bytes is 4
    See Also:
      - Constant Field Values

- ## Constructor Details

  - ### FloatRange

    public FloatRange(String name, float[] min, float[] max)
    Create a new FloatRange type, from min/max parallel arrays
    Parameters:
      `name` - field name. must not be null.
      `min` - range min values; each entry is the min value for the dimension
      `max` - range max values; each entry is the max value for the dimension

- ## Method Details

  - ### setRangeValues

    public void setRangeValues(float[] min, float[] max)
    Changes the values of the field.
    Parameters:
      `min` - array of min values. (accepts `Float.NEGATIVE_INFINITY`)
      `max` - array of max values. (accepts `Float.POSITIVE_INFINITY`)
    Throws:
      `IllegalArgumentException` - if `min` or `max` is invalid

  - ### getMin

    public float getMin(int dimension)
    Get the min value for the given dimension
    Parameters:
      `dimension` - the dimension, always positive
    Returns:
      the decoded min value

  - ### getMax

    public float getMax(int dimension)
    Get the max value for the given dimension
    Parameters:
      `dimension` - the dimension, always positive
    Returns:
      the decoded max value

  - ### newIntersectsQuery

    public static Query newIntersectsQuery(String field, float[] min, float[] max)
    Create a query for matching indexed ranges that intersect the defined range.
    Parameters:
      `field` - field name. must not be null.
      `min` - array of min values. (accepts `Float.NEGATIVE_INFINITY`)
      `max` - array of max values. (accepts `Float.MAX_VALUE`)
    Returns:
      query for matching intersecting ranges (overlap, within, or contains)
    Throws:
      `IllegalArgumentException` - if `field` is null, `min` or `max` is invalid

  - ### newContainsQuery

    public static Query newContainsQuery(String field, float[] min, float[] max)
    Create a query for matching indexed float ranges that contain the defined range.
    Parameters:
      `field` - field name. must not be null.
      `min` - array of min values. (accepts `Float.NEGATIVE_INFINITY`)
      `max` - array of max values. (accepts `Float.POSITIVE_INFINITY`)
    Returns:
      query for matching ranges that contain the defined range
    Throws:
      `IllegalArgumentException` - if `field` is null, `min` or `max` is invalid

  - ### newWithinQuery

    public static Query newWithinQuery(String field, float[] min, float[] max)
    Create a query for matching indexed ranges that are within the defined range.
    Parameters:
      `field` - field name. must not be null.
      `min` - array of min values. (accepts `Float.NEGATIVE_INFINITY`)
      `max` - array of max values. (accepts `Float.POSITIVE_INFINITY`)
    Returns:
      query for matching ranges within the defined range
    Throws:
      `IllegalArgumentException` - if `field` is null, `min` or `max` is invalid

  - ### newCrossesQuery

    public static Query newCrossesQuery(String field, float[] min, float[] max)
    Create a query for matching indexed ranges that cross the defined range. A CROSSES is defined as any set of ranges that are not disjoint and not wholly contained by the query. Effectively, its the complement of union(WITHIN, DISJOINT).
    Parameters:
      `field` - field name. must not be null.
      `min` - array of min values. (accepts `Float.NEGATIVE_INFINITY`)
      `max` - array of max values. (accepts `Float.POSITIVE_INFINITY`)
    Returns:
      query for matching ranges within the defined range
    Throws:
      `IllegalArgumentException` - if `field` is null, `min` or `max` is invalid

  - ### toString

    public String toString()
    Description copied from class: `Field`
    Prints a Field for human consumption.
    Overrides:
      `toString` in class `Field`