Package org.apache.lucene.search

# Class Explanation

java.lang.Object
org.apache.lucene.search.Explanation

public final class Explanation extends Object
Expert: Describes the score computation for document and query.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `boolean`
  `equals(Object o)`
  `String`
  `getDescription()`
  A description of this explanation node.
  `Explanation[]`
  `getDetails()`
  The sub-nodes of this explanation node.
  `Number`
  `getValue()`
  The value assigned to this explanation node.
  `int`
  `hashCode()`
  `boolean`
  `isMatch()`
  Indicates whether or not this Explanation models a match.
  `static Explanation`
  `match(Number value, String description, Collection<Explanation> details)`
  Create a new explanation for a match.
  `static Explanation`
  `match(Number value, String description, Explanation... details)`
  Create a new explanation for a match.
  `static Explanation`
  `noMatch(String description, Collection<Explanation> details)`
  Create a new explanation for a document which does not match.
  `static Explanation`
  `noMatch(String description, Explanation... details)`
  Create a new explanation for a document which does not match.
  `String`
  `toString()`
  Render an explanation as text.

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

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

- ## Method Details

  - ### match

    public static Explanation match(Number value, String description, Collection<Explanation> details)
    Create a new explanation for a match.
    Parameters:
      `value` - the contribution to the score of the document
      `description` - how `value` was computed
      `details` - sub explanations that contributed to this explanation

  - ### match

    public static Explanation match(Number value, String description, Explanation... details)
    Create a new explanation for a match.
    Parameters:
      `value` - the contribution to the score of the document
      `description` - how `value` was computed
      `details` - sub explanations that contributed to this explanation

  - ### noMatch

    public static Explanation noMatch(String description, Collection<Explanation> details)
    Create a new explanation for a document which does not match.

  - ### noMatch

    public static Explanation noMatch(String description, Explanation... details)
    Create a new explanation for a document which does not match.

  - ### isMatch

    public boolean isMatch()
    Indicates whether or not this Explanation models a match.

  - ### getValue

    public Number getValue()
    The value assigned to this explanation node.

  - ### getDescription

    public String getDescription()
    A description of this explanation node.

  - ### getDetails

    public Explanation[] getDetails()
    The sub-nodes of this explanation node.

  - ### toString

    public String toString()
    Render an explanation as text.
    Overrides:
      `toString` in class `Object`

  - ### equals

    public boolean equals(Object o)
    Overrides:
      `equals` in class `Object`

  - ### hashCode

    public int hashCode()
    Overrides:
      `hashCode` in class `Object`