org.apache.lucene.search

## Class MatchAllDocsQuery

- java.lang.Object
- - org.apache.lucene.search.Query
  - - org.apache.lucene.search.MatchAllDocsQuery

- All Implemented Interfaces:
    Cloneable

      public final class MatchAllDocsQuery
      extends Query

  A query that matches all documents.

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `MatchAllDocsQuery()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `Weight` | `createWeight(IndexSearcher searcher, boolean needsScores)` Expert: Constructs an appropriate Weight implementation for this query.
    `String` | `toString(String field)` Prints a query to a string, with `field` assumed to be the default field and omitted.

    - ### Methods inherited from class org.apache.lucene.search.Query

      `clone, equals, getBoost, hashCode, rewrite, setBoost, toString`

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

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

- - ### Constructor Detail

    - #### MatchAllDocsQuery

          public MatchAllDocsQuery()

  - ### Method Detail

    - #### createWeight

          public Weight createWeight(IndexSearcher searcher,
                            boolean needsScores)

      Description copied from class: `Query`
      Expert: Constructs an appropriate Weight implementation for this query.

      Only implemented by primitive queries, which re-write to themselves.

      Overrides:
        `createWeight` in class `Query`
        `needsScores` - True if document scores (`Scorer.score()`) or match frequencies (`Scorer.freq()`) are needed.

    - #### toString

          public String toString(String field)

      Description copied from class: `Query`
      Prints a query to a string, with `field` assumed to be the default field and omitted.
      Specified by:
        `toString` in class `Query`

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