## org.apache.lucene.search
Class MatchAllDocsQuery

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

All Implemented Interfaces:
  Serializable, Cloneable

    public class MatchAllDocsQuery

extends Query

A query that matches all documents.

Author:
  John Wang
See Also:
  Serialized Form

Constructor Summary
`MatchAllDocsQuery()`

Method Summary
`protected Weight` `createWeight(Searcher searcher)` Expert: Constructs an appropriate Weight implementation for this query.
`boolean` `equals(Object o)`
`void` `extractTerms(Set terms)` Expert: adds all terms occuring in this query to the terms set.
`int` `hashCode()`
`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, combine, getBoost, getSimilarity, mergeBooleanQueries, rewrite, setBoost, toString, weight`

Methods inherited from class java.lang.Object
`finalize, getClass, notify, notifyAll, wait, wait, wait`

Constructor Detail

### MatchAllDocsQuery

    public MatchAllDocsQuery()

Method Detail

### createWeight

    protected Weight createWeight(Searcher searcher)

  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`

### extractTerms

    public void extractTerms(Set terms)

  Description copied from class: `Query`
  Expert: adds all terms occuring in this query to the terms set. Only works if this query is in its `rewritten` form.

  Overrides:
    `extractTerms` in class `Query`

### 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.

  The representation used is one that is supposed to be readable by `QueryParser`. However, there are the following limitations:

  - If the query was created by the parser, the printed representation may not be exactly what was parsed. For example, characters that need to be escaped will be represented without the required backslash.
  - Some of the more complicated queries (e.g. span queries) don't have a representation that can be parsed by QueryParser.

  Specified by:
    `toString` in class `Query`

### equals

    public boolean equals(Object o)

  Overrides:
    `equals` in class `Object`

### hashCode

    public int hashCode()

  Overrides:
    `hashCode` in class `Object`

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