org.apache.lucene.search

## Class MultiPhraseQuery

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

-     public class MultiPhraseQuery
      extends Query

  A generalized version of `PhraseQuery`, with the possibility of adding more than one term at the same position that are treated as a disjunction (OR). To use this class to search for the phrase "Microsoft app*" first create a Builder and use `MultiPhraseQuery.Builder.add(Term)` on the term "microsoft" (assuming lowercase analysis), then find all terms that have "app" as prefix using `LeafReader.terms(String)`, seeking to "app" then iterating and collecting terms until there is no longer that prefix, and finally use `MultiPhraseQuery.Builder.add(Term[])` to add them. `MultiPhraseQuery.Builder.build()` returns the fully constructed (and immutable) MultiPhraseQuery.

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class and Description
    --- | ---
    `static class` | `MultiPhraseQuery.Builder` A builder for multi-phrase queries

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `Weight` | `createWeight(IndexSearcher searcher, boolean needsScores)` Expert: Constructs an appropriate Weight implementation for this query.
    `boolean` | `equals(Object other)` Returns true if `o` is equal to this.
    `int[]` | `getPositions()` Returns the relative positions of terms in this phrase.
    `int` | `getSlop()` Sets the phrase slop for this query.
    `Term[][]` | `getTermArrays()` Returns the arrays of arrays of terms in the multi-phrase.
    `int` | `hashCode()` Returns a hash code value for this object.
    `Query` | `rewrite(IndexReader reader)` Expert: called to re-write queries into primitive queries.
    `String` | `toString(String f)` Prints a user-readable version of this query.

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

      `classHash, sameClassAs, toString`

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

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

- - ### Method Detail

    - #### getSlop

          public int getSlop()

      Sets the phrase slop for this query.
      See Also:
        `PhraseQuery.getSlop()`

    - #### getTermArrays

          public Term[][] getTermArrays()

      Returns the arrays of arrays of terms in the multi-phrase. Do not modify!

    - #### getPositions

          public int[] getPositions()

      Returns the relative positions of terms in this phrase. Do not modify!

    - #### rewrite

          public Query rewrite(IndexReader reader)
                        throws IOException

      Description copied from class: `Query`
      Expert: called to re-write queries into primitive queries. For example, a PrefixQuery will be rewritten into a BooleanQuery that consists of TermQuerys.
      Overrides:
        `rewrite` in class `Query`
      Throws:
        `IOException`

    - #### createWeight

          public Weight createWeight(IndexSearcher searcher,
                                     boolean needsScores)
                              throws IOException

      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.
      Throws:
        `IOException`

    - #### toString

          public final String toString(String f)

      Prints a user-readable version of this query.
      Specified by:
        `toString` in class `Query`

    - #### equals

          public boolean equals(Object other)

      Returns true if `o` is equal to this.
      Specified by:
        `equals` in class `Query`
      See Also:
        `Query.sameClassAs(Object)`, `Query.classHash()`

    - #### hashCode

          public int hashCode()

      Returns a hash code value for this object.
      Specified by:
        `hashCode` in class `Query`
      See Also:
        `Query.equals(Object)`

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