org.apache.lucene.search.spans

## Class SpanNearQuery

- java.lang.Object
- - org.apache.lucene.search.Query
  - - org.apache.lucene.search.spans.SpanQuery
    - - org.apache.lucene.search.spans.SpanNearQuery

- All Implemented Interfaces:
    Cloneable

      public class SpanNearQuery
      extends SpanQuery
      implements Cloneable

  Matches spans which are near one another. One can specify slop, the maximum number of intervening unmatched positions, as well as whether matches are required to be in-order.

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class and Description
    --- | ---
    `static class` | `SpanNearQuery.Builder` A builder for SpanNearQueries
    `class` | `SpanNearQuery.SpanNearWeight`

  - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected List<SpanQuery>` | `clauses`
    `protected String` | `field`
    `protected boolean` | `inOrder`
    `protected int` | `slop`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `SpanNearQuery(SpanQuery[] clauses, int slop, boolean inOrder)` Construct a SpanNearQuery.
    `SpanNearQuery(SpanQuery[] clausesIn, int slop, boolean inOrder, boolean collectPayloads)` Deprecated. Use `SpanNearQuery(SpanQuery[], int, boolean)`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `SpanWeight` | `createWeight(IndexSearcher searcher, boolean needsScores)` Create a SpanWeight for this query
    `boolean` | `equals(Object o)` Returns true iff `o` is equal to this.
    `SpanQuery[]` | `getClauses()` Return the clauses whose spans are matched.
    `String` | `getField()` Returns the name of the field matched by this query.
    `int` | `getSlop()` Return the maximum number of intervening unmatched positions permitted.
    `int` | `hashCode()`
    `boolean` | `isInOrder()` Return true if matches are required to be in-order.
    `static SpanNearQuery.Builder` | `newOrderedNearQuery(String field)` Returns a `SpanNearQuery.Builder` for an ordered query on a particular field
    `static SpanNearQuery.Builder` | `newUnorderedNearQuery(String field)` Returns a `SpanNearQuery.Builder` for an unordered query on a particular field
    `Query` | `rewrite(IndexReader reader)` Expert: called to re-write queries into primitive queries.
    `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.spans.SpanQuery

      `getTermContexts, getTermContexts`

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

      `clone, getBoost, setBoost, toString`

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

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

- - ### Field Detail

    - #### clauses

          protected List<SpanQuery> clauses

    - #### slop

          protected int slop

    - #### inOrder

          protected boolean inOrder

    - #### field

          protected String field

  - ### Constructor Detail

    - #### SpanNearQuery

          public SpanNearQuery(SpanQuery[] clauses,
                       int slop,
                       boolean inOrder)

      Construct a SpanNearQuery. Matches spans matching a span from each clause, with up to `slop` total unmatched positions between them.
      When `inOrder` is true, the spans from each clause must be in the same order as in `clauses` and must be non-overlapping.
      When `inOrder` is false, the spans from each clause need not be ordered and may overlap.
      Parameters:
        `clauses` - the clauses to find near each other, in the same field, at least 2.
        `slop` - The slop value
        `inOrder` - true if order is important

    - #### SpanNearQuery

          @Deprecated
          public SpanNearQuery(SpanQuery[] clausesIn,
                                  int slop,
                                  boolean inOrder,
                                  boolean collectPayloads)

      Deprecated. Use `SpanNearQuery(SpanQuery[], int, boolean)`

  - ### Method Detail

    - #### newOrderedNearQuery

          public static SpanNearQuery.Builder newOrderedNearQuery(String field)

      Returns a `SpanNearQuery.Builder` for an ordered query on a particular field

    - #### newUnorderedNearQuery

          public static SpanNearQuery.Builder newUnorderedNearQuery(String field)

      Returns a `SpanNearQuery.Builder` for an unordered query on a particular field

    - #### getClauses

          public SpanQuery[] getClauses()

      Return the clauses whose spans are matched.

    - #### getSlop

          public int getSlop()

      Return the maximum number of intervening unmatched positions permitted.

    - #### isInOrder

          public boolean isInOrder()

      Return true if matches are required to be in-order.

    - #### getField

          public String getField()

      Description copied from class: `SpanQuery`
      Returns the name of the field matched by this query.
      Specified by:
        `getField` in class `SpanQuery`

    - #### 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`

    - #### createWeight

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

      Description copied from class: `SpanQuery`
      Create a SpanWeight for this query
      Specified by:
        `createWeight` in class `SpanQuery`
      Parameters:
        `searcher` - the IndexSearcher to be searched across
        `needsScores` - if the query needs scores
      Returns:
        a SpanWeight
      Throws:
        `IOException` - on error

    - #### 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 `SpanQuery`
      Throws:
        `IOException`

    - #### equals

          public boolean equals(Object o)

      Returns true iff `o` is equal to this.
      Overrides:
        `equals` in class `Query`

    - #### hashCode

          public int hashCode()

      Overrides:
        `hashCode` in class `Query`

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