org.apache.lucene.util

## Class QueryBuilder

- java.lang.Object
- - org.apache.lucene.util.QueryBuilder

-     public class QueryBuilder
      extends Object

  Creates queries from the `Analyzer` chain.

  Example usage:

         QueryBuilder builder = new QueryBuilder(analyzer);
         Query a = builder.createBooleanQuery("body", "just a test");
         Query b = builder.createPhraseQuery("body", "another test");
         Query c = builder.createMinShouldMatchQuery("body", "another test", 0.5f);

  This can also be used as a subclass for query parsers to make it easier to interact with the analysis chain. Factory methods such as `newTermQuery` are provided so that the generated queries can be customized.

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected Analyzer` | `analyzer`
    `protected boolean` | `autoGenerateMultiTermSynonymsPhraseQuery`
    `protected boolean` | `enableGraphQueries`
    `protected boolean` | `enablePositionIncrements`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `QueryBuilder(Analyzer analyzer)` Creates a new QueryBuilder using the given analyzer.

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `protected void` | `add(BooleanQuery.Builder q, List<Term> current, BooleanClause.Occur operator)`
    `protected Query` | `analyzeBoolean(String field, TokenStream stream)` Creates simple boolean query from the cached tokenstream contents
    `protected Query` | `analyzeGraphBoolean(String field, TokenStream source, BooleanClause.Occur operator)` Creates a boolean query from a graph token stream.
    `protected SpanQuery` | `analyzeGraphPhrase(TokenStream source, String field, int phraseSlop)` Creates a span near (phrase) query from a graph token stream.
    `protected Query` | `analyzeMultiBoolean(String field, TokenStream stream, BooleanClause.Occur operator)` Creates complex boolean query from the cached tokenstream contents
    `protected Query` | `analyzeMultiPhrase(String field, TokenStream stream, int slop)` Creates complex phrase query from the cached tokenstream contents
    `protected Query` | `analyzePhrase(String field, TokenStream stream, int slop)` Creates simple phrase query from the cached tokenstream contents
    `protected Query` | `analyzeTerm(String field, TokenStream stream)` Creates simple term query from the cached tokenstream contents
    `Query` | `createBooleanQuery(String field, String queryText)` Creates a boolean query from the query text.
    `Query` | `createBooleanQuery(String field, String queryText, BooleanClause.Occur operator)` Creates a boolean query from the query text.
    `protected Query` | `createFieldQuery(Analyzer analyzer, BooleanClause.Occur operator, String field, String queryText, boolean quoted, int phraseSlop)` Creates a query from the analysis chain.
    `protected Query` | `createFieldQuery(TokenStream source, BooleanClause.Occur operator, String field, boolean quoted, int phraseSlop)` Creates a query from a token stream.
    `Query` | `createMinShouldMatchQuery(String field, String queryText, float fraction)` Creates a minimum-should-match query from the query text.
    `Query` | `createPhraseQuery(String field, String queryText)` Creates a phrase query from the query text.
    `Query` | `createPhraseQuery(String field, String queryText, int phraseSlop)` Creates a phrase query from the query text.
    `protected SpanQuery` | `createSpanQuery(TokenStream in, String field)` Creates a span query from the tokenstream.
    `Analyzer` | `getAnalyzer()` Returns the analyzer.
    `boolean` | `getAutoGenerateMultiTermSynonymsPhraseQuery()` Returns true if phrase query should be automatically generated for multi terms synonyms.
    `boolean` | `getEnableGraphQueries()` Returns true if graph TokenStream processing is enabled (default).
    `boolean` | `getEnablePositionIncrements()` Returns true if position increments are enabled.
    `protected BooleanQuery.Builder` | `newBooleanQuery()` Builds a new BooleanQuery instance.
    `protected Query` | `newGraphSynonymQuery(Iterator<Query> queries)` Builds a new GraphQuery for multi-terms synonyms.
    `protected MultiPhraseQuery.Builder` | `newMultiPhraseQueryBuilder()` Builds a new MultiPhraseQuery instance.
    `protected Query` | `newSynonymQuery(Term[] terms)` Builds a new SynonymQuery instance.
    `protected Query` | `newTermQuery(Term term)` Builds a new TermQuery instance.
    `void` | `setAnalyzer(Analyzer analyzer)` Sets the analyzer used to tokenize text.
    `void` | `setAutoGenerateMultiTermSynonymsPhraseQuery(boolean enable)` Set to `true` if phrase queries should be automatically generated for multi terms synonyms.
    `void` | `setEnableGraphQueries(boolean v)` Enable or disable graph TokenStream processing (enabled by default).
    `void` | `setEnablePositionIncrements(boolean enable)` Set to `true` to enable position increments in result query.

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

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Field Detail

    - #### analyzer

          protected Analyzer analyzer

    - #### enablePositionIncrements

          protected boolean enablePositionIncrements

    - #### enableGraphQueries

          protected boolean enableGraphQueries

    - #### autoGenerateMultiTermSynonymsPhraseQuery

          protected boolean autoGenerateMultiTermSynonymsPhraseQuery

  - ### Constructor Detail

    - #### QueryBuilder

          public QueryBuilder(Analyzer analyzer)

      Creates a new QueryBuilder using the given analyzer.

  - ### Method Detail

    - #### createBooleanQuery

          public Query createBooleanQuery(String field,
                                          String queryText)

      Creates a boolean query from the query text.

      This is equivalent to `createBooleanQuery(field, queryText, Occur.SHOULD)`

      Parameters:
        `field` - field name
        `queryText` - text to be passed to the analyzer
      Returns:
        `TermQuery` or `BooleanQuery`, based on the analysis of `queryText`

    - #### createBooleanQuery

          public Query createBooleanQuery(String field,
                                          String queryText,
                                          BooleanClause.Occur operator)

      Creates a boolean query from the query text.

      Parameters:
        `field` - field name
        `queryText` - text to be passed to the analyzer
        `operator` - operator used for clauses between analyzer tokens.
      Returns:
        `TermQuery` or `BooleanQuery`, based on the analysis of `queryText`

    - #### createPhraseQuery

          public Query createPhraseQuery(String field,
                                         String queryText)

      Creates a phrase query from the query text.

      This is equivalent to `createPhraseQuery(field, queryText, 0)`

      Parameters:
        `field` - field name
        `queryText` - text to be passed to the analyzer
      Returns:
        `TermQuery`, `BooleanQuery`, `PhraseQuery`, or `MultiPhraseQuery`, based on the analysis of `queryText`

    - #### createPhraseQuery

          public Query createPhraseQuery(String field,
                                         String queryText,
                                         int phraseSlop)

      Creates a phrase query from the query text.

      Parameters:
        `field` - field name
        `queryText` - text to be passed to the analyzer
        `phraseSlop` - number of other words permitted between words in query phrase
      Returns:
        `TermQuery`, `BooleanQuery`, `PhraseQuery`, or `MultiPhraseQuery`, based on the analysis of `queryText`

    - #### createMinShouldMatchQuery

          public Query createMinShouldMatchQuery(String field,
                                                 String queryText,
                                                 float fraction)

      Creates a minimum-should-match query from the query text.

      Parameters:
        `field` - field name
        `queryText` - text to be passed to the analyzer
        `fraction` - of query terms `[0..1]` that should match
      Returns:
        `TermQuery` or `BooleanQuery`, based on the analysis of `queryText`

    - #### getAnalyzer

          public Analyzer getAnalyzer()

      Returns the analyzer.
      See Also:
        `setAnalyzer(Analyzer)`

    - #### setAnalyzer

          public void setAnalyzer(Analyzer analyzer)

      Sets the analyzer used to tokenize text.

    - #### getEnablePositionIncrements

          public boolean getEnablePositionIncrements()

      Returns true if position increments are enabled.
      See Also:
        `setEnablePositionIncrements(boolean)`

    - #### setEnablePositionIncrements

          public void setEnablePositionIncrements(boolean enable)

      Set to `true` to enable position increments in result query.

      When set, result phrase and multi-phrase queries will be aware of position increments. Useful when e.g. a StopFilter increases the position increment of the token that follows an omitted token.

      Default: true.

    - #### getAutoGenerateMultiTermSynonymsPhraseQuery

          public boolean getAutoGenerateMultiTermSynonymsPhraseQuery()

      Returns true if phrase query should be automatically generated for multi terms synonyms.
      See Also:
        `setAutoGenerateMultiTermSynonymsPhraseQuery(boolean)`

    - #### setAutoGenerateMultiTermSynonymsPhraseQuery

          public void setAutoGenerateMultiTermSynonymsPhraseQuery(boolean enable)

      Set to `true` if phrase queries should be automatically generated for multi terms synonyms. Default: false.

    - #### createFieldQuery

          protected Query createFieldQuery(Analyzer analyzer,
                                           BooleanClause.Occur operator,
                                           String field,
                                           String queryText,
                                           boolean quoted,
                                           int phraseSlop)

      Creates a query from the analysis chain.

      Expert: this is more useful for subclasses such as queryparsers. If using this class directly, just use `createBooleanQuery(String, String)` and `createPhraseQuery(String, String)`. This is a complex method and it is usually not necessary to override it in a subclass; instead, override methods like `newBooleanQuery()`, etc., if possible.

      Parameters:
        `analyzer` - analyzer used for this query
        `operator` - default boolean operator used for this query
        `field` - field to create queries against
        `queryText` - text to be passed to the analysis chain
        `quoted` - true if phrases should be generated when terms occur at more than one position
        `phraseSlop` - slop factor for phrase/multiphrase queries

    - #### setEnableGraphQueries

          public void setEnableGraphQueries(boolean v)

      Enable or disable graph TokenStream processing (enabled by default).
      WARNING: This API is experimental and might change in incompatible ways in the next release.

    - #### getEnableGraphQueries

          public boolean getEnableGraphQueries()

      Returns true if graph TokenStream processing is enabled (default).
      WARNING: This API is experimental and might change in incompatible ways in the next release.

    - #### createFieldQuery

          protected Query createFieldQuery(TokenStream source,
                                           BooleanClause.Occur operator,
                                           String field,
                                           boolean quoted,
                                           int phraseSlop)

      Creates a query from a token stream.
      Parameters:
        `source` - the token stream to create the query from
        `operator` - default boolean operator used for this query
        `field` - field to create queries against
        `quoted` - true if phrases should be generated when terms occur at more than one position
        `phraseSlop` - slop factor for phrase/multiphrase queries

    - #### createSpanQuery

          protected final SpanQuery createSpanQuery(TokenStream in,
                                                    String field)
                                             throws IOException

      Creates a span query from the tokenstream. In the case of a single token, a simple `SpanTermQuery` is returned. When multiple tokens, an ordered `SpanNearQuery` with slop of 0 is returned.
      Throws:
        `IOException`

    - #### analyzeTerm

          protected Query analyzeTerm(String field,
                                      TokenStream stream)
                               throws IOException

      Creates simple term query from the cached tokenstream contents
      Throws:
        `IOException`

    - #### analyzeBoolean

          protected Query analyzeBoolean(String field,
                                         TokenStream stream)
                                  throws IOException

      Creates simple boolean query from the cached tokenstream contents
      Throws:
        `IOException`

    - #### add

          protected void add(BooleanQuery.Builder q,
                             List<Term> current,
                             BooleanClause.Occur operator)

    - #### analyzeMultiBoolean

          protected Query analyzeMultiBoolean(String field,
                                              TokenStream stream,
                                              BooleanClause.Occur operator)
                                       throws IOException

      Creates complex boolean query from the cached tokenstream contents
      Throws:
        `IOException`

    - #### analyzePhrase

          protected Query analyzePhrase(String field,
                                        TokenStream stream,
                                        int slop)
                                 throws IOException

      Creates simple phrase query from the cached tokenstream contents
      Throws:
        `IOException`

    - #### analyzeMultiPhrase

          protected Query analyzeMultiPhrase(String field,
                                             TokenStream stream,
                                             int slop)
                                      throws IOException

      Creates complex phrase query from the cached tokenstream contents
      Throws:
        `IOException`

    - #### analyzeGraphBoolean

          protected Query analyzeGraphBoolean(String field,
                                              TokenStream source,
                                              BooleanClause.Occur operator)
                                       throws IOException

      Creates a boolean query from a graph token stream. The articulation points of the graph are visited in order and the queries created at each point are merged in the returned boolean query.
      Throws:
        `IOException`

    - #### analyzeGraphPhrase

          protected SpanQuery analyzeGraphPhrase(TokenStream source,
                                                 String field,
                                                 int phraseSlop)
                                          throws IOException

      Creates a span near (phrase) query from a graph token stream. The articulation points of the graph are visited in order and the queries created at each point are merged in the returned near query.
      Throws:
        `IOException`

    - #### newBooleanQuery

          protected BooleanQuery.Builder newBooleanQuery()

      Builds a new BooleanQuery instance.

      This is intended for subclasses that wish to customize the generated queries.

      Returns:
        new BooleanQuery instance

    - #### newSynonymQuery

          protected Query newSynonymQuery(Term[] terms)

      Builds a new SynonymQuery instance.

      This is intended for subclasses that wish to customize the generated queries.

      Returns:
        new Query instance

    - #### newGraphSynonymQuery

          protected Query newGraphSynonymQuery(Iterator<Query> queries)

      Builds a new GraphQuery for multi-terms synonyms.

      This is intended for subclasses that wish to customize the generated queries.

      Returns:
        new Query instance

    - #### newTermQuery

          protected Query newTermQuery(Term term)

      Builds a new TermQuery instance.

      This is intended for subclasses that wish to customize the generated queries.

      Parameters:
        `term` - term
      Returns:
        new TermQuery instance

    - #### newMultiPhraseQueryBuilder

          protected MultiPhraseQuery.Builder newMultiPhraseQueryBuilder()

      Builds a new MultiPhraseQuery instance.

      This is intended for subclasses that wish to customize the generated queries.

      Returns:
        new MultiPhraseQuery instance

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