Class MultiFieldQueryParserWrapper


  • @Deprecated
    public class MultiFieldQueryParserWrapper
    extends QueryParserWrapper
    Deprecated.
    this class will be removed soon, it's a temporary class to be used along the transition from the old query parser to the new one
    This class behaves as the as the lucene 2.4 MultiFieldQueryParser class, but uses the new query parser interface instead of the old one.

    This class should be used when the new query parser features are needed and also keep at the same time the old query parser interface.
    • Constructor Detail

      • MultiFieldQueryParserWrapper

        public MultiFieldQueryParserWrapper​(String[] fields,
                                            Analyzer analyzer,
                                            Map<String,​Float> boosts)
        Deprecated.
        Creates a MultiFieldQueryParser. Allows passing of a map with term to Boost, and the boost to apply to each term.

        It will, when parse(String query) is called, construct a query like this (assuming the query consists of two terms and you specify the two fields title and body):

        (title:term1 body:term1) (title:term2 body:term2)

        When setDefaultOperator(AND_OPERATOR) is set, the result will be:

        +(title:term1 body:term1) +(title:term2 body:term2)

        When you pass a boost (title=>5 body=>10) you can get

        +(title:term1^5.0 body:term1^10.0) +(title:term2^5.0 body:term2^10.0)

        In other words, all the query's terms must appear, but it doesn't matter in what fields they appear.

      • MultiFieldQueryParserWrapper

        public MultiFieldQueryParserWrapper​(String[] fields,
                                            Analyzer analyzer)
        Deprecated.
        Creates a MultiFieldQueryParser.

        It will, when parse(String query) is called, construct a query like this (assuming the query consists of two terms and you specify the two fields title and body):

        (title:term1 body:term1) (title:term2 body:term2)

        When setDefaultOperator(AND_OPERATOR) is set, the result will be:

        +(title:term1 body:term1) +(title:term2 body:term2)

        In other words, all the query's terms must appear, but it doesn't matter in what fields they appear.

    • Method Detail

      • parse

        public static Query parse​(String[] queries,
                                  String[] fields,
                                  Analyzer analyzer)
                           throws ParseException
        Deprecated.
        Parses a query which searches on the fields specified.

        If x fields are specified, this effectively constructs:

         <code>
         (field1:query1) (field2:query2) (field3:query3)...(fieldx:queryx)
         </code>
         
        Parameters:
        queries - Queries strings to parse
        fields - Fields to search on
        analyzer - Analyzer to use
        Throws:
        ParseException - if query parsing fails
        IllegalArgumentException - if the length of the queries array differs from the length of the fields array
      • parse

        public static Query parse​(String query,
                                  String[] fields,
                                  BooleanClause.Occur[] flags,
                                  Analyzer analyzer)
                           throws ParseException
        Deprecated.
        Parses a query, searching on the fields specified. Use this if you need to specify certain fields as required, and others as prohibited.

         Usage:
         <code>
         String[] fields = {"filename", "contents", "description"};
         BooleanClause.Occur[] flags = {BooleanClause.Occur.SHOULD,
                        BooleanClause.Occur.MUST,
                        BooleanClause.Occur.MUST_NOT};
         MultiFieldQueryParser.parse("query", fields, flags, analyzer);
         </code>
         

        The code above would construct a query:

         <code>
         (filename:query) +(contents:query) -(description:query)
         </code>
         
        Parameters:
        query - Query string to parse
        fields - Fields to search on
        flags - Flags describing the fields
        analyzer - Analyzer to use
        Throws:
        ParseException - if query parsing fails
        IllegalArgumentException - if the length of the fields array differs from the length of the flags array
      • parse

        public static Query parse​(String[] queries,
                                  String[] fields,
                                  BooleanClause.Occur[] flags,
                                  Analyzer analyzer)
                           throws ParseException
        Deprecated.
        Parses a query, searching on the fields specified. Use this if you need to specify certain fields as required, and others as prohibited.

         Usage:
         <code>
         String[] query = {"query1", "query2", "query3"};
         String[] fields = {"filename", "contents", "description"};
         BooleanClause.Occur[] flags = {BooleanClause.Occur.SHOULD,
                        BooleanClause.Occur.MUST,
                        BooleanClause.Occur.MUST_NOT};
         MultiFieldQueryParser.parse(query, fields, flags, analyzer);
         </code>
         

        The code above would construct a query:

         <code>
         (filename:query1) +(contents:query2) -(description:query3)
         </code>
         
        Parameters:
        queries - Queries string to parse
        fields - Fields to search on
        flags - Flags describing the fields
        analyzer - Analyzer to use
        Throws:
        ParseException - if query parsing fails
        IllegalArgumentException - if the length of the queries, fields, and flags array differ