MultiFieldQueryParser

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):

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

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

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

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):

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

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

Parses a query which searches on the fields specified.

If x fields are specified, this effectively constructs:

 
 (field1:query1) (field2:query2) (field3:query3)...(fieldx:queryx)
 
 

Parses a query, searching on the fields specified. Use this if you need to specify certain fields as required, and others as prohibited.

 Usage:
 
 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);
 
 

The code above would construct a query:

 
 (filename:query1) +(contents:query2) -(description:query3)
 
 

Parses a query, searching on the fields specified. Use this if you need to specify certain fields as required, and others as prohibited.

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

The code above would construct a query:

 
 (filename:query) +(contents:query) -(description:query)
 
 

Base implementation delegates to getFieldQuery(String, String). This method may be overridden, for example, to return a SpanNearQuery instead of a PhraseQuery.

Factory method for generating a query (similar to getWildcardQuery(String, String)). Called when parser parses an input term token that has the fuzzy suffix (~) appended.

Factory method for generating a query (similar to getWildcardQuery(String, String)). Called when parser parses an input term token that uses prefix notation; that is, contains a single '*' wildcard character as its last character. Since this is a special case of generic wildcard term, and such a query can be optimized easily, this usually results in a different query object.

Depending on settings, a prefix term may be lower-cased automatically. It will not go through the default Analyzer, however, since normal Analyzers are unlikely to work properly with wildcard templates.

Can be overridden by extending classes, to provide custom handling for wild card queries, which may be necessary due to missing analyzer calls.

Factory method for generating a query. Called when parser parses an input term token that contains one or more wildcard characters (? and *), but is not a prefix term token (one that has just a single * character at the end)

Depending on settings, prefix term may be lower-cased automatically. It will not go through the default Analyzer, however, since normal Analyzers are unlikely to work properly with wildcard templates.

Can be overridden by extending classes, to provide custom handling for wildcard queries, which may be necessary due to missing analyzer calls.