Package org.cyclos.impl.sql.postgresql.fulltext

Class FullTextQueryHelper

java.lang.Object

org.cyclos.impl.sql.postgresql.fulltext.FullTextQueryHelper

public class FullTextQueryHelper
extends Object

Contains helper methods to handle full text query strings

Constructor Summary

Constructors

Constructor	Description
FullTextQueryHelper()

Method Summary

Modifier and Type	Method	Description
static FullTextQuery	parse(String queryString, boolean phraseSupported)	Parses the given query string.
static FullTextQuery	parsePlain(String queryString)	Parses the given query string in a plain way, that means: The query string is split in white spaces.

Methods inherited from class java.lang.Object

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

Constructor Detail

FullTextQueryHelper

public FullTextQueryHelper()

Method Detail

parse

public static FullTextQuery parse(String queryString,
                                  boolean phraseSupported)
                           throws QueryParseException

Parses the given query string. The accepted format is:

• term1 term2: Matches either term1 or term2
• term1 +term2: Matches both term1 and term2
• term1 -term2: Matches term1 and not term2
• "term1 term2": Matches term1 term2 in the exact sequence (only if phraseSupported is true, otherwise is the same as term1 +term2)
• term*: Matches any term which starts with the given prefix
• Also, parenthesis can be used, like: (term1 term2) -"term3 term4"

Throws:

QueryParseException

parsePlain

public static FullTextQuery parsePlain(String queryString)
                                throws QueryParseException

Parses the given query string in a plain way, that means:

• The query string is split in white spaces. Any of these characters are ignored: *()
• For each part:
  • If it contains punctuation, it is matched in the exact sequence, as if that part were quoted, for example, user@mail.com matches "user@mail.com".
  • Otherwise, the part is matched as prefix, for example, user matches user*. Leading asterisks are ignored.

Throws:

QueryParseException