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From Santosh Urs <santosh...@gmail.com>
Subject Grouping of Boolean opeartors in Lucene..?
Date Wed, 12 Nov 2008 03:26:12 GMT

How can i use multiple Boolean operators in a search query.?

For example , from the search text field , i usually get the queries which
looks like

Any (word or phrase) and ( a list of URI's)
example::   rice land  http\://www.wtr.org/wordlist#c_2379
http\://www.wtr.org/wordlist#c_65748 http\://www.wtr.org/wordlist#c_7612
here the search term or phrase is = rice land
URIs are= http\://www.wtr.org/wordlist#c_2379
http\://www.wtr.org/wordlist#c_65748 http\://www.wtr.org/wordlist#c_7612

Now the way i want to build the Query is::

rice land AND ( http\://www.wtr.org/wordlist#c_2379 OR
http\://www.wtr.org/wordlist#c_65748 OR http\://www.wtr.org/wordlist#c_7612
)

i tried this-

try {
	if (queryString != null && fields != null) {
                  PerFieldAnalyzerWrapper perFieldAnalyzer =
					new PerFieldAnalyzerWrapper(analyzer);
                perFieldAnalyzer.addAnalyzer("conceptURI", new
KeywordAnalyzer());

MultiFieldQueryParser mfqp = new MultiFieldQueryParser(
						fields, perFieldAnalyzer);
if (queryString.contains("http") && !queryString.startsWith("http")) {

String orgQuery =queryString.substring(0, queryString.indexOf("http"));
					String uri=queryString.substring(queryString.indexOf("http"),
queryString.length());

uri = uri.trim();
					String[] uris = uri.split(" ");
					String tempUri="";
					for (int i = 0; i < uris.length; i++) {
						if(i== uris.length-1){
							tempUri =  tempUri + uris[i];
						}else {
							tempUri =  tempUri + uris[i]+QueryParser.OR_OPERATOR;
						}
					}

query = mfqp.parse(orgQuery+ QueryParser.AND_OPERATOR+ tempUri );



 is this is the correct way to  form a Query..?? Are there any other
methods?

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