/// <summary> Parses a query, searching on the fields specified. Use this if you need
 /// to specify certain fields as required, and others as prohibited.
 /// <p/>
 /// Usage:
 /// <code>
 /// String[] query = {&quot;query1&quot;, &quot;query2&quot;, &quot;query3&quot;};
 /// String[] fields = {&quot;filename&quot;, &quot;contents&quot;, &quot;description&quot;};
 /// BooleanClause.Occur[] flags = {BooleanClause.Occur.SHOULD,
 /// BooleanClause.Occur.MUST,
 /// BooleanClause.Occur.MUST_NOT};
 /// MultiFieldQueryParser.parse(query, fields, flags, analyzer);
 /// </code>
 /// <p/>
 /// The code above would construct a query:
 /// 
 /// <code>
 /// (filename:query1) +(contents:query2) -(description:query3)
 /// </code>
 /// 
 /// </summary>
 /// <param name="matchVersion">Lucene version to match; this is passed through to
 /// QueryParser.
 /// </param>
 /// <param name="queries">Queries string to parse
 /// </param>
 /// <param name="fields">Fields to search on
 /// </param>
 /// <param name="flags">Flags describing the fields
 /// </param>
 /// <param name="analyzer">Analyzer to use
 /// </param>
 /// <throws>  ParseException </throws>
 /// <summary>             if query parsing fails
 /// </summary>
 /// <throws>  IllegalArgumentException </throws>
 /// <summary>             if the length of the queries, fields, and flags array differ
 /// </summary>
 public static Query Parse(Version matchVersion, System.String[] queries, System.String[] fields, Occur[] flags, Analyzer analyzer)
 {
     if (!(queries.Length == fields.Length && queries.Length == flags.Length))
         throw new System.ArgumentException("queries, fields, and flags array have have different length");
     BooleanQuery bQuery = new BooleanQuery();
     for (int i = 0; i < fields.Length; i++)
     {
         QueryParser qp = new QueryParser(matchVersion, fields[i], analyzer);
         Query q = qp.Parse(queries[i]);
         if (q != null && (!(q is BooleanQuery) || ((BooleanQuery)q).GetClauses().Length > 0))
         {
             bQuery.Add(q, flags[i]);
         }
     }
     return bQuery;
 }
Exemple #2
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 public static void Main(String[] args)
 {
     if (args.Length == 0)
     {
         Console.WriteLine("Usage: java org.apache.lucene.queryParser.QueryParser <input>");
         Environment.Exit(0);
     }
     QueryParser qp = new QueryParser(Version.LUCENE_CURRENT, "field", new SimpleAnalyzer());
     Query q = qp.Parse(args[0]);
     Console.WriteLine(q.ToString("field"));
 }