C# (CSharp) Mono.Lucene.Net.Search.BooleanQuery примеры использования

Пример #1

Файл: MultiFieldQueryParser.cs Проект: vernon016/mono

        /// <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/>
        ///
        /// <pre>
        /// Usage:
        /// &lt;code&gt;
        /// 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);
        /// &lt;/code&gt;
        /// </pre>
        /// <p/>
        /// The code above would construct a query:
        ///
        /// <pre>
        /// &lt;code&gt;
        /// (filename:query1) +(contents:query2) -(description:query3)
        /// &lt;/code&gt;
        /// </pre>
        ///
        /// </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, BooleanClause.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);
        }

Пример #2

Файл: MultiFieldQueryParser.cs Проект: carrie901/mono

		/// <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/>
		/// 
		/// <pre>
		/// Usage:
		/// &lt;code&gt;
		/// 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);
		/// &lt;/code&gt;
		/// </pre>
		/// <p/>
		/// The code above would construct a query:
		/// 
		/// <pre>
		/// &lt;code&gt;
		/// (filename:query1) +(contents:query2) -(description:query3)
		/// &lt;/code&gt;
		/// </pre>
		/// 
		/// </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, BooleanClause.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;
		}