Lucene.Net.Search.MultiPhraseQuery.ToString C# (CSharp) Метод

		public override System.String ToString(System.String f)
		{
			System.Text.StringBuilder buffer = new System.Text.StringBuilder();
			if (!field.Equals(f))
			{
				buffer.Append(field);
				buffer.Append(":");
			}
			
			buffer.Append("\"");
			System.Collections.Generic.IEnumerator<Term[]> i = termArrays.GetEnumerator();
            bool first = true;
			while (i.MoveNext())
			{
                if (first)
                {
                    first = false;
                }
                else
                {
                    buffer.Append(" ");
                }

				Term[] terms = i.Current;
				if (terms.Length > 1)
				{
					buffer.Append("(");
					for (int j = 0; j < terms.Length; j++)
					{
						buffer.Append(terms[j].Text);
						if (j < terms.Length - 1)
							buffer.Append(" ");
					}
					buffer.Append(")");
				}
				else
				{
					buffer.Append(terms[0].Text);
				}
			}
			buffer.Append("\"");
			
			if (slop != 0)
			{
				buffer.Append("~");
				buffer.Append(slop);
			}
			
			buffer.Append(ToStringUtils.Boost(Boost));
			
			return buffer.ToString();
		}
		

		public virtual void  TestPhrasePrefix()
		{
			RAMDirectory indexStore = new RAMDirectory();
			IndexWriter writer = new IndexWriter(indexStore, new SimpleAnalyzer(), true, IndexWriter.MaxFieldLength.LIMITED);
			Add("blueberry pie", writer);
			Add("blueberry strudel", writer);
			Add("blueberry pizza", writer);
			Add("blueberry chewing gum", writer);
			Add("bluebird pizza", writer);
			Add("bluebird foobar pizza", writer);
			Add("piccadilly circus", writer);
			writer.Optimize();
			writer.Close();
			
			IndexSearcher searcher = new IndexSearcher(indexStore);
			
			// search for "blueberry pi*":
			MultiPhraseQuery query1 = new MultiPhraseQuery();
			// search for "strawberry pi*":
			MultiPhraseQuery query2 = new MultiPhraseQuery();
			query1.Add(new Term("body", "blueberry"));
			query2.Add(new Term("body", "strawberry"));
			
			System.Collections.ArrayList termsWithPrefix = new System.Collections.ArrayList();
			IndexReader ir = IndexReader.Open(indexStore);
			
			// this TermEnum gives "piccadilly", "pie" and "pizza".
			System.String prefix = "pi";
			TermEnum te = ir.Terms(new Term("body", prefix));
			do 
			{
				if (te.Term().Text().StartsWith(prefix))
				{
					termsWithPrefix.Add(te.Term());
				}
			}
			while (te.Next());
			
			query1.Add((Term[]) termsWithPrefix.ToArray(typeof(Term)));
			Assert.AreEqual("body:\"blueberry (piccadilly pie pizza)\"", query1.ToString());
			query2.Add((Term[]) termsWithPrefix.ToArray(typeof(Term)));
			Assert.AreEqual("body:\"strawberry (piccadilly pie pizza)\"", query2.ToString());
			
			ScoreDoc[] result;
			result = searcher.Search(query1, null, 1000).scoreDocs;
			Assert.AreEqual(2, result.Length);
			result = searcher.Search(query2, null, 1000).scoreDocs;
			Assert.AreEqual(0, result.Length);
			
			// search for "blue* pizza":
			MultiPhraseQuery query3 = new MultiPhraseQuery();
			termsWithPrefix.Clear();
			prefix = "blue";
			te = ir.Terms(new Term("body", prefix));
			do 
			{
				if (te.Term().Text().StartsWith(prefix))
				{
					termsWithPrefix.Add(te.Term());
				}
			}
			while (te.Next());
			query3.Add((Term[]) termsWithPrefix.ToArray(typeof(Term)));
			query3.Add(new Term("body", "pizza"));
			
			result = searcher.Search(query3, null, 1000).scoreDocs;
			Assert.AreEqual(2, result.Length); // blueberry pizza, bluebird pizza
			Assert.AreEqual("body:\"(blueberry bluebird) pizza\"", query3.ToString());
			
			// test slop:
			query3.SetSlop(1);
			result = searcher.Search(query3, null, 1000).scoreDocs;
			Assert.AreEqual(3, result.Length); // blueberry pizza, bluebird pizza, bluebird foobar pizza
			
			MultiPhraseQuery query4 = new MultiPhraseQuery();
			try
			{
				query4.Add(new Term("field1", "foo"));
				query4.Add(new Term("field2", "foobar"));
				Assert.Fail();
			}
			catch (System.ArgumentException e)
			{
				// okay, all terms must belong to the same field
			}
			
			searcher.Close();
			indexStore.Close();
		}