Example #1
0
        public virtual void TestRewrite()
        {
            // bi-gram test ABC => AB/BC => AB/BC
            PhraseQuery pq1 = new NGramPhraseQuery(2);

            pq1.Add(new Term("f", "AB"));
            pq1.Add(new Term("f", "BC"));

            Query q = pq1.Rewrite(Reader);

            Assert.IsTrue(q is NGramPhraseQuery);
            Assert.AreSame(pq1, q);
            pq1 = (NGramPhraseQuery)q;
            Assert.AreEqual(new Term[] { new Term("f", "AB"), new Term("f", "BC") }, pq1.Terms);
            Assert.AreEqual(new int[] { 0, 1 }, pq1.Positions);

            // bi-gram test ABCD => AB/BC/CD => AB//CD
            PhraseQuery pq2 = new NGramPhraseQuery(2);

            pq2.Add(new Term("f", "AB"));
            pq2.Add(new Term("f", "BC"));
            pq2.Add(new Term("f", "CD"));

            q = pq2.Rewrite(Reader);
            Assert.IsTrue(q is PhraseQuery);
            Assert.AreNotSame(pq2, q);
            pq2 = (PhraseQuery)q;
            Assert.AreEqual(new Term[] { new Term("f", "AB"), new Term("f", "CD") }, pq2.Terms);
            Assert.AreEqual(new int[] { 0, 2 }, pq2.Positions);

            // tri-gram test ABCDEFGH => ABC/BCD/CDE/DEF/EFG/FGH => ABC///DEF//FGH
            PhraseQuery pq3 = new NGramPhraseQuery(3);

            pq3.Add(new Term("f", "ABC"));
            pq3.Add(new Term("f", "BCD"));
            pq3.Add(new Term("f", "CDE"));
            pq3.Add(new Term("f", "DEF"));
            pq3.Add(new Term("f", "EFG"));
            pq3.Add(new Term("f", "FGH"));

            q = pq3.Rewrite(Reader);
            Assert.IsTrue(q is PhraseQuery);
            Assert.AreNotSame(pq3, q);
            pq3 = (PhraseQuery)q;
            Assert.AreEqual(new Term[] { new Term("f", "ABC"), new Term("f", "DEF"), new Term("f", "FGH") }, pq3.Terms);
            Assert.AreEqual(new int[] { 0, 3, 5 }, pq3.Positions);

            // LUCENE-4970: boosting test
            PhraseQuery pq4 = new NGramPhraseQuery(2);

            pq4.Add(new Term("f", "AB"));
            pq4.Add(new Term("f", "BC"));
            pq4.Add(new Term("f", "CD"));
            pq4.Boost = 100.0F;

            q = pq4.Rewrite(Reader);
            Assert.AreNotSame(pq4, q);
            Assert.AreEqual(pq4.Boost, q.Boost, 0.1f);
        }
        public virtual void TestRewrite()
        {
            // bi-gram test ABC => AB/BC => AB/BC
            PhraseQuery pq1 = new NGramPhraseQuery(2);
            pq1.Add(new Term("f", "AB"));
            pq1.Add(new Term("f", "BC"));

            Query q = pq1.Rewrite(Reader);
            Assert.IsTrue(q is NGramPhraseQuery);
            Assert.AreSame(pq1, q);
            pq1 = (NGramPhraseQuery)q;
            Assert.AreEqual(new Term[] { new Term("f", "AB"), new Term("f", "BC") }, pq1.Terms);
            Assert.AreEqual(new int[] { 0, 1 }, pq1.Positions);

            // bi-gram test ABCD => AB/BC/CD => AB//CD
            PhraseQuery pq2 = new NGramPhraseQuery(2);
            pq2.Add(new Term("f", "AB"));
            pq2.Add(new Term("f", "BC"));
            pq2.Add(new Term("f", "CD"));

            q = pq2.Rewrite(Reader);
            Assert.IsTrue(q is PhraseQuery);
            Assert.AreNotSame(pq2, q);
            pq2 = (PhraseQuery)q;
            Assert.AreEqual(new Term[] { new Term("f", "AB"), new Term("f", "CD") }, pq2.Terms);
            Assert.AreEqual(new int[] { 0, 2 }, pq2.Positions);

            // tri-gram test ABCDEFGH => ABC/BCD/CDE/DEF/EFG/FGH => ABC///DEF//FGH
            PhraseQuery pq3 = new NGramPhraseQuery(3);
            pq3.Add(new Term("f", "ABC"));
            pq3.Add(new Term("f", "BCD"));
            pq3.Add(new Term("f", "CDE"));
            pq3.Add(new Term("f", "DEF"));
            pq3.Add(new Term("f", "EFG"));
            pq3.Add(new Term("f", "FGH"));

            q = pq3.Rewrite(Reader);
            Assert.IsTrue(q is PhraseQuery);
            Assert.AreNotSame(pq3, q);
            pq3 = (PhraseQuery)q;
            Assert.AreEqual(new Term[] { new Term("f", "ABC"), new Term("f", "DEF"), new Term("f", "FGH") }, pq3.Terms);
            Assert.AreEqual(new int[] { 0, 3, 5 }, pq3.Positions);

            // LUCENE-4970: boosting test
            PhraseQuery pq4 = new NGramPhraseQuery(2);
            pq4.Add(new Term("f", "AB"));
            pq4.Add(new Term("f", "BC"));
            pq4.Add(new Term("f", "CD"));
            pq4.Boost = 100.0F;

            q = pq4.Rewrite(Reader);
            Assert.AreNotSame(pq4, q);
            Assert.AreEqual(pq4.Boost, q.Boost, 0.1f);
        }
Example #3
0
        /// <summary>
        /// Returns <c>true</c> if <paramref name="o"/> is equal to this. </summary>
        public override bool Equals(object o)
        {
            if (!(o is NGramPhraseQuery))
            {
                return(false);
            }
            NGramPhraseQuery other = (NGramPhraseQuery)o;

            if (this.n != other.n)
            {
                return(false);
            }
            return(base.Equals(other));
        }