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);
}
/// <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));
}
