public virtual void TestPhrasePrefix()
{
RAMDirectory indexStore = new RAMDirectory();
IndexWriter writer = new IndexWriter(indexStore, new SimpleAnalyzer(), true);
Document doc1 = new Document();
Document doc2 = new Document();
Document doc3 = new Document();
Document doc4 = new Document();
Document doc5 = new Document();
doc1.Add(Field.Text("body", "blueberry pie"));
doc2.Add(Field.Text("body", "blueberry strudel"));
doc3.Add(Field.Text("body", "blueberry pizza"));
doc4.Add(Field.Text("body", "blueberry chewing gum"));
doc5.Add(Field.Text("body", "piccadilly circus"));
writer.AddDocument(doc1);
writer.AddDocument(doc2);
writer.AddDocument(doc3);
writer.AddDocument(doc4);
writer.AddDocument(doc5);
writer.Optimize();
writer.Close();
IndexSearcher searcher = new IndexSearcher(indexStore);
PhrasePrefixQuery query1 = new PhrasePrefixQuery();
PhrasePrefixQuery query2 = new PhrasePrefixQuery();
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)));
query2.Add((Term[])termsWithPrefix.ToArray(typeof(Term)));
Hits result;
result = searcher.Search(query1);
Assert.AreEqual(2, result.Length());
result = searcher.Search(query2);
Assert.AreEqual(0, result.Length());
}
public virtual void TestPhrasePrefix()
{
RAMDirectory indexStore = new RAMDirectory();
IndexWriter writer = new IndexWriter(indexStore, new SimpleAnalyzer(), true);
Document doc1 = new Document();
Document doc2 = new Document();
Document doc3 = new Document();
Document doc4 = new Document();
Document doc5 = new Document();
doc1.Add(Field.Text("body", "blueberry pie"));
doc2.Add(Field.Text("body", "blueberry strudel"));
doc3.Add(Field.Text("body", "blueberry pizza"));
doc4.Add(Field.Text("body", "blueberry chewing gum"));
doc5.Add(Field.Text("body", "piccadilly circus"));
writer.AddDocument(doc1);
writer.AddDocument(doc2);
writer.AddDocument(doc3);
writer.AddDocument(doc4);
writer.AddDocument(doc5);
writer.Optimize();
writer.Close();
IndexSearcher searcher = new IndexSearcher(indexStore);
PhrasePrefixQuery query1 = new PhrasePrefixQuery();
PhrasePrefixQuery query2 = new PhrasePrefixQuery();
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)));
query2.Add((Term[]) termsWithPrefix.ToArray(typeof(Term)));
Hits result;
result = searcher.Search(query1);
Assert.AreEqual(2, result.Length());
result = searcher.Search(query2);
Assert.AreEqual(0, result.Length());
}
public PhrasePrefixWeight(PhrasePrefixQuery enclosingInstance, Searcher searcher)
{
InitBlock(enclosingInstance);
this.similarity = Enclosing_Instance.GetSimilarity(searcher);
// compute idf
System.Collections.IEnumerator i = Enclosing_Instance.termArrays.GetEnumerator();
while (i.MoveNext())
{
Term[] terms = (Term[])i.Current;
for (int j = 0; j < terms.Length; j++)
{
idf += Enclosing_Instance.GetSimilarity(searcher).Idf(terms[j], searcher);
}
}
}
public PhrasePrefixWeight(PhrasePrefixQuery enclosingInstance, Searcher searcher)
{
InitBlock(enclosingInstance);
this.similarity = Enclosing_Instance.GetSimilarity(searcher);
// compute idf
System.Collections.IEnumerator i = Enclosing_Instance.termArrays.GetEnumerator();
while (i.MoveNext())
{
Term[] terms = (Term[]) i.Current;
for (int j = 0; j < terms.Length; j++)
{
idf += Enclosing_Instance.GetSimilarity(searcher).Idf(terms[j], searcher);
}
}
}
private void InitBlock(PhrasePrefixQuery enclosingInstance)
{
this.enclosingInstance = enclosingInstance;
}
private void InitBlock(PhrasePrefixQuery enclosingInstance)
{
this.enclosingInstance = enclosingInstance;
}
