/// <summary> Constructs a filter for field <code>f</code> matching
/// dates on or before before <code>date</code>.
/// </summary>
public static DateFilter Before(System.String field, System.DateTime date)
{
DateFilter result = new DateFilter(field);
result.end = DateField.DateToString(date);
return result;
}
/// <summary> Constructs a filter for field <code>f</code> matching times
/// on or before <code>time</code>.
/// </summary>
public static DateFilter Before(System.String field, long time)
{
DateFilter result = new DateFilter(field);
result.end = DateField.TimeToString(time);
return(result);
}
/// <summary> Constructs a filter for field <code>f</code> matching
/// dates on or before before <code>date</code>.
/// </summary>
public static DateFilter Before(System.String field, System.DateTime date)
{
DateFilter result = new DateFilter(field);
result.end = DateField.DateToString(date);
return(result);
}
/// <summary> Constructs a filter for field <code>f</code> matching
/// times on or after <code>time</code>.
/// </summary>
public static DateFilter After(System.String field, long time)
{
DateFilter result = new DateFilter(field);
result.start = DateField.TimeToString(time);
return(result);
}
/// <summary> Constructs a filter for field <code>f</code> matching
/// dates on or after <code>date</code>.
/// </summary>
public static DateFilter After(System.String field, System.DateTime date)
{
DateFilter result = new DateFilter(field);
result.start = DateField.DateToString(date);
return(result);
}
public virtual void TestAfter()
{
// create an index
RAMDirectory indexStore = new RAMDirectory();
IndexWriter writer = new IndexWriter(indexStore, new SimpleAnalyzer(), true);
long now = (System.DateTime.Now.Ticks - 621355968000000000) / 10000;
Document doc = new Document();
// add time that is in the future
doc.Add(Field.Keyword("datefield", DateField.TimeToString(now + 888888)));
doc.Add(Field.Text("body", "Today is a very sunny day in New York City"));
writer.AddDocument(doc);
writer.Optimize();
writer.Close();
IndexSearcher searcher = new IndexSearcher(indexStore);
// filter that should preserve matches
DateFilter df1 = DateFilter.After("datefield", now);
// filter that should discard matches
DateFilter df2 = DateFilter.After("datefield", now + 999999);
// search something that doesn't exist with DateFilter
Query query1 = new TermQuery(new Term("body", "NoMatchForThis"));
// search for something that does exists
Query query2 = new TermQuery(new Term("body", "sunny"));
Hits result;
// ensure that queries return expected results without DateFilter first
result = searcher.Search(query1);
Assert.AreEqual(0, result.Length());
result = searcher.Search(query2);
Assert.AreEqual(1, result.Length());
// run queries with DateFilter
result = searcher.Search(query1, df1);
Assert.AreEqual(0, result.Length());
result = searcher.Search(query1, df2);
Assert.AreEqual(0, result.Length());
result = searcher.Search(query2, df1);
Assert.AreEqual(1, result.Length());
result = searcher.Search(query2, df2);
Assert.AreEqual(0, result.Length());
}
/// <summary> Constructs a filter for field <code>f</code> matching
/// dates on or after <code>date</code>.
/// </summary>
public static DateFilter After(System.String field, System.DateTime date)
{
DateFilter result = new DateFilter(field);
result.start = DateField.DateToString(date);
return result;
}
/// <summary> Constructs a filter for field <code>f</code> matching times
/// on or before <code>time</code>.
/// </summary>
public static DateFilter Before(System.String field, long time)
{
DateFilter result = new DateFilter(field);
result.end = DateField.TimeToString(time);
return result;
}
/// <summary> Constructs a filter for field <code>f</code> matching
/// times on or after <code>time</code>.
/// </summary>
public static DateFilter After(System.String field, long time)
{
DateFilter result = new DateFilter(field);
result.start = DateField.TimeToString(time);
return result;
}