public override DocIdSet GetDocIdSet(Lucene.Net.Index.IndexReader reader)
{
//创建一个Bit，默认里面所有元素都是0
OpenBitSet openBitSet = new OpenBitSet(reader.MaxDoc);//获取最大文档最大编号
FilterInfo filterInfo = FilterDict.FilterInfo(this._language);
if (filterInfo.Enabled)
{
this.SetOrClear(reader, openBitSet, filterInfo.SetOrClear);
}
else
{//先把元素填满，都是1。
openBitSet.Set(0L, reader.MaxDoc);
}
return(openBitSet);
}
/// <summary>
/// 执行自定义过滤条件
/// </summary>
/// <param name="reader"></param>
/// <param name="openBitSet"></param>
/// <param name="setOrClear">Set Or Clear</param>
private void SetOrClear(IndexReader reader, OpenBitSet openBitSet, bool setOrClear)
{
if (!setOrClear)
{//如果是清除操作，先把所有元素填满，都是1。
openBitSet.Set(0L, reader.MaxDoc);
}
FilterInfo filterInfo = FilterDict.FilterInfo(this._language);
string[] values = filterInfo.Values;
if (values != null)
{
TermDocs termDocs = null;
foreach (string value in values)
{
if (filterInfo.FieldType == FieldType.DATETIME)
{
long ticks = DateTime.Parse(value).Ticks;
termDocs = reader.TermDocs(new Term(filterInfo.FieldName, ticks.ToString()));
}
else
{
termDocs = reader.TermDocs(new Term(filterInfo.FieldName, value));
}
int count = termDocs.Read(_doc, _freqs);
if (count == 1)
{
if (setOrClear)
{ //显示
openBitSet.Set(_doc[0]); //将Document的Doc文档表示设置为1。
}
else
{ //不显示
openBitSet.Clear(_doc[0]); //将Document的Doc文档表示设置为0。
}
}
}
}
}
