/// <summary>
/// 根据多个关键字添加PhraseQuery
/// </summary>
/// <param name="fieldName">待搜索的字段名称</param>
/// <param name="phrases">待搜索的短语列表</param>
/// <param name="boostLevel">权重级别</param>
/// <param name="asFilter">是否作为过滤条件</param>
/// <returns>LuceneSearchBuilder</returns>
public LuceneSearchBuilder WithPhrases(string fieldName, IEnumerable <string> phrases, BoostLevel?boostLevel = null, bool asFilter = false)
{
BooleanQuery query = new BooleanQuery();
foreach (string phrase in phrases)
{
string filteredPhrase = ClauseScrubber.LuceneKeywordsScrub(phrase);
if (string.IsNullOrEmpty(filteredPhrase))
{
continue;
}
if (filteredPhrase.Length == 1)
{
Term term = new Term(fieldName, filteredPhrase);
Query q = new PrefixQuery(term);
if (boostLevel.HasValue)
{
SetBoost(q, boostLevel.Value);
}
query.Add(q, BooleanClause.Occur.SHOULD);
continue;
}
string[] nameSegments = ClauseScrubber.SegmentForPhraseQuery(filteredPhrase);
PhraseQuery phraseQuery = new PhraseQuery();
foreach (var nameSegment in nameSegments)
{
phraseQuery.Add(new Term(fieldName, nameSegment));
}
phraseQuery.SetSlop(PhraseQuerySlop);
if (boostLevel.HasValue)
{
SetBoost(phraseQuery, boostLevel.Value);
}
query.Add(phraseQuery, BooleanClause.Occur.SHOULD);
}
if (asFilter)
{
filters.Add(new BooleanClause(query, BooleanClause.Occur.MUST));
}
else
{
clauses.Add(new BooleanClause(query, BooleanClause.Occur.MUST));
}
return(this);
}
/// <summary>
/// 批量添加PhraseQuery
/// </summary>
/// <param name="phrase">待搜索的短语</param>
/// <param name="fieldNameAndBoosts">字段名称及权重集合</param>
/// <param name="occur">搜索条件间的关系</param>
/// <param name="asFilter">是否作为过滤器条件</param>
/// <returns></returns>
public LuceneSearchBuilder WithPhrases(Dictionary <string, BoostLevel> fieldNameAndBoosts, string phrase, BooleanClause.Occur occur, bool asFilter = false)
{
string filteredPhrase = ClauseScrubber.LuceneKeywordsScrub(phrase);
if (string.IsNullOrEmpty(filteredPhrase))
{
return(this);
}
string[] nameSegments = ClauseScrubber.SegmentForPhraseQuery(filteredPhrase);
if (nameSegments.Length == 1)
{
return(WithFields(fieldNameAndBoosts, nameSegments[0], false, occur, asFilter));
}
else
{
BooleanQuery query = new BooleanQuery();
foreach (var fieldNameAndBoost in fieldNameAndBoosts)
{
PhraseQuery phraseQuery = new PhraseQuery();
foreach (var nameSegment in nameSegments)
{
phraseQuery.Add(new Term(fieldNameAndBoost.Key, nameSegment));
}
phraseQuery.SetSlop(PhraseQuerySlop);
SetBoost(phraseQuery, fieldNameAndBoost.Value);
query.Add(phraseQuery, occur);
}
if (asFilter)
{
filters.Add(new BooleanClause(query, BooleanClause.Occur.MUST));
}
else
{
clauses.Add(new BooleanClause(query, BooleanClause.Occur.MUST));
}
return(this);
}
}
/// <summary>
/// 添加PhraseQuery
/// </summary>
/// <param name="fieldName">待搜索的字段名称</param>
/// <param name="phrase">待搜索的短语</param>
/// <param name="boostLevel">权重级别</param>
/// <param name="asFilter">是否作为过滤条件</param>
/// <returns>LuceneSearchBuilder</returns>
public LuceneSearchBuilder WithPhrase(string fieldName, string phrase, BoostLevel?boostLevel = null, bool asFilter = false)
{
string filteredPhrase = ClauseScrubber.LuceneKeywordsScrub(phrase);
if (string.IsNullOrEmpty(filteredPhrase))
{
return(this);
}
if (filteredPhrase.Length == 1)
{
return(WithField(fieldName, filteredPhrase, false, boostLevel, asFilter));
}
string[] nameSegments = ClauseScrubber.SegmentForPhraseQuery(filteredPhrase);
PhraseQuery phraseQuery = new PhraseQuery();
foreach (var nameSegment in nameSegments)
{
phraseQuery.Add(new Term(fieldName, nameSegment));
}
phraseQuery.SetSlop(PhraseQuerySlop);
if (boostLevel.HasValue)
{
SetBoost(phraseQuery, boostLevel.Value);
}
if (asFilter)
{
filters.Add(new BooleanClause(phraseQuery, BooleanClause.Occur.MUST));
}
else
{
clauses.Add(new BooleanClause(phraseQuery, BooleanClause.Occur.MUST));
}
return(this);
}