private static Lucene.Net.Search.Query HandleEndsWith(Query query, MethodExpression expression, QueryMetadata metadata, BlittableJsonReaderObject parameters)
{
var fieldName = ExtractIndexFieldName(query, parameters, expression.Arguments[0], metadata);
var(value, valueType) = GetValue(fieldName, query, metadata, parameters, (ValueExpression)expression.Arguments[1]);
if (valueType != ValueTokenType.String)
{
ThrowMethodExpectsArgumentOfTheFollowingType("endsWith", ValueTokenType.String, valueType, metadata.QueryText, parameters);
}
var valueAsString = GetValueAsString(value);
valueAsString = string.IsNullOrEmpty(valueAsString)
? LuceneQueryHelper.Asterisk
: valueAsString.Insert(0, LuceneQueryHelper.Asterisk);
return(LuceneQueryHelper.Term(fieldName, valueAsString, LuceneTermType.WildCard));
}
private static Lucene.Net.Search.Query HandleSearch(Query query, MethodExpression expression, QueryMetadata metadata, BlittableJsonReaderObject parameters,
Analyzer analyzer)
{
QueryFieldName fieldName;
if (expression.Arguments[0] is FieldExpression ft)
{
fieldName = ExtractIndexFieldName(query, parameters, ft, metadata);
}
else if (expression.Arguments[0] is ValueExpression vt)
{
fieldName = ExtractIndexFieldName(vt, metadata, parameters);
}
else
{
throw new InvalidOperationException("search() method can only be called with an identifier or string, but was called with " + expression.Arguments[0]);
}
var(value, valueType) = GetValue(fieldName, query, metadata, parameters, (ValueExpression)expression.Arguments[1]);
if (valueType != ValueTokenType.String)
{
ThrowMethodExpectsArgumentOfTheFollowingType("search", ValueTokenType.String, valueType, metadata.QueryText, parameters);
}
Debug.Assert(metadata.IsDynamic == false || metadata.WhereFields[fieldName].IsFullTextSearch);
var valueAsString = GetValueAsString(value);
var values = valueAsString.Split(' ');
if (metadata.IsDynamic)
{
fieldName = new QueryFieldName(AutoIndexField.GetSearchAutoIndexFieldName(fieldName.Value), fieldName.IsQuoted);
}
if (values.Length == 1)
{
var nValue = values[0];
return(LuceneQueryHelper.AnalyzedTerm(fieldName, nValue, GetTermType(nValue), analyzer));
}
var occur = Occur.SHOULD;
if (expression.Arguments.Count == 3)
{
var fieldExpression = (FieldExpression)expression.Arguments[2];
if (fieldExpression.Compound.Count != 1)
{
ThrowInvalidOperatorInSearch(metadata, parameters, fieldExpression);
}
var op = fieldExpression.Compound[0];
if (string.Equals("AND", op, StringComparison.OrdinalIgnoreCase))
{
occur = Occur.MUST;
}
else if (string.Equals("OR", op, StringComparison.OrdinalIgnoreCase))
{
occur = Occur.SHOULD;
}
else
{
ThrowInvalidOperatorInSearch(metadata, parameters, fieldExpression);
}
}
var q = new BooleanQuery();
foreach (var v in values)
{
q.Add(LuceneQueryHelper.AnalyzedTerm(fieldName, v, GetTermType(v), analyzer), occur);
}
return(q);
LuceneTermType GetTermType(string termValue)
{
if (string.IsNullOrEmpty(termValue))
{
return(LuceneTermType.String);
}
if (termValue[0] == LuceneQueryHelper.AsteriskChar)
{
return(LuceneTermType.WildCard);
}
if (termValue[termValue.Length - 1] == LuceneQueryHelper.AsteriskChar)
{
if (termValue[termValue.Length - 2] != '\\')
{
return(LuceneTermType.Prefix);
}
}
return(LuceneTermType.String);
}
}
private static Lucene.Net.Search.Query HandleExists(Query query, BlittableJsonReaderObject parameters, MethodExpression expression, QueryMetadata metadata)
{
var fieldName = ExtractIndexFieldName(query, parameters, expression.Arguments[0], metadata);
return(LuceneQueryHelper.Term(fieldName, LuceneQueryHelper.Asterisk, LuceneTermType.WildCard));
}
private static Lucene.Net.Search.Query ToLuceneQuery(JsonOperationContext context, Query query, QueryExpression expression, QueryMetadata metadata,
BlittableJsonReaderObject parameters, Analyzer analyzer, Func <string, SpatialField> getSpatialField, bool exact = false)
{
if (expression == null)
{
return(new MatchAllDocsQuery());
}
if (expression is BinaryExpression where)
{
switch (where.Operator)
{
case OperatorType.Equal:
case OperatorType.NotEqual:
case OperatorType.GreaterThan:
case OperatorType.LessThan:
case OperatorType.LessThanEqual:
case OperatorType.GreaterThanEqual:
{
var fieldName = ExtractIndexFieldName(query, parameters, where.Left, metadata);
var(value, valueType) = GetValue(fieldName, query, metadata, parameters, where.Right);
var(luceneFieldName, fieldType, termType) = GetLuceneField(fieldName, valueType);
switch (fieldType)
{
case LuceneFieldType.String:
var valueAsString = GetValueAsString(value);
if (exact && metadata.IsDynamic)
{
luceneFieldName = AutoIndexField.GetExactAutoIndexFieldName(luceneFieldName);
}
switch (where.Operator)
{
case OperatorType.Equal:
return(LuceneQueryHelper.Equal(luceneFieldName, termType, valueAsString, exact));
case OperatorType.NotEqual:
return(LuceneQueryHelper.NotEqual(luceneFieldName, termType, valueAsString, exact));
case OperatorType.LessThan:
return(LuceneQueryHelper.LessThan(luceneFieldName, termType, valueAsString, exact));
case OperatorType.GreaterThan:
return(LuceneQueryHelper.GreaterThan(luceneFieldName, termType, valueAsString, exact));
case OperatorType.LessThanEqual:
return(LuceneQueryHelper.LessThanOrEqual(luceneFieldName, termType, valueAsString, exact));
case OperatorType.GreaterThanEqual:
return(LuceneQueryHelper.GreaterThanOrEqual(luceneFieldName, termType, valueAsString, exact));
}
break;
case LuceneFieldType.Long:
var valueAsLong = (long)value;
switch (where.Operator)
{
case OperatorType.Equal:
return(LuceneQueryHelper.Equal(luceneFieldName, termType, valueAsLong));
case OperatorType.NotEqual:
return(LuceneQueryHelper.NotEqual(luceneFieldName, termType, valueAsLong));
case OperatorType.LessThan:
return(LuceneQueryHelper.LessThan(luceneFieldName, termType, valueAsLong));
case OperatorType.GreaterThan:
return(LuceneQueryHelper.GreaterThan(luceneFieldName, termType, valueAsLong));
case OperatorType.LessThanEqual:
return(LuceneQueryHelper.LessThanOrEqual(luceneFieldName, termType, valueAsLong));
case OperatorType.GreaterThanEqual:
return(LuceneQueryHelper.GreaterThanOrEqual(luceneFieldName, termType, valueAsLong));
}
break;
case LuceneFieldType.Double:
var valueAsDouble = (double)value;
switch (where.Operator)
{
case OperatorType.Equal:
return(LuceneQueryHelper.Equal(luceneFieldName, termType, valueAsDouble));
case OperatorType.NotEqual:
return(LuceneQueryHelper.NotEqual(luceneFieldName, termType, valueAsDouble));
case OperatorType.LessThan:
return(LuceneQueryHelper.LessThan(luceneFieldName, termType, valueAsDouble));
case OperatorType.GreaterThan:
return(LuceneQueryHelper.GreaterThan(luceneFieldName, termType, valueAsDouble));
case OperatorType.LessThanEqual:
return(LuceneQueryHelper.LessThanOrEqual(luceneFieldName, termType, valueAsDouble));
case OperatorType.GreaterThanEqual:
return(LuceneQueryHelper.GreaterThanOrEqual(luceneFieldName, termType, valueAsDouble));
}
break;
default:
throw new ArgumentOutOfRangeException(nameof(fieldType), fieldType, null);
}
throw new NotSupportedException("Should not happen!");
}
case OperatorType.And:
case OperatorType.AndNot:
var andPrefix = where.Operator == OperatorType.AndNot ? LucenePrefixOperator.Minus : LucenePrefixOperator.None;
return(LuceneQueryHelper.And(
ToLuceneQuery(context, query, where.Left, metadata, parameters, analyzer, getSpatialField, exact),
LucenePrefixOperator.None,
ToLuceneQuery(context, query, where.Right, metadata, parameters, analyzer, getSpatialField, exact),
andPrefix));
case OperatorType.Or:
case OperatorType.OrNot:
var orPrefix = where.Operator == OperatorType.OrNot ? LucenePrefixOperator.Minus : LucenePrefixOperator.None;
return(LuceneQueryHelper.Or(
ToLuceneQuery(context, query, where.Left, metadata, parameters, analyzer, getSpatialField, exact),
LucenePrefixOperator.None,
ToLuceneQuery(context, query, where.Right, metadata, parameters, analyzer, getSpatialField, exact),
orPrefix));
}
}
if (expression is BetweenExpression be)
{
var fieldName = ExtractIndexFieldName(query, parameters, be.Source, metadata);
var(valueFirst, valueFirstType) = GetValue(fieldName, query, metadata, parameters, be.Min);
var(valueSecond, _) = GetValue(fieldName, query, metadata, parameters, be.Max);
var(luceneFieldName, fieldType, termType) = GetLuceneField(fieldName, valueFirstType);
switch (fieldType)
{
case LuceneFieldType.String:
var valueFirstAsString = GetValueAsString(valueFirst);
var valueSecondAsString = GetValueAsString(valueSecond);
return(LuceneQueryHelper.Between(luceneFieldName, termType, valueFirstAsString, valueSecondAsString, exact));
case LuceneFieldType.Long:
var valueFirstAsLong = (long)valueFirst;
var valueSecondAsLong = (long)valueSecond;
return(LuceneQueryHelper.Between(luceneFieldName, termType, valueFirstAsLong, valueSecondAsLong));
case LuceneFieldType.Double:
var valueFirstAsDouble = (double)valueFirst;
var valueSecondAsDouble = (double)valueSecond;
return(LuceneQueryHelper.Between(luceneFieldName, termType, valueFirstAsDouble, valueSecondAsDouble));
default:
throw new ArgumentOutOfRangeException(nameof(fieldType), fieldType, null);
}
}
if (expression is InExpression ie)
{
var fieldName = ExtractIndexFieldName(query, parameters, ie.Source, metadata);
LuceneTermType termType = LuceneTermType.Null;
bool hasGotTheRealType = false;
if (ie.All)
{
var allInQuery = new BooleanQuery();
foreach (var value in GetValuesForIn(context, query, ie, metadata, parameters, fieldName))
{
if (hasGotTheRealType == false)
{
// here we assume that all the values are of the same type
termType = GetLuceneField(fieldName, value.Type).LuceneTermType;
hasGotTheRealType = true;
}
if (exact && metadata.IsDynamic)
{
fieldName = new QueryFieldName(AutoIndexField.GetExactAutoIndexFieldName(fieldName.Value), fieldName.IsQuoted);
}
allInQuery.Add(LuceneQueryHelper.Equal(fieldName, termType, value.Value, exact), Occur.MUST);
}
return(allInQuery);
}
var matches = new List <string>();
foreach (var tuple in GetValuesForIn(context, query, ie, metadata, parameters, fieldName))
{
if (hasGotTheRealType == false)
{
// we assume that the type of all the parameters is the same
termType = GetLuceneField(fieldName, tuple.Type).LuceneTermType;
hasGotTheRealType = true;
}
matches.Add(LuceneQueryHelper.GetTermValue(tuple.Value, termType, exact));
}
return(new TermsMatchQuery(fieldName, matches));
}
if (expression is TrueExpression)
{
return(new MatchAllDocsQuery());
}
if (expression is MethodExpression me)
{
var methodName = me.Name.Value;
var methodType = QueryMethod.GetMethodType(methodName);
switch (methodType)
{
case MethodType.Search:
return(HandleSearch(query, me, metadata, parameters, analyzer));
case MethodType.Boost:
return(HandleBoost(context, query, me, metadata, parameters, analyzer, getSpatialField, exact));
case MethodType.StartsWith:
return(HandleStartsWith(query, me, metadata, parameters));
case MethodType.EndsWith:
return(HandleEndsWith(query, me, metadata, parameters));
case MethodType.Lucene:
return(HandleLucene(query, me, metadata, parameters, analyzer));
case MethodType.Exists:
return(HandleExists(query, parameters, me, metadata));
case MethodType.Exact:
return(HandleExact(context, query, me, metadata, parameters, analyzer, getSpatialField));
case MethodType.Within:
case MethodType.Contains:
case MethodType.Disjoint:
case MethodType.Intersects:
return(HandleSpatial(query, me, metadata, parameters, methodType, getSpatialField));
default:
QueryMethod.ThrowMethodNotSupported(methodType, metadata.QueryText, parameters);
return(null); // never hit
}
}
throw new InvalidQueryException("Unable to understand query", query.QueryText, parameters);
}