private void VisitEquals(BinaryExpression expression)
{
var constantExpression = expression.Right as ConstantExpression;
if (constantExpression != null && true.Equals(constantExpression.Value))
{
VisitExpression(expression.Left);
return;
}
if (constantExpression != null && false.Equals(constantExpression.Value))
{
luceneQuery.OpenSubclause();
luceneQuery.Where("*:*");
luceneQuery.NegateNext();
VisitExpression(expression.Left);
luceneQuery.CloseSubclause();
return;
}
var methodCallExpression = expression.Left as MethodCallExpression;
// checking for VB.NET string equality
if (methodCallExpression != null && methodCallExpression.Method.Name == "CompareString" &&
expression.Right.NodeType == ExpressionType.Constant &&
Equals(((ConstantExpression)expression.Right).Value, 0))
{
var expressionMemberInfo = GetMember(methodCallExpression.Arguments[0]);
luceneQuery.WhereEquals(
new WhereParams
{
FieldName = expressionMemberInfo.Path,
Value = GetValueFromExpression(methodCallExpression.Arguments[1], GetMemberType(expressionMemberInfo)),
IsAnalyzed = true,
AllowWildcards = false
});
return;
}
if (IsMemberAccessForQuerySource(expression.Left) == false && IsMemberAccessForQuerySource(expression.Right))
{
VisitEquals(Expression.Equal(expression.Right, expression.Left));
return;
}
var memberInfo = GetMember(expression.Left);
luceneQuery.WhereEquals(new WhereParams
{
FieldName = memberInfo.Path,
Value = GetValueFromExpression(expression.Right, GetMemberType(memberInfo)),
IsAnalyzed = true,
AllowWildcards = false,
IsNestedPath = memberInfo.IsNestedPath
});
}
/// <inheritdoc />
public IFilterFactory <T> Equals(string fieldName, MethodCall value)
{
_documentQuery.WhereEquals(fieldName, value);
return(this);
}
