private void SetFieldValue(object value)
{
if (_status == ODataFilterBuilderStatuses.BuildingFieldFilter)
{
if (_filterNode is ISingleValue)
{
((ISingleValue)_filterNode).FieldValue = value;
}
else
{
throw new NotImplementedException();
}
_filter.Enqueue(_filterNode);
_status = ODataFilterBuilderStatuses.Initial;
}
else if (_status == ODataFilterBuilderStatuses.BuildingFunctionCallParameters)
{
if (_filterNode is ISingleValue)
{
((ISingleValue)_filterNode).FieldValue = value;
}
else
{
throw new NotImplementedException();
}
}
else if (_status == ODataFilterBuilderStatuses.BuildingMultiValueOperatorValues)
{
if (_filterNode is IMultiValue)
{
((IMultiValue)_filterNode).FieldValues.Add(value);
}
else
{
throw new NotImplementedException();
}
}
else
{
throw new NotImplementedException();
}
}
public Queue <FilterNode> Build(string query)
{
if (string.IsNullOrWhiteSpace(query))
{
return(null);
}
_tokenizer = new ODataFilterTokenizer(query.TrimEnd().ToCharArray());
while (!_tokenizer.End())
{
var(tokenType, token) = _tokenizer.GetToken();
switch (tokenType)
{
case ODataFilterTokenizerTokenTypes.OpeningParenthesis:
{
// Function calls have parenthesis so ignore them
if (_status == ODataFilterBuilderStatuses.Initial)
{
_filter.Enqueue(FilterNode.BeginGrouping);
}
else if (_status == ODataFilterBuilderStatuses.BuildingFunctionCall)
{
_status = ODataFilterBuilderStatuses.BuildingFunctionCallParameters;
}
else if (_status == ODataFilterBuilderStatuses.BuildingMultiValueOperator)
{
_status = ODataFilterBuilderStatuses.BuildingMultiValueOperatorValues;
}
else
{
throw new NotImplementedException();
}
}
break;
case ODataFilterTokenizerTokenTypes.ClosingParenthesis:
{
// Function calls have parenthesis so ignore them
if (_status == ODataFilterBuilderStatuses.Initial)
{
_filter.Enqueue(FilterNode.EndGrouping);
}
else if (_status == ODataFilterBuilderStatuses.BuildingFunctionCallParameters)
{
_filter.Enqueue(_filterNode);
_status = ODataFilterBuilderStatuses.Initial;
}
else if (_status == ODataFilterBuilderStatuses.BuildingMultiValueOperatorValues)
{
_filter.Enqueue(_filterNode);
_status = ODataFilterBuilderStatuses.Initial;
}
else
{
throw new NotImplementedException();
}
}
break;
case ODataFilterTokenizerTokenTypes.LogicalOperator:
{
switch (token)
{
case "not":
{
_filter.Enqueue(FilterNode.Not);
}
break;
case "and":
{
_filter.Enqueue(FilterNode.And);
}
break;
case "or":
{
_filter.Enqueue(FilterNode.Or);
}
break;
default: throw new NotImplementedException();
}
}
break;
case ODataFilterTokenizerTokenTypes.FieldName:
{
if (_status == ODataFilterBuilderStatuses.Initial)
{
_status = ODataFilterBuilderStatuses.BuildingFieldFilter;
_fieldName = token;
}
else if (_status == ODataFilterBuilderStatuses.BuildingFunctionCallParameters)
{
((TwoParametersFunctionCallFilterNode)_filterNode).FieldName = token;
}
else
{
throw new NotImplementedException();
}
}
break;
case ODataFilterTokenizerTokenTypes.ComparisonOperator:
{
if (_status == ODataFilterBuilderStatuses.BuildingFieldFilter)
{
if (IsSingleValueFieldFilterNode(token))
{
_filterNode = new SingleValueFieldFilterNode
{
FieldName = _fieldName,
Operator = GetSingleValueFieldFilterOperator(token)
};
}
else
{
throw new NotImplementedException();
}
}
else
{
throw new NotImplementedException();
}
}
break;
case ODataFilterTokenizerTokenTypes.FunctionName:
{
if (_status == ODataFilterBuilderStatuses.Initial)
{
_status = ODataFilterBuilderStatuses.BuildingFunctionCall;
switch (token)
{
case "contains":
{
_filterNode = new ContainsFunctionCallFilterNode();
}
break;
default: throw new NotImplementedException();
}
}
else
{
throw new NotImplementedException();
}
}
break;
case ODataFilterTokenizerTokenTypes.MultiValueOperator:
{
if (_status == ODataFilterBuilderStatuses.BuildingFieldFilter)
{
_status = ODataFilterBuilderStatuses.BuildingMultiValueOperator;
switch (token)
{
case "in":
{
_filterNode = new InOperatorFilterNode
{
FieldName = _fieldName
};
}
break;
default: throw new NotImplementedException();
}
}
else
{
throw new NotImplementedException();
}
}
break;
case ODataFilterTokenizerTokenTypes.StringLiteral:
{
SetFieldValue(token);
}
break;
case ODataFilterTokenizerTokenTypes.NumericValue:
{
SetFieldValue(int.Parse(token));
}
break;
case ODataFilterTokenizerTokenTypes.BooleanValue:
{
SetFieldValue(bool.Parse(token));
}
break;
case ODataFilterTokenizerTokenTypes.Comma:
{
// Ignore
}
break;
default: throw new NotImplementedException();
}
}
return(_filter);
}