private RqlExpression VisitOperatorEq(RqlFunctionCallExpression node)
{
if (node.Arguments.Count != 2)
{
ThrowError(node, "Equality takes exactly two arguments");
}
RqlIdentifierExpression identifier = node.Arguments[0] as RqlIdentifierExpression;
if (identifier == null)
{
ThrowError(node.Arguments[0], "First argument must be a field identifier");
}
RqlConstantExpression constant = node.Arguments[1] as RqlConstantExpression;
if (constant == null)
{
ThrowError(node, "Second argument must be a constant");
}
sb.Append("{");
VisitIdentifier(identifier);
VisitConstant(constant);
sb.Append("}");
return(node);
}
private RqlExpression VisitOperatorSize(RqlFunctionCallExpression node)
{
if (node.Arguments.Count != 2)
{
ThrowError(node, "{0} takes exactly two arguments", node.Name);
}
RqlIdentifierExpression identifier = node.Arguments[0] as RqlIdentifierExpression;
if (identifier == null)
{
ThrowError(node.Arguments[0], "First argument must be an identifier");
}
RqlConstantExpression constant = node.Arguments[1] as RqlConstantExpression;
if (constant == null || constant.Value.GetType() != typeof(int))
{
ThrowError(node.Arguments[1], "Second argument must be an integer constant");
}
sb.Append("{");
VisitIdentifier(identifier);
sb.Append("{$");
sb.Append(node.Name);
sb.Append(": ");
VisitConstant(constant);
sb.Append("}");
sb.Append("}");
return(node);
}
private RqlExpression VisitOperatorLikeLikei(RqlFunctionCallExpression node)
{
if (node.Arguments.Count != 2)
{
ThrowError(node, "{0} takes exactly two arguments", node.Name);
}
RqlIdentifierExpression identifier = node.Arguments[0] as RqlIdentifierExpression;
if (identifier == null)
{
ThrowError(node.Arguments[0], "First argument must be an identifier");
}
RqlConstantExpression constant = node.Arguments[1] as RqlConstantExpression;
if (constant == null || constant.Value.GetType() != typeof(string))
{
ThrowError(node, "Second argument must be a string constant");
}
bool ignoreCase = (identifier.Name == "likei");
sb.Append("{");
VisitIdentifier(identifier);
sb.AppendFormat(@"/\b{0}/{1}", Regex.Escape((string)((RqlConstantExpression)node.Arguments[1]).Value), ignoreCase ? "i" : "");
sb.Append("}");
return(node);
}
private RqlExpression VisitOperatorNeGtGteLtLte(RqlFunctionCallExpression node)
{
if (node.Arguments.Count != 2)
{
ThrowError(node, String.Format("{0} takes exactly two arguments", node.Name));
}
RqlIdentifierExpression identifier = node.Arguments[0] as RqlIdentifierExpression;
if (identifier == null)
{
ThrowError(node.Arguments[0], "First argument must be a field identifier");
}
RqlConstantExpression constant = node.Arguments[1] as RqlConstantExpression;
if (constant == null)
{
ThrowError(node, "Second argument must be a constant");
}
sb.Append("{");
VisitIdentifier(identifier);
sb.Append("{$");
sb.Append(node.Name);
sb.Append(": ");
VisitConstant(constant);
sb.Append("}");
sb.Append("}");
return(node);
}
protected override RqlExpression VisitConstant(RqlConstantExpression node)
{
s += FormatSimpleConstant(node.Type, node.Value);
return(node);
}
protected override RqlExpression VisitConstant(RqlConstantExpression node)
{
object nodeValue = node.Value;
Type nodeType = node.Type;
// Convert RQL types into primitive types
if (nodeType == typeof(RqlId))
{
nodeValue = ((RqlId)nodeValue).ToObjectId();
nodeType = nodeValue.GetType();
}
else if (nodeType == typeof(RqlDateTime))
{
nodeValue = (DateTime)(RqlDateTime)nodeValue;
nodeType = nodeValue.GetType();
}
else if (nodeType == typeof(RqlTimeSpan))
{
nodeValue = (TimeSpan)(RqlTimeSpan)nodeValue;
nodeType = nodeValue.GetType();
}
// Now convert the primitive into the MongoDB type
if (nodeValue == null)
{
sb.Append("null");
}
else if (nodeType == typeof(string))
{
sb.Append("\"" + nodeValue + "\"");
}
else if (nodeType == typeof(bool))
{
sb.Append(nodeValue.ToString().ToLower());
}
else if (nodeType == typeof(ObjectId))
{
sb.Append("ObjectId(\"");
sb.Append(((ObjectId)nodeValue).ToString());
sb.Append("\")");
}
else if (nodeType == typeof(DateTime))
{
sb.Append("ISODate(\"");
sb.Append(((DateTime)nodeValue).ToString(RqlDateTime.FormatPattern));
sb.Append("\")");
}
else if (nodeType == typeof(TimeSpan))
{
sb.Append(((TimeSpan)nodeValue).TotalMilliseconds.ToString());
}
else if (nodeType == typeof(double))
{
sb.Append(nodeValue.ToString());
}
else if (nodeType == typeof(int))
{
sb.Append(nodeValue.ToString());
}
else
{
throw new NotImplementedException();
}
return(node);
}
