public ODataVisitor(TextWriter writer, IQueryWriterSettings settings, IServerContext context, ODataVersion version = ODataVersion.All)
{
_writer = writer;
_settings = settings;
_context = context;
_version = version;
}
public ILiteral Normalize(IQueryWriterSettings settings)
{
if (!(Value is string))
{
if (Expressions.TryGetLiteral(Value, out var lit))
{
return(lit);
}
else
{
throw new NotSupportedException();
}
}
var dataType = default(string);
if (!string.IsNullOrEmpty(TypeProvider?.Table.Type))
{
var props = settings.GetProperties(TypeProvider?.Table.Type);
if (props != null && props.TryGetValue(TypeProvider.Name, out var propDefn))
{
dataType = propDefn.DataType().Value;
if (dataType == "foreign")
{
dataType = null;
}
}
}
var str = (string)Value;
if (dataType == "boolean")
{
return(new BooleanLiteral(str == "1"));
}
else if ((dataType == null || dataType == "date") &&
Context.TryParseDateTime(str, out var date) &&
date.HasValue)
{
return(new DateTimeLiteral(date.Value.LocalDateTime));
}
else if ((dataType == null || dataType == "integer") &&
long.TryParse(str, NumberStyles.Integer, CultureInfo.InvariantCulture, out long lng))
{
return(new IntegerLiteral(lng));
}
else if ((dataType == null || dataType == "float" || dataType == "decimal") &&
double.TryParse(str, NumberStyles.Float, CultureInfo.InvariantCulture, out double dbl))
{
return(new FloatLiteral(dbl));
}
else
{
return(new StringLiteral(str));
}
}
/// <summary>
/// Creates an OData URL string to represent the query.
/// </summary>
/// <param name="settings">The settings.</param>
/// <param name="context">The context.</param>
/// <param name="version">The version.</param>
/// <returns>OData URL (relative to an unspecified base), e.g. Part?$skip=10&$take=20</returns>
public string ToOData(IQueryWriterSettings settings, IServerContext context, ODataVersion version = ODataVersion.All)
{
using (var writer = new StringWriter())
{
var visitor = new ODataVisitor(writer, settings, context, version);
visitor.Visit(this);
writer.Flush();
return(writer.ToString());
}
}
internal void TryFillName(IQueryWriterSettings Settings)
{
if (string.IsNullOrEmpty(Type) && TypeProvider?.Table != null)
{
TypeProvider.Table.TryFillName(Settings);
if (!string.IsNullOrEmpty(TypeProvider.Table.Type))
{
var props = Settings.GetProperties(TypeProvider.Table.Type);
if (props != null &&
!string.IsNullOrEmpty(TypeProvider.Name) &&
props.TryGetValue(TypeProvider.Name, out var propDefn) &&
propDefn.DataType().Value == "item")
{
Type = propDefn.DataSource().KeyedName().Value;
}
}
}
}
public SqlServerVisitor(TextWriter writer, IQueryWriterSettings settings, IServerContext context)
: this(writer, settings)
{
Context = context;
}
public SqlServerVisitor(TextWriter writer, IQueryWriterSettings settings)
{
Writer = writer;
Settings = settings;
RenderOption = (settings as IAmlSqlWriterSettings)?.RenderOption ?? SqlRenderOption.Default;
}
public OracleSqlVisitor(System.IO.TextWriter writer, IQueryWriterSettings settings, IServerContext context) : base(writer, settings, context)
{
}
public OracleSqlVisitor(System.IO.TextWriter writer, IQueryWriterSettings settings) : base(writer, settings)
{
}
