public static object GetValue <T>(ParameterExpression parameter, ExpressionValue expressionValue,
QueryParser.ComparisonContext context,
NamingStrategy namingStrategy = null)
{
if (parameter == null)
{
throw new ArgumentNullException(nameof(parameter));
}
if (expressionValue == null)
{
throw new ArgumentNullException(nameof(expressionValue));
}
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
if (expressionValue.Property.PropertyType == typeof(string))
{
return(GetString <T>(parameter, context.arguments().value()[0], namingStrategy));
}
if (expressionValue.Property.PropertyType == typeof(short) ||
expressionValue.Property.PropertyType == typeof(short?))
{
return(GetShort <T>(parameter, context.arguments().value()[0], namingStrategy));
}
if (expressionValue.Property.PropertyType == typeof(int) ||
expressionValue.Property.PropertyType == typeof(int?))
{
return(GetInt <T>(parameter, context.arguments().value()[0], namingStrategy));
}
if (expressionValue.Property.PropertyType == typeof(long) ||
expressionValue.Property.PropertyType == typeof(long?))
{
return(GetLong <T>(parameter, context.arguments().value()[0], namingStrategy));
}
if (expressionValue.Property.PropertyType == typeof(float) ||
expressionValue.Property.PropertyType == typeof(float?))
{
return(GetFloat <T>(parameter, context.arguments().value()[0], namingStrategy));
}
if (expressionValue.Property.PropertyType == typeof(double) ||
expressionValue.Property.PropertyType == typeof(double?))
{
return(GetDouble <T>(parameter, context.arguments().value()[0], namingStrategy));
}
if (expressionValue.Property.PropertyType == typeof(decimal) ||
expressionValue.Property.PropertyType == typeof(decimal?))
{
return(GetDecimal <T>(parameter, context.arguments().value()[0], namingStrategy));
}
if (expressionValue.Property.PropertyType == typeof(bool) ||
expressionValue.Property.PropertyType == typeof(bool?))
{
return(GetBoolean <T>(parameter, context.arguments().value()[0], namingStrategy));
}
if (expressionValue.Property.PropertyType == typeof(DateTime) ||
expressionValue.Property.PropertyType == typeof(DateTime?))
{
return(GetDateTime <T>(parameter, context.arguments().value()[0], namingStrategy));
}
if (expressionValue.Property.PropertyType == typeof(DateTimeOffset) ||
expressionValue.Property.PropertyType == typeof(DateTimeOffset?))
{
return(GetDateTimeOffset <T>(parameter, context.arguments().value()[0], namingStrategy));
}
return(null);
}
public static bool TryParse <T>(ParameterExpression parameter,
string selector, NamingStrategy namingStrategy, out ExpressionValue result
)
{
result = null;
try
{
result = Parse <T>(parameter, selector, namingStrategy);
return(true);
}
catch
{
return(false);
}
}