private static void ScanDeclarations(IEnumerable <XElement> elements, out ExtendedKeyedCollection <string, PropertyDefinition> properties, out ExtendedKeyedCollection <string, Variable> variables)
{
properties = null;
variables = null;
foreach (XElement element in elements)
{
switch (element.Kind())
{
case ElementKind.Variable:
{
variables = variables ?? new ExtendedKeyedCollection <string, Variable>(DefaultComparer.StringComparer);
string variableName = element.AttributeValueOrThrow(AttributeNames.Name);
if (variables.Contains(variableName))
{
Throw(ErrorMessages.ItemAlreadyDefined(ElementNames.Variable, variableName), element);
}
var variable = new Variable(
variableName,
element.AttributeValueOrThrow(AttributeNames.Value));
variables.Add(variable);
break;
}
case ElementKind.Property:
{
properties = properties ?? new ExtendedKeyedCollection <string, PropertyDefinition>();
string propertyName = element.AttributeValueOrThrow(AttributeNames.Name);
if (properties.Contains(propertyName))
{
Throw(ErrorMessages.ItemAlreadyDefined(ElementNames.Property, propertyName), element);
}
var property = new PropertyDefinition(
propertyName,
element.AttributeValueOrDefault(AttributeNames.DefaultValue),
element.AttributeValueAsBooleanOrDefault(AttributeNames.IsCollection),
element.AttributeValueAsBooleanOrDefault(AttributeNames.IsRequired),
element);
properties.Add(property);
break;
}
default:
{
ThrowOnUnknownElement(element);
break;
}
}
}
}
private static void ScanDeclarations(IEnumerable <XElement> elements, out ExtendedKeyedCollection <string, PropertyDefinition> properties, out ExtendedKeyedCollection <string, Variable> variables)
{
properties = null;
variables = null;
foreach (XElement element in elements)
{
switch (element.Kind())
{
case ElementKind.Variable:
{
variables = variables ?? new ExtendedKeyedCollection <string, Variable>(DefaultComparer.StringComparer);
string variableName = element.AttributeValueOrThrow(AttributeNames.Name);
if (variables.Contains(variableName))
{
Throw(ErrorMessages.ItemAlreadyDefined(ElementNames.Variable, variableName), element);
}
var variable = new Variable(
variableName,
element.AttributeValueOrThrow(AttributeNames.Value));
variables.Add(variable);
break;
}
case ElementKind.Property:
{
properties = properties ?? new ExtendedKeyedCollection <string, PropertyDefinition>();
string name = null;
bool isCollection = false;
bool isRequired = false;
string defaultValue = null;
string description = null;
foreach (XAttribute attribute in element.Attributes())
{
switch (attribute.LocalName())
{
case AttributeNames.Name:
{
name = attribute.Value;
break;
}
case AttributeNames.IsCollection:
{
isCollection = bool.Parse(attribute.Value);
break;
}
case AttributeNames.IsRequired:
{
isRequired = bool.Parse(attribute.Value);
break;
}
case AttributeNames.DefaultValue:
{
defaultValue = attribute.Value;
break;
}
case AttributeNames.Description:
{
description = attribute.Value;
break;
}
default:
{
Throw(ErrorMessages.UnknownAttribute(attribute), element);
break;
}
}
}
if (properties.Contains(name))
{
Throw(ErrorMessages.ItemAlreadyDefined(ElementNames.Property, name), element);
}
if (isCollection &&
defaultValue != null)
{
Throw(ErrorMessages.CollectionPropertyCannotDefineDefaultValue(), element);
}
var property = new PropertyDefinition(
name,
isCollection,
isRequired,
defaultValue,
description,
element);
properties.Add(property);
break;
}
default:
{
ThrowOnUnknownElement(element);
break;
}
}
}
}
