/// <summary>
/// Loads a user's schema file
/// </summary>
internal static TemplateSchema Load(IObjectReader objectReader)
{
var context = new TemplateContext
{
CancellationToken = CancellationToken.None,
Errors = new TemplateValidationErrors(maxErrors: 10, maxMessageLength: 500),
Memory = new TemplateMemory(
maxDepth: 50,
maxEvents: 1000000, // 1 million
maxBytes: 1024 * 1024), // 1 mb
TraceWriter = new EmptyTraceWriter(),
};
var value = TemplateReader.Read(context, TemplateConstants.TemplateSchema, objectReader, null, Schema, out _);
if (context.Errors.Count > 0)
{
throw new TemplateValidationException(context.Errors);
}
var mapping = value.AssertMapping(TemplateConstants.TemplateSchema);
var schema = new TemplateSchema(mapping);
schema.Validate();
return(schema);
}
private static IEnumerable <KeyValuePair <String, PropertyValue> > GetMergedProperties(
TemplateSchema schema,
MappingDefinition mapping)
{
foreach (var property in mapping.Properties)
{
yield return(property);
}
if (!String.IsNullOrEmpty(mapping.Inherits))
{
var inherited = schema.GetDefinition(mapping.Inherits) as MappingDefinition;
if (!String.IsNullOrEmpty(inherited.Inherits))
{
throw new NotSupportedException("Multiple levels of inheritance is not supported");
}
foreach (var property in inherited.Properties)
{
if (!mapping.Properties.ContainsKey(property.Key))
{
yield return(property);
}
}
}
}
internal override void Validate(
TemplateSchema schema,
String name)
{
if (!String.IsNullOrEmpty(Constant) && RequireNonEmpty)
{
throw new ArgumentException($"Properties '{TemplateConstants.Constant}' and '{TemplateConstants.RequireNonEmpty}' cannot both be set");
}
}
internal override void Validate(
TemplateSchema schema,
String name)
{
if (String.IsNullOrEmpty(ItemType))
{
throw new ArgumentException($"'{name}' does not define '{TemplateConstants.ItemType}'");
}
// Lookup item type
schema.GetDefinition(ItemType);
}
internal override void Validate(
TemplateSchema schema,
String name)
{
}
internal abstract void Validate(
TemplateSchema schema,
String name);
internal override void Validate(
TemplateSchema schema,
String name)
{
// Lookup loose key type
if (!String.IsNullOrEmpty(LooseKeyType))
{
schema.GetDefinition(LooseKeyType);
// Lookup loose value type
if (!String.IsNullOrEmpty(LooseValueType))
{
schema.GetDefinition(LooseValueType);
}
else
{
throw new ArgumentException($"Property '{TemplateConstants.LooseKeyType}' is defined but '{TemplateConstants.LooseValueType}' is not defined on '{name}'");
}
}
// Otherwise validate loose value type not be defined
else if (!String.IsNullOrEmpty(LooseValueType))
{
throw new ArgumentException($"Property '{TemplateConstants.LooseValueType}' is defined but '{TemplateConstants.LooseKeyType}' is not defined");
}
// Lookup each property
foreach (var property in Properties)
{
if (String.IsNullOrEmpty(property.Value.Type))
{
throw new ArgumentException($"Type not specified for the '{property.Key}' property on the '{name}' type");
}
schema.GetDefinition(property.Value.Type);
}
if (!String.IsNullOrEmpty(Inherits))
{
var inherited = schema.GetDefinition(Inherits);
if (inherited.Context.Length > 0)
{
throw new NotSupportedException($"Property '{TemplateConstants.Context}' is not supported on inhertied definitions");
}
if (inherited.DefinitionType != DefinitionType.Mapping)
{
throw new NotSupportedException($"Expected structure of inherited definition to match. Actual '{inherited.DefinitionType}'");
}
var inheritedMapping = inherited as MappingDefinition;
if (!String.IsNullOrEmpty(inheritedMapping.Inherits))
{
throw new NotSupportedException($"Property '{TemplateConstants.Inherits}' is not supported on inherited definition");
}
if (!String.IsNullOrEmpty(inheritedMapping.LooseKeyType))
{
throw new NotSupportedException($"Property '{TemplateConstants.LooseKeyType}' is not supported on inherited definition");
}
if (!String.IsNullOrEmpty(inheritedMapping.LooseValueType))
{
throw new NotSupportedException($"Property '{TemplateConstants.LooseValueType}' is not supported on inherited definition");
}
}
}
internal override void Validate(
TemplateSchema schema,
String name)
{
if (OneOf.Count == 0)
{
throw new ArgumentException($"'{name}' does not contain any references");
}
var foundLooseKeyType = false;
var mappingDefinitions = default(List <MappingDefinition>);
var sequenceDefinition = default(SequenceDefinition);
var nullDefinition = default(NullDefinition);
var booleanDefinition = default(BooleanDefinition);
var numberDefinition = default(NumberDefinition);
var stringDefinitions = default(List <StringDefinition>);
foreach (var nestedType in OneOf)
{
var nestedDefinition = schema.GetDefinition(nestedType);
if (nestedDefinition.ReaderContext.Length > 0)
{
throw new ArgumentException($"'{name}' is a one-of definition and references another definition that defines context. This is currently not supported.");
}
if (nestedDefinition is MappingDefinition mappingDefinition)
{
if (mappingDefinitions == null)
{
mappingDefinitions = new List <MappingDefinition>();
}
mappingDefinitions.Add(mappingDefinition);
if (!String.IsNullOrEmpty(mappingDefinition.LooseKeyType))
{
foundLooseKeyType = true;
}
}
else if (nestedDefinition is SequenceDefinition s)
{
// Multiple sequence definitions not allowed
if (sequenceDefinition != null)
{
throw new ArgumentException($"'{name}' refers to more than one '{TemplateConstants.Sequence}'");
}
sequenceDefinition = s;
}
else if (nestedDefinition is NullDefinition n)
{
// Multiple sequence definitions not allowed
if (nullDefinition != null)
{
throw new ArgumentException($"'{name}' refers to more than one '{TemplateConstants.Null}'");
}
nullDefinition = n;
}
else if (nestedDefinition is BooleanDefinition b)
{
// Multiple boolean definitions not allowed
if (booleanDefinition != null)
{
throw new ArgumentException($"'{name}' refers to more than one '{TemplateConstants.Boolean}'");
}
booleanDefinition = b;
}
else if (nestedDefinition is NumberDefinition num)
{
// Multiple number definitions not allowed
if (numberDefinition != null)
{
throw new ArgumentException($"'{name}' refers to more than one '{TemplateConstants.Number}'");
}
numberDefinition = num;
}
else if (nestedDefinition is StringDefinition stringDefinition)
{
// First string definition
if (stringDefinitions == null)
{
stringDefinitions = new List <StringDefinition>();
}
// Multiple string definitions, all must be 'Constant'
else if ((stringDefinitions.Count == 1 && String.IsNullOrEmpty(stringDefinitions[0].Constant)) ||
String.IsNullOrEmpty(stringDefinition.Constant))
{
throw new ArgumentException($"'{name}' refers to more than one '{TemplateConstants.Scalar}', but some do not set '{TemplateConstants.Constant}'");
}
stringDefinitions.Add(stringDefinition);
}
else
{
throw new ArgumentException($"'{name}' refers to a '{nestedDefinition.DefinitionType}' definition");
}
}
if (mappingDefinitions?.Count > 1)
{
if (foundLooseKeyType)
{
throw new ArgumentException($"'{name}' refers to two mappings that both set '{TemplateConstants.LooseKeyType}'");
}
var seenProperties = new Dictionary <String, PropertyValue>(StringComparer.Ordinal);
foreach (var mappingDefinition in mappingDefinitions)
{
foreach (var newProperty in GetMergedProperties(schema, mappingDefinition))
{
// Already seen
if (seenProperties.TryGetValue(newProperty.Key, out PropertyValue existingProperty))
{
// Types match
if (String.Equals(existingProperty.Type, newProperty.Value.Type, StringComparison.Ordinal))
{
continue;
}
// Collision
throw new ArgumentException($"'{name}' contains two mappings with the same property, but each refers to a different type. All matching properties must refer to the same type.");
}
// New
else
{
seenProperties.Add(newProperty.Key, newProperty.Value);
}
}
}
}
}
