/// <summary>
/// Initializes a new instance of the <see cref="AvroEnum"/> class.
/// </summary>
/// <param name="schema">The schema.</param>
public AvroEnum(Schema.Schema schema)
{
this.schema = schema as EnumSchema;
if (this.schema == null)
{
throw new ArgumentException(string.Format(CultureInfo.InvariantCulture, "Enum schema expected."), "schema");
}
}
/// <summary>
/// Initializes a new instance of the <see cref="AvroEnum"/> class.
/// </summary>
/// <param name="schema">The schema.</param>
public AvroEnum(Schema.Schema schema)
{
this.schema = schema as EnumSchema;
if (this.schema == null)
{
throw new ArgumentException(string.Format(CultureInfo.InvariantCulture, "Enum schema expected."), "schema");
}
}
/// <summary>
/// Initializes a new instance of the <see cref="AvroRecord"/> class.
/// </summary>
/// <param name="schema">The schema.</param>
public AvroRecord(Schema.Schema schema)
{
this.schema = schema as RecordSchema;
if (this.schema == null)
{
throw new ArgumentException(string.Format(CultureInfo.InvariantCulture, "Expected record schema."), "schema");
}
this.values = new object[this.schema.Fields.Count];
}
public ODataAvroWriter(ODataAvroOutputContext outputContext, Action<object> writeAction, Schema schema, bool writingFeed)
{
Debug.Assert(outputContext != null, "outputContext != null");
Debug.Assert(writeAction != null, "flushAction != null");
this.outputContext = outputContext;
this.writeAction = writeAction;
this.schema = schema;
this.writingFeed = writingFeed;
if (writingFeed)
{
this.entityObjectList = new List<AvroRecord>();
}
}
/// <summary>
/// Parses a schema and generates code from it and writes it to the stream.
/// </summary>
/// <param name="schema">The schema.</param>
/// <param name="defaultNamespace">The default namespace.</param>
/// <param name="forceNamespace">Determines whether the defaultNamespace should be used.</param>
/// <param name="stream">The stream.</param>
public static void Generate(Schema schema, string defaultNamespace, bool forceNamespace, Stream stream)
{
if (schema == null)
{
throw new ArgumentNullException("schema");
}
if (defaultNamespace == null)
{
throw new ArgumentNullException("defaultNamespace");
}
if (stream == null)
{
throw new ArgumentNullException("stream");
}
GeneratorCore.Generate(schema, defaultNamespace, forceNamespace, stream);
}
/// <summary>
/// Reads the schema and generates the code to the stream.
/// </summary>
/// <param name="schema">The schema.</param>
/// <param name="defaultNamespace">The default namespace.</param>
/// <param name="forceNamespace">Determines whether the defaultNamespace should be used.</param>
/// <param name="stream">The stream.</param>
public static void Generate(Schema schema, string defaultNamespace, bool forceNamespace, Stream stream)
{
var recordSchema = schema as RecordSchema;
var enumSchema = schema as EnumSchema;
string code;
if (recordSchema != null)
{
code = GenerateCore(recordSchema, defaultNamespace, forceNamespace);
}
else if (enumSchema != null)
{
code = GenerateCore(enumSchema, defaultNamespace, forceNamespace);
}
else
{
throw new ArgumentException("Unsupported schema: only record and enum schemas are supported.");
}
var encoding = new UTF8Encoding();
byte[] bytes = encoding.GetBytes(code);
stream.Write(bytes, 0, bytes.Length);
}
private void WriteEntryImplementation(ODataEntry entry)
{
if (this.schema == null)
{
this.schema = this.outputContext.AvroWriter.UpdateSchema(entry, null, this.writingFeed);
}
var obj = (AvroRecord)ODataAvroConvert.FromODataObject(entry, this.schema);
if (this.writingFeed)
{
this.entityObjectList.Add(obj);
}
else
{
this.currentEntityObject = obj;
}
}
private void VisitDynamic(Schema schema)
{
this.VisitCore((dynamic)schema);
}
public void Visit(Schema schema)
{
this.visited.Clear();
this.VisitDynamic(schema);
}
public static object FromODataObject(object value, Schema schema)
{
var complexValue = value as ODataComplexValue;
if (complexValue != null)
{
RecordSchema recordSchema = schema as RecordSchema;
if (recordSchema == null)
{
var unionSchema = schema as UnionSchema;
if (unionSchema != null)
{
recordSchema = unionSchema.Schemas.OfType<RecordSchema>().Single();
}
else
{
throw new ApplicationException("not supported schema found.");
}
}
var record = new AvroRecord(recordSchema);
foreach (var prop in complexValue.Properties)
{
if (prop.Value is ODataComplexValue)
{
continue;
}
record[prop.Name] = prop.Value;
}
return record;
}
var entry = value as ODataEntry;
if (entry != null)
{
var record = new AvroRecord(schema);
foreach (var property in entry.Properties)
{
var recordSchema = (RecordSchema)schema;
RecordField field;
recordSchema.TryGetField(property.Name, out field);
record[property.Name] = FromODataObject(property.Value, field != null ? field.TypeSchema : null);
}
return record;
}
var error = value as ODataError;
if (error != null)
{
var record = new AvroRecord(schema);
record["ErrorCode"] = error.ErrorCode;
record["Message"] = error.Message;
return record;
}
var collection = value as ODataCollectionValue;
if (collection != null)
{
if (collection.Items is IEnumerable<object>)
{
return ((IEnumerable<object>)collection.Items).ToArray();
}
return collection.Items;
}
return value;
}