public override void GenerateCode(GeneratedMethod method, ISourceWriter writer)
{
writer.Write($"case {SpecificEvent.VariableType.FullNameInCode()} {SpecificEvent.Usage}:");
writer.IndentionLevel++;
if (AlwaysDeletes)
{
writer.Write("return null;");
}
CreationFrame?.GenerateCode(method, writer);
if (Apply != null)
{
if (CreationFrame == null)
{
var defaultConstructor = AggregateType.GetConstructor(
BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic, null, Type.EmptyTypes,
null);
if (defaultConstructor?.IsPublic == true)
{
writer.Write($"{Aggregate.Usage} ??= new {AggregateType.FullNameInCode()}();");
}
else if (defaultConstructor?.IsPublic == false)
{
writer.Write($"{Aggregate.Usage} ??= AggregateBuilder();");
}
else
{
var errorMessage =
$"Projection for {AggregateType.FullName} should either have the Create Method or Constructor for event of type {SpecificEvent.VariableType.FullNameInCode()}, or {AggregateType.FullName} should have a Default Constructor.";
writer.Write(
$"if({Aggregate.Usage} == default) throw new ArgumentException(\"{errorMessage}\");");
}
}
Apply.GenerateCode(method, writer);
}
if (Deletion != null)
{
writer.Write($"if ({Aggregate.Usage} == null) return null;");
Deletion.GenerateCode(method, writer);
}
writer.Write($"return {Aggregate.Usage};");
writer.IndentionLevel--;
Next?.GenerateCode(method, writer);
}
public override void GenerateCode(GeneratedMethod method, ISourceWriter writer)
{
writer.Write($"case {SpecificEvent.VariableType.FullNameInCode()} {SpecificEvent.Usage}:");
writer.IndentionLevel++;
if (AlwaysDeletes)
{
writer.Write("return null;");
}
CreationFrame?.GenerateCode(method, writer);
if (Apply != null)
{
if (AggregateType.GetConstructors().Any(x => !x.GetParameters().Any()))
{
writer.Write($"{Aggregate.Usage} ??= new {AggregateType.FullNameInCode()}();");
}
Apply.GenerateCode(method, writer);
}
if (Deletion != null)
{
writer.Write($"if ({Aggregate.Usage} == null) return null;");
Deletion.GenerateCode(method, writer);
}
writer.Write($"return {Aggregate.Usage};");
writer.IndentionLevel--;
Next?.GenerateCode(method, writer);
}