public override (Expression, ExpressionConversionResult) Convert(Esprima.Ast.ObjectExpression objectExpression, ExpressionConverterContext context, ExpressionConverterScope scope, bool allowTerminal, params Type[] genericArguments)
{
if (scope.TargetType != null)
{
var code = context.Source.Substring(objectExpression.Range.Start, objectExpression.Range.End - objectExpression.Range.Start + 1);
using (var reader = new StringReader(code)) {
var @object = JsonSerializer.Deserialize(reader, scope.TargetType);
return(Expression.Constant(@object), DefaultResult);
}
}
var propertyValueExpressions = objectExpression.Properties.Select(property => new {
Property = property,
ValueExpression = context.ExpressionConverterResolver.Convert(property.Value, context, scope, false)
}).ToArray();
var tuples = propertyValueExpressions.Select(propertyValueExpression => new Tuple <Type, string>(propertyValueExpression.ValueExpression.Type, ((Esprima.Ast.Identifier)propertyValueExpression.Property.Key).Name)).ToArray();
var set = new HashSet <Tuple <Type, string> >(tuples);
Type anonymousType = null;
if (!Cache.TryGetValue(set, out anonymousType))
{
anonymousType = AnonymousTypeBuilder.BuildAnonymousType(set);
Cache[set] = anonymousType;
}
var newExpression = Expression.New(anonymousType.GetConstructor(new Type[0]));
var initializationExpression = Expression.MemberInit(
newExpression,
propertyValueExpressions.Select(pve => Expression.Bind(anonymousType.GetProperty(((Esprima.Ast.Identifier)pve.Property.Key).Name), pve.ValueExpression))
);
return(initializationExpression, DefaultResult);
}
public void WriteAssemblyToFileForDebugging()
{
var tb = new AnonymousTypeBuilder(new[] { "Foo", "Bar" });
var def = tb.BuildAnonymousType();
def.Module.Assembly.Write("tempasm.dll");
Assert.Fail("TODO: Remove me");
}