private SwitchCase BuildWriteBranch(object key, FieldDesc fieldDesc, Expression pWriter, Expression pItem, LabelTarget exit)
{
List <Expression> body = new List <Expression>();
body.Add(SwitchField.BuildWriteOne(pWriter, key));
if (fieldDesc != null)
{
body.Add(fieldDesc.BuildWrite(pWriter, pItem));
}
body.Add(Expression.Return(exit));
return(Expression.SwitchCase(Expression.Block(body), Expression.Constant(key)));
}
public Delegate BuildReader(Type targetType)
{
ParameterExpression pReader = Expression.Parameter(typeof(Reader));
List <ParameterExpression> variables = new List <ParameterExpression>();
List <Expression> body = new List <Expression>();
ParameterExpression resultVar = Expression.Variable(targetType, "result");
variables.Add(resultVar);
BinaryExpression assign = Expression.Assign(resultVar, Expression.New(targetType));
body.Add(assign);
body.Add(SwitchField.BuildAssign(SwitchField.BuildReadOne(pReader), resultVar));
LabelTarget exit = Expression.Label();
List <SwitchCase> cases = new List <SwitchCase>();
foreach (var branch in Branches)
{
cases.Add(BuildReadBranch(branch.Key, branch.Value, resultVar, pReader, exit));
}
body.Add(
Expression.Switch(
Expression.PropertyOrField(resultVar, SwitchField.MInfo.Name),
Expression.Block(ThrowUnexpectedValue(Expression.PropertyOrField(resultVar, SwitchField.MInfo.Name))),
cases.ToArray())
);
body.Add(Expression.Label(exit));
body.Add(resultVar);
BlockExpression block = Expression.Block(variables, body);
return(Expression
.Lambda(typeof(ReadOneDelegate <>).MakeGenericType(targetType), block, pReader)
.Compile());
}
public override object ReadJson(JsonReader reader,
Type objectType, object existingValue,
JsonSerializer serializer)
{
var jsonObject = JObject.Load(reader);
var field = default(IIntegrationSetupField);
var fieldToken = jsonObject["FieldType"];
if (fieldToken is null)
{
fieldToken = jsonObject["fieldType"];
}
switch (fieldToken.ToString())
{
case nameof(CheckboxField):
field = new CheckboxField();
break;
case nameof(ShortTextField):
field = new ShortTextField();
break;
case nameof(LongTextField):
field = new LongTextField();
break;
case nameof(SsmlField):
field = new SsmlField();
break;
case nameof(SelectField):
field = new SelectField();
break;
case nameof(SwitchField):
field = new SwitchField();
break;
}
serializer.Populate(jsonObject.CreateReader(), field);
return(field);
}
