private static Func <TObject, JsonData> BuildWriteMethod(ParameterExpression instance, PropertyInfo property,
Expression valueConverter)
{
const string writeMethodName = nameof(IJsonConverter <object> .Write);
var propertyValue = Expression.Property(instance, property);
var body = ExpressionUtils.Call(valueConverter, writeMethodName, propertyValue);
return(Expression
.Lambda <Func <TObject, JsonData> >(body, instance)
.Compile());
}
private static Action <TObject, TextWriter> BuildSerializeMethod(ParameterExpression instance,
PropertyInfo property, Expression valueConverter)
{
const string serializeMethodName = nameof(IJsonConverter <object> .Serialize);
var writer = Expression.Parameter(Typeof <TextWriter> .Raw, "writer");
var propertyValue = Expression.Property(instance, property);
var body = ExpressionUtils.Call(valueConverter, serializeMethodName, propertyValue, writer);
return(Expression
.Lambda <Action <TObject, TextWriter> >(body, instance, writer)
.Compile());
}
private static Action <TObject, JsonData> BuildReadMethod(ParameterExpression instance, PropertyInfo property,
Expression valueConverter)
{
const string readMethodName = nameof(IJsonConverter <object> .Read);
var data = Expression.Parameter(Typeof <JsonData> .Raw, "data");
var propertyValue = ExpressionUtils.Call(valueConverter, readMethodName, data);
var body = ExpressionUtils.SetProperty(instance, property, propertyValue);
return(Expression
.Lambda <Action <TObject, JsonData> >(body, instance, data)
.Compile());
}
private static DeserializeMethod <TObject> BuildDeserializeMethod(ParameterExpression instance,
PropertyInfo property, Expression valueConverter)
{
const string deserializeMethodName = nameof(IJsonConverter <object> .Deserialize);
var tokenizer = Expression.Parameter(JsonTokenizer.ByRefType, "tokenizer");
var propertyValue = ExpressionUtils.Call(valueConverter, deserializeMethodName, tokenizer);
var body = ExpressionUtils.SetProperty(instance, property, propertyValue);
return(Expression
.Lambda <DeserializeMethod <TObject> >(body, instance, tokenizer)
.Compile());
}
public static TDelegate BuildDeserialize <TDelegate>(
ParameterExpression instance,
PropertyInfo property,
Expression valueConverter) where TDelegate : Delegate
{
const string deserializeMethodName = nameof(IJsonConverter <object> .Deserialize);
var source = Expression.Parameter(typeof(JsonTokenizer), "source");
var propertyValue = ExpressionUtils.Call(valueConverter, deserializeMethodName, source);
var body = ExpressionUtils.SetProperty(instance, property, propertyValue);
return(Expression
.Lambda <TDelegate>(body, source, instance)
.Compile());
}
public static TDelegate BuildSerialize <TDelegate>(
ParameterExpression instance,
PropertyInfo property,
Expression valueConverter) where TDelegate : Delegate
{
const string serializeMethodName = nameof(IJsonConverter <object> .Serialize);
var output = Expression.Parameter(typeof(TextWriter), "output");
var propertyValue = Expression.Property(instance, property);
var body = ExpressionUtils.Call(valueConverter, serializeMethodName, propertyValue, output);
return(Expression
.Lambda <TDelegate>(body, instance, output)
.Compile());
}
public static Func <TSystem, CancellationToken, Task> BuildSystemUpdateMethod <TSystem>()
{
var systemType = typeof(TSystem);
string methodName;
if (systemType == typeof(IAfterUpdateSystem))
{
methodName = nameof(IAfterUpdateSystem.AfterUpdate);
}
else if (systemType == typeof(IBeforeUpdateSystem))
{
methodName = nameof(IBeforeUpdateSystem.BeforeUpdate);
}
else if (systemType == typeof(IBootstrapSystem))
{
methodName = nameof(IBootstrapSystem.Bootstrap);
}
else if (systemType == typeof(ICleanupSystem))
{
methodName = nameof(ICleanupSystem.Cleanup);
}
else if (systemType == typeof(IInitSystem))
{
methodName = nameof(IInitSystem.Init);
}
else if (systemType == typeof(IUpdateSystem))
{
methodName = nameof(IUpdateSystem.Update);
}
else
{
throw Error.InvalidOperation("Isn't system type");
}
var system = Expression.Parameter(systemType);
var token = Expression.Parameter(typeof(CancellationToken));
var call = ExpressionUtils.Call(system, methodName, token);
return(Expression
.Lambda <Func <TSystem, CancellationToken, Task> >(call, system, token)
.Compile());
}
public static TDelegate BuildWrite <TDelegate>(
ParameterExpression instance,
PropertyInfo property,
Expression valueConverter) where TDelegate : Delegate
{
const string addMethodMane = nameof(JsonObject.Add);
const string writeMethodName = nameof(IJsonConverter <object> .Write);
var output = Expression.Parameter(typeof(JsonObject), "output");
var propertyName = Expression.Constant(property.Name);
var propertyValue = Expression.Property(instance, property);
var propertyData = ExpressionUtils.Call(valueConverter, writeMethodName, propertyValue);
var body = ExpressionUtils.Call(output, addMethodMane, propertyName, propertyData);
return(Expression
.Lambda <TDelegate>(body, instance, output)
.Compile());
}
public static TDelegate BuildRead <TDelegate>(
ParameterExpression instance,
PropertyInfo property,
Expression valueConverter) where TDelegate : Delegate
{
const string tryGetMethodName = nameof(JsonObject.TryGet);
const string readMethodName = nameof(IJsonConverter <object> .Read);
var source = Expression.Parameter(typeof(JsonObject), "source");
var propertyName = Expression.Constant(property.Name);
var propertyData = Expression.Variable(Typeof <JsonData> .Raw, "propertyData");
var propertyExists = ExpressionUtils.Call(source, tryGetMethodName, propertyName, propertyData);
var propertyValue = ExpressionUtils.Call(valueConverter, readMethodName, propertyData);
var body = Expression.Block(
new[] { propertyData },
Expression.IfThen(propertyExists, ExpressionUtils.SetProperty(instance, property, propertyValue)));
return(Expression
.Lambda <TDelegate>(body, source, instance)
.Compile());
}
