public DynamicReadTravellerBuilder(MethodBuilder builder, SerializableType target, TravellerContext context)
{
_target = target;
_context = context;
_il = builder.IL;
_visitorVariable = new MethodArgILCodeVariable(1, typeof(IReadVisitor));
}
private void GenerateDictionaryCode(ILCodeVariable dictionary, Type elementType)
{
var enumerateCode = new ILEnumerateCode(dictionary, (il, it) => {
GenerateEnumerateContentCode(new InstancePropertyILCodeVariable(it, elementType.GetProperty("Key")), LevelType.DictionaryKey);
GenerateEnumerateContentCode(new InstancePropertyILCodeVariable(it, elementType.GetProperty("Value")), LevelType.DictionaryValue);
});
_il.Generate(enumerateCode);
}
public void Increment(ILCodeVariable value, ILCodeParameter valueToAdd)
{
if (value == null) throw new ArgumentNullException("value");
if (valueToAdd == null) throw new ArgumentNullException("valueToAdd");
_il.Var.Load(value);
((IILCodeParameter) valueToAdd).Load(_il);
_il.Gen.Emit(OpCodes.Add);
_il.Var.Set(value);
}
public void Set(ILCodeVariable variable)
{
if (variable == null) throw new ArgumentNullException("variable");
((IILCodeVariable)variable).Set(_il);
}
public InstancePropertyILCodeVariable Property(ILCodeVariable instance, PropertyInfo property)
{
return new InstancePropertyILCodeVariable(instance, property);
}
public void LoadAddress(ILCodeVariable variable)
{
if (variable == null) throw new ArgumentNullException("variable");
((IILCodeVariable)variable).GetAddress(_il);
}
public InstanceFieldILCodeVariable Field(ILCodeVariable instance, FieldInfo field)
{
return new InstanceFieldILCodeVariable(instance, field);
}
public InstanceFieldILCodeVariable(ILCodeVariable instance, FieldInfo info)
: base(info.FieldType)
{
_instance = instance;
_info = info;
}
public static ILCodeParameter Of(ILCodeVariable variable)
{
return new ILCodeParameterDelegatable(variable.VariableType, il => il.Var.Load(variable), il => il.Var.LoadAddress(variable));
}
public void GetPropertyValue(ILCodeVariable instance, PropertyInfo property)
{
if (!property.CanRead) throw new InvalidOperationException("Can not get value from a property with no getter");
var getMethod = property.GetGetMethod();
InvokeMethod(instance, getMethod);
}
public void GetField(ILCodeVariable instance, FieldInfo field)
{
_il.Var.Load(instance);
_il.LoadField(field);
}
public void SetVariable(ILCodeVariable variable, ILCodeParameter valueToSet)
{
if (valueToSet == null) valueToSet = ILCodeParameter.Null;
((IILCodeParameter) valueToSet).Load(_il);
_il.Var.Set(variable);
}
public void TransferIfNull(ILCodeVariable reference, Label label)
{
_var.Load(reference);
LoadNull();
CompareEquals();
TransferLongIfTrue(label);
}
public InstancePropertyILCodeVariable(ILCodeVariable instance, PropertyInfo info)
: base(info.PropertyType)
{
_instance = instance;
_info = info;
}
private void GenerateCreateAndChildCallCode(ILCodeVariable local)
{
var type = local.VariableType;
var constructor = type.GetConstructor(Type.EmptyTypes);
if (constructor == null)
throw InvalidGraphException.NoParameterLessConstructor(type);
_il.Construct(constructor);
_il.Var.Set(local);
var childTravellerInfo = _context.GetTraveller(type);
var field = _il.Var.Field(_il.Var.This(), childTravellerInfo.Field);
_il.Snippets.InvokeMethod(field, childTravellerInfo.TravelReadMethod, _visitorVariable, local);
}
public void SetPropertyValue(ILCodeVariable instance, PropertyInfo property, ILCodeParameter value)
{
if (!property.CanWrite) throw new InvalidOperationException("Can not set value from a property with no setter");
if (value == null) value = ILCodeParameter.Null;
var setMethod = property.GetSetMethod();
InvokeMethod(instance, setMethod, value);
}
private void GeneratePropertyCode(ILCodeVariable graphVariable, SerializableProperty target)
{
var extPropertyType = target.Ext;
var argsField = _context.GetArgsField(target);
var argsFieldVariable = _il.Var.Field(_il.Var.This(), argsField);
if (target.Ext.IsValueOrNullableOfValue()) {
var valueType = target.Ext.IsEnum()
? target.Ext.GetUnderlyingEnumType()
: target.Ref.PropertyType;
var propertyParameter = _il.Var.Property(graphVariable, target.Ref).AsNullable();
_il.Snippets.InvokeMethod(_visitorVariable, Members.VisitorVisitValue[valueType], propertyParameter, argsFieldVariable);
}
else if (extPropertyType.Class == TypeClass.Dictionary) {
var container = extPropertyType.Container.AsDictionary();
var dictionaryType = container.DictionaryInterfaceType;
var cLocal = _il.DeclareLocal("dictionary", dictionaryType);
_il.Snippets.SetVariable(cLocal, _il.Var.Property(graphVariable, target.Ref).Cast(dictionaryType));
_il.Snippets.InvokeMethod(_visitorVariable, Members.VisitorVisit, cLocal, argsFieldVariable);
_il.IfNotEqual(cLocal, null)
.Then(() => GenerateDictionaryCode(cLocal, container.ElementType))
.End();
_il.Snippets.InvokeMethod(_visitorVariable, Members.VisitorLeave, cLocal, argsFieldVariable);
}
else if (extPropertyType.Class == TypeClass.Collection) {
var container = extPropertyType.Container.AsCollection();
var collectionType = extPropertyType.Ref.IsArray && extPropertyType.Container.AsArray().Ranks > 1
? extPropertyType.Ref
: container.CollectionInterfaceType;
var cLocal = _il.DeclareLocal("collection", collectionType);
_il.Snippets.SetVariable(cLocal, _il.Var.Property(graphVariable, target.Ref).Cast(collectionType));
_il.Snippets.InvokeMethod(_visitorVariable, Members.VisitorVisit, cLocal, argsFieldVariable);
_il.IfNotEqual(cLocal, null).Then(
() => GenerateEnumerateCollectionContentCode(extPropertyType, cLocal))
.End();
_il.Snippets.InvokeMethod(_visitorVariable, Members.VisitorLeave, cLocal, argsFieldVariable);
}
else {
var singleLocal = _il.DeclareLocal("single", target.Ref.PropertyType);
_il.Snippets.GetPropertyValue(graphVariable, target.Ref);
_il.Var.Set(singleLocal);
_il.Snippets.InvokeMethod(_visitorVariable, Members.VisitorVisit, singleLocal, argsFieldVariable);
var checkIfNullLabel = _il.DefineLabel();
_il.TransferIfNull(singleLocal, checkIfNullLabel);
GenerateChildCall(singleLocal);
_il.MarkLabel(checkIfNullLabel);
_il.Snippets.InvokeMethod(_visitorVariable, Members.VisitorLeave, singleLocal, argsFieldVariable);
}
}
