Clean up qualified names between implementations.

Implementations are relying more on each others' interfaces, which
allows for better code isolation and a better chance at pruning down
binaries when needed. Still plenty of TODO items left to tackle.

tools/exp/codegen/method.go

@@ -202,6 +202,12 @@ func (m Method) Call(on string, params ...jen.Code) jen.Code {
 	return jen.Id(on).Dot(m.function.name).Call(params...)
 }
 
+// On generates the Go code that determines the qualified method name on a
+// specific variable.
+func (m Method) On(on string) *jen.Statement {
+	return jen.Id(on).Dot(m.function.name)
+}
+
 // Name returns the identifier of this function.
 func (m Method) Name() string {
 	return m.function.name

tools/exp/props/funcprop.go

@@ -282,13 +282,24 @@ func (p *FunctionalPropertyGenerator) serializationFuncs() (*codegen.Method, *co
 				jen.Id(codegen.This()).Dot(p.isMethodName(i)).Call(),
 			)
 		}
-		serializeFns = serializeFns.Block(
-			jen.Return(
-				kind.SerializeFn.Clone().Call(
-					jen.Id(codegen.This()).Dot(p.getFnName(i)).Call(),
+		if kind.SerializeFn != nil {
+			// This is a value that has a function that must be
+			// called to serialize properly.
+			serializeFns = serializeFns.Block(
+				jen.Return(
+					kind.SerializeFn.Clone().Call(
+						jen.Id(codegen.This()).Dot(p.getFnName(i)).Call(),
+					),
 				),
-			),
-		)
+			)
+		} else {
+			// This is a type with a Serialize method.
+			serializeFns = serializeFns.Block(
+				jen.Return(
+					jen.Id(codegen.This()).Dot(p.getFnName(i)).Call().Dot(serializeMethodName).Call(),
+				),
+			)
+		}
 	}
 	serialize := codegen.NewCommentedValueMethod(
 		p.Package.Path(),

tools/exp/props/manager.go

@@ -57,7 +57,8 @@ type ManagerGenerator struct {
 // managedMethods caches the specific methods and interfaces mapped to specific
 // properties and types.
 type managedMethods struct {
-	deserializor       *codegen.Method
+	deserializor *codegen.Method
+	// TODO: Delete these?
 	publicDeserializor *codegen.Method
 	// Interface for a manager
 	mIface *codegen.Interface
@@ -203,6 +204,7 @@ func (m *ManagerGenerator) PrivateManager() *codegen.Struct {
 func (m *ManagerGenerator) createPrivateDeserializationMethodForType(tg *TypeGenerator) *codegen.Method {
 	dn := tg.deserializationFnName()
 	pkg := m.pm.PrivatePackage()
+	// TODO: Better naming scheme from package name
 	name := fmt.Sprintf("%s%s%s", dn, tg.PrivatePackage().Name(), strings.Title(pkg.Name()))
 	return codegen.NewCommentedValueMethod(
 		pkg.Path(),
@@ -233,6 +235,7 @@ func (m *ManagerGenerator) createPrivateDeserializationMethodForType(tg *TypeGen
 func (m *ManagerGenerator) createPrivateDeserializationMethodForFuncProperty(fp *FunctionalPropertyGenerator) *codegen.Method {
 	dn := fp.DeserializeFnName()
 	pkg := m.pm.PrivatePackage()
+	// TODO: Better naming scheme from package name
 	name := fmt.Sprintf("%s%s%s", dn, fp.Package.Name(), strings.Title(pkg.Name()))
 	return codegen.NewCommentedValueMethod(
 		pkg.Path(),
@@ -263,6 +266,7 @@ func (m *ManagerGenerator) createPrivateDeserializationMethodForFuncProperty(fp
 func (m *ManagerGenerator) createPrivateDeserializationMethodForNonFuncProperty(nfp *NonFunctionalPropertyGenerator) *codegen.Method {
 	dn := nfp.DeserializeFnName()
 	pkg := m.pm.PrivatePackage()
+	// TODO: Better naming scheme from package name
 	name := fmt.Sprintf("%s%s%s", dn, nfp.Package.Name(), strings.Title(pkg.Name()))
 	return codegen.NewCommentedValueMethod(
 		pkg.Path(),

tools/exp/props/nonfuncprop.go

@@ -156,15 +156,21 @@ func (p *NonFunctionalPropertyGenerator) funcs() []*codegen.Method {
 		if i > 0 {
 			less.Else()
 		}
+		// LessFn is nil case -- call Less method directly on the LHS.
+		lessCall := jen.Id("lhs").Dot(lessMethod).Call(jen.Id("rhs"))
+		if kind.LessFn != nil {
+			// LessFn is indeed a function -- call this function
+			lessCall = kind.LessFn.Clone().Call(
+				jen.Id("lhs"),
+				jen.Id("rhs"),
+			)
+		}
 		less.If(
 			jen.Id("idx1").Op("==").Lit(i),
 		).Block(
 			jen.Id("lhs").Op(":=").Id(codegen.This()).Index(jen.Id("i")).Dot(p.getFnName(i)).Call(),
 			jen.Id("rhs").Op(":=").Id(codegen.This()).Index(jen.Id("j")).Dot(p.getFnName(i)).Call(),
-			jen.Return(kind.LessFn.Clone().Call(
-				jen.Id("lhs"),
-				jen.Id("rhs"),
-			)),
+			jen.Return(lessCall),
 		)
 	}
 	// Remove Method

tools/exp/props/property.go

@@ -62,13 +62,15 @@ type Identifier struct {
 // Only represents values and other types.
 type Kind struct {
 	Name Identifier
-	// ConcreteKind is expected to be a jen.Qual
+	// ConcreteKind is expected to be properly qualified.
 	ConcreteKind *jen.Statement
 	Nilable      bool
-	// These functions are expected to be a jen.Qual
-	SerializeFn   *jen.Statement
+	// Expected to always be non-nil: a function is needed to deserialize.
 	DeserializeFn *jen.Statement
-	LessFn        *jen.Statement
+	// If any of these are nil at generation time, assume to call the method
+	// on the object directly (instead of a qualified function).
+	SerializeFn *jen.Statement
+	LessFn      *jen.Statement
 }
 
 // PropertyGenerator is a common base struct used in both Functional and
@@ -100,16 +102,14 @@ func (p *PropertyGenerator) GetPackage() Package {
 // The name parameter must match the LowerName of an Identifier.
 //
 // This feels very hacky.
-func (p *PropertyGenerator) SetKindFns(name string, qualKind, ser, deser, less *jen.Statement) error {
+func (p *PropertyGenerator) SetKindFns(name string, qualKind, deser *jen.Statement) error {
 	for i, kind := range p.Kinds {
 		if kind.Name.LowerName == name {
 			if kind.SerializeFn != nil || kind.DeserializeFn != nil || kind.LessFn != nil {
 				return fmt.Errorf("property kind already has serialization functions set for %q", name)
 			}
 			kind.ConcreteKind = qualKind
-			kind.SerializeFn = ser
 			kind.DeserializeFn = deser
-			kind.LessFn = less
 			p.Kinds[i] = kind
 			return nil
 		}

tools/exp/props/type.go

@@ -9,9 +9,6 @@ import (
 	"sync"
 )
 
-// TODO: Prevent circular dependency by somehow abstracting the requisite
-// functions between props and types.
-
 const (
 	typeInterfaceName   = "Type"
 	extendedByMethod    = "IsExtendedBy"
@@ -21,7 +18,7 @@ const (
 	typeNameMethod      = "Name"
 	serializeMethodName = "Serialize"
 	deserializeFnName   = "Deserialize"
-	lessFnName          = "Less"
+	typeLessMethod      = "LessThan"
 )
 
 // TypeInterface returns the Type Interface that is needed for ActivityStream
@@ -45,7 +42,7 @@ type Property interface {
 	GetPackage() Package
 	PropertyName() string
 	StructName() string
-	SetKindFns(name string, kind, ser, deser, less *jen.Statement) error
+	SetKindFns(name string, kind, deser *jen.Statement) error
 	DeserializeFnName() string
 }
 
@@ -128,13 +125,12 @@ func NewTypeGenerator(pm *PackageManager, typeName, comment string,
 func (t *TypeGenerator) apply(m *ManagerGenerator) error {
 	t.m = m
 	// Set up Kind functions
-	// TODO: Call serialize on an object instead of using a function.
-	ser := jen.Qual(t.PrivatePackage().Path(), t.serializationFnName())
-	deser := jen.Qual(m.privatePackage().Path(), m.getPrivateDeserializationMethodForType(t).Name())
-	less := jen.Qual(t.PrivatePackage().Path(), t.lessFnName())
+	// Note: this "i" must be the same as the "i" in the deserialization definition.
+	// TODO: Remove this kluge.
+	deser := m.getPrivateDeserializationMethodForType(t).On(managerInitName())
 	kind := jen.Qual(t.PublicPackage().Path(), t.InterfaceName())
 	for _, p := range t.rangeProperties {
-		if e := p.SetKindFns(t.TypeName(), kind, ser, deser, less); e != nil {
+		if e := p.SetKindFns(t.TypeName(), kind, deser); e != nil {
 			return e
 		}
 	}
@@ -220,17 +216,6 @@ func (t *TypeGenerator) deserializationFnName() string {
 	return fmt.Sprintf("%s%s", deserializeFnName, t.TypeName())
 }
 
-// serializationFnName determines the name of the serialize function for this
-// type.
-func (t *TypeGenerator) serializationFnName() string {
-	return fmt.Sprintf("%s%s", serializeMethodName, t.TypeName())
-}
-
-// lessFnName determines the name of the less function for this type.
-func (t *TypeGenerator) lessFnName() string {
-	return fmt.Sprintf("%s%s", lessFnName, t.TypeName())
-}
-
 // toInterface creates the interface version of the definition generated.
 //
 // Requires apply to have already been called.
@@ -254,8 +239,9 @@ func (t *TypeGenerator) InterfaceDefinition(pkg Package) *codegen.Interface {
 func (t *TypeGenerator) Definition() *codegen.Struct {
 	t.cacheOnce.Do(func() {
 		members := t.members()
-		m := t.serializationMethod()
-		ser, deser, less := t.kindSerializationFuncs()
+		ser := t.serializationMethod()
+		less := t.lessMethod()
+		deser := t.kindDeserializationFunc()
 		extendsFn, extendsMethod := t.extendsDefinition()
 		t.cachedStruct = codegen.NewStruct(
 			jen.Commentf(t.Comments()),
@@ -263,15 +249,14 @@ func (t *TypeGenerator) Definition() *codegen.Struct {
 			[]*codegen.Method{
 				t.nameDefinition(),
 				extendsMethod,
-				m,
+				ser,
+				less,
 			},
 			[]*codegen.Function{
 				t.extendedByDefinition(),
 				extendsFn,
 				t.disjointWithDefinition(),
-				ser,
 				deser,
-				less,
 			},
 			members)
 	})
@@ -322,6 +307,7 @@ func (t *TypeGenerator) members() (members []jen.Code) {
 	// Convert to jen.Code
 	members = make([]jen.Code, 0, len(p))
 	for _, property := range sortedMembers {
+		// TODO: Use interface instead
 		members = append(members, jen.Id(strings.Title(property.PropertyName())).Qual(property.GetPackage().Path(), property.StructName()))
 	}
 	return
@@ -508,20 +494,27 @@ func (t *TypeGenerator) serializationMethod() (ser *codegen.Method) {
 	return
 }
 
-// kindSerializationFuncs returns free function references that can be used to
-// treat a TypeGenerator as another property's Kind.
-func (t *TypeGenerator) kindSerializationFuncs() (ser, deser, less *codegen.Function) {
-	ser = codegen.NewCommentedFunction(
+// lessMethod returns the method needed to compare a type with another type.
+func (t *TypeGenerator) lessMethod() (less *codegen.Method) {
+	less = codegen.NewCommentedValueMethod(
 		t.PrivatePackage().Path(),
-		t.serializationFnName(),
-		[]jen.Code{jen.Id("s").Id(t.TypeName())},
-		[]jen.Code{jen.Interface(), jen.Error()},
+		typeLessMethod,
+		t.TypeName(),
 		[]jen.Code{
-			jen.Return(
-				jen.Id("s").Dot(serializeMethodName).Call(),
-			),
+			jen.Id("o").Op("*").Id(t.TypeName()),
 		},
-		jen.Commentf("%s calls %s on the %s type.", t.serializationFnName(), serializeMethodName, t.TypeName()))
+		[]jen.Code{jen.Bool()},
+		[]jen.Code{
+			// TODO
+			jen.Commentf("TODO: Less code for %s", t.TypeName()),
+		},
+		jen.Commentf("%s computes if this %s is lesser, with an arbitrary but stable determination", typeLessMethod, t.TypeName()))
+	return
+}
+
+// kindDeserializationFunc returns free function reference that can be used to
+// treat a TypeGenerator as another property's Kind.
+func (t *TypeGenerator) kindDeserializationFunc() (deser *codegen.Function) {
 	deserCode := jen.Empty()
 	for name, prop := range t.allProperties() {
 		deserMethod := t.m.getPrivateDeserializationMethodForProperty(prop)
@@ -550,18 +543,5 @@ func (t *TypeGenerator) kindSerializationFuncs() (ser, deser, less *codegen.Func
 			jen.Return(jen.Id(codegen.This()), jen.Nil()),
 		},
 		jen.Commentf("%s creates a %s from a map representation that has been unmarshalled from a text or binary format.", t.deserializationFnName(), t.TypeName()))
-	less = codegen.NewCommentedFunction(
-		t.PrivatePackage().Path(),
-		t.lessFnName(),
-		[]jen.Code{
-			jen.Id("i"),
-			jen.Id("j").Op("*").Id(t.TypeName()),
-		},
-		[]jen.Code{jen.Bool()},
-		[]jen.Code{
-			// TODO
-			jen.Commentf("TODO: Less code for %s", t.TypeName()),
-		},
-		jen.Commentf("%s computes which %s is lesser, with an arbitrary but stable determination", t.lessFnName(), t.TypeName()))
 	return
 }