Jet internal refactor.

internal/jet/dialect.go

@@ -0,0 +1,72 @@
+package jet
+
+type Dialect interface {
+	Name() string
+	PackageName() string
+	SerializeOverride(operator string) SerializeOverride
+	AliasQuoteChar() byte
+	IdentifierQuoteChar() byte
+	ArgumentPlaceholder() QueryPlaceholderFunc
+}
+
+type SerializeFunc func(statement StatementType, out *SqlBuilder, options ...SerializeOption) error
+type SerializeOverride func(expressions ...Expression) SerializeFunc
+
+type QueryPlaceholderFunc func(ord int) string
+type UpdateAssigmentFunc func(columns []Column, values []Serializer, out *SqlBuilder) (err error)
+
+type DialectParams struct {
+	Name                string
+	PackageName         string
+	SerializeOverrides  map[string]SerializeOverride
+	AliasQuoteChar      byte
+	IdentifierQuoteChar byte
+	ArgumentPlaceholder QueryPlaceholderFunc
+}
+
+func NewDialect(params DialectParams) Dialect {
+	return &dialectImpl{
+		name:                params.Name,
+		packageName:         params.PackageName,
+		serializeOverrides:  params.SerializeOverrides,
+		aliasQuoteChar:      params.AliasQuoteChar,
+		identifierQuoteChar: params.IdentifierQuoteChar,
+		argumentPlaceholder: params.ArgumentPlaceholder,
+	}
+}
+
+type dialectImpl struct {
+	name                string
+	packageName         string
+	serializeOverrides  map[string]SerializeOverride
+	aliasQuoteChar      byte
+	identifierQuoteChar byte
+	argumentPlaceholder QueryPlaceholderFunc
+	setClause           UpdateAssigmentFunc
+
+	supportsReturning bool
+}
+
+func (d *dialectImpl) Name() string {
+	return d.name
+}
+
+func (d *dialectImpl) PackageName() string {
+	return d.packageName
+}
+
+func (d *dialectImpl) SerializeOverride(operator string) SerializeOverride {
+	return d.serializeOverrides[operator]
+}
+
+func (d *dialectImpl) AliasQuoteChar() byte {
+	return d.aliasQuoteChar
+}
+
+func (d *dialectImpl) IdentifierQuoteChar() byte {
+	return d.identifierQuoteChar
+}
+
+func (d *dialectImpl) ArgumentPlaceholder() QueryPlaceholderFunc {
+	return d.argumentPlaceholder
+}