Add framework schema interface (#668)

internal/fwschema/fwxschema/attribute_default.go

@@ -0,0 +1,78 @@
+package fwxschema
+
+import (
+	"github.com/hashicorp/terraform-plugin-framework/internal/fwschema"
+	"github.com/hashicorp/terraform-plugin-framework/resource/schema/defaults"
+)
+
+// AttributeWithBoolDefaultValue is an optional interface on Attribute which
+// enables Bool default value support.
+type AttributeWithBoolDefaultValue interface {
+	fwschema.Attribute
+
+	DefaultValue() defaults.Bool
+}
+
+// AttributeWithFloat64DefaultValue is an optional interface on Attribute which
+// enables Float64 default value support.
+type AttributeWithFloat64DefaultValue interface {
+	fwschema.Attribute
+
+	DefaultValue() defaults.Float64
+}
+
+// AttributeWithInt64DefaultValue is an optional interface on Attribute which
+// enables Int64 default value support.
+type AttributeWithInt64DefaultValue interface {
+	fwschema.Attribute
+
+	DefaultValue() defaults.Int64
+}
+
+// AttributeWithListDefaultValue is an optional interface on Attribute which
+// enables List default value support.
+type AttributeWithListDefaultValue interface {
+	fwschema.Attribute
+
+	DefaultValue() defaults.List
+}
+
+// AttributeWithMapDefaultValue is an optional interface on Attribute which
+// enables Map default value support.
+type AttributeWithMapDefaultValue interface {
+	fwschema.Attribute
+
+	DefaultValue() defaults.Map
+}
+
+// AttributeWithNumberDefaultValue is an optional interface on Attribute which
+// enables Number default value support.
+type AttributeWithNumberDefaultValue interface {
+	fwschema.Attribute
+
+	DefaultValue() defaults.Number
+}
+
+// AttributeWithObjectDefaultValue is an optional interface on Attribute which
+// enables Object default value support.
+type AttributeWithObjectDefaultValue interface {
+	fwschema.Attribute
+
+	DefaultValue() defaults.Object
+}
+
+// AttributeWithSetDefaultValue is an optional interface on Attribute which
+// enables Set default value support.
+type AttributeWithSetDefaultValue interface {
+	fwschema.Attribute
+
+	DefaultValue() defaults.Set
+}
+
+// AttributeWithStringDefaultValue is an optional interface on Attribute which
+// enables String default value support.
+type AttributeWithStringDefaultValue interface {
+	fwschema.Attribute
+
+	DefaultValue() defaults.String
+}