db99092334
This change implements `mapper.Encode` "for real" (that is, in a way
that isn't a complete embarrassment). It uses the obvious reflection
trickery to encode a tagged struct and its values as a JSON-like
in-memory map and collection of keyed values.
During this, I took the opportunity to also clean up a few other things
that had been bugging me. Namely, the presence of `mapper.Object` was
always error prone, since it isn't a true "typedef" in the sence that
it carries extra RTTI. Instead of doing that, let's just use the real
`map[string]interface{}` "JSON-map-like" object type. Even better, we
no longer require resource providers to deal with the mapper
infrastructure. Instead, the `Check` function can simply return an
array of errors. It's still best practice to return field-specific errors
to facilitate better diagnostics, but it's no longer required; and I've
added `resource.NewFieldError` to eliminate the need to import mapper.
As of this change, we can also consistently emit RPC structs with `lumi`
tags, rather than `lumi` tags on the way in and `json` on the way out.
This completes pulumi/lumi#183.
104 lines
3 KiB
Go
104 lines
3 KiB
Go
// Licensed to Pulumi Corporation ("Pulumi") under one or more
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// contributor license agreements. See the NOTICE file distributed with
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// this work for additional information regarding copyright ownership.
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// Pulumi licenses this file to You under the Apache License, Version 2.0
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// (the "License"); you may not use this file except in compliance with
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// the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package encoding
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import (
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"reflect"
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"github.com/pulumi/lumi/pkg/compiler/ast"
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"github.com/pulumi/lumi/pkg/util/contract"
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"github.com/pulumi/lumi/pkg/util/mapper"
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)
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func decodeModuleMember(m mapper.Mapper, obj map[string]interface{}) (ast.ModuleMember, error) {
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k, err := mapper.FieldString(obj, reflect.TypeOf((*ast.ModuleMember)(nil)).Elem(), "kind", true)
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if err != nil {
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return nil, err
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}
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if k != nil {
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kind := ast.NodeKind(*k)
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switch kind {
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case ast.ClassKind:
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return decodeClass(m, obj)
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case ast.ModulePropertyKind:
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return decodeModuleProperty(m, obj)
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case ast.ModuleMethodKind:
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return decodeModuleMethod(m, obj)
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default:
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contract.Failf("Unrecognized ModuleMember kind: %v\n", kind)
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}
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}
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return nil, nil
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}
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func decodeClass(m mapper.Mapper, obj map[string]interface{}) (*ast.Class, error) {
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var class ast.Class
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if err := m.Decode(obj, &class); err != nil {
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return nil, err
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}
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return &class, nil
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}
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func decodeClassMember(m mapper.Mapper, obj map[string]interface{}) (ast.ClassMember, error) {
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k, err := mapper.FieldString(obj, reflect.TypeOf((*ast.ClassMember)(nil)).Elem(), "kind", true)
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if err != nil {
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return nil, err
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}
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if k != nil {
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kind := ast.NodeKind(*k)
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switch kind {
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case ast.ClassPropertyKind:
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return decodeClassProperty(m, obj)
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case ast.ClassMethodKind:
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return decodeClassMethod(m, obj)
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default:
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contract.Failf("Unrecognized ClassMember kind: %v\n", kind)
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}
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}
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return nil, nil
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}
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func decodeClassProperty(m mapper.Mapper, obj map[string]interface{}) (*ast.ClassProperty, error) {
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var prop ast.ClassProperty
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if err := m.Decode(obj, &prop); err != nil {
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return nil, err
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}
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return &prop, nil
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}
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func decodeClassMethod(m mapper.Mapper, obj map[string]interface{}) (*ast.ClassMethod, error) {
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var meth ast.ClassMethod
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if err := m.Decode(obj, &meth); err != nil {
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return nil, err
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}
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return &meth, nil
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}
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func decodeModuleProperty(m mapper.Mapper, obj map[string]interface{}) (*ast.ModuleProperty, error) {
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var prop ast.ModuleProperty
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if err := m.Decode(obj, &prop); err != nil {
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return nil, err
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}
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return &prop, nil
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}
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func decodeModuleMethod(m mapper.Mapper, obj map[string]interface{}) (*ast.ModuleMethod, error) {
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var meth ast.ModuleMethod
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if err := m.Decode(obj, &meth); err != nil {
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return nil, err
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}
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return &meth, nil
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}
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