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.
242 lines
7.1 KiB
Go
242 lines
7.1 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 decodeExpression(m mapper.Mapper, obj map[string]interface{}) (ast.Expression, error) {
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k, err := mapper.FieldString(obj, reflect.TypeOf((*ast.Expression)(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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// Literals
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case ast.NullLiteralKind:
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return decodeNullLiteral(m, obj)
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case ast.BoolLiteralKind:
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return decodeBoolLiteral(m, obj)
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case ast.NumberLiteralKind:
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return decodeNumberLiteral(m, obj)
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case ast.StringLiteralKind:
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return decodeStringLiteral(m, obj)
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case ast.ArrayLiteralKind:
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return decodeArrayLiteral(m, obj)
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case ast.ObjectLiteralKind:
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return decodeObjectLiteral(m, obj)
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// Loads
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case ast.LoadLocationExpressionKind:
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return decodeLoadLocationExpression(m, obj)
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case ast.LoadDynamicExpressionKind:
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return decodeLoadDynamicExpression(m, obj)
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case ast.TryLoadDynamicExpressionKind:
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return decodeTryLoadDynamicExpression(m, obj)
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// Functions
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case ast.NewExpressionKind:
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return decodeNewExpression(m, obj)
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case ast.InvokeFunctionExpressionKind:
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return decodeInvokeFunctionExpression(m, obj)
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case ast.LambdaExpressionKind:
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return decodeLambdaExpression(m, obj)
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// Operators
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case ast.UnaryOperatorExpressionKind:
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return decodeUnaryOperatorExpression(m, obj)
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case ast.BinaryOperatorExpressionKind:
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return decodeBinaryOperatorExpression(m, obj)
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// Type testing
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case ast.CastExpressionKind:
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return decodeCastExpression(m, obj)
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case ast.IsInstExpressionKind:
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return decodeIsInstExpression(m, obj)
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case ast.TypeOfExpressionKind:
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return decodeTypeOfExpression(m, obj)
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// Miscellaneous
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case ast.ConditionalExpressionKind:
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return decodeConditionalExpression(m, obj)
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case ast.SequenceExpressionKind:
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return decodeSequenceExpression(m, obj)
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default:
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contract.Failf("Unrecognized Expression kind: %v\n%v\n", kind, obj)
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}
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}
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return nil, nil
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}
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func decodeNullLiteral(m mapper.Mapper, obj map[string]interface{}) (*ast.NullLiteral, error) {
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var lit ast.NullLiteral
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if err := m.Decode(obj, &lit); err != nil {
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return nil, err
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}
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return &lit, nil
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}
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func decodeBoolLiteral(m mapper.Mapper, obj map[string]interface{}) (*ast.BoolLiteral, error) {
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var lit ast.BoolLiteral
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if err := m.Decode(obj, &lit); err != nil {
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return nil, err
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}
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return &lit, nil
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}
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func decodeNumberLiteral(m mapper.Mapper, obj map[string]interface{}) (*ast.NumberLiteral, error) {
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var lit ast.NumberLiteral
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if err := m.Decode(obj, &lit); err != nil {
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return nil, err
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}
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return &lit, nil
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}
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func decodeStringLiteral(m mapper.Mapper, obj map[string]interface{}) (*ast.StringLiteral, error) {
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var lit ast.StringLiteral
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if err := m.Decode(obj, &lit); err != nil {
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return nil, err
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}
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return &lit, nil
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}
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func decodeArrayLiteral(m mapper.Mapper, obj map[string]interface{}) (*ast.ArrayLiteral, error) {
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var lit ast.ArrayLiteral
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if err := m.Decode(obj, &lit); err != nil {
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return nil, err
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}
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return &lit, nil
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}
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func decodeObjectLiteral(m mapper.Mapper, obj map[string]interface{}) (*ast.ObjectLiteral, error) {
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var lit ast.ObjectLiteral
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if err := m.Decode(obj, &lit); err != nil {
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return nil, err
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}
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return &lit, nil
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}
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func decodeLoadLocationExpression(m mapper.Mapper, obj map[string]interface{}) (*ast.LoadLocationExpression, error) {
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var expr ast.LoadLocationExpression
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if err := m.Decode(obj, &expr); err != nil {
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return nil, err
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}
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return &expr, nil
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}
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func decodeLoadDynamicExpression(m mapper.Mapper, obj map[string]interface{}) (*ast.LoadDynamicExpression, error) {
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var expr ast.LoadDynamicExpression
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if err := m.Decode(obj, &expr); err != nil {
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return nil, err
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}
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return &expr, nil
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}
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func decodeTryLoadDynamicExpression(m mapper.Mapper, obj map[string]interface{}) (*ast.TryLoadDynamicExpression, error) {
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var expr ast.TryLoadDynamicExpression
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if err := m.Decode(obj, &expr); err != nil {
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return nil, err
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}
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return &expr, nil
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}
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func decodeNewExpression(m mapper.Mapper, obj map[string]interface{}) (*ast.NewExpression, error) {
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var expr ast.NewExpression
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if err := m.Decode(obj, &expr); err != nil {
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return nil, err
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}
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return &expr, nil
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}
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func decodeInvokeFunctionExpression(m mapper.Mapper, obj map[string]interface{}) (*ast.InvokeFunctionExpression, error) {
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var expr ast.InvokeFunctionExpression
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if err := m.Decode(obj, &expr); err != nil {
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return nil, err
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}
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return &expr, nil
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}
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func decodeLambdaExpression(m mapper.Mapper, obj map[string]interface{}) (*ast.LambdaExpression, error) {
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var expr ast.LambdaExpression
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if err := m.Decode(obj, &expr); err != nil {
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return nil, err
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}
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return &expr, nil
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}
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func decodeUnaryOperatorExpression(m mapper.Mapper, obj map[string]interface{}) (*ast.UnaryOperatorExpression, error) {
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var expr ast.UnaryOperatorExpression
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if err := m.Decode(obj, &expr); err != nil {
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return nil, err
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}
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return &expr, nil
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}
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func decodeBinaryOperatorExpression(m mapper.Mapper, obj map[string]interface{}) (*ast.BinaryOperatorExpression, error) {
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var expr ast.BinaryOperatorExpression
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if err := m.Decode(obj, &expr); err != nil {
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return nil, err
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}
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return &expr, nil
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}
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func decodeCastExpression(m mapper.Mapper, obj map[string]interface{}) (*ast.CastExpression, error) {
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var expr ast.CastExpression
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if err := m.Decode(obj, &expr); err != nil {
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return nil, err
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}
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return &expr, nil
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}
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func decodeIsInstExpression(m mapper.Mapper, obj map[string]interface{}) (*ast.IsInstExpression, error) {
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var expr ast.IsInstExpression
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if err := m.Decode(obj, &expr); err != nil {
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return nil, err
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}
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return &expr, nil
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}
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func decodeTypeOfExpression(m mapper.Mapper, obj map[string]interface{}) (*ast.TypeOfExpression, error) {
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var expr ast.TypeOfExpression
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if err := m.Decode(obj, &expr); err != nil {
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return nil, err
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}
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return &expr, nil
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}
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func decodeConditionalExpression(m mapper.Mapper, obj map[string]interface{}) (*ast.ConditionalExpression, error) {
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var expr ast.ConditionalExpression
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if err := m.Decode(obj, &expr); err != nil {
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return nil, err
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}
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return &expr, nil
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}
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func decodeSequenceExpression(m mapper.Mapper, obj map[string]interface{}) (*ast.SequenceExpression, error) {
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var expr ast.SequenceExpression
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if err := m.Decode(obj, &expr); err != nil {
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return nil, err
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}
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return &expr, nil
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}
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