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/**
* Copyright 2014 Paul Querna
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package ffjsoninception
import (
"errors"
"fmt"
"github.com/pquerna/ffjson/shared"
"io/ioutil"
"os"
"reflect"
"sort"
)
type Inception struct {
objs []*StructInfo
InputPath string
OutputPath string
PackageName string
PackagePath string
OutputImports map[string]bool
OutputFuncs []string
q ConditionalWrite
ResetFields bool
}
func NewInception(inputPath string, packageName string, outputPath string, resetFields bool) *Inception {
return &Inception{
objs: make([]*StructInfo, 0),
InputPath: inputPath,
OutputPath: outputPath,
PackageName: packageName,
OutputFuncs: make([]string, 0),
OutputImports: make(map[string]bool),
ResetFields: resetFields,
}
}
func (i *Inception) AddMany(objs []shared.InceptionType) {
for _, obj := range objs {
i.Add(obj)
}
}
func (i *Inception) Add(obj shared.InceptionType) {
i.objs = append(i.objs, NewStructInfo(obj))
i.PackagePath = i.objs[0].Typ.PkgPath()
}
func (i *Inception) wantUnmarshal(si *StructInfo) bool {
if si.Options.SkipDecoder {
return false
}
typ := si.Typ
umlx := typ.Implements(unmarshalFasterType) || reflect.PtrTo(typ).Implements(unmarshalFasterType)
umlstd := typ.Implements(unmarshalerType) || reflect.PtrTo(typ).Implements(unmarshalerType)
if umlstd && !umlx {
// structure has UnmarshalJSON, but not our faster version -- skip it.
return false
}
return true
}
func (i *Inception) wantMarshal(si *StructInfo) bool {
if si.Options.SkipEncoder {
return false
}
typ := si.Typ
mlx := typ.Implements(marshalerFasterType) || reflect.PtrTo(typ).Implements(marshalerFasterType)
mlstd := typ.Implements(marshalerType) || reflect.PtrTo(typ).Implements(marshalerType)
if mlstd && !mlx {
// structure has MarshalJSON, but not our faster version -- skip it.
return false
}
return true
}
type sortedStructs []*StructInfo
func (p sortedStructs) Len() int { return len(p) }
func (p sortedStructs) Less(i, j int) bool { return p[i].Name < p[j].Name }
func (p sortedStructs) Swap(i, j int) { p[i], p[j] = p[j], p[i] }
func (p sortedStructs) Sort() { sort.Sort(p) }
func (i *Inception) generateCode() error {
// We sort the structs by name, so output if predictable.
sorted := sortedStructs(i.objs)
sorted.Sort()
for _, si := range sorted {
if i.wantMarshal(si) {
err := CreateMarshalJSON(i, si)
if err != nil {
return err
}
}
if i.wantUnmarshal(si) {
err := CreateUnmarshalJSON(i, si)
if err != nil {
return err
}
}
}
return nil
}
func (i *Inception) handleError(err error) {
fmt.Fprintf(os.Stderr, "Error: %s:\n\n", err)
os.Exit(1)
}
func (i *Inception) Execute() {
if len(os.Args) != 1 {
i.handleError(errors.New(fmt.Sprintf("Internal ffjson error: inception executable takes no args: %v", os.Args)))
return
}
err := i.generateCode()
if err != nil {
i.handleError(err)
return
}
data, err := RenderTemplate(i)
if err != nil {
i.handleError(err)
return
}
stat, err := os.Stat(i.InputPath)
if err != nil {
i.handleError(err)
return
}
err = ioutil.WriteFile(i.OutputPath, data, stat.Mode())
if err != nil {
i.handleError(err)
return
}
}
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