json - 使用 GO 从文件中解码 JSON 内容并使用 GO 模板包生成 .go 文件

Question

我有兴趣阅读模式(json 格式的文本文件)并将其解码为模式(为此我在 .GO 文件中定义了一些 JSON 结构)并且对于模式中的每种类型的结构，我想生成相应的 .go 文件，其中包含使用模板包 (http://golang.org/pkg/text/template/) 执行 CRUD 操作的代码，以生成这些文件。

模式文件中的结构示例 -{

type struct XYZ {
    Type         string                 `json:"type,omitempty"`
    ResourceType string                 `json:"resourceType,omitempty"`
    Links        map[string]string      `json:"links,omitempty"`

}

The text file has a JSON structured data which is something of this form -

{
        "type": "collection",
        "resourceType": "schema",
        "links": {
        "self": "…/v1/schemas",
        },
        "createTypes": { },
        "actions": { },
        "data": [ 86 items
        {
        "id": "schema",
        "type": "schema",
        "links": {
        "self": "/schemas/schema",
        "collection": "…/schemas",
        },
         ...

     }

有人可以帮助我如何使用 GO 模板包为不同结构生成这些 CRUD 操作的代码。

Answer 1

您可能会发现 go generate 很有用。

---

proposal: go generate

New go tool subcommand proposed for Go 1.4. Please see the design document and comment in this thread.

http://golang.org/s/go1.4-generate

-rob

---

Go generate: A Proposal

Introduction

The go build command automates the construction of Go programs but sometimes preliminary processing is required, processing that go build does not support. Motivating examples include:

• yacc: generating .go files from yacc grammar (.y) files
• protobufs: generating .pb.go files from protocol buffer definition (.proto) files
• Unicode: generating tables from UnicodeData.txt
• HTML: embedding .html files into Go source code
• bindata: translating binary files such as JPEGs into byte arrays in Go source

There are other processing steps one can imagine:

• string methods: generating String() string methods for types used as enumerated constants
• macros: generating customized implementations given generalized packages, such as sort.Ints from ints

This proposal offers a design for smooth automation of such processing.