https://github.com/lfkdsk/es-parser-proxy
es => dashbase proxy
https://github.com/lfkdsk/es-parser-proxy
dashbase dashbase-proxy-demo elasticsearch
Last synced: 4 months ago
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es => dashbase proxy
- Host: GitHub
- URL: https://github.com/lfkdsk/es-parser-proxy
- Owner: lfkdsk
- Created: 2018-01-09T15:38:59.000Z (about 8 years ago)
- Default Branch: lfkdsk/function-support-framework
- Last Pushed: 2018-02-06T12:53:42.000Z (almost 8 years ago)
- Last Synced: 2025-04-03T16:54:44.651Z (9 months ago)
- Topics: dashbase, dashbase-proxy-demo, elasticsearch
- Language: Java
- Homepage:
- Size: 619 KB
- Stars: 2
- Watchers: 2
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# EtD Proxy FrameWork
* Input：
``` json
{
"query": {
"match" : {
"kind" : "SERVER"
}
}
}
```
* Output:
``` json
{
"numResults": 10,
"tableNames": [],
"query": {
"queryStr": "kind:SERVER",
"queryType": "string"
},
"fields": [
"*"
],
"useApproximation": false,
"ctx": "",
"timeoutMillis": 0,
"disableHighlight": false
}
```
## AST 结构
``` javascript
// AstObject -> Property List
{
// => Property List
// => Primary Property => [ StringLiterial, Literial]
"bool": true,
// => Array Property => [ Literial List ] | [ AstObject List ] | [ AstValueList List ]
// => Array Property is List
"array": [
],
// => Object Property => AstObject
"object": {
}
}
```
## 语法定义
可以通过注解的方式为解析器增加语法，增加的语法是一种类似的 JSON 语法：
``` java
@Bind(name = "match_all", mode = OBJECT, prefix = "query")
public void matchAll(AstObjectProperty property, Context context) {
}
```
* `name` 表示当前添加的语法描述。
* `mode` 表示添加的语法类型，语法类型包含四种，`[ WRAPPER, OBJECT, PRIMARY, ARRAY] ` 其中 Wrapper 代表最外层对象，Object 代表添加的是一个对象类型，Primary 代表字面量类型，Array 代表数组类型。
* `prefix` 代表语法前缀，当前的 node 在哪个对象之下。
* `insert` 代表插入的语法规则，适用于递归的语法定义（目前用于嵌套的 Query Context）
### 示例 1
比如我们需要支持语法：
``` javascript
{
"query": {
"match_all": {}
}
}
```
可以编写下列的语法规则：
``` java
@Bind(name = "wrapper", mode = WRAPPER)
public void wrapper(AstQueryProgram property, Context context) {
Logger.v(" wrapper attach ");
}
@Bind(name = "query", mode = OBJECT, prefix = "wrapper")
public void query(AstObjectProperty property, Context context) {
Logger.v(" query attach ");
}
@Bind(name = "match_all", mode = OBJECT, prefix = "query")
public void matchAll(AstObjectProperty property, Context context) {
Logger.v(" match_all attach ");
}
```
打印的输出结果：
### 示例 2
这里出现了递归，`must` 后面的 Object 实际上支持 `query` 的语法：
``` javascript
{
"query": {
"bool": {
"must" : {
"term" : { "user" : "kimchy" }
},
"filter": {
"term" : { "tag" : "tech" }
},
}
}
}
```
可以编写下列的语法规则：
``` java
@Bind(name = "wrapper", mode = WRAPPER)
public void wrapper(AstQueryProgram property, Context context) {
System.out.println(" Call Wrapper ");
}
@Bind(name = "query", mode = OBJECT, prefix = "wrapper")
public void query(AstObjectProperty property, Context context) {
System.out.println(" Call Query ");
}
@Bind(name = "term", mode = OBJECT, prefix = "query")
public void term(AstObjectProperty property, Context context) {
System.out.println(" Call Term ");
}
@Bind(name = "bool", mode = OBJECT, prefix = "query")
public void bool(AstObjectProperty property, Context context) {
System.out.println(" Call Bool ");
}
@Bind(name = "must", mode = OBJECT, prefix = "bool", insert = "query")
public void must(AstObjectProperty property, Context context) {
System.out.println(property.object()
.property("term")
.valueNode()
.toString());
}
@Bind(name = "filter", mode = OBJECT, prefix = "bool", insert = "query")
public void filter(AstObjectProperty property, Context context) {
System.out.println(property.object()
.property("term")
.valueNode()
.toString());
}
```
打印的输出结果：
