我试图了解// Recursively create a tree of elements with attributes and children
const partition = xs => xs.reduce(
([lastPart, ...parts], x) => {
switch(getType(x)) {
case Element:
return [
Element(x),
...(lastPart ? [lastPart] : []),
...parts
];
case Array:
const attrsUntil = x.findIndex(Attribute.isNoAttribute);
const attrs = attrsUntil !== -1
? x.slice(0, attrsUntil)
: x;
const children = attrsUntil === -1
? []
: x.slice(attrsUntil);
return [ Element(
lastPart.tagName,
attrs.map(Attribute.fromString),
partition(children)
), ...parts];
default:
return [ lastPart, ...parts ];
}
},
[]
).reverse()
const getType = x =>
Array.isArray(x) ? Array
: Attribute.isAttribute(x) ? Attribute
: Element;
// Some utility models & methods:
const Attribute = (key, value) =>
({ key, value });
Attribute.isAttribute = (str) =>
str.charAt && str.charAt(0) === "#";
Attribute.isNoAttribute = x => !Attribute.isAttribute(x);
Attribute.fromString = str => Attribute(
...str.split("#").slice(1)
);
const Element = (tagName, attributes = [], children = []) =>
({ tagName, attributes, children });
let example_arr =
[
"backend",
[
"#host#www.example.com",
"#port#80"
],
"endpoints",
[
"endpoint",
[
"#external#/foo/bar/cat/mom/",
"#internal#/banana/",
"params",
[
"param",
[
"#sourceValue#acis.usermove.md"
]
]
],
]
];
console.log(
partition(example_arr)
);库中的// The formatted tree:
const input = [{tagName:"backend",attributes:[{key:"host",value:"www.example.com"},{key:"port",value:"80"}],children:[]},{tagName:"endpoints",attributes:[],children:[{tagName:"endpoint",attributes:[{key:"external",value:"/foo/bar/cat/mom/"},{key:"internal",value:"/banana/"}],children:[{tagName:"params",attributes:[],children:[{tagName:"param",attributes:[{key:"sourceValue",value:"acis.usermove.md"}],children:[]}]}]}]}];
// A helper to prefix with an indentation
const indented = (n, str) => `${" ".repeat(n)}${str}`;
// This renders a self closing tag
const renderEmptyEl = (el, indent) => indented(
indent,
`<${el.tagName} ${renderAttributes(el)} />`
);
// This renders a tag that has children
const renderParentEl = (el, indent) => [
indented(indent, `<${el.tagName} ${renderAttributes(el)}>`),
...el.children.map(c => renderEl(c, indent + 2)),
indented(indent, `</${el.tagName}>`)
].join("\n");
const renderEl = (el, indent) => el.children.length
? renderParentEl(el, indent) : renderEmptyEl(el, indent);
// Render the attribute values
const renderAttributes = ({ attributes }) => attributes
.map(({ key, value }) => `${key}="${value}"`)
.join(" ");
// Entry point for an array of nodes not inside another Element
const renderTree = (nodes) =>
nodes.map(n => renderEl(n, 0)).join("\n");
console.log(renderTree(input));与JerseyServletModule库中的jersey-guice之间的区别。
答案 0 :(得分：0)
TL; DR-JerseyServletModule已死。过去（在泽西岛为期1天）允许您使用泽西岛和吉斯，并让他们发挥出色。这不再简单了。
ServletModule是Guice模块，它允许您使用Guice配置servlet，servlet映射，过滤器和过滤器映射（以及其他功能），以及将对象注入到servlet中。创建一个从ServletModule继承的类，并重写configureServlets方法，如下所示：
class MyModule extends ServletModule {
@Override
protected void configureServlets() {
serve("/hello").with(HelloAppEngine.class);
}
}
使用Guice和ServletModule构建Web服务的文档为here。
Jersey是JSR 370的实现，即所谓的JAX-RS API，用于创建休息服务。它允许您仅使用带注释的类来构建rest服务-例如：
@Path("/user")
public class UserController {
UserPersistService userPersistService;
ObjectMapper objectMapper;
UserController(UserPersistService userPersistService, ObjectMapper objectMapper) {
this.userPersistService = userPersistService;
this.objectMapper = objectMapper;
}
@GET
@Produces(MediaType.APPLICATION_JSON)
public String getUsersAsJSON() throws IOException {
final List<User> users = userPersistService.getUsers();
return objectMapper.writeValueAsString(users);
}
}
在泽西岛1.0的过去，重写JerseyServletModule而不是Servlet Module可以使您同时执行这两个操作，因此上述类可能变为：
@Singleton
@Path("/user")
public class UserController {
@Inject
UserPersistService userPersistService;
@Inject
ObjectMapper objectMapper;
@GET
@Produces(MediaType.APPLICATION_JSON)
public String getUsersAsJSON() throws IOException {
final List<User> users = userPersistService.getUsers();
return objectMapper.writeValueAsString(users);
}
但是，正如我在开头提到的那样，在Jersey 2.0中没有等效的JerseyServletModule。您的选择是配置HK-Guice桥并继续使用Jersey，或使用RestEasy（这是替代JAX-RS实现，可以很好地与guice配合使用）。