blocks|key|4003811|text|使用与您的规则函数f1、f2、f3...匹配的功能接口：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4003812|interface+RuleFunction+extends+Function<Rules,+Rules>+{+}|code-block|syntax|javascript|4003813|您可以编写一个类，它将应用您传递给它的任何规则组合：|4003814|public+class+RuleApplier+{
++++private+RuleFunction[]+steps;

++++public+RuleApplier(RuleFunction...+steps)+{
++++++++Objects.requireNonNull(steps);
++++++++this.steps+=+steps;
++++}

++++public+List<Map<String,+String>>+apply(List<Map<String,+String>>+listOfMap)+{
++++++++Rules+rules+=+new+Rules().getListAddresses(listOfMap);
++++++++for+(RuleFunction+step+:+steps)+{
++++++++++++rules+=+step.apply(rules);
++++++++}
++++++++return+rules.fOut();
++++}
}|4003815|在构造类时，方法引用提供了一种方便的简写方式，可用于引用要应用的规则：|4003816|List<Map<String,+String>>+listOfMap+=+dropActiveStatus(listOfMapInout);

RuleApplier+applierA+=+new+RuleApplier(Rules::f1,+Rules::f2,+Rules::f3,+Rules::f4);
List<Map<String,+String>>+listOfMapOutA+=+applierA.apply(listOfMap);

RuleApplier+applierB+=+new+RuleApplier(Rules::f5,+Rules::f6);
List<Map<String,+String>>+listOfMapOutB+=+applierB.apply(listOfMap);|4003817|entityMap^0|9|2|C|2|F|2|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]|$9|X|A|Y|B|C]|$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|11|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|12|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|13|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|14|8|@]|D|@]|E|$]]|$1|Q|3|R|5|H|7|15|8|@]|D|@]|E|$I|J]]|$1|S|3|-4|5|6|7|16|8|@]|D|@]|E|$]]]|T|$]]

With a functional interface that matches your rule functions <code>f1</code>, <code>f2</code>, <code>f3</code>...:

<pre><code>interface RuleFunction extends Function&lt;Rules, Rules&gt; { }
</code></pre>

You can write a single class that will apply whatever combination of rules you pass it:

<pre><code>public class RuleApplier {
 private RuleFunction[] steps;

 public RuleApplier(RuleFunction... steps) {
 Objects.requireNonNull(steps);
 this.steps = steps;
 }

 public List&lt;Map&lt;String, String&gt;&gt; apply(List&lt;Map&lt;String, String&gt;&gt; listOfMap) {
 Rules rules = new Rules().getListAddresses(listOfMap);
 for (RuleFunction step : steps) {
 rules = step.apply(rules);
 }
 return rules.fOut();
 }
}
</code></pre>

When you construct the class method references provide a convenient shorthand that can be used to refer to the rules to apply:

<pre><code>List&lt;Map&lt;String, String&gt;&gt; listOfMap = dropActiveStatus(listOfMapInout);

RuleApplier applierA = new RuleApplier(Rules::f1, Rules::f2, Rules::f3, Rules::f4);
List&lt;Map&lt;String, String&gt;&gt; listOfMapOutA = applierA.apply(listOfMap);

RuleApplier applierB = new RuleApplier(Rules::f5, Rules::f6);
List&lt;Map&lt;String, String&gt;&gt; listOfMapOutB = applierB.apply(listOfMap);
</code></pre>

blocks|key|4003846|text|在我看来，解决方案可以简化：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4003847|public+class+RuleApplier+{
++++private+UnaryOperator<Rules>+operator;

++++public+RuleApplier(UnaryOperator<Rules>+operator)+{
++++++++Objects.requireNonNull(operator);
++++++++this.operator+=+operator;
++++}

++++public+List<Map<String,+String>>+apply(List<Map<String,+String>>+listOfMap)+{
++++++++Rules+rules+=+new+Rules().getListAddresses(listOfMap);
++++++++return+operator.apply(rules).fOut();
++++}
}|code-block|syntax|javascript|4003848|然后是用法：|4003849|RuleApplier+applierA+=+new+RuleApplier(rules+->+rules.f1().f2().f3().f4());
List<Map<String,+String>>+listOfMapOutA+=+applierA.apply(listOfMap);|4003850|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

It looks to me, that the solution can be simplified:

<pre><code>public class RuleApplier {
 private UnaryOperator&lt;Rules&gt; operator;

 public RuleApplier(UnaryOperator&lt;Rules&gt; operator) {
 Objects.requireNonNull(operator);
 this.operator = operator;
 }

 public List&lt;Map&lt;String, String&gt;&gt; apply(List&lt;Map&lt;String, String&gt;&gt; listOfMap) {
 Rules rules = new Rules().getListAddresses(listOfMap);
 return operator.apply(rules).fOut();
 }
}
</code></pre>

And then the usage:

<pre><code>RuleApplier applierA = new RuleApplier(rules -&gt; rules.f1().f2().f3().f4());
List&lt;Map&lt;String, String&gt;&gt; listOfMapOutA = applierA.apply(listOfMap);
</code></pre>

I have a class which implements fluent interface pattern as follows:

<pre><code>Class Rules {

 private List&lt;Map&lt;String, String&gt;&gt; listOfMap;

public Rules getListAddresses(List&lt;Map&lt;String, String&gt;&gt; listAddresses) {
 listOfMap = new ArrayList&lt;&gt;(listAddresses);
 return this;
}

 public List&lt;Map&lt;String, String&gt;&gt; fOut() {
 return listOfMap;
 }

 public Rules f1() {
 listOfMap = ....;
 return this;
 }

 public Rules f2() {
 listOfMap = ....;
 return this;
 }

...
...

}
</code></pre>

I have a few classes that use chaining in the following way.

<pre><code>Class A extends Rules{

 List&lt;Map&lt;String, String&gt;&gt; listOfMap = dropActiveStatus(listOfMapInout);

 //TODO make some king of CONSTANT to function name mapping
 List&lt;Map&lt;String, String&gt;&gt; listOfMapOut = this.getListAddresses(listOfMap)
 .f1()
 .f2()
 .f3()
 .f4()
 .fOut();

....
}

Class B extends Rules{

 List&lt;Map&lt;String, String&gt;&gt; listOfMap = dropActiveStatus(listOfMapInout);

 //TODO make some king of CONSTANT to function name mapping
 List&lt;Map&lt;String, String&gt;&gt; listOfMapOut = this.getListAddresses(listOfMap)
 .f5()
 .f6()
 .fOut();

....
}
</code></pre>

I want to define a generic class instead of multiple classes A, B, C.... 

How can I enforce that? 

I wish if I could define some constants for each method call, and define the constants in order during each classes' constructor, then I can use those constants to invoke the method as per the class's specifcation.

Java generalization of chaining

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

文章

问答

视频

学习中心

腾讯云实验室

直播

竞赛

腾讯云代码分析专区

腾讯iOA零信任安全管理系统专区

腾讯云架构师技术同盟交流圈

腾讯云数据库专区

腾讯云顾问专区

腾讯云原生专区

腾讯混元专区

腾讯云TCE专区

腾讯云Lighthouse专区

腾讯云HAI专区

腾讯云Edgeone专区

腾讯云存储专区

腾讯云智能专区

腾讯轻联专区 

腾讯云开发专区

TAPD专区

腾讯轻量云游戏服专区

腾讯云最具价值专家

腾讯云架构师技术同盟

腾讯云创作之星

腾讯云开发者先锋

腾讯云代码助手

云原生构建

TAPD 敏捷项目管理

Cloud Studio

SDK中心

API中心

命令行工具

涵盖代码开发、场景应用、自动测试全流程，助你从零构建专属AI助手

一站式MCP教程库，解锁AI应用新玩法

我有一个实现流畅接口模式的类，如下所示：Class Rules { private List<Map<String, String>> listOfMap;public Rules getListAddresses(List<Map<String, String>> listAddresses) { listO...

问链接的Java泛化
EN

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问链接的Java泛化EN

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问链接的Java泛化
EN