如何告诉 swagger-codegen 我的自定义生成器？

Question

我正在尝试基于现有的 JAX-RS 生成器制作一个自定义的招摇代码生成器。我按照 Swagger-Codegen GitHub 页面上的说明，使用命令 java -jar modules/swagger-codegen-cli/target/swagger-codegen-cli.jar meta -o output/myLibrary -n ABCCodegen 生成了一个模块-p com.abc.codegen。我创建了我需要的模板并更新了 AbcCodegenGenerator.java 文件。

我在尝试运行代码时遇到了问题。命令 java -cp swagger-codegen-cli.jar:ABCCodegen-swagger-codegen-1.0.0.jar io.swagger.codegen.Codegen -l ABCCodegen -o ./test 给了我错误无法找到或加载主类 io.swagger.codegen.Codegen。查看 Swagger Google Group 上的帖子后，我尝试运行命令 java -cp ABCCodegen-swagger-codegen-1.0.0.jar -jar swagger-codegen-cli.jar langs。但是，我的自定义模块 abc 没有显示在列表中。我需要在 java 类本身中以编程方式做一些事情来告诉 codegen 我的生成器吗？

这是我的课程 AbcCodegenGenerator.java：

package com.abc.codegen;



import io.swagger.codegen.*;
import io.swagger.models.Operation;
import io.swagger.codegen.languages.*;

import java.util.*;
import java.io.File;



public class AbcCodegenGenerator extends AbstractJavaJAXRSServerCodegen {
 public AbcCodegenGenerator(){
  super();

  sourceFolder = "src/main/java";
        invokerPackage = "io.swagger.api";
        artifactId = "com.abc";
        outputFolder = "generated-code/ABCCodegen";

        modelTemplateFiles.put("model.mustache", ".java"); 

        //Classes for the API
        apiTemplateFiles.put("api.mustache", ".java");
        apiTemplateFiles.put("apiService.mustache", ".java");
        apiTemplateFiles.put("apiServiceImpl.mustache", ".java");
        apiTemplateFiles.put("apiServiceFactory.mustache", ".java");
        apiPackage = "io.swagger.api";

        additionalProperties.put("title", title);

        //The location templates will be read from
        templateDir = "src/main/resources/ABCCodegen";



        //Adds ABCCodegen to the CliOptions list??
        CliOption library = new CliOption(CodegenConstants.LIBRARY, "library template (sub-template) to use");
        library.setDefault(DEFAULT_LIBRARY);

        Map<String, String> supportedLibraries = new LinkedHashMap<String, String>();
        supportedLibraries.put(DEFAULT_LIBRARY, "abc");
        library.setEnum(supportedLibraries);

        cliOptions.add(library);
        cliOptions.add(new CliOption(CodegenConstants.IMPL_FOLDER, CodegenConstants.IMPL_FOLDER_DESC));
        cliOptions.add(new CliOption("title", "a title describing the application"));
 }

 @Override
    public String getName()
    {
        return "abc"; 
    }

    @Override
    public String getHelp()
    {
        return "Generates a ABC Server application based on Jersey framework.";
    }

    @Override
    public void postProcessModelProperty(CodegenModel model, CodegenProperty property) {
        super.postProcessModelProperty(model, property);
        if("null".equals(property.example)) {
            property.example = null;
        }
    }

    @Override
    public void processOpts() {
        super.processOpts();

        if ( additionalProperties.containsKey(CodegenConstants.IMPL_FOLDER) ) {
            implFolder = (String) additionalProperties.get(CodegenConstants.IMPL_FOLDER);
        }

        supportingFiles.clear();
        writeOptional(outputFolder, new SupportingFile("pom.mustache", "", "pom.xml"));
        writeOptional(outputFolder, new SupportingFile("README.mustache", "", "README.md"));
        supportingFiles.add(new SupportingFile("ApiException.mustache", (sourceFolder + '/' + apiPackage).replace(".", "/"), "ApiException.java"));
        supportingFiles.add(new SupportingFile("ApiOriginFilter.mustache", (sourceFolder + '/' + apiPackage).replace(".", "/"), "ApiOriginFilter.java"));
        supportingFiles.add(new SupportingFile("ApiResponseMessage.mustache", (sourceFolder + '/' + apiPackage).replace(".", "/"), "ApiResponseMessage.java"));
        supportingFiles.add(new SupportingFile("NotFoundException.mustache", (sourceFolder + '/' + apiPackage).replace(".", "/"), "NotFoundException.java"));
        supportingFiles.add(new SupportingFile("jacksonJsonProvider.mustache", (sourceFolder + '/' + apiPackage).replace(".", "/"), "JacksonJsonProvider.java"));
        supportingFiles.add(new SupportingFile("BadRequestException.mustache", (sourceFolder + '/' + apiPackage).replace(".", "/"), "BadRequestException.java"));
        supportingFiles.add(new SupportingFile("JavaRestResourceUtil.mustache", (sourceFolder + '/' + apiPackage).replace(".", "/"), "JavaRestResourceUtil.java"));

        writeOptional(outputFolder, new SupportingFile("bootstrap.mustache", (implFolder + '/' + apiPackage).replace(".", "/"), "Bootstrap.java"));

        writeOptional(outputFolder, new SupportingFile("web.mustache", ("src/main/webapp/WEB-INF"), "web.xml"));
        writeOptional(outputFolder, new SupportingFile("index.mustache", ("src/main/webapp"), "index.html"));

        writeOptional(outputFolder, new SupportingFile("log4j.mustache", ("conf"), "log4j.properties"));

        writeOptional(outputFolder, new SupportingFile("logback.mustache", ("src/main/resources"), "logback.xml"));

        if ( additionalProperties.containsKey("dateLibrary") ) {
            setDateLibrary(additionalProperties.get("dateLibrary").toString());
            additionalProperties.put(dateLibrary, "true");
        }

        if ( "joda".equals(dateLibrary) ) {
            supportingFiles.add(new SupportingFile("JodaDateTimeProvider.mustache", (sourceFolder + '/' + apiPackage).replace(".", "/"), "JodaDateTimeProvider.java"));
            supportingFiles.add(new SupportingFile("JodaLocalDateProvider.mustache", (sourceFolder + '/' + apiPackage).replace(".", "/"), "JodaLocalDateProvider.java"));
        } else if ( "java8".equals(dateLibrary) ) {
            supportingFiles.add(new SupportingFile("LocalDateTimeProvider.mustache", (sourceFolder + '/' + apiPackage).replace(".", "/"), "LocalDateTimeProvider.java"));
            supportingFiles.add(new SupportingFile("LocalDateProvider.mustache", (sourceFolder + '/' + apiPackage).replace(".", "/"), "LocalDateProvider.java"));
        }
    }

    @Override
    public void addOperationToGroup(String tag, String resourcePath, Operation operation, CodegenOperation co, Map<String, List<CodegenOperation>> operations) {
        String basePath = resourcePath;
        if (basePath.startsWith("/")) {
            basePath = basePath.substring(1);
        }
        int pos = basePath.indexOf("/");
        if (pos > 0) {
            basePath = basePath.substring(0, pos);
        }

        if (basePath == "") {
            basePath = "default";
        } else {
            if (co.path.startsWith("/" + basePath)) {
                co.path = co.path.substring(("/" + basePath).length());
            }
            co.subresourceOperation = !co.path.isEmpty();
        }
        List<CodegenOperation> opList = operations.get(basePath);
        if (opList == null) {
            opList = new ArrayList<CodegenOperation>();
            operations.put(basePath, opList);
        }
        opList.add(co);
        co.baseName = basePath;
    }

    public void hideGenerationTimestamp(boolean hideGenerationTimestamp) {
        this.hideGenerationTimestamp = hideGenerationTimestamp;
    }

}

提前感谢您的帮助！

詹妮弗

Answer 1

这就是 java 加载类的方式，特别是使用 SPI（服务提供者接口）。

这里有文档：

https://github.com/swagger-api/swagger-codegen#making-your-own-codegen-modules

问题是您需要同时指定库和 codegen jar，并告诉它要运行哪个类。例如：

# assuming your library is under my-codegen/myLibrary/target

java -cp my-codegen/myLibrary/target/myClientCodegen-swagger-codegen-1.0.0.jar \
    modules/swagger-codegen-cli/target/swagger-codegen-cli.jar \
    io.swagger.codegen.SwaggerCodegen generate \
    -l com.my.company.codegen.MyclientcodegenGenerator \
    -o foo \
    -i http://petstore.swagger.io/v2/swagger.json

这会将 codegen 库添加到类路径、您的自定义模板库、执行主函数 (io.swagger.codegen.SwaggerCodegen)，并将您的类作为目标传递..