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/*
 * Copyright 2018 OpenAPI-Generator Contributors (https://openapi-generator.tech)
 * Copyright 2018 SmartBear Software
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.openapitools.codegen.languages;

import io.swagger.v3.oas.models.Operation;
import org.apache.commons.lang3.BooleanUtils;
import org.apache.commons.lang3.StringUtils;
import org.openapitools.codegen.*;
import org.openapitools.codegen.config.GeneratorProperties;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.*;

import static org.openapitools.codegen.utils.StringUtils.camelize;


public class JavaInflectorServerCodegen extends AbstractJavaCodegen {

    private static final Logger LOGGER = LoggerFactory.getLogger(JavaInflectorServerCodegen.class);

    protected String title = "OpenAPI Inflector";
    protected String implFolder = "src/main/java";

    public JavaInflectorServerCodegen() {
        super();

        sourceFolder = "src/gen/java";
        apiTestTemplateFiles.clear(); // TODO: add test template
        embeddedTemplateDir = templateDir = "JavaInflector";
        invokerPackage = "org.openapitools.controllers";
        artifactId = "openapi-inflector-server";
        dateLibrary = "legacy"; //TODO: add joda support

        // clear model and api doc template as this codegen
        // does not support auto-generated markdown doc at the moment
        //TODO: add doc templates
        modelDocTemplateFiles.remove("model_doc.mustache");
        apiDocTemplateFiles.remove("api_doc.mustache");


        apiPackage = GeneratorProperties.getProperty("swagger.codegen.inflector.apipackage", "org.openapitools.controllers");
        modelPackage = GeneratorProperties.getProperty("swagger.codegen.inflector.modelpackage", "org.openapitools.model");

        additionalProperties.put("title", title);
        // java inflector uses the jackson lib
        additionalProperties.put("jackson", "true");
    }

    @Override
    public CodegenType getTag() {
        return CodegenType.SERVER;
    }

    @Override
    public String getName() {
        return "java-inflector";
    }

    @Override
    public String getHelp() {
        return "Generates a Java Inflector Server application.";
    }

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

        writeOptional(outputFolder, new SupportingFile("pom.mustache", "", "pom.xml"));
        writeOptional(outputFolder, new SupportingFile("README.mustache", "", "README.md"));
        writeOptional(outputFolder, new SupportingFile("web.mustache", "src/main/webapp/WEB-INF", "web.xml"));
        writeOptional(outputFolder, new SupportingFile("inflector.mustache", "", "inflector.yaml"));
        supportingFiles.add(new SupportingFile("openapi.mustache",
                "src/main/openapi",
                "openapi.yaml")
        );
        supportingFiles.add(new SupportingFile("StringUtil.mustache",
                (sourceFolder + '/' + invokerPackage).replace(".", "/"), "StringUtil.java"));
    }

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

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

    @Override
    public Map postProcessOperationsWithModels(Map objs, List allModels) {
        Map operations = (Map) objs.get("operations");
        if (operations != null) {
            List ops = (List) operations.get("operation");
            for (CodegenOperation operation : ops) {
                if (operation.returnType == null) {
                    operation.returnType = "Void";
                } else if (operation.returnType.startsWith("List")) {
                    String rt = operation.returnType;
                    int end = rt.lastIndexOf(">");
                    if (end > 0) {
                        operation.returnType = rt.substring("List<".length(), end);
                        operation.returnContainer = "List";
                    }
                } else if (operation.returnType.startsWith("Map")) {
                    String rt = operation.returnType;
                    int end = rt.lastIndexOf(">");
                    if (end > 0) {
                        operation.returnType = rt.substring("Map<".length(), end);
                        operation.returnContainer = "Map";
                    }
                } else if (operation.returnType.startsWith("Set")) {
                    String rt = operation.returnType;
                    int end = rt.lastIndexOf(">");
                    if (end > 0) {
                        operation.returnType = rt.substring("Set<".length(), end);
                        operation.returnContainer = "Set";
                    }
                }
            }
        }
        return objs;
    }

    @Override
    public void postProcessModelProperty(CodegenModel model, CodegenProperty property) {
        super.postProcessModelProperty(model, property);

        //Add imports for Jackson
        if (!BooleanUtils.toBoolean(model.isEnum)) {
            model.imports.add("JsonProperty");

            if (BooleanUtils.toBoolean(model.hasEnums)) {
                model.imports.add("JsonValue");
            }
        }
    }

    @Override
    public Map postProcessModelsEnum(Map objs) {
        objs = super.postProcessModelsEnum(objs);

        //Add imports for Jackson
        List> imports = (List>) objs.get("imports");
        List models = (List) objs.get("models");
        for (Object _mo : models) {
            Map mo = (Map) _mo;
            CodegenModel cm = (CodegenModel) mo.get("model");
            // for enum model
            if (Boolean.TRUE.equals(cm.isEnum) && cm.allowableValues != null) {
                cm.imports.add(importMapping.get("JsonValue"));
                Map item = new HashMap();
                item.put("import", importMapping.get("JsonValue"));
                imports.add(item);
            }
        }

        return objs;
    }

    @Override
    protected String getOrGenerateOperationId(Operation operation, String path, String httpMethod) {
        return super.getOrGenerateOperationId(operation, path, httpMethod.toUpperCase(Locale.ROOT));
    }

    public String apiFilename(String templateName, String tag) {
        String result = super.apiFilename(templateName, tag);

        if (templateName.endsWith("api.mustache")) {
            int ix = result.indexOf(sourceFolder);
            String beg = result.substring(0, ix);
            String end = result.substring(ix + sourceFolder.length());
            new java.io.File(beg + implFolder).mkdirs();
            result = beg + implFolder + end;
        }
        return result;
    }

    @Override
    public Map postProcessSupportingFileData(Map objs) {
        generateYAMLSpecFile(objs);
        return super.postProcessSupportingFileData(objs);
    }

    @Override
    public String toApiName(String name) {
        if (name.length() == 0) {
            return "DefaultController";
        }
        name = name.replaceAll("[^a-zA-Z0-9]+", "_");
        return camelize(name) + "Controller";
    }
}
 















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