JSONからJackson用Kotlin data class生成

gen-kotlin-jackson.js

function generate(obj, className, current) {
    if(!current) current = ""
    
    var keys = Object.keys(obj)
    var props = keys.map(key=>[toKotlinType(obj[key], key), key])
        .map(([className, variableName]) => {
            if (typeof obj[variableName] == "object" && !(obj[variableName] instanceof Array))
                current = travel(obj[variableName], className, current);
            else if(obj[variableName] instanceof Array)
                current = travel(obj[variableName][0], toUCC(variableName), current);
            return `@JsonProperty("${variableName}") val ${toLCC(variableName)}: ${className}`;
        }).join(",\n    ");
    return current + `data class ${className}(${props})\n`;
}

function toKotlinType(obj, name) {
    switch (typeof obj) {
    case "string":
        return "String";
    case "number":
        return (obj | 0) == obj ? "Int" : "Double";
    case "boolean":
        return "Boolean";
    default:
        if (obj instanceof Array) {
            return `List<${toUCC(name)}>`;
        }
        return toUCC(name);
    }
}

function toUCC(name) {
    return name.split("_")
        .map(flag=>flag[0].toUpperCase() + flag.substring(1))
        .join("");
}

function toLCC(name) {
    return name.split("_")
        .map((flag, index)=> (index == 0 ? flag[0].toLowerCase() : flag[0].toUpperCase())
                + flag.substring(1))
        .join("");
}

// usage: generate(JSON.parse(jsonString))