com.github.jchanghong.gson.Json2kotlinclass.kt Maven / Gradle / Ivy

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package com.github.jchanghong.gson

import kotlin.reflect.full.allSuperclasses
import kotlin.reflect.full.createType

internal object Json2kotlinclass {
	fun toType(list: List>): String {
		for (clazz in list) {
			if (clazz.typeParameters.size > 0) return "List?"
		}
		try {
			val map = list.map {
				it.kotlin.allSuperclasses
					.filter { !it.java.isInterface }
					.map { it.createType(nullable = true) }
					.toSet() + setOf(it.kotlin.createType(nullable = true))
			}
			val reduce = map.reduce { acc, set -> acc.intersect(set) }
			if (reduce.size == 1) return reduce.first().toString().removePrefix("kotlin.")
			val set = reduce - Any::class.createType(nullable = true)
			if (set.size == 1) return set.first().toString().removePrefix("kotlin.")
			val first = set.last()
			return first.toString().removePrefix("kotlin.")
		} catch (e: Exception) {
			throw e
		}
	}

	fun jsonToKotlinClass(json: List): String {
		val map = json.map { it.jsonToObject>() }
		val allName = map.mapNotNull { it?.keys }.reduce { acc, set -> acc + set }

		val name2Type = allName.map { it to toType(map.mapNotNull { map -> map?.get(it)?.javaClass }) }.toMap()
		val joinToString = name2Type.entries.map { (k, v) ->
			"var $k :$v  =null"
		}.joinToString(separator = ",\n")

		return """
       data class C1($joinToString)
    """.trimIndent()
	}
}

fun main() {
	Json2kotlinclass.toType(listOf(""::class.java, Int::class.java, Double::class.java))
	Json2kotlinclass.toType(listOf(Int::class.java, Double::class.java))
	Json2kotlinclass.toType(listOf(Long::class.java, Long::class.java))
	val json = """
         {
        "devType": 1,
        "collectTime": 1598605222000,
        "msgType": 0,
        "devNo": "100086",
        "latitude": 0,
        "version": "1.0",
        "voltageLow": 0,
        "linkageDevCode": "",
        "siteNo": "",
        "vendor": "HIKVISION",
        "rfidIdentifier": "01500234024416",
        "longitude": 0
    }
    """.trimIndent()

	val json2 = """
         {
        "devType": 1,
        "collectTime": 1598605222000,
        "msgType": 0,
        "devNo": "100086",
        "latitude": 0,
        "version": "1.0",
        "voltageLow": 0,
        "linkageDevCode": "",
        "siteNo": "",
        "vendor": "HIKVISION",
        "rfidIdentifier": "01500234024416",
        "longitude": 0,
        "sub":${json}
    }
    """.trimIndent()

	val json3 = """
         {
        "devType": 1,
        "collectTime": 1598605222000,
        "msgType": 0,
        "devNo": "100086",
        "latitude": 0.0,
        "version": "1.0",
        "voltageLow": 0,
        "linkageDevCode": "",
        "siteNo": "",
        "vendor": "HIKVISION",
        "rfidIdentifier": "01500234024416",
        "longitude": 0,
        "sub":[${json}]
    }
    """.trimIndent()

	val jsonToObject = json3.jsonToObject>()
	println(JsonHelper.jsonToKotlinClass(listOf(json, json3)))
}