org.web3j.openapi.codegen.config.VersionProvider.kt Maven / Gradle / Ivy

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/*
 * Copyright 2020 Web3 Labs Ltd.
 *
 * 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.web3j.openapi.codegen.config

import java.time.Instant
import java.time.OffsetDateTime
import java.time.ZoneOffset
import java.time.format.DateTimeFormatter
import java.util.Properties

object VersionProvider {

    val versionName: String
    val buildTimestamp: OffsetDateTime

    private val timeFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.SSS O")

    init {
        val url = javaClass.classLoader.getResource("openapi-version.properties")
            ?: throw IllegalStateException("No openapi-version.properties file found in the classpath.")

        val properties = Properties().apply { load(url.openStream()) }

        versionName = properties.getProperty("version")
        buildTimestamp = properties.getProperty("timestamp").toLong().let {
            Instant.ofEpochMilli(it).atOffset(ZoneOffset.UTC)
        }
    }

    fun getVersion(): Array {
        return arrayOf(
            "Version: $versionName",
            "Build timestamp: ${buildTimestamp.let { timeFormatter.format(it) }}"
        )
    }
}