fun fromString()

in intellij-plugin-structure/structure-intellij/src/main/java/com/jetbrains/plugin/structure/intellij/version/IdeVersionImpl.kt [63:131]
54 lines of code
13 McCabe index (conditional complexity)

    fun fromString(version: String): IdeVersionImpl {
      if (version.isBlank()) {
        throw IllegalArgumentException("Ide-version string must not be empty")
      }

      if (BUILD_NUMBER == version || SNAPSHOT == version) {
        val fallback = fromString(FALLBACK_VERSION)
        return IdeVersionImpl("", fallback.components, isSnapshot = true)
      }

      var code = version
      val productSeparator = code.lastIndexOf('-') //some products have multiple parts, e.g. "FB-IC-143.157"
      val productCode: String
      if (productSeparator > 0) {
        productCode = code.substring(0, productSeparator)
        code = code.substring(productSeparator + 1)
      } else {
        productCode = ""
      }

      validateProductCode(version, productCode)

      val baselineVersionSeparator = code.indexOf('.')
      val baselineVersion: Int
      val buildNumber: Int

      if (baselineVersionSeparator > 0) {
        val baselineVersionString = code.substring(0, baselineVersionSeparator)
        if (baselineVersionString.trim { it <= ' ' }.isEmpty()) {
          throw IllegalArgumentException("Invalid version number: $version")
        }

        val components = code.split('.')
        val intComponentsList = ArrayList<Int>()

        var isSnapshot = false
        for (component in components) {
          val comp = parseBuildNumber(version, component)
          intComponentsList.add(comp)
          if (comp == SNAPSHOT_VALUE) {
            if (component == SNAPSHOT) isSnapshot = true
            break
          }
        }

        if (intComponentsList.size < 2) {
          throw IllegalArgumentException("Invalid version number $version: build not specified")
        }

        val intComponents = IntArray(intComponentsList.size)
        for (i in intComponentsList.indices) {
          intComponents[i] = intComponentsList[i]
        }

        return IdeVersionImpl(productCode, intComponents, isSnapshot = isSnapshot)

      } else {
        buildNumber = parseBuildNumber(version, code)

        if (buildNumber <= 2000) {
          // it's probably a baseline, not a build number
          return IdeVersionImpl(productCode, intArrayOf(buildNumber, 0))
        }

        baselineVersion = getBaseLineForHistoricBuilds(buildNumber)
        return IdeVersionImpl(productCode, intArrayOf(baselineVersion, buildNumber))
      }

    }