fun checkCardinality()

in dnq-transient-store/src/main/kotlin/com/jetbrains/teamsys/dnq/database/ConstraintsUtil.kt [37:56]

• 17 lines of code
• 4 McCabe index (conditional complexity)

    fun checkCardinality(e: TransientEntity, md: AssociationEndMetaData): Boolean {
        val cardinality = md.cardinality
        if (cardinality == AssociationEndCardinality._0_n) return true

        val links = e.persistentEntity.getLinks(md.name)

        val iter = links.iterator()
        var size = 0
        while (size < 2 && iter.hasNext()) {
            iter.next()
            size++
        }

        return when (cardinality) {
            AssociationEndCardinality._0_1 -> size <= 1
            AssociationEndCardinality._1 -> size == 1
            AssociationEndCardinality._1_n -> size >= 1
            else -> throw IllegalArgumentException("Unknown cardinality [$cardinality]")
        }
    }