smithy4s.schema.PartiallyAppliedUnion.scala Maven / Gradle / Ivy
/*
* Copyright 2021-2024 Disney Streaming
*
* Licensed under the Tomorrow Open Source Technology License, Version 1.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://disneystreaming.github.io/TOST-1.0.txt
*
* 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 smithy4s.schema
import smithy4s.Hints
final class PartiallyAppliedUnion[U](val alts: Vector[Alt[U, _]])
extends AnyVal {
def apply(f: U => Int): Schema.UnionSchema[U] =
Schema.UnionSchema(Schema.placeholder, Hints.empty, alts, f)
/**
* A convenience method to build union schemas easily. It shouldn't be
* used in real usecases.
*/
def reflective: Schema.UnionSchema[U] = {
def ordinal(u: U) = {
var i = -1
var found = false
while ((i < alts.size) && !found) {
i += 1
found = alts(i).project.isDefinedAt(u)
}
if (found) i
else throw new scala.MatchError(u)
}
Schema.UnionSchema(
Schema.placeholder,
Hints.empty,
alts,
ordinal
)
}
}