run.qontract.core.pattern.DeferredPattern.kt Maven / Gradle / Ivy

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A Contract Testing Tool that leverages Gherkin to describe APIs in a human readable and machine enforceable manner

There is a newer version: 0.23.1

package run.qontract.core.pattern

import run.qontract.core.Resolver
import run.qontract.core.Result
import run.qontract.core.value.EmptyString
import run.qontract.core.value.Value

data class DeferredPattern(override val pattern: String, val key: String? = null) : Pattern {
    override fun equals(other: Any?): Boolean = when(other) {
        is DeferredPattern -> other.pattern == pattern
        else -> false
    }
    override fun hashCode(): Int = pattern.hashCode()

    override fun matches(sampleData: Value?, resolver: Resolver) =
            resolver.matchesPattern(key, resolver.getPattern(pattern), sampleData ?: EmptyString)

    override fun generate(resolver: Resolver) =
            when (key) {
                null -> resolver.getPattern(pattern).generate(resolver)
                else -> resolver.generate(key, resolver.getPattern(pattern))
            }

    override fun newBasedOn(row: Row, resolver: Resolver): List {
        return resolver.getPattern(pattern).newBasedOn(row, resolver)
    }

    override fun encompasses(otherPattern: Pattern, thisResolver: Resolver, otherResolver: Resolver, typeStack: TypeStack): Result {
        return thisResolver.getPattern(pattern).encompasses(resolvedHop(otherPattern, otherResolver), thisResolver, otherResolver, typeStack)
    }

    override fun listOf(valueList: List, resolver: Resolver): Value {
        return resolver.getPattern(pattern).listOf(valueList, resolver)
    }

    override val typeAlias: String? = pattern

    override fun parse(value: String, resolver: Resolver): Value =
        resolver.getPattern(pattern).parse(value, resolver)

    override val typeName: String = withoutPatternDelimiters(pattern)

    fun resolvePattern(resolver: Resolver): Pattern = when(val definedPattern = resolver.getPattern(pattern.trim())) {
        is DeferredPattern -> definedPattern.resolvePattern(resolver)
        else -> definedPattern
    }

    override fun patternSet(resolver: Resolver): List = resolvePattern(resolver).patternSet(resolver)

    override fun toString() = pattern
}

fun resolvedHop(pattern: Pattern, resolver: Resolver): Pattern {
    return when(pattern) {
        is DeferredPattern -> resolvedHop(pattern.resolvePattern(resolver), resolver)
        is LookupRowPattern -> resolvedHop(pattern.pattern, resolver)
        else -> pattern
    }
}