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Minor: add more javadoc

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This commit is contained in:
Mike Hearn 2017-05-17 19:45:55 +02:00
parent 3636f137b0
commit 07e01388d2
1 changed files with 2 additions and 1 deletions
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core/src/main/kotlin/net/corda/core/contracts/ContractsDSL.kt
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@ -93,13 +93,14 @@ inline fun <reified T : CommandData> Collection<AuthenticatedObject<CommandData>
filter { if (parties == null) true else it.signingParties.containsAll(parties) }.
map { AuthenticatedObject(it.signers, it.signingParties, it.value as T) }
/** Ensures that a transaction has only one command that is of the given type, otherwise throws an exception. */
inline fun <reified T : CommandData> Collection<AuthenticatedObject<CommandData>>.requireSingleCommand() = try {
select<T>().single()
} catch (e: NoSuchElementException) {
throw IllegalStateException("Required ${T::class.qualifiedName} command") // Better error message.
}
// For Java
/** Ensures that a transaction has only one command that is of the given type, otherwise throws an exception. */
fun <C : CommandData> Collection<AuthenticatedObject<CommandData>>.requireSingleCommand(klass: Class<C>) =
mapNotNull { @Suppress("UNCHECKED_CAST") if (klass.isInstance(it.value)) it as AuthenticatedObject<C> else null }.single()