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Minor: add docs for the cash DSL extensions

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Mike Hearn 2015-12-03 11:07:25 +00:00
parent 0e34779fce
commit 2193dced0a
1 changed files with 5 additions and 0 deletions
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5
src/main/kotlin/contracts/Cash.kt
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@ -234,8 +234,13 @@ class Cash : Contract {
}
// Small DSL extensions.
/** Sums the cash states in the list that are owned by the given key, throwing an exception if there are none. */
fun Iterable<ContractState>.sumCashBy(owner: PublicKey) = filterIsInstance<Cash.State>().filter { it.owner == owner }.map { it.amount }.sumOrThrow()
/** Sums the cash states in the list, throwing an exception if there are none. */
fun Iterable<ContractState>.sumCash() = filterIsInstance<Cash.State>().map { it.amount }.sumOrThrow()
/** Sums the cash states in the list, returning null if there are none. */
fun Iterable<ContractState>.sumCashOrNull() = filterIsInstance<Cash.State>().map { it.amount }.sumOrNull()
/** Sums the cash states in the list, returning zero of the given currency if there are none. */
fun Iterable<ContractState>.sumCashOrZero(currency: Currency) = filterIsInstance<Cash.State>().map { it.amount }.sumOrZero(currency)