class FlattenedList<A> : TransformationList<A, ObservableValue<out A>>
FlattenedList flattens the passed in list of ObservableValues so that changes in individual updates to the values are reflected in the exposed list as expected.
WrappedObservableValue |
class WrappedObservableValue<A> We maintain an ObservableValue->index map. This is needed because we need the ObservableValues index in order to propagate a change and if the listener closure captures the index at the time of the call to ObservableValue.addListener it will become incorrect if the indices shift around later. |
<init> |
FlattenedList(sourceList: ObservableList<out ObservableValue<out A>>) FlattenedList flattens the passed in list of ObservableValues so that changes in individual updates to the values are reflected in the exposed list as expected. |
indexMap |
val indexMap: HashMap<WrappedObservableValue<out A>, <ERROR CLASS><Int, ChangeListener<A>>> |
size |
val size: Int |
sourceList |
val sourceList: ObservableList<out ObservableValue<out A>> |
get |
fun get(index: Int): A |
getSourceIndex |
fun getSourceIndex(index: Int): Int |
sourceChanged |
fun sourceChanged(c: Change<out ObservableValue<out A>>): Unit |
associateBy |
fun <K, A, B> ObservableList<out A>.associateBy(toKey: (A) -> K, assemble: (K, A) -> B): ObservableMap<K, B> data class Person(val height: Long) val people: ObservableList = (..) val nameToHeight: ObservableMap<String, Long> = people.associateBy(Person::name) { name, person -> person.height } fun <K, A> ObservableList<out A>.associateBy(toKey: (A) -> K): ObservableMap<K, A> val people: ObservableList = (..) val nameToPerson: ObservableMap<String, Person> = people.associateBy(Person::name) |
associateByAggregation |
fun <K : Any, A : Any, B> ObservableList<out A>.associateByAggregation(toKey: (A) -> K, assemble: (K, A) -> B): ObservableMap<K, ObservableList<B>> val people: ObservableList = (..) val heightToNames: ObservableMap<Long, ObservableList> = people.associateByAggregation(Person::height) { name, person -> person.name } fun <K : Any, A : Any> ObservableList<out A>.associateByAggregation(toKey: (A) -> K): ObservableMap<K, ObservableList<A>> val people: ObservableList = (..) val heightToPeople: ObservableMap<Long, ObservableList> = people.associateByAggregation(Person::height) |
filter |
fun <A> ObservableList<out A>.filter(predicate: ObservableValue<(A) -> Boolean>): ObservableList<A> enum class FilterCriterion { HEIGHT, NAME } val filterCriterion: ObservableValue = (..) val people: ObservableList = (..) fun filterFunction(filterCriterion: FilterCriterion): (Person) -> Boolean { .. } |
filterNotNull |
fun <A> ObservableList<out A?>.filterNotNull(): ObservableList<A> data class Dog(val owner: Person?) val dogs: ObservableList = (..) val owners: ObservableList = dogs.map(Dog::owner).filterNotNull() |
first |
fun <A> ObservableList<A>.first(): ObservableValue<A?> |
foldObservable |
fun <A, B> ObservableList<out A>.foldObservable(initial: B, folderFunction: (B, A) -> B): ObservableValue<B> val people: ObservableList = (..) val concatenatedNames = people.foldObservable("", { names, person -> names + person.name }) val concatenatedNames2 = people.map(Person::name).fold("", String::plus) |
getValueAt |
fun <A> ObservableList<A>.getValueAt(index: Int): ObservableValue<A?> |
indexOfOrThrow |
fun <T> List<T>.indexOfOrThrow(item: T): Int Returns the index of the given item or throws IllegalArgumentException if not found. |
last |
fun <A> ObservableList<A>.last(): ObservableValue<A?> |
leftOuterJoin |
fun <A : Any, B : Any, C, K : Any> ObservableList<A>.leftOuterJoin(rightTable: ObservableList<B>, leftToJoinKey: (A) -> K, rightToJoinKey: (B) -> K, assemble: (A, ObservableList<B>) -> C): ObservableList<C> data class Person(val name: String, val managerName: String) val people: ObservableList = (..) val managerEmployeeMapping: ObservableList<Pair<Person, ObservableList>> = people.leftOuterJoin(people, Person::name, Person::managerName) { manager, employees -> Pair(manager, employees) } fun <A : Any, B : Any, K : Any> ObservableList<A>.leftOuterJoin(rightTable: ObservableList<B>, leftToJoinKey: (A) -> K, rightToJoinKey: (B) -> K): ObservableMap<K, <ERROR CLASS><ObservableList<A>, ObservableList<B>>> data class Person(name: String, favouriteSpecies: Species) data class Animal(name: String, species: Species) val people: ObservableList = (..) val animals: ObservableList = (..) val peopleToFavouriteAnimals: ObservableMap<Species, Pair<ObservableList, ObservableList>> = people.leftOuterJoin(animals, Person::favouriteSpecies, Animal::species) |
map |
fun <A, B> ObservableList<out A>.map(cached: Boolean = true, function: (A) -> B): ObservableList<B> val dogs: ObservableList = (..) val dogOwners: ObservableList = dogs.map { it.owner } |
noneOrSingle |
fun <T> Iterable<T>.noneOrSingle(predicate: (T) -> Boolean): T? Returns the single element matching the given predicate, or fun <T> Iterable<T>.noneOrSingle(): T? Returns single element, or |