com.r3corda.node.utilities / AbstractJDBCHashSet

AbstractJDBCHashSet

abstract class AbstractJDBCHashSet<K : Any, out T : JDBCHashedTable> : MutableSet<K>, AbstractSet<K>

Base class for JDBC backed hash set that delegates to a JDBC backed hash map where the values are all Unit and not actually persisted. Iteration order is order of insertion. Iterators can remove().

See AbstractJDBCHashMap for implementation details.





Constructors

<init> AbstractJDBCHashSet(table: T, loadOnInit: Boolean = false)

Base class for JDBC backed hash set that delegates to a JDBC backed hash map where the values are all Unit and not actually persisted. Iteration order is order of insertion. Iterators can remove().

Properties

innerMap val innerMap: AbstractJDBCHashMap<K, Unit, T>
size open val size: Int
table val table: T

Functions

add open fun add(element: K): Boolean
addElementToInsert abstract fun addElementToInsert(insert: <ERROR CLASS>, entry: K, finalizables: MutableList<() -> Unit>): Unit

Implementation should marshall the element to the insert statement.
clear open fun clear(): Unit
contains open fun contains(element: K): Boolean
elementFromRow abstract fun elementFromRow(row: <ERROR CLASS>): K

Implementation should return the element object marshalled from the database table row.
isEmpty open fun isEmpty(): Boolean
iterator open fun iterator(): MutableIterator<K>
remove open fun remove(element: K): Boolean

Extension Functions

noneOrSingle fun <T> Iterable<T>.noneOrSingle(predicate: (T) -> Boolean): T?

Returns the single element matching the given predicate, or null if element was not found, or throws if more than one element was found.

fun <T> Iterable<T>.noneOrSingle(): T?

Returns single element, or null if element was not found, or throws if more than one element was found.

Inheritors

JDBCHashSet class JDBCHashSet<K : Any> : AbstractJDBCHashSet<K, BlobSetTable>

A convenient JDBC table backed hash set with iteration order based on insertion order. See AbstractJDBCHashSet and AbstractJDBCHashMap for further implementation details.