net.corda.node.utilities / JDBCHashMap

# JDBCHashMap

`class JDBCHashMap<K : Any, V : Any> : AbstractJDBCHashMap<K, V, BlobMapTable>`

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

In this subclass, keys and values are represented by Blobs of Kryo serialized forms of the key and value objects. If you can extend AbstractJDBCHashMap and implement less Kryo dependent key and/or value mappings then that is likely preferrable.

### Types

BlobMapTable | `class BlobMapTable : JDBCHashedTable`

### Constructors

<init> | `JDBCHashMap(tableName: String, loadOnInit: Boolean = false, maxBuckets: Int = 256)` A convenient JDBC table backed hash map with iteration order based on insertion order. See AbstractJDBCHashMap for further implementation details.

### Inherited Properties

entries | `open val entries: MutableSet<MutableEntry<K, V>>`
keys | `open val keys: MutableSet<K>`
loadOnInit | `val loadOnInit: Boolean`
maxBuckets | `val maxBuckets: Int`
size | `open val size: Int`
table | `val table: T`
values | `open val values: MutableCollection<V>`

### Functions

addKeyToInsert | `fun addKeyToInsert(insert: <ERROR CLASS>, entry: Entry<K, V>, finalizables: MutableList<() -> Unit>): Unit` Implementation should marshall the key to the insert statement.
addValueToInsert | `fun addValueToInsert(insert: <ERROR CLASS>, entry: Entry<K, V>, finalizables: MutableList<() -> Unit>): Unit` Implementation should marshall the value to the insert statement.
keyFromRow | `fun keyFromRow(row: <ERROR CLASS>): K` Implementation should return the key object marshalled from the database table row.
valueFromRow | `fun valueFromRow(row: <ERROR CLASS>): V` Implementation should return the value object marshalled from the database table row.

### Inherited Functions

clear | `open fun clear(): Unit`
isEmpty | `open fun isEmpty(): Boolean`