ObjectLongMap

Artifact: androidx.collection:collection

Added in 1.4.0

Kotlin |Java

Cmn
```
sealed class ObjectLongMap<K : Any?>
```

Known direct subclasses

MutableObjectLongMap

MutableObjectLongMap is a container with a MutableMap-like interface for keys with reference types and Long primitives for values.

ObjectLongMap is a container with a Map-like interface for keys with reference types and Long primitives for values.

The underlying implementation is designed to avoid allocations from boxing, and insertion, removal, retrieval, and iteration operations. Allocations may still happen on insertion when the underlying storage needs to grow to accommodate newly added entries to the table. In addition, this implementation minimizes memory usage by avoiding the use of separate objects to hold key/value pairs.

This implementation makes no guarantee as to the order of the keys and values stored, nor does it make guarantees that the order remains constant over time.

This implementation is not thread-safe: if multiple threads access this container concurrently, and one or more threads modify the structure of the map (insertion or removal for instance), the calling code must provide the appropriate synchronization. Multiple threads are safe to read from this map concurrently if no write is happening.

This implementation is read-only and only allows data to be queried. A mutable implementation is provided by MutableObjectLongMap.

See also
`MutableObjectLongMap`
`ScatterMap`

Summary

Protected constructors
`<K : Any?> ObjectLongMap()`	Cmn

Public functions
`inline Boolean`	`all(predicate: (K, Long) -> Boolean)` Returns true if all entries match the given `predicate`.	Cmn
`Boolean`	`any()` Returns `true` if this map has at least one entry.	Cmn
`inline Boolean`	`any(predicate: (K, Long) -> Boolean)` Returns true if at least one entry matches the given `predicate`.	Cmn
`operator Boolean`	`contains(key: K)` Returns true if the specified `key` is present in this hash map, false otherwise.	Cmn
`Boolean`	`containsKey(key: K)` Returns true if the specified `key` is present in this hash map, false otherwise.	Cmn
`Boolean`	`containsValue(value: Long)` Returns true if the specified `value` is present in this hash map, false otherwise.	Cmn
`Int`	`count()` Returns the number of entries in this map.	Cmn
`inline Int`	`count(predicate: (K, Long) -> Boolean)` Returns the number of entries matching the given `predicate`.	Cmn
`open operator Boolean`	`equals(other: Any?)` Compares the specified object `other` with this hash map for equality.	Cmn
`inline Unit`	`forEach(block: (key, value: Long) -> Unit)` Iterates over every key/value pair stored in this map by invoking the specified `block` lambda.	Cmn
`inline Unit`	`forEachKey(block: (key) -> Unit)` Iterates over every key stored in this map by invoking the specified `block` lambda.	Cmn
`inline Unit`	`forEachValue(block: (value: Long) -> Unit)` Iterates over every value stored in this map by invoking the specified `block` lambda.	Cmn
`operator Long`	`get(key: K)` Returns the value corresponding to the given `key`, or `null` if such a key is not present in the map.	Cmn
`Long`	`getOrDefault(key: K, defaultValue: Long)` Returns the value to which the specified `key` is mapped, or `defaultValue` if this map contains no mapping for the key.	Cmn
`inline Long`	`getOrElse(key: K, defaultValue: () -> Long)` Returns the value for the given `key` if the value is present and not null.	Cmn
`open Int`	`hashCode()` Returns the hash code value for this map.	Cmn
`Boolean`	`isEmpty()` Indicates whether this map is empty.	Cmn
`Boolean`	`isNotEmpty()` Returns `true` if this map is not empty.	Cmn
`String`	`joinToString( separator: CharSequence, prefix: CharSequence, postfix: CharSequence, limit: Int, truncated: CharSequence )` Creates a String from the entries, separated by `separator` and using `prefix` before and `postfix` after, if supplied.	Cmn
`inline String`	`joinToString( separator: CharSequence, prefix: CharSequence, postfix: CharSequence, limit: Int, truncated: CharSequence, crossinline transform: (key, value: Long) -> CharSequence )` Creates a String from the entries, separated by `separator` and using `prefix` before and `postfix` after, if supplied.	Cmn
`Boolean`	`none()` Returns `true` if this map has no entries.	Cmn
`open String`	`toString()` Returns a string representation of this map.	Cmn

Public properties
`Int`	`capacity` Returns the number of key-value pairs that can be stored in this map without requiring internal storage reallocation.	Cmn
`Int`	`size` Returns the number of key-value pairs in this map.	Cmn

Protected constructors

ObjectLongMap

Cmn

protected <K : Any?> ObjectLongMap()

Public functions

all

Cmn

Added in 1.4.0

inline fun all(predicate: (K, Long) -> Boolean): Boolean

Returns true if all entries match the given predicate.

any

Cmn

Added in 1.4.0

fun any(): Boolean

Returns true if this map has at least one entry.

any

Cmn

Added in 1.4.0

inline fun any(predicate: (K, Long) -> Boolean): Boolean

Returns true if at least one entry matches the given predicate.

contains

Cmn

Added in 1.4.0

operator fun contains(key: K): Boolean

Returns true if the specified key is present in this hash map, false otherwise.

containsKey

Cmn

Added in 1.4.0

fun containsKey(key: K): Boolean

Returns true if the specified key is present in this hash map, false otherwise.

containsValue

Cmn

Added in 1.4.0

fun containsValue(value: Long): Boolean

Returns true if the specified value is present in this hash map, false otherwise.

count

Cmn

Added in 1.4.0

fun count(): Int

Returns the number of entries in this map.

count

Cmn

Added in 1.4.0

inline fun count(predicate: (K, Long) -> Boolean): Int

Returns the number of entries matching the given predicate.

equals

Cmn

open operator fun equals(other: Any?): Boolean

Compares the specified object other with this hash map for equality. The two objects are considered equal if other:

Is a ObjectLongMap
Has the same size as this map
Contains key/value pairs equal to this map's pair

forEach

Cmn

Added in 1.4.0

inline fun forEach(block: (key, value: Long) -> Unit): Unit

Iterates over every key/value pair stored in this map by invoking the specified block lambda.

forEachKey

Cmn

Added in 1.4.0

inline fun forEachKey(block: (key) -> Unit): Unit

Iterates over every key stored in this map by invoking the specified block lambda.

forEachValue

Cmn

Added in 1.4.0

inline fun forEachValue(block: (value: Long) -> Unit): Unit

Iterates over every value stored in this map by invoking the specified block lambda.

get

Cmn

Added in 1.4.0

operator fun get(key: K): Long

Returns the value corresponding to the given key, or null if such a key is not present in the map.

Throws
`kotlin.NoSuchElementException`	when `key` is not found

getOrDefault

Cmn

Added in 1.4.0

fun getOrDefault(key: K, defaultValue: Long): Long

Returns the value to which the specified key is mapped, or defaultValue if this map contains no mapping for the key.

getOrElse

Cmn

Added in 1.4.0

inline fun getOrElse(key: K, defaultValue: () -> Long): Long

Returns the value for the given key if the value is present and not null. Otherwise, returns the result of the defaultValue function.

hashCode

Cmn

open fun hashCode(): Int

Returns the hash code value for this map. The hash code the sum of the hash codes of each key/value pair.

isEmpty

Cmn

Added in 1.4.0

fun isEmpty(): Boolean

Indicates whether this map is empty.

isNotEmpty

Cmn

Added in 1.4.0

fun isNotEmpty(): Boolean

Returns true if this map is not empty.

joinToString

Cmn

Added in 1.4.0

fun joinToString(
    separator: CharSequence = ", ",
    prefix: CharSequence = "",
    postfix: CharSequence = "",
    limit: Int = -1,
    truncated: CharSequence = "..."
): String

Creates a String from the entries, separated by separator and using prefix before and postfix after, if supplied.

When a non-negative value of limit is provided, a maximum of limit items are used to generate the string. If the collection holds more than limit items, the string is terminated with truncated.

joinToString

Cmn

inline fun joinToString(
    separator: CharSequence = ", ",
    prefix: CharSequence = "",
    postfix: CharSequence = "",
    limit: Int = -1,
    truncated: CharSequence = "...",
    crossinline transform: (key, value: Long) -> CharSequence
): String

Creates a String from the entries, separated by separator and using prefix before and postfix after, if supplied. Each entry is created with transform.

none

Cmn

Added in 1.4.0

fun none(): Boolean

Returns true if this map has no entries.

toString

Cmn

open fun toString(): String

Returns a string representation of this map. The map is denoted in the string by the {}. Each key/value pair present in the map is represented inside '{}by a substring of the form key=value, and pairs are separated by , `.

Public properties

capacity

Cmn

Added in 1.4.0

val capacity: Int

Returns the number of key-value pairs that can be stored in this map without requiring internal storage reallocation.

size

Cmn

Added in 1.4.0

val size: Int

Returns the number of key-value pairs in this map.