org.apache.flink.table.runtime.operators.window.state

类 WindowMapState<W,UV>

java.lang.Object

org.apache.flink.table.runtime.operators.window.state.WindowMapState<W,UV>

所有已实现的接口:

WindowState<W>

public final class WindowMapState<W,UV>
extends Object
implements WindowState<W>

A wrapper of MapState which is easier to update based on window namespace.

构造器概要

构造器

构造器和说明
WindowMapState(org.apache.flink.runtime.state.internal.InternalMapState<org.apache.flink.table.data.RowData,W,org.apache.flink.table.data.RowData,UV> windowState)

方法概要

限定符和类型	方法和说明
void	clear(W window) Removes the value mapped under current key and the given window.
boolean	contains(W window, org.apache.flink.table.data.RowData key) Returns whether there exists the given mapping.
Iterable<Map.Entry<org.apache.flink.table.data.RowData,UV>>	entries(W window) Returns all the mappings in the state.
UV	get(W window, org.apache.flink.table.data.RowData key) Returns the current value associated with the given key.
boolean	isEmpty(W window) Returns true if this state contains no key-value mappings, otherwise false.
Iterator<Map.Entry<org.apache.flink.table.data.RowData,UV>>	iterator(W window) Iterates over all the mappings in the state.
Iterable<org.apache.flink.table.data.RowData>	keys(W window) Returns all the keys in the state.
void	put(W window, org.apache.flink.table.data.RowData key, UV value) Associates a new value with the given key.
void	putAll(W window, Map<org.apache.flink.table.data.RowData,UV> map) Copies all of the mappings from the given map into the state.
void	remove(W window, org.apache.flink.table.data.RowData key) Deletes the mapping of the given key.
Iterable<UV>	values(W window) Returns all the values in the state.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

WindowMapState

public WindowMapState(org.apache.flink.runtime.state.internal.InternalMapState<org.apache.flink.table.data.RowData,W,org.apache.flink.table.data.RowData,UV> windowState)

方法详细资料

clear

public void clear(W window)

从接口复制的说明: WindowState

Removes the value mapped under current key and the given window.

指定者:

clear 在接口中 WindowState<W>

get

public UV get(W window,
              org.apache.flink.table.data.RowData key)
       throws Exception

Returns the current value associated with the given key.

参数:

key - The key of the mapping

返回:

The value of the mapping with the given key

抛出:

Exception - Thrown if the system cannot access the state.

put

public void put(W window,
                org.apache.flink.table.data.RowData key,
                UV value)
         throws Exception

Associates a new value with the given key.

参数:

key - The key of the mapping

value - The new value of the mapping

抛出:

Exception - Thrown if the system cannot access the state.

putAll

public void putAll(W window,
                   Map<org.apache.flink.table.data.RowData,UV> map)
            throws Exception

Copies all of the mappings from the given map into the state.

参数:

map - The mappings to be stored in this state

抛出:

Exception - Thrown if the system cannot access the state.

remove

public void remove(W window,
                   org.apache.flink.table.data.RowData key)
            throws Exception

Deletes the mapping of the given key.

参数:

key - The key of the mapping

抛出:

Exception - Thrown if the system cannot access the state.

contains

public boolean contains(W window,
                        org.apache.flink.table.data.RowData key)
                 throws Exception

Returns whether there exists the given mapping.

参数:

key - The key of the mapping

返回:

True if there exists a mapping whose key equals to the given key

抛出:

Exception - Thrown if the system cannot access the state.

entries

public Iterable<Map.Entry<org.apache.flink.table.data.RowData,UV>> entries(W window)
                                                                    throws Exception

Returns all the mappings in the state.

返回:

An iterable view of all the key-value pairs in the state.

抛出:

Exception - Thrown if the system cannot access the state.

keys

public Iterable<org.apache.flink.table.data.RowData> keys(W window)
                                                   throws Exception

Returns all the keys in the state.

返回:

An iterable view of all the keys in the state.

抛出:

Exception - Thrown if the system cannot access the state.

values

public Iterable<UV> values(W window)
                    throws Exception

Returns all the values in the state.

返回:

An iterable view of all the values in the state.

抛出:

Exception - Thrown if the system cannot access the state.

iterator

public Iterator<Map.Entry<org.apache.flink.table.data.RowData,UV>> iterator(W window)
                                                                     throws Exception

Iterates over all the mappings in the state.

返回:

An iterator over all the mappings in the state

抛出:

Exception - Thrown if the system cannot access the state.

isEmpty

public boolean isEmpty(W window)
                throws Exception

Returns true if this state contains no key-value mappings, otherwise false.

返回:

True if this state contains no key-value mappings, otherwise false.

抛出:

Exception - Thrown if the system cannot access the state.