com.google.common.collect

Class ForwardingTable<R,C,V>

java.lang.Object

com.google.common.collect.ForwardingObject

com.google.common.collect.ForwardingTable<R,C,V>

All Implemented Interfaces:

Table<R,C,V>

@GwtCompatible
public abstract class ForwardingTable<R,C,V>
extends ForwardingObject
implements Table<R,C,V>

A table which forwards all its method calls to another table. Subclasses should override one or more methods to modify the behavior of the backing map as desired per the decorator pattern.

Since:

7.0

Author:

Gregory Kick

Nested Class Summary

Nested classes/interfaces inherited from interface com.google.common.collect.Table

Table.Cell<R,C,V>

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ForwardingTable() Constructor for use by subclasses.

Method Summary

Methods

Modifier and Type	Method and Description
Set<Table.Cell<R,C,V>>	cellSet() Returns a set of all row key / column key / value triplets.
void	clear() Removes all mappings from the table.
Map<R,V>	column(C columnKey) Returns a view of all mappings that have the given column key.
Set<C>	columnKeySet() Returns a set of column keys that have one or more values in the table.
Map<C,Map<R,V>>	columnMap() Returns a view that associates each column key with the corresponding map from row keys to values.
boolean	contains(Object rowKey, Object columnKey) Returns true if the table contains a mapping with the specified row and column keys.
boolean	containsColumn(Object columnKey) Returns true if the table contains a mapping with the specified column.
boolean	containsRow(Object rowKey) Returns true if the table contains a mapping with the specified row key.
boolean	containsValue(Object value) Returns true if the table contains a mapping with the specified value.
protected abstract Table<R,C,V>	delegate() Returns the backing delegate instance that methods are forwarded to.
boolean	equals(Object obj) Compares the specified object with this table for equality.
V	get(Object rowKey, Object columnKey) Returns the value corresponding to the given row and column keys, or null if no such mapping exists.
int	hashCode() Returns the hash code for this table.
boolean	isEmpty() Returns true if the table contains no mappings.
V	put(R rowKey, C columnKey, V value) Associates the specified value with the specified keys.
void	putAll(Table<? extends R,? extends C,? extends V> table) Copies all mappings from the specified table to this table.
V	remove(Object rowKey, Object columnKey) Removes the mapping, if any, associated with the given keys.
Map<C,V>	row(R rowKey) Returns a view of all mappings that have the given row key.
Set<R>	rowKeySet() Returns a set of row keys that have one or more values in the table.
Map<R,Map<C,V>>	rowMap() Returns a view that associates each row key with the corresponding map from column keys to values.
int	size() Returns the number of row key / column key / value mappings in the table.
Collection<V>	values() Returns a collection of all values, which may contain duplicates.

Methods inherited from class com.google.common.collect.ForwardingObject

toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ForwardingTable

protected ForwardingTable()

Constructor for use by subclasses.

Method Detail

delegate

protected abstract Table<R,C,V> delegate()

Description copied from class: ForwardingObject

Returns the backing delegate instance that methods are forwarded to. Abstract subclasses generally override this method with an abstract method that has a more specific return type, such as ForwardingSet.delegate(). Concrete subclasses override this method to supply the instance being decorated.

Specified by:

delegate in class ForwardingObject

cellSet

public Set<Table.Cell<R,C,V>> cellSet()

Description copied from interface: Table

Returns a set of all row key / column key / value triplets. Changes to the returned set will update the underlying table, and vice versa. The cell set does not support the add or addAll methods.

Specified by:

cellSet in interface Table<R,C,V>

Returns:

set of table cells consisting of row key / column key / value triplets

clear

public void clear()

Description copied from interface: Table

Removes all mappings from the table.

Specified by:

clear in interface Table<R,C,V>

column

public Map<R,V> column(C columnKey)

Description copied from interface: Table

Returns a view of all mappings that have the given column key. For each row key / column key / value mapping in the table with that column key, the returned map associates the row key with the value. If no mappings in the table have the provided column key, an empty map is returned.

Changes to the returned map will update the underlying table, and vice versa.

Specified by:

column in interface Table<R,C,V>

Parameters:

columnKey - key of column to search for in the table

Returns:

the corresponding map from row keys to values

columnKeySet

public Set<C> columnKeySet()

Description copied from interface: Table

Returns a set of column keys that have one or more values in the table. Changes to the set will update the underlying table, and vice versa.

Specified by:

columnKeySet in interface Table<R,C,V>

Returns:

set of column keys

columnMap

public Map<C,Map<R,V>> columnMap()

Description copied from interface: Table

Returns a view that associates each column key with the corresponding map from row keys to values. Changes to the returned map will update this table. The returned map does not support put() or putAll(), or setValue() on its entries.

In contrast, the maps returned by columnMap().get() have the same behavior as those returned by Table.column(C). Those maps may support setValue(), put(), and putAll().

Specified by:

columnMap in interface Table<R,C,V>

Returns:

a map view from each column key to a secondary map from row keys to values

contains

public boolean contains(Object rowKey,
               Object columnKey)

Description copied from interface: Table

Returns true if the table contains a mapping with the specified row and column keys.

Specified by:

contains in interface Table<R,C,V>

Parameters:

rowKey - key of row to search for

columnKey - key of column to search for

containsColumn

public boolean containsColumn(Object columnKey)

Description copied from interface: Table

Returns true if the table contains a mapping with the specified column.

Specified by:

containsColumn in interface Table<R,C,V>

Parameters:

columnKey - key of column to search for

containsRow

public boolean containsRow(Object rowKey)

Description copied from interface: Table

Returns true if the table contains a mapping with the specified row key.

Specified by:

containsRow in interface Table<R,C,V>

Parameters:

rowKey - key of row to search for

containsValue

public boolean containsValue(Object value)

Description copied from interface: Table

Returns true if the table contains a mapping with the specified value.

Specified by:

containsValue in interface Table<R,C,V>

Parameters:

value - value to search for

get

public V get(Object rowKey,
    Object columnKey)

Description copied from interface: Table

Returns the value corresponding to the given row and column keys, or null if no such mapping exists.

Specified by:

get in interface Table<R,C,V>

Parameters:

rowKey - key of row to search for

columnKey - key of column to search for

isEmpty

public boolean isEmpty()

Description copied from interface: Table

Returns true if the table contains no mappings.

Specified by:

isEmpty in interface Table<R,C,V>

put

public V put(R rowKey,
    C columnKey,
    V value)

Description copied from interface: Table

Associates the specified value with the specified keys. If the table already contained a mapping for those keys, the old value is replaced with the specified value.

Specified by:

put in interface Table<R,C,V>

Parameters:

rowKey - row key that the value should be associated with

columnKey - column key that the value should be associated with

value - value to be associated with the specified keys

Returns:

the value previously associated with the keys, or null if no mapping existed for the keys

putAll

public void putAll(Table<? extends R,? extends C,? extends V> table)

Description copied from interface: Table

Copies all mappings from the specified table to this table. The effect is equivalent to calling Table.put(R, C, V) with each row key / column key / value mapping in table.

Specified by:

putAll in interface Table<R,C,V>

Parameters:

table - the table to add to this table

remove

public V remove(Object rowKey,
       Object columnKey)

Description copied from interface: Table

Removes the mapping, if any, associated with the given keys.

Specified by:

remove in interface Table<R,C,V>

Parameters:

rowKey - row key of mapping to be removed

columnKey - column key of mapping to be removed

Returns:

the value previously associated with the keys, or null if no such value existed

row

public Map<C,V> row(R rowKey)

Description copied from interface: Table

Returns a view of all mappings that have the given row key. For each row key / column key / value mapping in the table with that row key, the returned map associates the column key with the value. If no mappings in the table have the provided row key, an empty map is returned.

Changes to the returned map will update the underlying table, and vice versa.

Specified by:

row in interface Table<R,C,V>

Parameters:

rowKey - key of row to search for in the table

Returns:

the corresponding map from column keys to values

rowKeySet

public Set<R> rowKeySet()

Description copied from interface: Table

Returns a set of row keys that have one or more values in the table. Changes to the set will update the underlying table, and vice versa.

Specified by:

rowKeySet in interface Table<R,C,V>

Returns:

set of row keys

rowMap

public Map<R,Map<C,V>> rowMap()

Description copied from interface: Table

Returns a view that associates each row key with the corresponding map from column keys to values. Changes to the returned map will update this table. The returned map does not support put() or putAll(), or setValue() on its entries.

In contrast, the maps returned by rowMap().get() have the same behavior as those returned by Table.row(R). Those maps may support setValue(), put(), and putAll().

Specified by:

rowMap in interface Table<R,C,V>

Returns:

a map view from each row key to a secondary map from column keys to values

size

public int size()

Description copied from interface: Table

Returns the number of row key / column key / value mappings in the table.

Specified by:

size in interface Table<R,C,V>

values

public Collection<V> values()

Description copied from interface: Table

Returns a collection of all values, which may contain duplicates. Changes to the returned collection will update the underlying table, and vice versa.

Specified by:

values in interface Table<R,C,V>

Returns:

collection of values

equals

public boolean equals(Object obj)

Description copied from interface: Table

Compares the specified object with this table for equality. Two tables are equal when their cell views, as returned by Table.cellSet(), are equal.

Specified by:

equals in interface Table<R,C,V>

Overrides:

equals in class Object

hashCode

public int hashCode()

Description copied from interface: Table

Returns the hash code for this table. The hash code of a table is defined as the hash code of its cell view, as returned by Table.cellSet().

Specified by:

hashCode in interface Table<R,C,V>

Overrides:

hashCode in class Object