R
- the type of the table row keysC
- the type of the table column keysV
- the type of the mapped valuespublic interface Table<R,C,V>
The mappings corresponding to a given row key may be viewed as a Map
whose keys are the columns. The reverse is also available, associating a
column with a row key / value map. Note that, in some implementations, data
access by column key may have fewer supported operations or worse performance
than data access by row key.
The methods returning collections or maps always return views of the underlying table. Updating the table can change the contents of those collections, and updating the collections will change the table.
All methods that modify the table are optional, and the views returned by
the table may or may not be modifiable. When modification isn't supported,
those methods will throw an UnsupportedOperationException
.
See the Guava User Guide article on
Table
.
Modifier and Type | Interface and Description |
---|---|
static interface |
Table.Cell<R,C,V>
Row key / column key / value triplet corresponding to a mapping in a table.
|
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. |
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.
|
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.
|
boolean contains(Object rowKey, Object columnKey)
true
if the table contains a mapping with the specified
row and column keys.rowKey
- key of row to search forcolumnKey
- key of column to search forboolean containsRow(Object rowKey)
true
if the table contains a mapping with the specified
row key.rowKey
- key of row to search forboolean containsColumn(Object columnKey)
true
if the table contains a mapping with the specified
column.columnKey
- key of column to search forboolean containsValue(Object value)
true
if the table contains a mapping with the specified
value.value
- value to search forV get(Object rowKey, Object columnKey)
null
if no such mapping exists.rowKey
- key of row to search forcolumnKey
- key of column to search forint size()
boolean equals(Object obj)
cellSet()
, are equal.int hashCode()
cellSet()
.void clear()
V put(R rowKey, C columnKey, V value)
rowKey
- row key that the value should be associated withcolumnKey
- column key that the value should be associated withvalue
- value to be associated with the specified keysnull
if
no mapping existed for the keysvoid putAll(Table<? extends R,? extends C,? extends V> table)
put(R, C, V)
with each row key / column key / value
mapping in table
.table
- the table to add to this tableV remove(Object rowKey, Object columnKey)
rowKey
- row key of mapping to be removedcolumnKey
- column key of mapping to be removednull
if
no such value existedMap<C,V> row(R rowKey)
Changes to the returned map will update the underlying table, and vice versa.
rowKey
- key of row to search for in the tableMap<R,V> column(C columnKey)
Changes to the returned map will update the underlying table, and vice versa.
columnKey
- key of column to search for in the tableSet<Table.Cell<R,C,V>> cellSet()
add
or addAll
methods.Set<R> rowKeySet()
Set<C> columnKeySet()
Map<R,Map<C,V>> rowMap()
put()
or putAll()
, or
setValue()
on its entries.
In contrast, the maps returned by rowMap().get()
have the same
behavior as those returned by row(R)
. Those maps may support setValue()
, put()
, and putAll()
.
Map<C,Map<R,V>> columnMap()
put()
or putAll()
,
or setValue()
on its entries.
In contrast, the maps returned by columnMap().get()
have the
same behavior as those returned by column(C)
. Those maps may support
setValue()
, put()
, and putAll()
.
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