@GwtCompatible public abstract class ImmutableTable<R,C,V> extends Object implements Serializable
Table
whose contents will never change, with many other important properties detailed
at ImmutableCollection
.
See the Guava User Guide article on immutable collections.
Modifier and Type | Class and Description |
---|---|
static class |
ImmutableTable.Builder<R,C,V>
A builder for creating immutable table instances, especially
public static final tables
("constant tables"). |
Table.Cell<R,C,V>
Modifier and Type | Method and Description |
---|---|
static <R,C,V> ImmutableTable.Builder<R,C,V> |
builder()
Returns a new builder.
|
ImmutableSet<Table.Cell<R,C,V>> |
cellSet()
Returns a set of all row key / column key / value triplets.
|
void |
clear()
Deprecated.
Unsupported operation.
|
ImmutableMap<R,V> |
column(C columnKey)
Returns a view of all mappings that have the given column key.
|
ImmutableSet<C> |
columnKeySet()
Returns a set of column keys that have one or more values in the table.
|
abstract ImmutableMap<C,Map<R,V>> |
columnMap()
Returns a view that associates each column key with the corresponding map from row keys to
values.
|
boolean |
contains(@Nullable Object rowKey,
@Nullable Object columnKey)
Returns
true if the table contains a mapping with the specified row and column keys. |
boolean |
containsColumn(@Nullable Object columnKey)
Returns
true if the table contains a mapping with the specified column. |
boolean |
containsRow(@Nullable Object rowKey)
Returns
true if the table contains a mapping with the specified row key. |
boolean |
containsValue(@Nullable Object value)
Returns
true if the table contains a mapping with the specified value. |
static <R,C,V> ImmutableTable<R,C,V> |
copyOf(Table<? extends R,? extends C,? extends V> table)
Returns an immutable copy of the provided table.
|
boolean |
equals(@Nullable Object obj)
Indicates whether some other object is "equal to" this one.
|
V |
get(@Nullable Object rowKey,
@Nullable Object columnKey)
Returns the value corresponding to the given row and column keys, or
null if no such
mapping exists. |
int |
hashCode()
Returns a hash code value for the object.
|
boolean |
isEmpty()
Returns
true if the table contains no mappings. |
static <R,C,V> ImmutableTable<R,C,V> |
of()
Returns an empty immutable table.
|
static <R,C,V> ImmutableTable<R,C,V> |
of(R rowKey,
C columnKey,
V value)
Returns an immutable table containing a single cell.
|
V |
put(R rowKey,
C columnKey,
V value)
Deprecated.
Unsupported operation.
|
void |
putAll(Table<? extends R,? extends C,? extends V> table)
Deprecated.
Unsupported operation.
|
V |
remove(Object rowKey,
Object columnKey)
Deprecated.
Unsupported operation.
|
ImmutableMap<C,V> |
row(R rowKey)
Returns a view of all mappings that have the given row key.
|
ImmutableSet<R> |
rowKeySet()
Returns a set of row keys that have one or more values in the table.
|
abstract ImmutableMap<R,Map<C,V>> |
rowMap()
Returns a view that associates each row key with the corresponding map from column keys to
values.
|
static <T,R,C,V> Collector<T,?,ImmutableTable<R,C,V>> |
toImmutableTable(Function<? super T,? extends R> rowFunction,
Function<? super T,? extends C> columnFunction,
Function<? super T,? extends V> valueFunction)
Returns a
Collector that accumulates elements into an ImmutableTable . |
static <T,R,C,V> Collector<T,?,ImmutableTable<R,C,V>> |
toImmutableTable(Function<? super T,? extends R> rowFunction,
Function<? super T,? extends C> columnFunction,
Function<? super T,? extends V> valueFunction,
BinaryOperator<V> mergeFunction)
Returns a
Collector that accumulates elements into an ImmutableTable . |
String |
toString()
Returns the string representation
rowMap().toString() . |
ImmutableCollection<V> |
values()
Returns a collection of all values, which may contain duplicates.
|
public static <T,R,C,V> Collector<T,?,ImmutableTable<R,C,V>> toImmutableTable(Function<? super T,? extends R> rowFunction, Function<? super T,? extends C> columnFunction, Function<? super T,? extends V> valueFunction)
Collector
that accumulates elements into an ImmutableTable
. Each
input element is mapped to one cell in the returned table, with the rows, columns, and values
generated by applying the specified functions.
The returned Collector
will throw a NullPointerException
at collection time
if the row, column, or value functions return null on any input.
public static <T,R,C,V> Collector<T,?,ImmutableTable<R,C,V>> toImmutableTable(Function<? super T,? extends R> rowFunction, Function<? super T,? extends C> columnFunction, Function<? super T,? extends V> valueFunction, BinaryOperator<V> mergeFunction)
Collector
that accumulates elements into an ImmutableTable
. Each
input element is mapped to one cell in the returned table, with the rows, columns, and values
generated by applying the specified functions. If multiple inputs are mapped to the same row
and column pair, they will be combined with the specified merging function in encounter order.
The returned Collector
will throw a NullPointerException
at collection time
if the row, column, value, or merging functions return null on any input.
public static <R,C,V> ImmutableTable<R,C,V> of()
public static <R,C,V> ImmutableTable<R,C,V> of(R rowKey, C columnKey, V value)
public static <R,C,V> ImmutableTable<R,C,V> copyOf(Table<? extends R,? extends C,? extends V> table)
The Table.cellSet()
iteration order of the provided table determines the iteration
ordering of all views in the returned table. Note that some views of the original table and the
copied table may have different iteration orders. For more control over the ordering, create a
ImmutableTable.Builder
and call ImmutableTable.Builder.orderRowsBy(java.util.Comparator<? super R>)
, ImmutableTable.Builder.orderColumnsBy(java.util.Comparator<? super C>)
, and
ImmutableTable.Builder.putAll(com.google.common.collect.Table<? extends R, ? extends C, ? extends V>)
Despite the method name, this method attempts to avoid actually copying the data when it is safe to do so. The exact circumstances under which a copy will or will not be performed are undocumented and subject to change.
public static <R,C,V> ImmutableTable.Builder<R,C,V> builder()
ImmutableTable.Builder()
constructor.public ImmutableSet<Table.Cell<R,C,V>> cellSet()
Table
add
or
addAll
methods.public ImmutableCollection<V> values()
Table
public ImmutableMap<R,V> column(C columnKey)
Changes to the returned map will update the underlying table, and vice versa.
public ImmutableSet<C> columnKeySet()
Table
columnKeySet
in interface Table<R,C,V>
public abstract ImmutableMap<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 Table.column(C)
. Those maps may support setValue()
, put()
, and
putAll()
.
The value Map<R, V>
instances in the returned map are ImmutableMap
instances
as well.
public ImmutableMap<C,V> row(R rowKey)
Changes to the returned map will update the underlying table, and vice versa.
public ImmutableSet<R> rowKeySet()
Table
public abstract ImmutableMap<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 Table.row(R)
. Those maps may support setValue()
, put()
, and putAll()
.
The value Map<C, V>
instances in the returned map are ImmutableMap
instances
as well.
public boolean contains(@Nullable Object rowKey, @Nullable Object columnKey)
Table
true
if the table contains a mapping with the specified row and column keys.public boolean containsValue(@Nullable Object value)
Table
true
if the table contains a mapping with the specified value.containsValue
in interface Table<R,C,V>
value
- value to search for@Deprecated public final void clear()
@CanIgnoreReturnValue @Deprecated public final V put(R rowKey, C columnKey, V value)
put
in interface Table<R,C,V>
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 keysUnsupportedOperationException
- always@Deprecated public final void putAll(Table<? extends R,? extends C,? extends V> table)
@CanIgnoreReturnValue @Deprecated public final V remove(Object rowKey, Object columnKey)
public boolean containsRow(@Nullable Object rowKey)
Table
true
if the table contains a mapping with the specified row key.containsRow
in interface Table<R,C,V>
rowKey
- key of row to search forpublic boolean containsColumn(@Nullable Object columnKey)
Table
true
if the table contains a mapping with the specified column.containsColumn
in interface Table<R,C,V>
columnKey
- key of column to search forpublic V get(@Nullable Object rowKey, @Nullable Object columnKey)
Table
null
if no such
mapping exists.public boolean isEmpty()
Table
true
if the table contains no mappings.public boolean equals(@Nullable Object obj)
java.lang.Object
The equals
method implements an equivalence relation
on non-null object references:
x
, x.equals(x)
should return
true
.
x
and y
, x.equals(y)
should return true
if and only if
y.equals(x)
returns true
.
x
, y
, and z
, if
x.equals(y)
returns true
and
y.equals(z)
returns true
, then
x.equals(z)
should return true
.
x
and y
, multiple invocations of
x.equals(y)
consistently return true
or consistently return false
, provided no
information used in equals
comparisons on the
objects is modified.
x
,
x.equals(null)
should return false
.
The equals
method for class Object
implements
the most discriminating possible equivalence relation on objects;
that is, for any non-null reference values x
and
y
, this method returns true
if and only
if x
and y
refer to the same object
(x == y
has the value true
).
Note that it is generally necessary to override the hashCode
method whenever this method is overridden, so as to maintain the
general contract for the hashCode
method, which states
that equal objects must have equal hash codes.
public int hashCode()
java.lang.Object
HashMap
.
The general contract of hashCode
is:
hashCode
method
must consistently return the same integer, provided no information
used in equals
comparisons on the object is modified.
This integer need not remain consistent from one execution of an
application to another execution of the same application.
equals(Object)
method, then calling the hashCode
method on each of
the two objects must produce the same integer result.
Object.equals(java.lang.Object)
method, then calling the hashCode
method on each of the
two objects must produce distinct integer results. However, the
programmer should be aware that producing distinct integer results
for unequal objects may improve the performance of hash tables.
As much as is reasonably practical, the hashCode method defined by
class Object
does return distinct integers for distinct
objects. (This is typically implemented by converting the internal
address of the object into an integer, but this implementation
technique is not required by the
Java™ programming language.)
hashCode
in interface Table<R,C,V>
hashCode
in class Object
Object.equals(java.lang.Object)
,
System.identityHashCode(java.lang.Object)
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