Class ImmutableTable<R,​C,​V>

    • Method Detail

      • toImmutableTable

        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)
        Returns a 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.

        Since:
        21.0
      • toImmutableTable

        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)
        Returns a 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.

        Since:
        21.0
      • of

        public static <R,​C,​V> ImmutableTable<R,​C,​V> of()
        Returns an empty immutable table.

        Performance note: the instance returned is a singleton.

      • of

        public static <R,​C,​V> ImmutableTable<R,​C,​V> of​(R rowKey,
                                                                               C columnKey,
                                                                               V value)
        Returns an immutable table containing a single cell.
      • cellSet

        public ImmutableSet<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
      • values

        public ImmutableCollection<Vvalues()
        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
      • column

        public ImmutableMap<R,​Vcolumn​(C columnKey)
        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
        Throws:
        NullPointerException - if columnKey is null
      • columnKeySet

        public ImmutableSet<CcolumnKeySet()
        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 abstract ImmutableMap<C,​Map<R,​V>> columnMap()
        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().

        The value Map<R, V> instances in the returned map are ImmutableMap instances as well.

        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
      • row

        public ImmutableMap<C,​Vrow​(R rowKey)
        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
        Throws:
        NullPointerException - if rowKey is null
      • rowKeySet

        public ImmutableSet<RrowKeySet()
        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 abstract ImmutableMap<R,​Map<C,​V>> rowMap()
        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().

        The value Map<C, V> instances in the returned map are ImmutableMap instances as well.

        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
      • contains

        public boolean contains​(@Nullable Object rowKey,
                                @Nullable 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
      • containsValue

        public boolean containsValue​(@Nullable 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
      • put

        @CanIgnoreReturnValue
        @Deprecated
        public final V put​(R rowKey,
                           C columnKey,
                           V value)
        Deprecated.
        Unsupported operation.
        Guaranteed to throw an exception and leave the table unmodified.
        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
        Throws:
        UnsupportedOperationException - always
      • putAll

        @Deprecated
        public final void putAll​(Table<? extends R,​? extends C,​? extends V> table)
        Deprecated.
        Unsupported operation.
        Guaranteed to throw an exception and leave the table unmodified.
        Specified by:
        putAll in interface Table<R,​C,​V>
        Parameters:
        table - the table to add to this table
        Throws:
        UnsupportedOperationException - always
      • remove

        @CanIgnoreReturnValue
        @Deprecated
        public final V remove​(Object rowKey,
                              Object columnKey)
        Deprecated.
        Unsupported operation.
        Guaranteed to throw an exception and leave the table unmodified.
        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
        Throws:
        UnsupportedOperationException - always
      • containsRow

        public boolean containsRow​(@Nullable 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
      • containsColumn

        public boolean containsColumn​(@Nullable 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
      • get

        public V get​(@Nullable Object rowKey,
                     @Nullable 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>
      • equals

        public boolean equals​(@Nullable Object obj)
        Description copied from class: java.lang.Object
        Indicates whether some other object is "equal to" this one.

        The equals method implements an equivalence relation on non-null object references:

        • It is reflexive: for any non-null reference value x, x.equals(x) should return true.
        • It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
        • It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
        • It is consistent: for any non-null reference values 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.
        • For any non-null reference value 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.

        Specified by:
        equals in interface Table<R,​C,​V>
        Overrides:
        equals in class Object
        Parameters:
        obj - the reference object with which to compare.
        Returns:
        true if this object is the same as the obj argument; false otherwise.
        See Also:
        Object.hashCode(), HashMap
      • hashCode

        public int hashCode()
        Description copied from class: java.lang.Object
        Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided by HashMap.

        The general contract of hashCode is:

        • Whenever it is invoked on the same object more than once during an execution of a Java application, the 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.
        • If two objects are equal according to the equals(Object) method, then calling the hashCode method on each of the two objects must produce the same integer result.
        • It is not required that if two objects are unequal according to the 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. (The hashCode may or may not be implemented as some function of an object's memory address at some point in time.)

        Specified by:
        hashCode in interface Table<R,​C,​V>
        Overrides:
        hashCode in class Object
        Returns:
        a hash code value for this object.
        See Also:
        Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)
      • toString

        public String toString()
        Returns the string representation rowMap().toString().
        Overrides:
        toString in class Object
        Returns:
        a string representation of the object.