Package com.google.common.collect

Class ForwardingTable<R extends @Nullable Object,​C extends @Nullable Object,​V extends @Nullable Object>

  • All Implemented Interfaces:
    Table<R,​C,​V>
    @GwtCompatible
public abstract class ForwardingTable<R extends @Nullable Object,​C extends @Nullable Object,​V extends @Nullable Object>
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

    • Constructor Summary

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

    • Method Summary

      All Methods Instance Methods Abstract Methods Concrete Methods 
      Modifier and Type Method 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​(@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.
      protected abstract Table<R,​C,​V> delegate()
      Returns the backing delegate instance that methods are forwarded to.
      boolean equals​(@Nullable Object obj)
      Compares the specified object with this table for equality.
      @Nullable 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 the hash code for this table.
      boolean isEmpty()
      Returns true if the table contains no mappings.
      @Nullable 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.
      @Nullable V remove​(@Nullable Object rowKey, @Nullable 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.

    • 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 extends @Nullable Object,​C extends @Nullable Object,​V extends @Nullable Object>
        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 extends @Nullable Object,​C extends @Nullable Object,​V extends @Nullable Object>

      • 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 extends @Nullable Object,​C extends @Nullable Object,​V extends @Nullable Object>
        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 extends @Nullable Object,​C extends @Nullable Object,​V extends @Nullable Object>
        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 extends @Nullable Object,​C extends @Nullable Object,​V extends @Nullable Object>
        Returns:
        a map view from each column key to a secondary map from row 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 extends @Nullable Object,​C extends @Nullable Object,​V extends @Nullable Object>
        Parameters:
        rowKey - key of row to search for
        columnKey - key of column 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 extends @Nullable Object,​C extends @Nullable Object,​V extends @Nullable Object>
        Parameters:
        columnKey - key of column to search for

      • 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 extends @Nullable Object,​C extends @Nullable Object,​V extends @Nullable Object>
        Parameters:
        rowKey - key of row 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 extends @Nullable Object,​C extends @Nullable Object,​V extends @Nullable Object>
        Parameters:
        value - value to search for

      • get

        public @Nullable 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 extends @Nullable Object,​C extends @Nullable Object,​V extends @Nullable Object>
        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 extends @Nullable Object,​C extends @Nullable Object,​V extends @Nullable Object>

      • put

        @CanIgnoreReturnValue
public @Nullable 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 extends @Nullable Object,​C extends @Nullable Object,​V extends @Nullable Object>
        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 extends @Nullable Object,​C extends @Nullable Object,​V extends @Nullable Object>
        Parameters:
        table - the table to add to this table

      • remove

        @CanIgnoreReturnValue
public @Nullable V remove​(@Nullable Object rowKey,
                          @Nullable Object columnKey)
        Description copied from interface: Table
        Removes the mapping, if any, associated with the given keys.
        Specified by:
        remove in interface Table<R extends @Nullable Object,​C extends @Nullable Object,​V extends @Nullable Object>
        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 extends @Nullable Object,​C extends @Nullable Object,​V extends @Nullable Object>
        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 extends @Nullable Object,​C extends @Nullable Object,​V extends @Nullable Object>
        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 extends @Nullable Object,​C extends @Nullable Object,​V extends @Nullable Object>
        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 extends @Nullable Object,​C extends @Nullable Object,​V extends @Nullable Object>

      • 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 extends @Nullable Object,​C extends @Nullable Object,​V extends @Nullable Object>
        Returns:
        collection of values

      • equals

        public boolean equals​(@Nullable 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 extends @Nullable Object,​C extends @Nullable Object,​V extends @Nullable Object>
        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 extends @Nullable Object,​C extends @Nullable Object,​V extends @Nullable Object>
        Overrides:
        hashCode in class Object