/* ===========================================================
* Orson Charts : a 3D chart library for the Java(tm) platform
* ===========================================================
*
* (C)opyright 2013-2016, by Object Refinery Limited. All rights reserved.
*
* http://www.object-refinery.com/orsoncharts/index.html
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
* Other names may be trademarks of their respective owners.]
*
* If you do not wish to be bound by the terms of the GPL, an alternative
* commercial license can be purchased. For details, please see visit the
* Orson Charts home page:
*
* http://www.object-refinery.com/orsoncharts/index.html
*
*/
package com.orsoncharts.data;
import java.util.List;
/**
* A two dimensional grid of data values where each value is uniquely
* identified by two keys (the {@code rowKey} and the
* {@code columnKey}). Any instance of {@code Comparable} can be
* used as a key ({@code String} objects are instances of
* {@code Comparable}, making them convenient key objects).
*
* @param <R> The row key type.
* @param <C> The column key type.
* @param <T> The value type.
*/
public interface KeyedValues2D<R extends Comparable<R>,
C extends Comparable<C>, T> extends Values2D<T> {
/**
* Returns the row key with the specified index.
*
* @param rowIndex the row index.
*
* @return The key.
*/
public R getRowKey(int rowIndex);
/**
* Returns the column key with the specified index.
*
* @param columnIndex the index.
*
* @return The key.
*/
public C getColumnKey(int columnIndex);
/**
* Returns the index of the specified key, or {@code -1} if there
* is no such key.
*
* @param rowKey the row key ({@code null} not permitted).
*
* @return The index, or {@code -1}.
*/
public int getRowIndex(R rowKey);
/**
* Returns the index of the specified key, or {@code -1} if there
* is no such key.
*
* @param columnKey the column key ({@code null} not permitted).
*
* @return The index, or {@code -1}.
*/
public int getColumnIndex(C columnKey);
/**
* Returns a list of the row keys (the order is significant, since data
* values can be accessed by index as well as by key).
* <br><br>
* NOTE: this method must be implemented so that modifications to the
* returned list do not impact the underlying data structure.
*
* @return A list of row keys.
*/
public List<R> getRowKeys();
/**
* Returns a list of the column keys (the order is significant, since data
* values can be accessed by index as well as by key).
* <br><br>
* NOTE: this method must be implemented so that modifications to the
* returned list do not impact the underlying data structure.
*
* @return A list of column keys.
*/
public List<C> getColumnKeys();
/**
* Returns the value (possibly {@code null}) associated with the
* specified keys. If either or both of the keys is not defined in this
* data structure, a runtime exception will be thrown.
*
* @param rowKey the row key ({@code null} not permitted).
* @param columnKey the column key ({@code null} not permitted).
*
* @return The value (possibly {@code null}).
*/
public T getValue(R rowKey, C columnKey);
}