/* ===========================================================
* 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.interaction;
import java.io.Serializable;
import java.util.Collection;
import java.util.Set;
import java.util.TreeSet;
import com.orsoncharts.data.KeyedValues3D;
import com.orsoncharts.data.KeyedValues3DItemKey;
import com.orsoncharts.util.ArgChecks;
/**
* An object that tracks selected items from a {@link KeyedValues3D} dataset.
*
* @since 1.3
*/
public class StandardKeyedValues3DItemSelection
implements KeyedValues3DItemSelection, Serializable {
/** The set of selected items. */
Set<KeyedValues3DItemKey> selectedItems;
/**
* Creates a new item selection instance, initially with no selections.
*/
public StandardKeyedValues3DItemSelection() {
this.selectedItems = new TreeSet<KeyedValues3DItemKey>();
}
/**
* Adds an item to the selection, returning {@code true} if the item
* is added and {@code false} if the item already existed in the
* selection.
*
* @param itemKey the item key ({@code null} not permitted).
*
* @return A boolean.
*/
public boolean add(KeyedValues3DItemKey itemKey) {
ArgChecks.nullNotPermitted(itemKey, "itemKey");
return this.selectedItems.add(itemKey);
}
/**
* Adds a collection of items to the selection, returning {@code true}
* if the selection is changed, and {@code false} if no changes were
* made.
*
* @param keys the keys to add ({@code null} not permitted).
*
* @return A boolean.
*/
public boolean addAll(Collection<? extends KeyedValues3DItemKey> keys) {
ArgChecks.nullNotPermitted(keys, "keys");
return this.selectedItems.addAll(keys);
}
/**
* Removes an item from the selection returning {@code true} if the
* item was removed and {@code false} if it did not exist within the
* selection.
*
* @param itemKey the item key ({@code null} not permitted).
*
* @return A boolean.
*/
public boolean remove(KeyedValues3DItemKey itemKey) {
return this.selectedItems.remove(itemKey);
}
/**
* Returns {@code true} if the specified item is in the selection,
* and {@code false} otherwise.
*
* @param itemKey the item key ({@code null} not permitted).
*
* @return A boolean.
*/
@Override
public boolean isSelected(KeyedValues3DItemKey itemKey) {
return this.selectedItems.contains(itemKey);
}
/**
* Clears the item selection (that is, removes all items contained in the
* selection).
*/
public void clear() {
this.selectedItems.clear();
}
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (!(obj instanceof StandardKeyedValues3DItemSelection)) {
return false;
}
StandardKeyedValues3DItemSelection that
= (StandardKeyedValues3DItemSelection) obj;
if (!this.selectedItems.equals(that.selectedItems)) {
return false;
}
return true;
}
}