/*
 *  Copyright 2010 BetaSteward_at_googlemail.com. All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without modification, are
 *  permitted provided that the following conditions are met:
 *
 *     1. Redistributions of source code must retain the above copyright notice, this list of
 *        conditions and the following disclaimer.
 *
 *     2. Redistributions in binary form must reproduce the above copyright notice, this list
 *        of conditions and the following disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 *  THIS SOFTWARE IS PROVIDED BY BetaSteward_at_googlemail.com ``AS IS'' AND ANY EXPRESS OR IMPLIED
 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 *  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BetaSteward_at_googlemail.com OR
 *  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 *  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 *  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 *  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *  The views and conclusions contained in the software and documentation are those of the
 *  authors and should not be interpreted as representing official policies, either expressed
 *  or implied, of BetaSteward_at_googlemail.com.
 */
package mage.util;

import java.util.ArrayList;
import java.util.List;

/**
 *
 * @author BetaSteward_at_googlemail.com
 * @param <T>
 */
public class TreeNode<T> {

    protected T data;
    protected List<TreeNode<T>> children;

    public TreeNode() {
        super();
        children = new ArrayList<>();
    }

    public TreeNode(T data) {
        this();
        setData(data);
    }

    public List<TreeNode<T>> getChildren() {
        return this.children;
    }

    public int getNumberOfChildren() {
        return getChildren().size();
    }

    public boolean hasChildren() {
        return (getNumberOfChildren() > 0);
    }

    public void setChildren(List<TreeNode<T>> children) {
        this.children = children;
    }

    public void addChild(TreeNode<T> child) {
        children.add(child);
    }

    public void addChild(T child) {
        children.add(new TreeNode<>(child));
    }

    public void addChildAt(int index, TreeNode<T> child) throws IndexOutOfBoundsException {
        children.add(index, child);
    }

    public void removeChildren() {
        this.children.clear();
    }

    public void removeChildAt(int index) throws IndexOutOfBoundsException {
        children.remove(index);
    }

    public TreeNode<T> getChildAt(int index) throws IndexOutOfBoundsException {
        return children.get(index);
    }

    public T getData() {
        return this.data;
    }

    private void setData(T data) {
        this.data = data;
    }

    @Override
    public String toString() {
        return getData().toString();
    }

    @Override
    public int hashCode() {
        return getData().hashCode();
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        final TreeNode<T> other = (TreeNode<T>) obj;
        return !(this.data != other.data && (this.data == null || !this.data.equals(other.data)));
    }

}