<?php
/**
 * JSON Schema Validation Library
 *
 * Copyright (c) 2005-2012, Rob Lanphier
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * 	* Redistributions of source code must retain the above copyright
 * 	  notice, this list of conditions and the following disclaimer.
 *
 * 	* 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.
 *
 * 	* Neither my name nor the names of my contributors may be used to
 * 	  endorse or promote products derived from this software without
 * 	  specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "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 THE COPYRIGHT
 * OWNER 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.
 *
 * @author Rob Lanphier <robla@wikimedia.org>
 * @copyright © 2011-2012 Rob Lanphier
 * @license http://jsonwidget.org/LICENSE BSD-3-Clause
 */

namespace MediaWiki\Extension\EventLogging\Libs\JsonSchemaValidation;

/*
 * Internal terminology:
 *   Node: "node" in the graph theory sense, but specifically, a node in the
 *    raw PHP data representation of the structure
 *   Ref: a node in the object tree.  Refs contain nodes and metadata about the
 *    nodes, as well as pointers to parent refs
 *
 * Structure for representing a generic tree which each node is aware of its
 * context (can refer to its parent).  Used for schema refs.
 */
class TreeRef {
	/** @var array */
	public $node;

	/** @var TreeRef|null */
	public $parent;

	/** @var int|null */
	public $nodeindex;

	/** @var string */
	public $nodename;

	/**
	 * @param array $node
	 * @param TreeRef|null $parent
	 * @param int|null $nodeindex
	 * @param string $nodename
	 */
	public function __construct( $node, $parent, $nodeindex, $nodename ) {
		$this->node = $node;
		$this->parent = $parent;
		$this->nodeindex = $nodeindex;
		$this->nodename = $nodename;
	}
}