<?php
/* Copyright (C) NAVER <http://www.navercorp.com> */

/**
 * TablesTag class
 * Models the <tables> tag inside an XML Query file
 * @abstract
 *   Example
 *      <tables>
 *          <table name="documents" alias="doc" />
 *      </tables>
 *   Attributes
 *      None.
 *   Children
 *      Can have children of type <table> or <query>
 *
 * @author Arnia Sowftare
 * @package /classes/xml/xmlquery/tags/table
 * @version 0.1
 */
class TablesTag
{

	/**
	 * Table list
	 * @var array
	 */
	var $tables;

	/**
	 * constructor
	 * @param object $xml_tables_tag
	 * @param object $xml_index_hints_tag
	 * @return void
	 */
	function __construct($xml_tables_tag, $xml_index_hints_tag = NULL)
	{
		$this->tables = array();

		$xml_tables = $xml_tables_tag->table;
		if(!is_array($xml_tables))
		{
			$xml_tables = array($xml_tables);
		}

		if($xml_index_hints_tag)
		{
			$index_nodes = $xml_index_hints_tag->index;
			if(!is_array($index_nodes))
			{
				$index_nodes = array($index_nodes);
			}
			foreach($index_nodes as $index_node)
			{
				if(!isset($indexes[$index_node->attrs->table]))
				{
					$indexes[$index_node->attrs->table] = array();
				}
				$count = count($indexes[$index_node->attrs->table]);
				$indexes[$index_node->attrs->table][$count] = (object) NULL;
				$indexes[$index_node->attrs->table][$count]->name = $index_node->attrs->name;
				$indexes[$index_node->attrs->table][$count]->type = $index_node->attrs->type;
			}
		}

		foreach($xml_tables as $tag)
		{
			if($tag->attrs->query == 'true')
			{
				$this->tables[] = new QueryTag($tag, true);
			}
			else
			{
				if(isset($indexes[$tag->attrs->name]) && $indexes[$tag->attrs->name])
				{
					$this->tables[] = new HintTableTag($tag, $indexes[$tag->attrs->name]);
				}
				else
				{
					$this->tables[] = new TableTag($tag);
				}
			}
		}
	}

	function getTables()
	{
		return $this->tables;
	}

	function toString()
	{
		$output_tables = 'array(' . PHP_EOL;
		foreach($this->tables as $table)
		{
			if(is_a($table, 'QueryTag'))
			{
				$output_tables .= $table->toString() . PHP_EOL . ',';
			}
			else
			{
				$output_tables .= $table->getTableString() . PHP_EOL . ',';
			}
		}
		$output_tables = substr($output_tables, 0, -1);
		$output_tables .= ')';
		return $output_tables;
	}

	function getArguments()
	{
		$arguments = array();
		foreach($this->tables as $table)
		{
			$arguments = array_merge($arguments, $table->getArguments());
		}
		return $arguments;
	}

}
/* End of file TablesTag.class.php */
/* Location: ./classes/xml/xmlquery/tags/table/TablesTag.class.php */
