102 lines
3.7 KiB
PHP
102 lines
3.7 KiB
PHP
<?php
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/**
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* SubQueryBuilder.php
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*
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* Builds the statements for sub-queries.
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*
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* PHP version 5
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*
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* LICENSE:
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* Copyright (c) 2010-2014 Justin Swanhart and André Rothe
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* @author André Rothe <andre.rothe@phosco.info>
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* @copyright 2010-2014 Justin Swanhart and André Rothe
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* @license http://www.debian.org/misc/bsd.license BSD License (3 Clause)
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* @version SVN: $Id: SubQueryBuilder.php 830 2013-12-18 09:35:42Z phosco@gmx.de $
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*
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*/
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require_once dirname(__FILE__) . '/RefClauseBuilder.php';
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require_once dirname(__FILE__) . '/RefTypeBuilder.php';
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require_once dirname(__FILE__) . '/JoinBuilder.php';
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require_once dirname(__FILE__) . '/AliasBuilder.php';
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require_once dirname(__FILE__) . '/AliasBuilder.php';
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require_once dirname(__FILE__) . '/../utils/ExpressionType.php';
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/**
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* This class implements the builder for sub-queries.
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* You can overwrite all functions to achieve another handling.
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*
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* @author André Rothe <andre.rothe@phosco.info>
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* @license http://www.debian.org/misc/bsd.license BSD License (3 Clause)
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*
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*/
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class SubQueryBuilder {
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protected function buildRefClause($parsed) {
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$builder = new RefClauseBuilder();
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return $builder->build($parsed);
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}
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protected function buildRefType($parsed) {
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$builder = new RefTypeBuilder();
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return $builder->build($parsed);
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}
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protected function buildJoin($parsed) {
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$builder = new JoinBuilder();
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return $builder->build($parsed);
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}
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protected function buildAlias($parsed) {
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$builder = new AliasBuilder();
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return $builder->build($parsed);
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}
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protected function buildSelectStatement($parsed) {
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$builder = new SelectStatementBuilder();
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return $builder->build($parsed);
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}
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public function build($parsed, $index = 0) {
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if ($parsed['expr_type'] !== ExpressionType::SUBQUERY) {
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return "";
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}
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$sql = $this->buildSelectStatement($parsed['sub_tree']);
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$sql = "(" . $sql . ")";
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$sql .= $this->buildAlias($parsed);
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if ($index !== 0) {
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$sql = $this->buildJoin($parsed['join_type']) . $sql;
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$sql .= $this - buildRefType($parsed['ref_type']);
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$sql .= $this->buildRefClause($parsed['ref_clause']);
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}
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return $sql;
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}
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}
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?>
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