70 lines
2.2 KiB
PHP
70 lines
2.2 KiB
PHP
<?php
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/*
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* $Id: Unique.php 536 2007-01-10 14:30:38Z heltem $
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* 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
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the LGPL. For more information please see
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* <http://propel.phpdb.org>.
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*/
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include_once 'propel/engine/database/model/Index.php';
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/**
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* Information about unique columns of a table. This class assumes
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* that in the underlying RDBMS, unique constraints and unique indices
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* are roughly equivalent. For example, adding a unique constraint to
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* a column also creates an index on that column (this is known to be
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* true for MySQL and Oracle).
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*
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* @author Hans Lellelid <hans@xmpl.org> (Propel)
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* @author Jason van Zyl <jvanzyl@apache.org> (Torque)
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* @author Daniel Rall <dlr@collab.net> (Torque)
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* @version $Revision: 536 $
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* @package propel.engine.database.model
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*/
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class Unique extends Index {
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/**
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* Default constructor.
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*/
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public function __construct(Table $table, $indexColumns = array())
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{
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}
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/**
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* Returns <code>true</code>.
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*/
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public function isUnique()
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{
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return true;
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}
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/**
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* String representation of the index. This is an xml representation.
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*/
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public function toString()
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{
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$result = " <unique name=\"" . $this->getName() . "\">\n";
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$columns = $this->getColumns();
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for ($i=0, $size=count($columns); $i < $size; $i++) {
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$result .= " <unique-column name=\""
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. $columns[$i]
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. "\"/>\n";
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}
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$result .= " </unique>\n";
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return $result;
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}
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}
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