PhabricatorConfigTableSchema.php
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	<?php

	final class PhabricatorConfigTableSchema
	extends PhabricatorConfigStorageSchema {

	private $collation;
	private $columns = array();

	public function addColumn(PhabricatorConfigColumnSchema $column) {
	$key = $column->getName();
	if (isset($this->columns[$key])) {
	throw new Exception(
	pht('Trying to add duplicate column "%s"!', $key));
	}
	$this->columns[$key] = $column;
	return $this;
	}

	public function getColumns() {
	return $this->columns;
	}

	public function getColumn($key) {
	return idx($this->getColumns(), $key);
	}

	protected function getSubschemata() {
	return $this->getColumns();
	}

	public function setCollation($collation) {
	$this->collation = $collation;
	return $this;
	}

	public function getCollation() {
	return $this->collation;
	}

	public function compareToSimilarSchema(
	PhabricatorConfigStorageSchema $expect) {

	$issues = array();
	if ($this->getCollation() != $expect->getCollation()) {
	$issues[] = self::ISSUE_COLLATION;
	}

	return $issues;
	}

	public function newEmptyClone() {
	$clone = clone $this;
	$clone->columns = array();
	return $clone;
	}

	}