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SelectQuery.class.php
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496 lines (405 loc) · 9.41 KB
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<?php
/****************************************************************************
* Copyright (C) 2004-2007 by Konstantin V. Arkhipov, Anton E. Lebedevich *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License as *
* published by the Free Software Foundation; either version 3 of the *
* License, or (at your option) any later version. *
* *
****************************************************************************/
/**
* @ingroup OSQL
**/
final class SelectQuery
extends QuerySkeleton
implements Named, JoinCapableQuery, Aliased
{
private $distinct = false;
private $name = null;
private $joiner = null;
private $limit = null;
private $offset = null;
private $fields = array();
private $order = null;
private $group = array();
private $having = null;
public function __construct()
{
$this->joiner = new Joiner();
$this->order = new OrderChain();
}
public function __clone()
{
$this->joiner = clone $this->joiner;
$this->order = clone $this->order;
}
public function hasAliasInside($alias)
{
return isset($this->aliases[$alias]);
}
public function getAlias()
{
return $this->name;
}
public function getName()
{
return $this->name;
}
/**
* @return SelectQuery
**/
public function setName($name)
{
$this->name = $name;
$this->aliases[$name] = true;
return $this;
}
/**
* @return SelectQuery
**/
public function distinct()
{
$this->distinct = true;
return $this;
}
public function isDistinct()
{
return $this->distinct;
}
/**
* @return SelectQuery
**/
public function unDistinct()
{
$this->distinct = false;
return $this;
}
public function hasJoinedTable($table)
{
return $this->joiner->hasJoinedTable($table);
}
public function getJoinedTables()
{
return $this->joiner->getTables();
}
/**
* @return SelectQuery
**/
public function join($table, LogicalObject $logic, $alias = null)
{
$this->joiner->join(new SQLJoin($table, $logic, $alias));
$this->aliases[$alias] = true;
return $this;
}
/**
* @return SelectQuery
**/
public function leftJoin($table, LogicalObject $logic, $alias = null)
{
$this->joiner->leftJoin(new SQLLeftJoin($table, $logic, $alias));
$this->aliases[$alias] = true;
return $this;
}
/**
* @return SelectQuery
**/
public function rightJoin($table, LogicalObject $logic, $alias = null)
{
$this->joiner->rightJoin(new SQLRightJoin($table, $logic, $alias));
$this->aliases[$alias] = true;
return $this;
}
/**
* @param $table
* @param LogicalObject $logic
* @param null $alias
* @return SelectQuery
*/
public function fullOuterJoin($table, LogicalObject $logic, $alias = null)
{
$this->joiner->fullOuterJoin(
new SQLFullOuterJoin($table, $logic, $alias)
);
$this->aliases[$alias] = true;
return $this;
}
/**
* @return SelectQuery
**/
public function setOrderChain(OrderChain $chain)
{
$this->order = $chain;
return $this;
}
/**
* @return SelectQuery
**/
public function orderBy($field, $table = null)
{
$this->order->add($this->makeOrder($field, $table));
return $this;
}
/**
* @return SelectQuery
**/
public function prependOrderBy($field, $table = null)
{
$this->order->prepend($this->makeOrder($field, $table));
return $this;
}
/**
* @throws WrongStateException
* @return SelectQuery
**/
public function desc()
{
if (!$last = $this->order->getLast())
throw new WrongStateException('no fields to sort');
$last->desc();
return $this;
}
/**
* @throws WrongStateException
* @return SelectQuery
**/
public function asc()
{
if (!$last = $this->order->getLast())
throw new WrongStateException('no fields to sort');
$last->asc();
return $this;
}
/**
* @return SelectQuery
**/
public function groupBy($field, $table = null)
{
if ($field instanceof DialectString)
$this->group[] = $field;
else
$this->group[] =
new DBField($field, $this->getLastTable($table));
return $this;
}
/**
* @return SelectQuery
**/
public function dropGroupBy()
{
$this->group = array();
return $this;
}
/**
* @return SelectQuery
**/
public function having(LogicalObject $exp)
{
$this->having = $exp;
return $this;
}
public function getLimit()
{
return $this->limit;
}
public function getOffset()
{
return $this->offset;
}
/**
* @throws WrongArgumentException
* @return SelectQuery
**/
public function limit($limit = null, $offset = null)
{
if ($limit !== null)
Assert::isPositiveInteger($limit, 'invalid limit specified');
if ($offset !== null)
Assert::isInteger($offset, 'invalid offset specified');
$this->limit = $limit;
$this->offset = $offset;
return $this;
}
/**
* @return SelectQuery
**/
public function from($table, $alias = null)
{
$this->joiner->from(new FromTable($table, $alias));
$this->aliases[$alias] = true;
return $this;
}
public function getFirstTable()
{
return $this->joiner->getFirstTable();
}
/**
* @throws WrongArgumentException
* @return SelectQuery
**/
public function get($field, $alias = null)
{
$this->fields[] =
$this->resolveSelectField(
$field,
$alias,
$this->getLastTable()
);
if ($alias = $this->resolveAliasByField($field, $alias)) {
$this->aliases[$alias] = true;
}
return $this;
}
/**
* @return SelectQuery
**/
public function multiGet(/* ... */)
{
$size = func_num_args();
if ($size && $args = func_get_args())
for ($i = 0; $i < $size; ++$i)
$this->get($args[$i]);
return $this;
}
/**
* @return SelectQuery
**/
public function arrayGet($array, $prefix = null)
{
$size = count($array);
if ($prefix) {
for ($i = 0; $i < $size; ++$i) {
if ($array[$i] instanceof DialectString) {
if ($array[$i] instanceof DBField) {
$alias = $prefix.$array[$i]->getField();
} else {
if ($array[$i] instanceof SQLFunction) {
$alias =
$array[$i]->setAlias(
$prefix.$array[$i]->getName()
)->
getAlias();
} else {
$alias = $array[$i];
}
}
} else {
$alias = $prefix.$array[$i];
}
$this->get($array[$i], $alias);
}
} else {
for ($i = 0; $i < $size; ++$i) {
$this->get($array[$i]);
}
}
return $this;
}
public function getFieldsCount()
{
return count($this->fields);
}
public function getTablesCount()
{
return $this->joiner->getTablesCount();
}
public function getFieldNames()
{
$nameList = array();
foreach ($this->fields as $field) {
if ($field instanceof SelectField) {
if ($alias = $field->getAlias()) {
$nameList[] = $alias;
continue;
} elseif (($subField = $field->getField()) instanceof Aliased) {
if ($alias = $subField->getAlias()) {
$nameList[] = $alias;
continue;
}
}
}
$nameList[] = $field->getName();
}
return $nameList;
}
public function returning($field, $alias = null)
{
throw new UnsupportedMethodException();
}
public function toDialectString(Dialect $dialect)
{
$fieldList = array();
foreach ($this->fields as $field)
$fieldList[] = $this->toDialectStringField($field, $dialect);
$query =
'SELECT '.($this->distinct ? 'DISTINCT ' : null)
.implode(', ', $fieldList)
.$this->joiner->toDialectString($dialect);
// WHERE
$query .= parent::toDialectString($dialect);
if ($this->group) {
$groupList = array();
foreach ($this->group as $group)
$groupList[] = $group->toDialectString($dialect);
if ($groupList)
$query .= ' GROUP BY '.implode(', ', $groupList);
}
if ($this->having)
$query .= ' HAVING '.$this->having->toDialectString($dialect);
if ($this->order->getCount()) {
$query .= ' ORDER BY '.$this->order->toDialectString($dialect);
}
if ($this->limit)
$query .= ' LIMIT '.$this->limit;
if ($this->offset)
$query .= ' OFFSET '.$this->offset;
return $query;
}
/**
* @return SelectQuery
**/
public function dropFields()
{
$this->fields = array();
return $this;
}
/**
* @return SelectQuery
**/
public function dropOrder()
{
$this->order = new OrderChain();
return $this;
}
/**
* @return SelectQuery
**/
public function dropLimit()
{
$this->limit = $this->offset = null;
return $this;
}
private function getLastTable($table = null)
{
if (!$table && ($last = $this->joiner->getLastTable()))
return $last;
return $table;
}
/**
* @return OrderBy
**/
private function makeOrder($field, $table = null)
{
if (
$field instanceof OrderBy
|| $field instanceof DialectString
)
return $field;
else
return
new OrderBy(
new DBField($field, $this->getLastTable($table))
);
}
}
?>