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<?php
namespace PHPCR\Util\QOM;
use DateTime;
use Exception;
use InvalidArgumentException;
use LogicException;
use PHPCR\PropertyType;
use PHPCR\Query\InvalidQueryException;
use PHPCR\Query\QOM\ChildNodeJoinConditionInterface;
use PHPCR\Query\QOM\ColumnInterface;
use PHPCR\Query\QOM\ComparisonInterface;
use PHPCR\Query\QOM\ConstraintInterface;
use PHPCR\Query\QOM\DescendantNodeJoinConditionInterface;
use PHPCR\Query\QOM\DynamicOperandInterface;
use PHPCR\Query\QOM\EquiJoinConditionInterface;
use PHPCR\Query\QOM\FullTextSearchInterface;
use PHPCR\Query\QOM\JoinConditionInterface;
use PHPCR\Query\QOM\JoinInterface;
use PHPCR\Query\QOM\NotInterface;
use PHPCR\Query\QOM\OrderingInterface;
use PHPCR\Query\QOM\PropertyValueInterface;
use PHPCR\Query\QOM\QueryObjectModelConstantsInterface as Constants;
use PHPCR\Query\QOM\QueryObjectModelFactoryInterface;
use PHPCR\Query\QOM\QueryObjectModelInterface;
use PHPCR\Query\QOM\SameNodeJoinConditionInterface;
use PHPCR\Query\QOM\SelectorInterface;
use PHPCR\Query\QOM\SourceInterface;
use PHPCR\Query\QOM\StaticOperandInterface;
use PHPCR\Util\ValueConverter;
/**
* Parse SQL2 statements and output a corresponding QOM objects tree.
*
* @license http://www.apache.org/licenses Apache License Version 2.0, January 2004
* @license http://opensource.org/licenses/MIT MIT License
*/
class Sql2ToQomQueryConverter
{
/**
* The factory to create QOM objects.
*
* @var QueryObjectModelFactoryInterface
*/
protected $factory;
/**
* Scanner to parse SQL2.
*
* @var Sql2Scanner;
*/
protected $scanner;
/**
* The SQL2 query (the converter is not reentrant).
*
* @var string
*/
protected $sql2;
/**
* The selector is not required for SQL2 but for QOM.
*
* We keep all selectors we encounter. If there is exactly one, it is used
* whenever we encounter non-qualified names.
*
* @var string|array
*/
protected $implicitSelectorName = null;
/**
* @var ValueConverter
*/
private $valueConverter;
/**
* Instantiate a converter.
*
* @param QueryObjectModelFactoryInterface $factory
* @param ValueConverter $valueConverter To override default converter.
*/
public function __construct(QueryObjectModelFactoryInterface $factory, ValueConverter $valueConverter = null)
{
$this->factory = $factory;
$this->valueConverter = $valueConverter ?: new ValueConverter();
}
/**
* 6.7.1. Query
* Parse an SQL2 query and return the corresponding QOM QueryObjectModel.
*
* @param string $sql2
*
* @throws InvalidQueryException
*
* @return QueryObjectModelInterface
*/
public function parse($sql2)
{
$this->implicitSelectorName = null;
$this->sql2 = $sql2;
$this->scanner = new Sql2Scanner($sql2);
$source = null;
$columnData = [];
$constraint = null;
$orderings = [];
while ($this->scanner->lookupNextToken() !== '') {
switch (strtoupper($this->scanner->lookupNextToken())) {
case 'SELECT':
$this->scanner->expectToken('SELECT');
$columnData = $this->scanColumns();
break;
case 'FROM':
$this->scanner->expectToken('FROM');
$source = $this->parseSource();
break;
case 'WHERE':
$this->scanner->expectToken('WHERE');
$constraint = $this->parseConstraint();
break;
case 'ORDER':
// Ordering, check there is a BY
$this->scanner->expectTokens(['ORDER', 'BY']);
$orderings = $this->parseOrderings();
break;
default:
throw new InvalidQueryException('Error parsing query, unknown query part "'.$this->scanner->lookupNextToken().'" in: '.$this->sql2);
}
}
if (!$source instanceof SourceInterface) {
throw new InvalidQueryException('Invalid query, source could not be determined: '.$sql2);
}
$columns = $this->buildColumns($columnData);
return $this->factory->createQuery($source, $constraint, $orderings, $columns);
}
/**
* 6.7.2. Source
* Parse an SQL2 source definition and return the corresponding QOM Source.
*
* @return SourceInterface
*/
protected function parseSource()
{
$selector = $this->parseSelector();
$next = $this->scanner->lookupNextToken();
$left = $selector;
while (in_array(strtoupper($next), ['JOIN', 'INNER', 'RIGHT', 'LEFT'])) {
$left = $this->parseJoin($left);
$next = $this->scanner->lookupNextToken();
}
return $left;
}
/**
* 6.7.3. Selector
* Parse an SQL2 selector and return a QOM\SelectorInterface.
*
* @return SelectorInterface
*/
protected function parseSelector()
{
$nodetype = $this->fetchTokenWithoutBrackets();
if ($this->scanner->tokenIs($this->scanner->lookupNextToken(), 'AS')) {
$this->scanner->fetchNextToken(); // Consume the AS
$selectorName = $this->parseName();
$this->updateImplicitSelectorName($selectorName);
return $this->factory->selector($selectorName, $nodetype);
}
$this->updateImplicitSelectorName($nodetype);
return $this->factory->selector($nodetype, $nodetype);
}
/**
* 6.7.4. Name.
*
* @return string
*/
protected function parseName()
{
return $this->scanner->fetchNextToken();
}
/**
* 6.7.5. Join
* 6.7.6. Join type
* Parse an SQL2 join source and return a QOM\Join.
*
* @param SourceInterface $leftSelector the left selector as it has been read by parseSource
*
* @return JoinInterface
*/
protected function parseJoin(SourceInterface $leftSelector)
{
$joinType = $this->parseJoinType();
$right = $this->parseSelector();
$joinCondition = $this->parseJoinCondition();
return $this->factory->join($leftSelector, $right, $joinType, $joinCondition);
}
/**
* 6.7.6. Join type.
*
* @throws InvalidQueryException
*
* @return string
*/
protected function parseJoinType()
{
$joinType = Constants::JCR_JOIN_TYPE_INNER;
$token = $this->scanner->fetchNextToken();
switch ($token) {
case 'JOIN':
// Token already fetched, nothing to do
break;
case 'INNER':
$this->scanner->fetchNextToken();
break;
case 'LEFT':
$this->scanner->expectTokens(['OUTER', 'JOIN']);
$joinType = Constants::JCR_JOIN_TYPE_LEFT_OUTER;
break;
case 'RIGHT':
$this->scanner->expectTokens(['OUTER', 'JOIN']);
$joinType = Constants::JCR_JOIN_TYPE_RIGHT_OUTER;
break;
default:
throw new InvalidQueryException("Syntax error: Expected JOIN, INNER JOIN, RIGHT JOIN or LEFT JOIN in '{$this->sql2}'");
}
return $joinType;
}
/**
* 6.7.7. JoinCondition
* Parse an SQL2 join condition and return a JoinConditionInterface.
*
* @return JoinConditionInterface
*/
protected function parseJoinCondition()
{
$this->scanner->expectToken('ON');
$token = $this->scanner->lookupNextToken();
if ($this->scanner->tokenIs($token, 'ISSAMENODE')) {
return $this->parseSameNodeJoinCondition();
}
if ($this->scanner->tokenIs($token, 'ISCHILDNODE')) {
return $this->parseChildNodeJoinCondition();
}
if ($this->scanner->tokenIs($token, 'ISDESCENDANTNODE')) {
return $this->parseDescendantNodeJoinCondition();
}
return $this->parseEquiJoin();
}
/**
* 6.7.8. EquiJoinCondition
* Parse an SQL2 equijoin condition and return a EquiJoinConditionInterface.
*
* @return EquiJoinConditionInterface
*/
protected function parseEquiJoin()
{
list($selectorName1, $prop1) = $this->parseIdentifier();
$this->scanner->expectToken('=');
list($selectorName2, $prop2) = $this->parseIdentifier();
return $this->factory->equiJoinCondition($selectorName1, $prop1, $selectorName2, $prop2);
}
/**
* 6.7.9 SameNodeJoinCondition
* Parse an SQL2 same node join condition and return a SameNodeJoinConditionInterface.
*
* @return SameNodeJoinConditionInterface
*/
protected function parseSameNodeJoinCondition()
{
$this->scanner->expectTokens(['ISSAMENODE', '(']);
$selectorName1 = $this->fetchTokenWithoutBrackets();
$this->scanner->expectToken(',');
$selectorName2 = $this->fetchTokenWithoutBrackets();
$token = $this->scanner->lookupNextToken();
if ($this->scanner->tokenIs($token, ',')) {
$this->scanner->fetchNextToken(); // consume the coma
$path = $this->parsePath();
} else {
$path = null;
}
$this->scanner->expectToken(')');
return $this->factory->sameNodeJoinCondition($selectorName1, $selectorName2, $path);
}
/**
* 6.7.10 ChildNodeJoinCondition
* Parse an SQL2 child node join condition and return a ChildNodeJoinConditionInterface.
*
* @return ChildNodeJoinConditionInterface
*/
protected function parseChildNodeJoinCondition()
{
$this->scanner->expectTokens(['ISCHILDNODE', '(']);
$child = $this->fetchTokenWithoutBrackets();
$this->scanner->expectToken(',');
$parent = $this->fetchTokenWithoutBrackets();
$this->scanner->expectToken(')');
return $this->factory->childNodeJoinCondition($child, $parent);
}
/**
* 6.7.11 DescendantNodeJoinCondition
* Parse an SQL2 descendant node join condition and return a DescendantNodeJoinConditionInterface.
*
* @return DescendantNodeJoinConditionInterface
*/
protected function parseDescendantNodeJoinCondition()
{
$this->scanner->expectTokens(['ISDESCENDANTNODE', '(']);
$descendant = $this->fetchTokenWithoutBrackets();
$this->scanner->expectToken(',');
$parent = $this->fetchTokenWithoutBrackets();
$this->scanner->expectToken(')');
return $this->factory->descendantNodeJoinCondition($descendant, $parent);
}
/**
* 6.7.13 And
* 6.7.14 Or.
*
* @param ConstraintInterface $lhs Left hand side
* @param int $minprec Precedence
*
* @throws Exception
*
* @return ConstraintInterface
*/
protected function parseConstraint($lhs = null, $minprec = 0)
{
if ($lhs === null) {
$lhs = $this->parsePrimaryConstraint();
}
$opprec = [
'OR' => 1,
'AND' => 2,
];
$op = strtoupper($this->scanner->lookupNextToken());
while (isset($opprec[$op]) && $opprec[$op] >= $minprec) {
$this->scanner->fetchNextToken();
$rhs = $this->parsePrimaryConstraint();
$nextop = strtoupper($this->scanner->lookupNextToken());
while (isset($opprec[$nextop]) && $opprec[$nextop] > $opprec[$op]) {
$rhs = $this->parseConstraint($rhs, $opprec[$nextop]);
$nextop = strtoupper($this->scanner->lookupNextToken());
}
switch ($op) {
case 'AND':
$lhs = $this->factory->andConstraint($lhs, $rhs);
break;
case 'OR':
$lhs = $this->factory->orConstraint($lhs, $rhs);
break;
default:
// this only happens if the operator is
// in the $opprec-array but there is no
// "elseif"-branch here for this operator.
throw new Exception("Internal error: No action is defined for operator '$op'");
}
$op = strtoupper($this->scanner->lookupNextToken());
}
return $lhs;
}
/**
* 6.7.12 Constraint.
*
* @return ConstraintInterface
*/
protected function parsePrimaryConstraint()
{
$constraint = null;
$token = $this->scanner->lookupNextToken();
if ($this->scanner->tokenIs($token, 'NOT')) {
// NOT
$constraint = $this->parseNot();
} elseif ($this->scanner->tokenIs($token, '(')) {
// Grouping with parenthesis
$this->scanner->expectToken('(');
$constraint = $this->parseConstraint();
$this->scanner->expectToken(')');
} elseif ($this->scanner->tokenIs($token, 'CONTAINS')) {
// Full Text Search
$constraint = $this->parseFullTextSearch();
} elseif ($this->scanner->tokenIs($token, 'ISSAMENODE')) {
// SameNode
$constraint = $this->parseSameNode();
} elseif ($this->scanner->tokenIs($token, 'ISCHILDNODE')) {
// ChildNode
$constraint = $this->parseChildNode();
} elseif ($this->scanner->tokenIs($token, 'ISDESCENDANTNODE')) {
// DescendantNode
$constraint = $this->parseDescendantNode();
} else {
// Is it a property existence?
$next1 = $this->scanner->lookupNextToken(1);
if ($this->scanner->tokenIs($next1, 'IS')) {
$constraint = $this->parsePropertyExistence();
} elseif ($this->scanner->tokenIs($next1, '.')) {
$next2 = $this->scanner->lookupNextToken(3);
if ($this->scanner->tokenIs($next2, 'IS')) {
$constraint = $this->parsePropertyExistence();
}
}
if ($constraint === null) {
// It's not a property existence neither, then it's a comparison
$constraint = $this->parseComparison();
}
}
// No constraint read,
if ($constraint === null) {
throw new InvalidQueryException("Syntax error: constraint expected in '{$this->sql2}'");
}
return $constraint;
}
/**
* 6.7.15 Not.
*
* @return NotInterface
*/
protected function parseNot()
{
$this->scanner->expectToken('NOT');
return $this->factory->notConstraint($this->parsePrimaryConstraint());
}
/**
* 6.7.16 Comparison.
*
* @throws InvalidQueryException
*
* @return ComparisonInterface
*/
protected function parseComparison()
{
$op1 = $this->parseDynamicOperand();
if (null === $op1) {
throw new InvalidQueryException("Syntax error: dynamic operator expected in '{$this->sql2}'");
}
$operator = $this->parseOperator();
$op2 = $this->parseStaticOperand();
return $this->factory->comparison($op1, $operator, $op2);
}
/**
* 6.7.17 Operator.
*
* @return string a constant from QueryObjectModelConstantsInterface
*/
protected function parseOperator()
{
$token = $this->scanner->fetchNextToken();
switch (strtoupper($token)) {
case '=':
return Constants::JCR_OPERATOR_EQUAL_TO;
case '<>':
return Constants::JCR_OPERATOR_NOT_EQUAL_TO;
case '<':
return Constants::JCR_OPERATOR_LESS_THAN;
case '<=':
return Constants::JCR_OPERATOR_LESS_THAN_OR_EQUAL_TO;
case '>':
return Constants::JCR_OPERATOR_GREATER_THAN;
case '>=':
return Constants::JCR_OPERATOR_GREATER_THAN_OR_EQUAL_TO;
case 'LIKE':
return Constants::JCR_OPERATOR_LIKE;
}
throw new InvalidQueryException("Syntax error: operator expected in '{$this->sql2}'");
}
/**
* 6.7.18 PropertyExistence.
*
* @return ConstraintInterface
*/
protected function parsePropertyExistence()
{
list($selectorName, $prop) = $this->parseIdentifier();
$this->scanner->expectToken('IS');
$token = $this->scanner->lookupNextToken();
if ($this->scanner->tokenIs($token, 'NULL')) {
$this->scanner->fetchNextToken();
return $this->factory->notConstraint($this->factory->propertyExistence($selectorName, $prop));
}
$this->scanner->expectTokens(['NOT', 'NULL']);
return $this->factory->propertyExistence($selectorName, $prop);
}
/**
* 6.7.19 FullTextSearch.
*
* @return FullTextSearchInterface
*/
protected function parseFullTextSearch()
{
$this->scanner->expectTokens(['CONTAINS', '(']);
list($selectorName, $propertyName) = $this->parseIdentifier();
$this->scanner->expectToken(',');
$expression = $this->parseLiteralValue();
$this->scanner->expectToken(')');
return $this->factory->fullTextSearch($selectorName, $propertyName, $expression);
}
/**
* 6.7.20 SameNode.
*/
protected function parseSameNode()
{
$this->scanner->expectTokens(['ISSAMENODE', '(']);
if ($this->scanner->tokenIs($this->scanner->lookupNextToken(1), ',')) {
$selectorName = $this->scanner->fetchNextToken();
$this->scanner->expectToken(',');
$path = $this->parsePath();
} else {
$selectorName = $this->implicitSelectorName;
$path = $this->parsePath();
}
$this->scanner->expectToken(')');
return $this->factory->sameNode($selectorName, $path);
}
/**
* 6.7.21 ChildNode.
*/
protected function parseChildNode()
{
$this->scanner->expectTokens(['ISCHILDNODE', '(']);
if ($this->scanner->tokenIs($this->scanner->lookupNextToken(1), ',')) {
$selectorName = $this->scanner->fetchNextToken();
$this->scanner->expectToken(',');
$path = $this->parsePath();
} else {
$selectorName = $this->implicitSelectorName;
$path = $this->parsePath();
}
$this->scanner->expectToken(')');
return $this->factory->childNode($selectorName, $path);
}
/**
* 6.7.22 DescendantNode.
*/
protected function parseDescendantNode()
{
$this->scanner->expectTokens(['ISDESCENDANTNODE', '(']);
if ($this->scanner->tokenIs($this->scanner->lookupNextToken(1), ',')) {
$selectorName = $this->scanner->fetchNextToken();
$this->scanner->expectToken(',');
$path = $this->parsePath();
} else {
$selectorName = $this->implicitSelectorName;
$path = $this->parsePath();
}
$this->scanner->expectToken(')');
return $this->factory->descendantNode($selectorName, $path);
}
/**
* Parse a JCR path consisting of either a simple path (a JCR name that contains
* only SQL-legal characters) or a path (simple path or quoted path) enclosed in
* square brackets. See JCR Spec § 6.7.23.
*
* 6.7.23. Path
*/
protected function parsePath()
{
$path = $this->parseLiteralValue();
if (substr($path, 0, 1) === '[' && substr($path, -1) === ']') {
$path = substr($path, 1, -1);
}
return $path;
}
/**
* Parse an SQL2 static operand
* 6.7.35 BindVariable
* 6.7.36 Prefix.
*
* @return StaticOperandInterface
*/
protected function parseStaticOperand()
{
$token = $this->scanner->lookupNextToken();
if (substr($token, 0, 1) === '$') {
return $this->factory->bindVariable(substr($this->scanner->fetchNextToken(), 1));
}
return $this->factory->literal($this->parseLiteralValue());
}
/**
* 6.7.26 DynamicOperand
* 6.7.28 Length
* 6.7.29 NodeName
* 6.7.30 NodeLocalName
* 6.7.31 FullTextSearchScore
* 6.7.32 LowerCase
* 6.7.33 UpperCase
* Parse an SQL2 dynamic operand.
*
* @return DynamicOperandInterface
*/
protected function parseDynamicOperand()
{
$token = $this->scanner->lookupNextToken();
if ($this->scanner->tokenIs($token, 'LENGTH')) {
$this->scanner->fetchNextToken();
$this->scanner->expectToken('(');
$val = $this->parsePropertyValue();
$this->scanner->expectToken(')');
return $this->factory->length($val);
}
if ($this->scanner->tokenIs($token, 'NAME')) {
$this->scanner->fetchNextToken();
$this->scanner->expectToken('(');
$token = $this->scanner->fetchNextToken();
if ($this->scanner->tokenIs($token, ')')) {
return $this->factory->nodeName($this->implicitSelectorName);
}
$this->scanner->expectToken(')');
return $this->factory->nodeName($token);
}
if ($this->scanner->tokenIs($token, 'LOCALNAME')) {
$this->scanner->fetchNextToken();
$this->scanner->expectToken('(');
$token = $this->scanner->fetchNextToken();
if ($this->scanner->tokenIs($token, ')')) {
return $this->factory->nodeLocalName($this->implicitSelectorName);
}
$this->scanner->expectToken(')');
return $this->factory->nodeLocalName($token);
}
if ($this->scanner->tokenIs($token, 'SCORE')) {
$this->scanner->fetchNextToken();
$this->scanner->expectToken('(');
$token = $this->scanner->fetchNextToken();
if ($this->scanner->tokenIs($token, ')')) {
return $this->factory->fullTextSearchScore($this->implicitSelectorName);
}
$this->scanner->expectToken(')');
return $this->factory->fullTextSearchScore($token);
}
if ($this->scanner->tokenIs($token, 'LOWER')) {
$this->scanner->fetchNextToken();
$this->scanner->expectToken('(');
$op = $this->parseDynamicOperand();
$this->scanner->expectToken(')');
return $this->factory->lowerCase($op);
}
if ($this->scanner->tokenIs($token, 'UPPER')) {
$this->scanner->fetchNextToken();
$this->scanner->expectToken('(');
$op = $this->parseDynamicOperand();
$this->scanner->expectToken(')');
return $this->factory->upperCase($op);
}
return $this->parsePropertyValue();
}
/**
* 6.7.27 PropertyValue
* Parse an SQL2 property value.
*
* @return PropertyValueInterface
*/
protected function parsePropertyValue()
{
list($selectorName, $prop) = $this->parseIdentifier();
return $this->factory->propertyValue($selectorName, $prop);
}
protected function parseCastLiteral($token)
{
if (!$this->scanner->tokenIs($token, 'CAST')) {
throw new LogicException('parseCastLiteral when not a CAST');
}
$this->scanner->expectToken('(');
$token = $this->scanner->fetchNextToken();
$quoteString = in_array($token[0], ['\'', '"'], true);
if ($quoteString) {
$quotesUsed = $token[0];
$token = substr($token, 1, -1);
// Un-escaping quotes
$token = str_replace('\\'.$quotesUsed, $quotesUsed, $token);
}
$this->scanner->expectToken('AS');
$type = $this->scanner->fetchNextToken();
try {
$typeValue = PropertyType::valueFromName($type);
} catch (InvalidArgumentException $e) {
throw new InvalidQueryException("Syntax error: attempting to cast to an invalid type '$type'");
}
$this->scanner->expectToken(')');
try {
$token = $this->valueConverter->convertType($token, $typeValue, PropertyType::STRING);
} catch (Exception $e) {
throw new InvalidQueryException("Syntax error: attempting to cast string '$token' to type '$type'");
}
return $token;
}
/**
* 6.7.34 Literal
* Parse an SQL2 literal value.
*
* @return mixed
*/
protected function parseLiteralValue()
{
$token = $this->scanner->fetchNextToken();
if ($this->scanner->tokenIs($token, 'CAST')) {
return $this->parseCastLiteral($token);
}
$quoteString = in_array($token[0], ['"', "'"], true);
if ($quoteString) {
$quotesUsed = $token[0];
$token = substr($token, 1, -1);
// Unescape quotes
$token = str_replace('\\'.$quotesUsed, $quotesUsed, $token);
$token = str_replace("''", "'", $token);
if (preg_match('/^\d{4}-\d{2}-\d{2}( \d{2}:\d{2}:\d+)?$/', $token)) {
if (preg_match('/^\d{4}-\d{2}-\d{2}$/', $token)) {
$token .= ' 00:00:00';
}
$token = DateTime::createFromFormat('Y-m-d H:i:s', $token);
}
} elseif (is_numeric($token)) {
$token = strpos($token, '.') === false ? (int) $token : (float) $token;
} elseif ($token === 'true') {
$token = true;
} elseif ($token === 'false') {
$token = false;
}
return $token;
}
/**
* 6.7.37 Ordering.
*/
protected function parseOrderings()
{
$orderings = [];
$continue = true;
while ($continue) {
$orderings[] = $this->parseOrdering();
if ($this->scanner->tokenIs($this->scanner->lookupNextToken(), ',')) {
$this->scanner->expectToken(',');
} else {
$continue = false;
}
}
return $orderings;
}
/**
* 6.7.38 Order.
*
* @return OrderingInterface
*/
protected function parseOrdering()
{
$operand = $this->parseDynamicOperand();
$token = $this->scanner->lookupNextToken();
if ($this->scanner->tokenIs($token, 'DESC')) {
$this->scanner->expectToken('DESC');
return $this->factory->descending($operand);
}
if ($this->scanner->tokenIs($token, 'ASC') || ',' === $token || '' === $token) {
if ($this->scanner->tokenIs($token, 'ASC')) {
$this->scanner->expectToken('ASC');
}
return $this->factory->ascending($operand);
}
throw new InvalidQueryException("Syntax error: invalid ordering in '{$this->sql2}'");
}
/**
* 6.7.39 Column.
*
* Scan the SQL2 columns definitions and return data arrays to convert to
* columns once the FROM is parsed.
*
* @return array of array
*/
protected function scanColumns()
{
// Wildcard
if ($this->scanner->lookupNextToken() === '*') {
$this->scanner->fetchNextToken();
return [];
}
$columns = [];
$hasNext = true;
while ($hasNext) {
$columns[] = $this->scanColumn();
// Are there more columns?
if ($this->scanner->lookupNextToken() !== ',') {
$hasNext = false;
} else {
$this->scanner->fetchNextToken();
}
}
return $columns;
}
/**
* Build the columns from the scanned column data.
*
* @param array $data
*
* @return ColumnInterface[]
*/
protected function buildColumns($data)
{
$columns = [];
foreach ($data as $col) {
$columns[] = $this->buildColumn($col);
}
return $columns;
}
/**
* Get the next token and make sure to remove the brackets if the token is
* in the [ns:name] notation.
*
* @return string
*/
private function fetchTokenWithoutBrackets()
{
$token = $this->scanner->fetchNextToken();
if (substr($token, 0, 1) === '[' && substr($token, -1) === ']') {
// Remove brackets around the selector name
$token = substr($token, 1, -1);
}
return $token;
}
/**
* Parse something that is expected to be a property identifier.
*
* @param bool $checkSelector whether we need to ensure a valid selector.
*
* @return array with selectorName and propertyName. If no selectorName is
* specified, defaults to $this->defaultSelectorName
*/
private function parseIdentifier($checkSelector = true)
{
$token = $this->fetchTokenWithoutBrackets();
// selector.property
if ($this->scanner->lookupNextToken() === '.') {
$selectorName = $token;
$this->scanner->fetchNextToken();
$propertyName = $this->fetchTokenWithoutBrackets();
} else {
$selectorName = null;
$propertyName = $token;
}
if ($checkSelector) {
$selectorName = $this->ensureSelectorName($selectorName);
}
return [$selectorName, $propertyName];
}
/**
* Add a selector name to the known selector names.
*
* @param string $selectorName
*
* @throws InvalidQueryException
*/
protected function updateImplicitSelectorName($selectorName)
{
if (null === $this->implicitSelectorName) {
$this->implicitSelectorName = $selectorName;
} else {
if (!is_array($this->implicitSelectorName)) {
$this->implicitSelectorName = [$this->implicitSelectorName => $this->implicitSelectorName];
}
if (isset($this->implicitSelectorName[$selectorName])) {
throw new InvalidQueryException("Selector $selectorName is already in use");
}
$this->implicitSelectorName[$selectorName] = $selectorName;
}
}
/**
* Ensure that the parsedName is a valid selector, or return the implicit
* selector if its non-ambigous.
*
* @param string|null $parsedName
*
* @throws InvalidQueryException if there was no explicit selector and
* there is more than one selector available.
*
* @return string the selector to use
*/
protected function ensureSelectorName($parsedName)
{
if (null !== $parsedName) {
if (is_array($this->implicitSelectorName) && !isset($this->implicitSelectorName[$parsedName])
|| !is_array($this->implicitSelectorName) && $this->implicitSelectorName !== $parsedName
) {
throw new InvalidQueryException("Unknown selector $parsedName in '{$this->sql2}'");
}
return $parsedName;
}
if (is_array($this->implicitSelectorName)) {
throw new InvalidQueryException('Need an explicit selector name in join queries');
}
return $this->implicitSelectorName;
}
/**
* Scan a single SQL2 column definition and return an array of information.
*
* @return array
*/
protected function scanColumn()
{
list($selectorName, $propertyName) = $this->parseIdentifier(false);
// AS name
if ($this->scanner->tokenIs($this->scanner->lookupNextToken(), 'AS')) {
$this->scanner->fetchNextToken();
$columnName = $this->scanner->fetchNextToken();
} else {
$columnName = $propertyName;
}
return [$selectorName, $propertyName, $columnName];
}
/**
* Build a single SQL2 column definition.
*
* @param array $data with selector name, property name and column name.
*
* @return ColumnInterface
*/
protected function buildColumn(array $data)
{
list($selectorName, $propertyName, $columnName) = $data;
$selectorName = $this->ensureSelectorName($selectorName);
return $this->factory->column($selectorName, $propertyName, $columnName);
}
}

vendor/phpcr/phpcr-utils/src/PHPCR/Util/QOM/Sql2ToQomQueryConverter.php line 441