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Direktori : /home2/selectio/public_html/limpiar.in.net/vendor/mtdowling/jmespath.php/src/ |
Current File : /home2/selectio/public_html/limpiar.in.net/vendor/mtdowling/jmespath.php/src/TreeInterpreter.php |
<?php namespace JmesPath; /** * Tree visitor used to evaluates JMESPath AST expressions. */ class TreeInterpreter { /** @var callable */ private $fnDispatcher; /** * @param callable|null $fnDispatcher Function dispatching function that accepts * a function name argument and an array of * function arguments and returns the result. */ public function __construct(callable $fnDispatcher = null) { $this->fnDispatcher = $fnDispatcher ?: FnDispatcher::getInstance(); } /** * Visits each node in a JMESPath AST and returns the evaluated result. * * @param array $node JMESPath AST node * @param mixed $data Data to evaluate * * @return mixed */ public function visit(array $node, $data) { return $this->dispatch($node, $data); } /** * Recursively traverses an AST using depth-first, pre-order traversal. * The evaluation logic for each node type is embedded into a large switch * statement to avoid the cost of "double dispatch". * @return mixed */ private function dispatch(array $node, $value) { $dispatcher = $this->fnDispatcher; switch ($node['type']) { case 'field': if (is_array($value) || $value instanceof \ArrayAccess) { return isset($value[$node['value']]) ? $value[$node['value']] : null; } elseif ($value instanceof \stdClass) { return isset($value->{$node['value']}) ? $value->{$node['value']} : null; } return null; case 'subexpression': return $this->dispatch( $node['children'][1], $this->dispatch($node['children'][0], $value) ); case 'index': if (!Utils::isArray($value)) { return null; } $idx = $node['value'] >= 0 ? $node['value'] : $node['value'] + count($value); return isset($value[$idx]) ? $value[$idx] : null; case 'projection': $left = $this->dispatch($node['children'][0], $value); switch ($node['from']) { case 'object': if (!Utils::isObject($left)) { return null; } break; case 'array': if (!Utils::isArray($left)) { return null; } break; default: if (!is_array($left) || !($left instanceof \stdClass)) { return null; } } $collected = []; foreach ((array) $left as $val) { $result = $this->dispatch($node['children'][1], $val); if ($result !== null) { $collected[] = $result; } } return $collected; case 'flatten': static $skipElement = []; $value = $this->dispatch($node['children'][0], $value); if (!Utils::isArray($value)) { return null; } $merged = []; foreach ($value as $values) { // Only merge up arrays lists and not hashes if (is_array($values) && isset($values[0])) { $merged = array_merge($merged, $values); } elseif ($values !== $skipElement) { $merged[] = $values; } } return $merged; case 'literal': return $node['value']; case 'current': return $value; case 'or': $result = $this->dispatch($node['children'][0], $value); return Utils::isTruthy($result) ? $result : $this->dispatch($node['children'][1], $value); case 'and': $result = $this->dispatch($node['children'][0], $value); return Utils::isTruthy($result) ? $this->dispatch($node['children'][1], $value) : $result; case 'not': return !Utils::isTruthy( $this->dispatch($node['children'][0], $value) ); case 'pipe': return $this->dispatch( $node['children'][1], $this->dispatch($node['children'][0], $value) ); case 'multi_select_list': if ($value === null) { return null; } $collected = []; foreach ($node['children'] as $node) { $collected[] = $this->dispatch($node, $value); } return $collected; case 'multi_select_hash': if ($value === null) { return null; } $collected = []; foreach ($node['children'] as $node) { $collected[$node['value']] = $this->dispatch( $node['children'][0], $value ); } return $collected; case 'comparator': $left = $this->dispatch($node['children'][0], $value); $right = $this->dispatch($node['children'][1], $value); if ($node['value'] == '==') { return Utils::isEqual($left, $right); } elseif ($node['value'] == '!=') { return !Utils::isEqual($left, $right); } else { return self::relativeCmp($left, $right, $node['value']); } case 'condition': return Utils::isTruthy($this->dispatch($node['children'][0], $value)) ? $this->dispatch($node['children'][1], $value) : null; case 'function': $args = []; foreach ($node['children'] as $arg) { $args[] = $this->dispatch($arg, $value); } return $dispatcher($node['value'], $args); case 'slice': return is_string($value) || Utils::isArray($value) ? Utils::slice( $value, $node['value'][0], $node['value'][1], $node['value'][2] ) : null; case 'expref': $apply = $node['children'][0]; return function ($value) use ($apply) { return $this->visit($apply, $value); }; default: throw new \RuntimeException("Unknown node type: {$node['type']}"); } } /** * @return bool */ private static function relativeCmp($left, $right, $cmp) { if (!(is_int($left) || is_float($left)) || !(is_int($right) || is_float($right))) { return false; } switch ($cmp) { case '>': return $left > $right; case '>=': return $left >= $right; case '<': return $left < $right; case '<=': return $left <= $right; default: throw new \RuntimeException("Invalid comparison: $cmp"); } } }