/**
* Creates a syntax tree for an arry or an epObject
* @param array|epObject &$v
* @param string $prefix
* @return false|epQueryNode
*/
protected function &_createSyntaxNodes(&$v, $prefix)
{
$nodes = array();
// create expression for primitve vars from array or object
if (!($exprs = $this->_getPrimitiveExprs($v, $prefix))) {
return $nodes;
}
// create comparison '=' nodes
foreach ($exprs as $path => $value) {
// insert path into tree
if (!$this->pm->insertPath($path)) {
// should not happen
continue;
}
// create a comparison node
if (!($node = new epQueryNode(EPQ_N_EXPR_COMPARISON))) {
// should not happen
continue;
}
// set operator '='
$node->setParam('op', '=');
// create left hand side variable
if (!($left = new epQueryNode(EPQ_N_VARIABLE))) {
// should not happen
continue;
}
// set param path
$left->setParam('path', $path);
// add left hand side
$node->addChild($left, 'left');
// create right hand side value
if (!($right = new epQueryNode(EPQ_N_STRING))) {
// should not happen
continue;
}
$right->setParam('val', $value);
// add left hand side
$node->addChild($right, 'right');
// collect node
$nodes[] = $node;
}
return $nodes;
}
