/**
* Generates SQL statement for -this- node and set up
* aliases for all classes (root class and subclasses)
* @return false|string
* @throws epExceptionQueryPath
*/
protected function _generateSql()
{
// -no- sql for primitive field
if ($this->fm->isPrimitive()) {
// only pass aliases from the parent to children
$this->class2alias = $this->getParent()->getAliases();
return '';
}
// get base a
$base_a = $this->fm->getBase_a();
// get base_b
$base_b = $this->fm->getBase_b();
// get class alias from parent
if (!($class2alias_a = $this->getParent()->getAliases())) {
throw new epExceptionQueryPath("no aliases found from parent node");
return false;
}
// check if spcific class is set. use it only if so.
if ($sc = $this->specificClass()) {
// get class map of specific class
if (!($cm_b = $this->_em()->getClassMap($sc))) {
throw new epExceptionQueryPath("no class map for classes and '{$sc}'");
return false;
}
} else {
// get class map of base b
if (!($cm_b = $this->_em()->getClassMap($base_b))) {
throw new epExceptionQueryPath("no class map for classes and '{$base_b}'");
return false;
}
}
// get relationship table with base_a and base_b
if (!($rt = $this->_em()->getRelationTable($base_a, $base_b))) {
throw new epExceptionQueryPath("no relationship table for classes '{$base_a}' and '{$base_b}'");
return false;
}
$aliases = array();
$aliases[] = '';
// check if we have any children contained
$children_contained = false;
if ($children = $this->getChildren()) {
foreach ($children as $child) {
if ($child->isRoot() && $child->isContained()) {
$aliases[] = $child->getAlias();
$children_contained = true;
}
}
}
$sql = '';
// go through each contained child
foreach ($aliases as $alias) {
// get alias for relationship table
if (!isset($this->table2alias[$rt . '.' . $alias])) {
$rt_alias = $this->_am()->getTableAlias($rt, true);
$this->table2alias[$rt . '.' . $alias] = $rt_alias;
} else {
$rt_alias = $this->table2alias[$rt . '.' . $alias];
}
// generate sql for class_a (including its subclasses)
if ($alias || !$children_contained) {
$sql .= $this->_generateSqlClassA($rt, $rt_alias, $this->fm->getName(), $class2alias_a);
}
// assemble sql for class b and subclasses
$cms_b = array();
// collect all children if no specific class set
if (!$this->specificClass()) {
$cms_b = $cm_b->getChildren(true);
}
array_unshift($cms_b, $cm_b);
foreach ($cms_b as $cm_b_) {
// skip abstract
if ($cm_b_->isAbstract()) {
continue;
}
// get class b name and make alias
$class_b = $cm_b_->getName();
if ($children_contained) {
// @@@ alias key may be in the form of 'ClassName.alias'
// @@@ to differentiate multiple aliases of the same class
if (!isset($this->class2alias[$class_b . '.' . $alias])) {
if (!$alias) {
$alias_b = $this->_am()->getClassAlias($class_b, true);
} else {
$alias_b = $this->class2alias[$class_b . '.'];
$this->_am()->setClassAlias($class_b, $alias_b . $alias);
}
$this->class2alias[$class_b . '.' . $alias] = $alias_b . $alias;
}
$alias_b = $this->class2alias[$class_b . '.' . $alias];
} else {
if (!isset($this->class2alias[$class_b])) {
$alias_b = $this->_am()->getClassAlias($class_b, true);
$this->class2alias[$class_b] = $alias_b;
} else {
$alias_b = $this->class2alias[$class_b];
}
}
// generate sql for class b
if ($alias || !$children_contained) {
$sql .= $this->_generateSqlClassB($rt_alias, $cm_b_->getTable(), $base_b, $class_b, $alias_b, $cm_b_->getOidColumn());
}
}
}
return $sql;
}
/**
* Add field
* @param epFieldMap $field
* @return void
* @access public
*/
public function addField(epFieldMap $field)
{
// check if field is non primitive
if (!$field->isPrimitive()) {
// increase the count of non primitive fields
$this->num_non_primitive++;
// check if the field is composed_of
if ($field->isComposedOf()) {
$this->num_composed_of++;
}
}
// set class map to field map for easy retrieval
$field->setClassMap($this);
$this->fields[$field->getName()] =& $field;
}
/**
* Checks if the value to be set matches the type set in the field map
* @param epObject|string $value The value to be set
* @param epFieldMap $fm The field map for the value
* @return bool
*/
protected function _typeMatches($value, $fm)
{
// no check if no manager
if (!$this->ep_m) {
return true;
}
// no checking on primitve, ignore false|null|empty, and non-epObject
if ($fm->isPrimitive() || !$value) {
// always true
return true;
}
// epObject
if ($value instanceof epObject) {
return $this->_isClassOf($this->ep_m->getClass($value), $fm->getClass());
} else {
if (is_array($value) || $value instanceof epArray) {
foreach ($value as $k => $v) {
if (!$v instanceof epObject) {
continue;
}
if (!$this->_isClassOf($this->ep_m->getClass($v), $fm->getClass())) {
return false;
}
}
return true;
}
}
return true;
}