def create_location_relationship(manager, location_handle_id, other_handle_id,
rel_type):
"""
Makes relationship between the two nodes and returns the relationship.
If a relationship is not possible NoRelationshipPossible exception is
raised.
"""
other_meta_type = get_node_meta_type(manager, other_handle_id)
if other_meta_type == 'Location' and rel_type == 'Has':
return _create_relationship(manager, location_handle_id,
other_handle_id, rel_type)
raise exceptions.NoRelationshipPossible(location_handle_id, 'Location',
other_handle_id, other_meta_type,
rel_type)
def create_physical_relationship(manager, physical_handle_id, other_handle_id,
rel_type):
"""
Makes relationship between the two nodes and returns the relationship.
If a relationship is not possible NoRelationshipPossible exception is
raised.
"""
other_meta_type = get_node_meta_type(manager, other_handle_id)
if other_meta_type == 'Physical':
if rel_type == 'Has' or rel_type == 'Connected_to':
return _create_relationship(manager, physical_handle_id,
other_handle_id, rel_type)
elif other_meta_type == 'Location' and rel_type == 'Located_in':
return _create_relationship(manager, physical_handle_id,
other_handle_id, rel_type)
raise exceptions.NoRelationshipPossible(physical_handle_id, 'Physical',
other_handle_id, other_meta_type,
rel_type)
def create_logical_relationship(manager, logical_handle_id, other_handle_id,
rel_type):
"""
Makes relationship between the two nodes and returns the relationship.
If a relationship is not possible NoRelationshipPossible exception is
raised.
"""
other_meta_type = get_node_meta_type(manager, other_handle_id)
if rel_type == 'Depends_on':
if other_meta_type == 'Logical' or other_meta_type == 'Physical':
return _create_relationship(manager, logical_handle_id,
other_handle_id, rel_type)
elif rel_type == 'Part_of':
if other_meta_type == 'Physical':
return _create_relationship(manager, logical_handle_id,
other_handle_id, rel_type)
raise exceptions.NoRelationshipPossible(logical_handle_id, 'Logical',
other_handle_id, other_meta_type,
rel_type)
def create_relation_relationship(manager, relation_handle_id, other_handle_id,
rel_type):
"""
Makes relationship between the two nodes and returns the relationship.
If a relationship is not possible NoRelationshipPossible exception is
raised.
"""
other_meta_type = get_node_meta_type(manager, other_handle_id)
if other_meta_type == 'Logical':
if rel_type in ['Uses', 'Provides']:
return _create_relationship(manager, relation_handle_id,
other_handle_id, rel_type)
elif other_meta_type == 'Location' and rel_type == 'Responsible_for':
return _create_relationship(manager, relation_handle_id,
other_handle_id, rel_type)
elif other_meta_type == 'Physical':
if rel_type in ['Owns', 'Provides']:
return _create_relationship(manager, relation_handle_id,
other_handle_id, rel_type)
raise exceptions.NoRelationshipPossible(relation_handle_id, 'Relation',
other_handle_id, other_meta_type,
rel_type)
def create_relationship(manager, handle_id, other_handle_id, rel_type):
"""
Makes a relationship from node to other_node depending on which
meta_type the nodes are. Returns the relationship or raises
NoRelationshipPossible exception.
"""
meta_type = get_node_meta_type(manager, handle_id)
if meta_type == 'Location':
return create_location_relationship(manager, handle_id,
other_handle_id, rel_type)
elif meta_type == 'Logical':
return create_logical_relationship(manager, handle_id, other_handle_id,
rel_type)
elif meta_type == 'Relation':
return create_relation_relationship(manager, handle_id,
other_handle_id, rel_type)
elif meta_type == 'Physical':
return create_physical_relationship(manager, handle_id,
other_handle_id, rel_type)
other_meta_type = get_node_meta_type(manager, other_handle_id)
raise exceptions.NoRelationshipPossible(handle_id, meta_type,
other_handle_id, other_meta_type,
rel_type)