class IndexBlock(object):
def __init__(self, location, index_name, index_directory):
super(IndexBlock, self).__init__()
self._location = location
self._index_name = index_name
self._index_directory = index_directory
self._index_nodes = []
self._parent_block = -1
self._max_size = 2048
self._size = 0
self._dummy_node = None
def create_dummy_node(self):
self._dummy_node = DummyNode()
#def update_child_blocks(self, fd):
def is_leaf(self):
for node in self._index_nodes:
if node.get_index_block_pointer() != -1:
return False
if self._dummy_node.get_index_block_pointer() != 1:
return False
return True
def delete_index_node(self, index_node):
i = 0
while i < len(self._index_nodes):
if self._index_nodes[i].get_key() == index_node.get_key() and self._index_nodes[i].get_value() == index_node.get_value():
self._index_nodes.pop(i)
break
i += 1
def add_index_node(self, index_node):
self._index_nodes.append(index_node)
self._index_nodes = sorted(self._index_nodes, key = lambda index_node: index_node.get_key())
def get_location(self):
return self._location
def set_location(self, location):
self._location = location
def get_index_nodes(self):
return self._index_nodes
def get_parent_block(self):
return self._parent_block
def set_parent_block(self, parent):
self._parent_block = parent
def get_dummy_node_pointer(self):
return self._dummy_node.get_index_block_pointer()
def get_size(self):
data = dumps(self)
return len(data) + 4
def set_dummy_node_pointer(self, pointer):
self._dummy_node.set_index_block_pointer(pointer)
def create_dummy_node(self):
self._dummy_node = DummyNode()