def test_match_node_rel(self):
"""
Tests L{QueryEvaluator.match_node_rel} method for L{QueryEvaluator}.
"""
gs = GraphStructure()
q = QueryEvaluator(gs)
attrs1 = {'Label': 'Person', 'Name': 'Alice'}
attrs2 = {'Label': 'Person', 'Name': 'Bob'}
attrs3 = {'Label': 'Person', 'Name': 'John'}
node1 = q.add_node(attrs1)
node2 = q.add_node(attrs2)
node3 = q.add_node(attrs3)
edge_attrs1 = {'rel_type': 'friend'}
edge_attrs2 = {'rel_type': 'friend', 'fam': 'cousin'}
edge1 = q.add_relationship(node1, node2, edge_attrs1)
edge2 = q.add_relationship(node2, node3, edge_attrs2)
edge3 = q.add_relationship(node2, node1, edge_attrs1)
# Test matching with no results
match_lst1 = q.match_node_rel(node1[1], edge_attrs2)
result1 = []
self.assertEqual(match_lst1, result1)
# Test matching with single result
match_lst2 = q.match_node_rel(node2[1], edge_attrs2)
result2 = [(node2[0], node3[0], edge_attrs2)]
self.assertEqual(match_lst2, result2)
# Test matching with multiple result
match_lst3 = q.match_node_rel(node2[1], {'rel_type': 'friend'})
result3 = [(node2[0], node1[0], edge_attrs1),
(node2[0], node3[0], edge_attrs2)]
self.assertEqual(match_lst3, result3)
def test_modify_node(self):
"""
Tests L{QueryEvaluator.modify_node} method for L{QueryEvaluator}.
"""
gs = GraphStructure()
q = QueryEvaluator(gs)
attrs1 = {'Label': 'Person', 'Name': 'Alice'}
attrs2 = {'Label': 'Person', 'Name': 'Bob'}
attrs3 = {'Label': 'Person', 'Name': 'John'}
node1 = q.add_node(attrs1)
node2 = q.add_node(attrs2)
node3 = q.add_node(attrs3)
edge_attrs1 = {'rel_type': 'friend'}
edge_attrs2 = {'rel_type': 'friend', 'fam': 'cousin'}
edge1 = q.add_relationship(node1, node2, edge_attrs1)
edge2 = q.add_relationship(node2, node3, edge_attrs2)
# Tests adding attributes to node
q.modify_node(attrs1, {'Age': '10'}, True)
match_lst1 = q.match_node(attrs1)
result1 = [(node1[0], {
'Label': 'Person',
'Name': 'Alice',
'Age': '10'
})]
self.assertEqual(match_lst1, result1)
# Tests removing attributes to node
q.modify_node(attrs1, {'Age': '10'}, False)
match_lst2 = q.match_node(attrs1)
result2 = [(node1[0], attrs1)]
self.assertEqual(match_lst2, result2)
def test_match_node_project_node(self):
"""
Tests applying a project to a simple match node query for L{QueryEvaluator}.
"""
gs = GraphStructure()
q = QueryEvaluator(gs)
proj = Project()
attrs1 = {'Label': 'Person', 'Name': 'Alice', 'Salary': '500'}
attrs2 = {'Label': 'Person', 'Name': 'Bob', 'Salary': '1000'}
attrs3 = {'Label': 'Person', 'Name': 'John', 'Salary': '20000'}
attrs4 = {'Label': 'Person', 'Name': 'Donnie', 'Salary': '100000000'}
node1 = q.add_node(attrs1)
node2 = q.add_node(attrs2)
node3 = q.add_node(attrs3)
node4 = q.add_node(attrs4)
# Test matching all nodes and then projecting to a single attribute.
match_lst1 = q.match_node({'Label': 'Person'})
# Project on salary field.
filtered_lst1 = proj.project(match_lst1, ['Salary'])
self.assertEqual(filtered_lst1, [{
'Salary': '500'
}, {
'Salary': '1000'
}, {
'Salary': '20000'
}, {
'Salary': '100000000'
}])
# Test matching a single node and then projecting to a single attribute.
match_lst2 = q.match_node({'Name': 'Alice'})
filtered_lst2 = proj.project(match_lst2, ['Salary'])
self.assertEqual(filtered_lst2, [{'Salary': '500'}])
def test_modify_rel(self):
"""
Test L{QueryEvaluator.modify_rel} method for L{QueryEvaluator}.
"""
gs = GraphStructure()
q = QueryEvaluator(gs)
attrs1 = {'Label': 'Person', 'Name': 'Alice'}
attrs2 = {'Label': 'Person', 'Name': 'Bob'}
attrs3 = {'Label': 'Person', 'Name': 'John'}
node1 = q.add_node(attrs1)
node2 = q.add_node(attrs2)
node3 = q.add_node(attrs3)
edge_attrs1 = {'rel_type': 'friend'}
edge_attrs2 = {'rel_type': 'friend', 'fam': 'cousin'}
edge1 = q.add_relationship(node1, node2, edge_attrs1)
edge2 = q.add_relationship(node2, node3, edge_attrs2)
# Tests adding attributes to relationship
q.modify_rel(edge_attrs2, {'like': 'no'}, True)
match_lst1 = q.match_rel(edge_attrs2)
result1 = [(node2[0], node3[0], {
'rel_type': 'friend',
'fam': 'cousin',
'like': 'no'
})]
self.assertEqual(sorted(match_lst1), sorted(result1))
# Tests deleting attributes to relationship
q.modify_rel(edge_attrs2, {'like': 'no'}, False)
match_lst2 = q.match_rel(edge_attrs2)
result2 = [(node2[0], node3[0], edge_attrs2)]
self.assertEqual(sorted(match_lst2), sorted(result2))
def test_delete_rel(self):
"""
Tests L{QueryEvaluator.delete_rel} method for L{QueryEvaluator}.
"""
gs = GraphStructure()
q = QueryEvaluator(gs)
attrs1 = {'Label': 'Person', 'Name': 'Alice'}
attrs2 = {'Label': 'Person', 'Name': 'Bob'}
attrs3 = {'Label': 'Person', 'Name': 'John'}
node1 = q.add_node(attrs1)
node2 = q.add_node(attrs2)
node3 = q.add_node(attrs3)
edge_attrs1 = {'rel_type': 'friend'}
edge_attrs2 = {'rel_type': 'friend', 'fam': 'cousin'}
edge1 = q.add_relationship(node1, node2, edge_attrs1)
edge2 = q.add_relationship(node2, node3, edge_attrs2)
# Tests deleting no relationship
q.delete_rel({'rel_type': 'friend', 'fam': 'dad'})
match_lst1 = q.match({}, {}, {})
result1 = [(node1[0], node2[0], edge_attrs1),
(node2[0], node3[0], edge_attrs2)]
self.assertEqual(match_lst1, result1)
# Tests deleting relationship
q.delete_rel(edge_attrs1)
match_lst2 = q.match({}, {}, {})
result2 = []
self.assertEqual(match_lst2, result2)
def __init__(self, flag, verbose):
"""
Initializes the graph database by reading persisted data on disk
and setting up the internal in-memory graph file.
"""
print "Welcome to microDB!"
self.gs = GraphStructure()
self.gstorage = GraphStorage(self.gs)
# Loads data on disk
self.graph_file = 'graph_file'
self.id_file = 'id_file'
self.load_persistent_data()
# Stores verbose flag
self.verbose = verbose
# If flag is set, need to execute commands in file that user passed.
if flag:
print "Loading batch file..."
BatchExecute(self.gs, sys.argv[1])
print "Done executing batch file!"
def test_match_node(self):
"""
Tests L{QueryEvaluator.match_node} method for L{QueryEvaluator}.
"""
gs = GraphStructure()
q = QueryEvaluator(gs)
attrs1 = {'Label': 'Person', 'Name': 'Alice'}
attrs2 = {'Label': 'Person', 'Name': 'Bob'}
attrs3 = {'Label': 'Person', 'Name': 'John'}
node1 = q.add_node(attrs1)
node2 = q.add_node(attrs2)
node3 = q.add_node(attrs3)
# Test matching all node
match_lst1 = q.match_node({'Label': 'Person'})
self.assertEqual(match_lst1, [node1, node2, node3])
# Test matching single node
match_lst2 = q.match_node({'Name': 'Alice'})
self.assertEqual(match_lst2, [node1])
def test_multi_match(self):
"""
Test L{QueryEvaluator.multi_match} method for L{QueryEvaluator}.
"""
gs = GraphStructure()
q = QueryEvaluator(gs)
attrs1 = {'Label': 'Person', 'Name': 'Alice'}
attrs2 = {'Label': 'Person', 'Name': 'Bob'}
attrs3 = {'Label': 'Person', 'Name': 'John'}
attrs4 = {'Label': 'Person', 'Name': 'Rick'}
attrs5 = {'Label': 'Person', 'Name': 'Cat'}
node1 = q.add_node(attrs1)
node2 = q.add_node(attrs2)
node3 = q.add_node(attrs3)
node4 = q.add_node(attrs4)
node5 = q.add_node(attrs5)
edge_attrs1 = {'rel_type': 'friend'}
edge_attrs2 = {'rel_type': 'friend', 'fam': 'cousin'}
edge_attrs3 = {'rel_type': 'dad'}
edge_attrs4 = {'rel_type': 'mom'}
edge1 = q.add_relationship(node1, node2, edge_attrs1)
edge2 = q.add_relationship(node2, node3, edge_attrs2)
edge3 = q.add_relationship(node3, node4, edge_attrs3)
edge4 = q.add_relationship(node4, node5, edge_attrs4)
# Test no match for multiple length query
result1 = q.multi_match([attrs1, attrs2, attrs3],
[edge_attrs3, edge_attrs1])
self.assertEqual(result1, None)
# Test single match for multiple length query
result2 = q.multi_match([attrs1, attrs2, attrs3],
[edge_attrs1, edge_attrs2])
self.assertEqual(result2, [(1, 3)])
# Tests many matches for multiple length query
result3 = q.multi_match([{
'Label': 'Person'
}, {
'Label': 'Person'
}], [edge_attrs1])
self.assertEqual(result3, [edge1, edge2])
# Test all matches for multiple length query
result4 = q.multi_match([{}, {}], [{}])
self.assertEqual(result4, [edge1, edge2, edge3, edge4])
def test_add_relationship(self):
"""
Tests L{QueryEvaluator.add_relationship} method for L{QueryEvaluator}.
"""
gs = GraphStructure()
q = QueryEvaluator(gs)
attrs1 = {'Label': 'Person', 'Name': 'Alice'}
attrs2 = {'Label': 'Person', 'Name': 'Bob'}
attrs3 = {'Label': 'Person', 'Name': 'John'}
node1 = q.add_node(attrs1)
node2 = q.add_node(attrs2)
node3 = q.add_node(attrs3)
edge_attrs1 = {'rel_type': 'friend'}
edge_attrs2 = {'rel_type': 'cousin'}
# Test first edge
edge1 = q.add_relationship(node1, node2, edge_attrs1)
self.assertEqual(edge1, (node1[0], node2[0], edge_attrs1))
# Test second edge
edge2 = q.add_relationship(node2, node3, edge_attrs2)
self.assertEqual(edge2, (node2[0], node3[0], edge_attrs2))
def test_add_node(self):
"""
Tests L{QueryEvaluator.add_node} method of L{QueryEvaluator}.
"""
gs = GraphStructure()
q = QueryEvaluator(gs)
attrs1 = {'Label': 'Person', 'Name': 'You'}
attrs2 = {'Label': 'Person', 'Name': 'Me'}
attrs3 = {'Label': 'Person', 'Name': 'She', 'Age': 23}
# Test first node
node1 = q.add_node(attrs1)
self.assertEqual(node1[0], 1)
self.assertEqual(node1[1], attrs1)
# Test second node
node2 = q.add_node(attrs2)
self.assertEqual(node2[0], 2)
self.assertEqual(node2[1], attrs2)
# Test third node
node3 = q.add_node(attrs3)
self.assertEqual(node3[0], 3)
self.assertEqual(node3[1], attrs3)
def __init__(self, flag, verbose):
"""
Initializes the graph database by reading persisted data on disk
and setting up the internal in-memory graph file.
"""
print "Welcome to microDB!"
self.gs = GraphStructure()
self.gstorage = GraphStorage(self.gs)
# Loads data on disk
self.graph_file = 'graph_file'
self.id_file = 'id_file'
self.load_persistent_data()
# Stores verbose flag
self.verbose = verbose
# If flag is set, need to execute commands in file that user passed.
if flag:
print "Loading batch file..."
BatchExecute(self.gs, sys.argv[1])
print "Done executing batch file!"
def test_match_node_predicate(self):
"""
Tests applying a predicate to a simple match node query for L{QueryEvaluator}.
"""
gs = GraphStructure()
q = QueryEvaluator(gs)
pred = Predicates(gs)
attrs1 = {'Label': 'Person', 'Name': 'Alice', 'Salary': '500'}
attrs2 = {'Label': 'Person', 'Name': 'Bob', 'Salary': '1000'}
attrs3 = {'Label': 'Person', 'Name': 'John', 'Salary': '20000'}
attrs4 = {'Label': 'Person', 'Name': 'Donnie', 'Salary': '100000000'}
node1 = q.add_node(attrs1)
node2 = q.add_node(attrs2)
node3 = q.add_node(attrs3)
node4 = q.add_node(attrs4)
# Test matching all nodes and then filtering with a predicate
match_lst1 = q.match_node({'Label': 'Person'})
# The predicate is salary > 2000
filtered_lst1 = pred.filter(match_lst1, 'Salary', '2000', '>')
self.assertEqual(filtered_lst1, [node3, node4])
# Test matching a single node and then filtering with a predicate
match_lst2 = q.match_node({'Name': 'Alice'})
filtered_lst2 = pred.filter(match_lst2, 'Salary', '500', '=')
self.assertEqual(filtered_lst2, [node1])
class StartDatabase:
"""
Class runs the entire graph database in the terminal and manages
the entire interaction from user input to printing out data.
"""
def __init__(self, flag, verbose):
"""
Initializes the graph database by reading persisted data on disk
and setting up the internal in-memory graph file.
"""
print "Welcome to microDB!"
self.gs = GraphStructure()
self.gstorage = GraphStorage(self.gs)
# Loads data on disk
self.graph_file = 'graph_file'
self.id_file = 'id_file'
self.load_persistent_data()
# Stores verbose flag
self.verbose = verbose
# If flag is set, need to execute commands in file that user passed.
if flag:
print "Loading batch file..."
BatchExecute(self.gs, sys.argv[1])
print "Done executing batch file!"
def load_persistent_data(self):
"""
Loads persisted data on disk, if it exists, into our GraphStructure
object.
"""
print "Loading database from disk..."
if Utilities.files_exist(self.graph_file, self.id_file):
self.gstorage.load_graph(self.graph_file, self.id_file)
print "Finished loading database from disk."
else:
print "No files to load from."
def has_Errors(self, parser):
"""
This method checks the command entered by the user
for any errors and if there are any, don't create
a linker.
@type parser: Object
@param parser: Parser instance used to check for errors
@rtype: Boolean
@return: Boolean indicating whether errors exist
"""
# First check if state machine produced any error
# If errors exist, then don't create linker
if (parser.get_Errors()):
print "State machine Error"
return True
# Create error class instance
errorCheck = Error_Checking(parser.get_object_list())
# If there are errors, don't create linker
if errorCheck.check_commands():
print "Command state Error"
return True
return False
def run(self):
"""
Keeps the graph database and continously running in the terminal
and parses the input.
"""
while True:
if verbose:
# Prints out the graph structure for verbose output
self.gs.display()
commands = []
#sys.stdout.write(">>> ")
command = raw_input(">>> ")
while True:
#command = raw_input(">>> ")
if (len(command) != 0 and command[-1] == ";"):
commands.append(command)
break
commands.append(command)
command = raw_input("... ")
command_str = " ".join(commands)
# Start the parser and parse the commands
if (command_str[-1] == ";"):
real_command = command_str[:-1] + " ;" # need to add space for parser
parser = Parser(real_command)
parser.run()
else:
print "ERROR INVALID QUERY"
# Check if user entered any errors in query.
# If there are no errors, then create linker
if (not (self.has_Errors(parser))):
linker = Linker(parser.get_object_list(), self.gs)
linker.execute()
# Else, print the error
else:
print "Invalid Query"
def exit(self):
"""
Persists the graph data and exits the graph database.
"""
print
self.persist_data()
print "Exiting microDB..."
def persist_data(self):
"""
Persists the GraphStructure object onto disk.
"""
print "Writing database back to disk..."
self.gstorage.write_graph(self.graph_file, self.id_file)
def create_visual(self):
"""
Creates a diagram that represents the nodes and
edges of our graph database.
"""
# Set up visual
newVis = VisualizeGraph(self.gs)
newVis.draw_graph()
if __name__ == '__main__':
gs = GraphStructure()
# q = QueryEvaluator()
# node = q.add_node({'Label' : 'Person', 'Name' : 'You'})
# node2 = q.add_node({'Label' : 'Person', 'Name' : 'Sreeni'})
# node3 = q.add_node({'Label' : 'Alien', 'Gender' : 'Unknown'})
# node4 = q.add_node({'Label' : 'neo:Database:NoSql:Graph', 'Name' : 'SARS Database'})
# LIKE_rel = q.add_relationship(node, node4, {'rel' : 'LIKES', 'rel' : 'boss'})
# print node
# print node4
# print LIKE_rel
# print q.g.nodes(data=True)
# print q.g.edges(data=True)
# print q.match({'Label' : 'Person'}, None, None)
# print q.match(None, None, {'Rel_Type' : 'LIKES'})
# q.set_rel_attrs(node[0], node4[0], {'Rel_Type' : 'LOVES'})
# print q.get_rel_attrs(node[0], node4[0])
class StartDatabase:
"""
Class runs the entire graph database in the terminal and manages
the entire interaction from user input to printing out data.
"""
def __init__(self, flag, verbose):
"""
Initializes the graph database by reading persisted data on disk
and setting up the internal in-memory graph file.
"""
print "Welcome to microDB!"
self.gs = GraphStructure()
self.gstorage = GraphStorage(self.gs)
# Loads data on disk
self.graph_file = 'graph_file'
self.id_file = 'id_file'
self.load_persistent_data()
# Stores verbose flag
self.verbose = verbose
# If flag is set, need to execute commands in file that user passed.
if flag:
print "Loading batch file..."
BatchExecute(self.gs, sys.argv[1])
print "Done executing batch file!"
def load_persistent_data(self):
"""
Loads persisted data on disk, if it exists, into our GraphStructure
object.
"""
print "Loading database from disk..."
if Utilities.files_exist(self.graph_file, self.id_file):
self.gstorage.load_graph(self.graph_file, self.id_file)
print "Finished loading database from disk."
else:
print "No files to load from."
def has_Errors(self, parser):
"""
This method checks the command entered by the user
for any errors and if there are any, don't create
a linker.
@type parser: Object
@param parser: Parser instance used to check for errors
@rtype: Boolean
@return: Boolean indicating whether errors exist
"""
# First check if state machine produced any error
# If errors exist, then don't create linker
if (parser.get_Errors()):
print "State machine Error"
return True
# Create error class instance
errorCheck = Error_Checking(parser.get_object_list())
# If there are errors, don't create linker
if errorCheck.check_commands():
print "Command state Error"
return True
return False
def run(self):
"""
Keeps the graph database and continously running in the terminal
and parses the input.
"""
while True:
if verbose:
# Prints out the graph structure for verbose output
self.gs.display()
commands = []
#sys.stdout.write(">>> ")
command = raw_input(">>> ")
while True:
#command = raw_input(">>> ")
if (len(command) != 0 and command[-1] == ";"):
commands.append(command)
break
commands.append(command)
command = raw_input("... ")
command_str = " ".join(commands)
# Start the parser and parse the commands
if (command_str[-1] == ";"):
real_command = command_str[:-1] + " ;" # need to add space for parser
parser = Parser(real_command)
parser.run()
else:
print "ERROR INVALID QUERY"
# Check if user entered any errors in query.
# If there are no errors, then create linker
if (not(self.has_Errors(parser))):
linker = Linker(parser.get_object_list(), self.gs)
linker.execute()
# Else, print the error
else:
print "Invalid Query"
def exit(self):
"""
Persists the graph data and exits the graph database.
"""
print
self.persist_data()
print "Exiting microDB..."
def persist_data(self):
"""
Persists the GraphStructure object onto disk.
"""
print "Writing database back to disk..."
self.gstorage.write_graph(self.graph_file, self.id_file)
# Stores nodes and edges in our set data structure
line = line.strip().split('\t')
node1, node2 = line[0], line[1]
node.add(node1)
node.add(node2)
edge.add((node1, node2))
f.close()
# Stores return value when a node is added
node_dict = {}
# Adds node and edges between the nodes in our graph database
for n in node:
n1 = self.q_eval.add_node({'id' : n})
node_dict[n] = n1
for node1,node2 in edge:
self.q_eval.add_relationship(node_dict[node1], node_dict[node2], {})
# Saves the file to disk
self.gstorage.write_graph(self.graph_file, self.id_file)
if __name__ == '__main__':
file_name = 'Wiki-Vote.txt'
gs = GraphStructure()
data = LoadData(gs)
data.load_text_file(file_name)