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clause_generator.py
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clause_generator.py
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class Clause_generator():
def __init__(self):
self.create_clause = "create"
self.vertex_clause = "({0}:{1} {2})"
self.vertex_clause_without_prop = "({0}:{1})"
self.edge_clause = "-[:{0} {1}]->"
self.edge_clause_without_prop = "-[:{0}]->"
self.end_clause = ";"
self.continuous_match_clause = "Continuously match"
self.sep_clause = ","
self.tmp = None
self.file = "file \"{0}\""
#传入一个字典,然后构建properties
def construct_prop(self, dic):
props = []
for key in dic.keys() :
if isinstance(dic[key], str):
value = '\"'+dic[key]+'\"'
else:
value = str(dic[key])
props.append(key + ':' + value)
return '{' + ','.join(props) + '}'
def construct_vertex(self, id, type, prop=None):
if prop is None:
vertex = self.vertex_clause_without_prop.format(id, type)
else:
props = self.construct_prop(prop)
vertex = self.vertex_clause.format(id, type, props)
return vertex
def construct_edge(self,
from_id, from_type,
edge_type,
to_id, to_type,
from_prop = None, edge_prop = None, to_prop = None):
from_vertex = self.construct_vertex(from_id, from_type, from_prop)
to_vertex = self.construct_vertex(to_id, to_type, to_prop)
if edge_prop is None:
edge = self.edge_clause_without_prop.format(edge_type)
else:
props = self.construct_prop(edge_prop)
edge = self.edge_clause.format(edge_type, props)
return from_vertex + edge + to_vertex
def add_vertex(self, id, type, prop=None):
vertex = self.construct_vertex(id, type, prop)
if self.tmp is None:
self.tmp = vertex
else:
self.tmp = self.tmp + self.sep_clause + vertex
def create_vertex(self):
if self.tmp is None:
return ';'
return_clause = self.create_clause + ' ' + self.tmp + self.end_clause
self.tmp = None
return return_clause
def add_edge(self,
from_id, from_type,
edge_type,
to_id, to_type,
from_prop = None, edge_prop = None, to_prop = None):
edge = self.construct_edge(from_id, from_type, edge_type, to_id, to_type, from_prop, edge_prop, to_prop)
if self.tmp is None:
self.tmp = edge
else:
self.tmp = self.tmp + self.sep_clause + edge
def create_edge(self):
if self.tmp is None:
return ';'
return_clause = self.create_clause + ' ' + self.tmp + self.end_clause
self.tmp = None
return return_clause
def add_match_edge(self,
from_var, from_type,
edge_type,
to_var, to_type):
edge = self.construct_edge(from_var, from_type, edge_type, to_var, to_type)
if self.tmp is None:
self.tmp = edge
else:
self.tmp = self.tmp + self.sep_clause + edge
def create_continuous_edge(self, filename):
if self.tmp is None:
return ';'
return_clause = self.continuous_match_clause + ' ' + self.tmp + ' ' + self.file.format(filename) + ' ' + self.end_clause
self.tmp = None
return return_clause
class Variable_generator():
def __init__(self):
self.count = 0
def get_variable(self):
re = 'n' + str(self.count)
self.count += 1
return re