esxparser/parser.py at master · mvetsch/esxparser · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
#!/bin/python


"""
grammar:
	S -> datasets eof
	datasets -> dataset datasets
	datasets -> epsilon
	dataset -> ( ident ) content
	content -> [ q ]
	content ->  { data }
	q -> q , q
	q -> content
	data-> assignment data
	data-> epsilon
	assignment -> ident = value,
	value -> string
	value -> ident
	value -> dataset
	value -> < ident >

"""

from lexer import *

class esxparser(object):
	def __init__(self, lexer):
		self.lexer = lexer
		self.nxtToken = self.lexer.getToken()

	def isType(self, token, tokentype):
		if not isinstance(token, tokentype):
			raise Exception("parse error , Expected another Token than -> " + str(token))


	def token(self):
		self.actToken = self.nxtToken
		self.nxtToken = self.lexer.getToken()
		return self.actToken

	def nextToken(self):
		return self.nxtToken

	def S(self):
		r = self.datasets()
		self.isType(self.token(), EOFToken)
		return r

	def datasets(self):
		resultList = []

		resultList.append(self.dataset())

		if isinstance(self.nxtToken, OpenBracketToken):
			resultList.extend(self.datasets())

		return resultList

	def dataset(self):
		result = {}
		self.isType(self.token(), OpenBracketToken)
		t = self.token()
		self.isType(t, IdentifierToken)
		result['__name'] = str(t)
		self.isType(self.token(), CloseBracketToken)

		self.content(result)
		return result

	def content(self, result):

		t = self.nextToken()
		if isinstance(t, IdentifierToken):
			if 'null' == str(t):
				self.token()
				return

		if isinstance(t, OpenArrayBracketToken) :
			self.token()
			result['array'] = self.q()
			self.isType(self.token(), CloseArrayBracketToken)
			return

		if isinstance(t, OpenBracketToken):
			result['dataset'] = self.dataset()
			return


		self.isType(t, OpenCurlyBracketToken)
		self.token()

		self.data(result)

		self.isType(self.token(), CloseCurlyBracketToken)

		return result

	def q(self):
		result = []
		index = 0

		while not isinstance (self.nextToken(), CloseArrayBracketToken):
			result.append({ })
			self.content(result[index])

			if isinstance(self.nextToken(), CommaToken):
				index += 1
				t = self.token()

		return result

	def data(self, result):

		ide = self.token()
		self.isType(ide, IdentifierToken)
		self.isType(self.token(), AssignmentToken)

		result[str(ide)] = self.value()

		self.isType(self.token(), CommaToken)

		if isinstance(self.nextToken(), IdentifierToken):
			self.data(result)

	def value(self):

		t = self.nextToken()

		if isinstance(t, StringToken):
			return str(self.token())

		if isinstance(t, IdentifierToken):
			return self.token()

		if isinstance(t, OpenTagBracketToken):
			self.token()
			ident = self.token()
			self.isType(ident, IdentifierToken)
			self.isType(self.token(), CloseTagBracketToken)
			return '< ' + str(ident) + ' >' ;

		return self.dataset()


def printr(arr, level=0):
	if isinstance(arr, list):
		index = 0
		for map in arr:
			print tab(level)  + str(index) + ' ='
			printr(map, level+1)
			index += 1
		return

	for k, v in arr.iteritems():
		#print v.__class__.__name__  str(len(v))
		if isinstance(v, list):
			print tab(level) + str(k) + ' : '
			for i in range(0, len(v)):
				print tab(level) + str(i) + ' = '
				printr(v[i], level+1)
		elif isinstance(v, dict):
			print tab(level) + str(k) + " : "
			printr(v, level+1)
		else:
			print tab(level) + str(k) + " : " + str(v)

def tab(n):
	return '\t' * n