Source Code for Module Products.ZenUtils.xmlutils

 1  ############################################################################## 
 2  #  
 3  # Copyright (C) Zenoss, Inc. 2007, all rights reserved. 
 4  #  
 5  # This content is made available according to terms specified in 
 6  # License.zenoss under the directory where your Zenoss product is installed. 
 7  #  
 8  ############################################################################## 
 9   
10   
11  from lxml import etree 
12   
13 -class XsdValidator(object): 
14      """ 
15      This validator uses lxml to validate XML files against schemas defined by 
16      XSD files. 
17      """ 
18   
19 -    def __init__(self, xsd_path): 
20          self.xsd_path = xsd_path 
21          self.load_xsd(self.xsd_path) 
22   
23 -    def load_xsd(self, xsd_path): 
24          """ 
25          Load the XSD schema at `xsd_path`. 
26          """ 
27          with open(xsd_path) as schema_file: 
28              xml_schema_doc = etree.parse(schema_file) 
29              self.xml_schema = etree.XMLSchema(xml_schema_doc) 
30              return self.xml_schema 
31   
32 -    def validate_path(self, path): 
33          """ 
34          Determine whether the file at `path` is valid using the configured xml schema. 
35          """ 
36          with open(path) as xml_file: 
37              return self.validate_file(xml_file) 
38   
39 -    def validate_file(self, f): 
40          """ 
41          Determine whether a file is valid using the configured xml schema. 
42          """ 
43          return self.xml_schema.validate(etree.parse(f)) 
44   
45 -    def check_path(self, path): 
46          """ 
47          This method will throw exceptions when trying to validate a path. 
48          """ 
49          with open(path) as xml_file: 
50              return self.check_file(xml_file) 
51   
52 -    def check_file(self, xml_file): 
53          """ 
54          This method will throw exceptions when trying to validate a file. 
55          """ 
56          return self.xml_schema.assertValid(etree.parse(xml_file)) 
57