source: TI12-security/trunk/NDGSecurity/python/ndg_security_common/ndg/security/common/authz/xacml/etree/targetreader.py @ 6731

'''
Created on 16 Mar 2010

@author: pjkersha
'''
from ndg.security.common.authz.xacml import XMLParseError
from ndg.security.common.authz.xacml.action import Action
from ndg.security.common.authz.xacml.resource import Resource
from ndg.security.common.authz.xacml.subject import Subject
from ndg.security.common.authz.xacml.environment import Environment
from ndg.security.common.authz.xacml.etree.reader import AbstractReader


class TargetReader(AbstractReader):
    """ElementTree based parser for XACML Target elements"""
    
    def __call__(self, obj):
        elem = super(TargetReader, self)._parse(obj)
        
        target = Target()
        cls = Target
        
        localName = QName.getLocalPart(elem.tag)
        if localName != cls.ELEMENT_LOCAL_NAME:
            raise XMLParseError('No "%s" element found' % 
                                cls.ELEMENT_LOCAL_NAME)
                    
        # Parse sub-elements
        for childElem in elem:
            localName = QName.getLocalPart(childElem.tag)
            
            if localName == Subject.ELEMENT_LOCAL_NAME:
                target.subjects.append(SubjectReader.parse(childElem))
                                
            elif localName == Resource.ELEMENT_LOCAL_NAME:
                target.resources.append(ResourceReader.parse(childElem))
                
            elif localName == Action.ELEMENT_LOCAL_NAME:
                target.actions.append(ActionReader.parse(childElem))
                
            elif localName == Environment.ELEMENT_LOCAL_NAME:
                target.environments.append(EnvironmentReader.parse(childElem))
                
            else:
                raise XMLParseError("XACML Target child element name %r not "
                                    "recognised" % localName)