initial checkin

diff --git a/sfa/storage/record.py b/sfa/storage/record.py
new file mode 100644 (file)
index 0000000..b31ed26
--- /dev/null
+++ b/sfa/storage/record.py
@@ -0,0 +1,99 @@
+from sfa.util.sfatime import utcparse, datetime_to_string
+from types import StringTypes
+from datetime import datetime
+from sfa.util.xml import XML
+from sfa.trust.gid import GID
+
+class Record:
+
+    def __init__(self, dict=None, xml=None):
+        if dict:
+            self.load_from_dict(dict)
+        elif xml:
+            xml_record = XML(xml)
+            xml_dict = xml_record.todict()
+            self.load_from_dict(xml_dict)  
+
+    # xxx fixme
+    # turns out the date_created field is received by the client as a 'created' int
+    # (and 'last_updated' does not make it at all)
+    # let's be flexible
+    def date_repr (self,fields):
+        if not isinstance(fields,list): fields=[fields]
+        for field in fields:
+            value=getattr(self,field,None)
+            if isinstance (value,datetime):
+                return datetime_to_string (value)
+            elif isinstance (value,(int,float)):
+                return datetime_to_string(utcparse(value))
+        # fallback
+        return "** undef_datetime **"
+    
+    def todict (self):
+        d=self.__dict__
+        keys=[k for k in d.keys() if not k.startswith('_')]
+        return dict ( [ (k,d[k]) for k in keys ] )
+
+    def load_from_dict (self, d):
+        for (k,v) in d.iteritems():
+            # experimental
+            if isinstance(v, StringTypes) and v.lower() in ['true']: v=True
+            if isinstance(v, StringTypes) and v.lower() in ['false']: v=False
+            setattr(self,k,v)
+
+    # in addition we provide convenience for converting to and from xml records
+    # for this purpose only, we need the subclasses to define 'fields' as either
+    # a list or a dictionary
+    def xml_fields (self):
+        fields=self.fields
+        if isinstance(fields,dict): fields=fields.keys()
+        return fields
+
+    def save_as_xml (self):
+        # xxx not sure about the scope here
+        input_dict = dict( [ (key, getattr(self.key), ) for key in self.xml_fields() if getattr(self,key,None) ] )
+        xml_record=XML("<record />")
+        xml_record.parse_dict (input_dict)
+        return xml_record.toxml()
+
+    def dump(self, format=None, dump_parents=False):
+        if not format:
+            format = 'text'
+        else:
+            format = format.lower()
+        if format == 'text':
+            self.dump_text(dump_parents)
+        elif format == 'xml':
+            print self.save_to_string()
+        elif format == 'simple':
+            print self.dump_simple()
+        else:
+            raise Exception, "Invalid format %s" % format
+
+    def dump_text(self, dump_parents=False):
+        # print core fields in this order
+        core_fields = [ 'hrn', 'type', 'authority', 'date_created', 'created', 'last_updated', 'gid',  ]
+        print "".join(['=' for i in range(40)])
+        print "RECORD"
+        print "    hrn:", self.hrn
+        print "    type:", self.type
+        print "    authority:", self.authority
+        print "    date created:", self.date_repr( ['date_created','created'] )
+        print "    last updated:", self.date_repr('last_updated')
+        print "    gid:"
+        if self.gid:
+            print GID(self.gid).dump_string(8, dump_parents)    
+
+        # print remaining fields
+        for attrib_name in dir(self):
+            attrib = getattr(self, attrib_name)
+            # skip internals
+            if attrib_name.startswith('_'):     continue
+            # skip core fields
+            if attrib_name in core_fields:      continue
+            # skip callables
+            if callable (attrib):               continue
+            print "     %s: %s" % (attrib_name, attrib)
+
+    def dump_simple(self):
+        return "%s"%self