oops - I sent that before I had my coffee. I should have attached the checkin version, not the broken one :) Brian Lloyd [EMAIL PROTECTED] Software Engineer 540.371.6909 Digital Creations http://www.digicool.com
############################################################################## # # Zope Public License (ZPL) Version 1.0 # ------------------------------------- # # Copyright (c) Digital Creations. All rights reserved. # # This license has been certified as Open Source(tm). # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions are # met: # # 1. Redistributions in source code must retain the above copyright # notice, this list of conditions, and the following disclaimer. # # 2. Redistributions in binary form must reproduce the above copyright # notice, this list of conditions, and the following disclaimer in # the documentation and/or other materials provided with the # distribution. # # 3. Digital Creations requests that attribution be given to Zope # in any manner possible. Zope includes a "Powered by Zope" # button that is installed by default. 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Modified redistributions of any form whatsoever must retain # the following acknowledgment: # # "This product includes software developed by Digital Creations # for use in the Z Object Publishing Environment # (http://www.zope.org/)." # # Intact (re-)distributions of any official Zope release do not # require an external acknowledgement. # # 7. Modifications are encouraged but must be packaged separately as # patches to official Zope releases. Distributions that do not # clearly separate the patches from the original work must be clearly # labeled as unofficial distributions. Modifications which do not # carry the name Zope may be packaged in any form, as long as they # conform to all of the clauses above. # # # Disclaimer # # THIS SOFTWARE IS PROVIDED BY DIGITAL CREATIONS ``AS IS'' AND ANY # EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DIGITAL CREATIONS OR ITS # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND # ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF # SUCH DAMAGE. # # # This software consists of contributions made by Digital Creations and # many individuals on behalf of Digital Creations. Specific # attributions are listed in the accompanying credits file. # ############################################################################## __doc__='''Class for reading RDB files $Id: RDB.py,v 1.24.32.4 2000/12/19 15:31:53 brian Exp $''' __version__='$Revision: 1.24.32.4 $'[11:-2] import regex, regsub from string import split, strip, lower, upper, atof, atoi, atol, find, join import DateTime from Missing import MV from array import array from Record import Record from Acquisition import Implicit import ExtensionClass def parse_text(s): if find(s,'\\') < 0 and (find(s,'\\t') < 0 and find(s,'\\n') < 0): return s r=[] for x in split(s,'\\\\'): x=join(split(x,'\\n'),'\n') r.append(join(split(x,'\\t'),'\t')) return join(r,'\\') Parsers={'n': atof, 'i': atoi, 'l': atol, 'd': DateTime.DateTime, 't': parse_text, } class SQLAlias(ExtensionClass.Base): def __init__(self, name): self._n=name def __of__(self, parent): return getattr(parent, self._n) class NoBrains: pass class DatabaseResults: """Class for reading RDB files """ _index=None # We need to allow access to not-explicitly-protected # individual record objects contained in the result. __allow_access_to_unprotected_subobjects__=1 def __init__(self,file,brains=NoBrains, parent=None, zbrains=None): self._file=file readline=file.readline line=readline() self._parent=parent if zbrains is None: zbrains=NoBrains comment_pattern=regex.compile('#') while line and comment_pattern.match(line) >= 0: line=readline() line=line[:-1] if line and line[-1:] in '\r\n': line=line[:-1] self._names=names=split(line,'\t') if not names: raise ValueError, 'No column names' aliases=[] self._schema=schema={} i=0 for name in names: name=strip(name) if not name: raise ValueError, 'Empty column name, %s' % name if schema.has_key(name): raise ValueError, 'Duplicate column name, %s' % name schema[name]=i # XXX temporary fix: SQLAliases have a leak that needs to # be addressed, then we can take this out. # # n=lower(name) # if n != name: aliases.append((n, SQLAlias(name))) # n=upper(name) # if n != name: aliases.append((n, SQLAlias(name))) schema[lower(name)]=i schema[upper(name)]=i # / temporary fix i=i+1 self._nv=nv=len(names) line=readline() line=line[:-1] if line[-1:] in '\r\n': line=line[:-1] self._defs=defs=split(line,'\t') if not defs: raise ValueError, 'No column definitions' if len(defs) != nv: raise ValueError, ( """The number of column names and the number of column definitions are different.""") i=0 self._parsers=parsers=[] defre=regex.compile('\([0-9]*\)\([a-zA-Z]\)?') self._data_dictionary=dd={} self.__items__=items=[] for _def in defs: _def=strip(_def) if not _def: raise ValueError, ('Empty column definition for %s' % names[i]) if defre.match(_def) < 0: raise ValueError, ( 'Invalid column definition for, %s, for %s' % _def, names[i]) type=lower(defre.group(2)) width=defre.group(1) if width: width=atoi(width) else: width=8 try: parser=Parsers[type] except: parser=str name=names[i] d={'name': name, 'type': type, 'width': width, 'parser': parser} items.append(d) dd[name]=d parsers.append((i,parser)) i=i+1 # Create a record class to hold the records. names=tuple(names) class r(Record, Implicit, brains, zbrains): 'Result record class' r.__record_schema__=schema for k in filter(lambda k: k[:2]=='__', Record.__dict__.keys()): setattr(r,k,getattr(Record,k)) # XXX temporary fix: SQLAliases have a leak that needs to # be addressed, then we can add this back. # # Add SQL Aliases # d=r.__dict__ # for k, v in aliases: # if not hasattr(r,k): d[k]=v if hasattr(brains, '__init__'): binit=brains.__init__ if hasattr(binit,'im_func'): binit=binit.im_func def __init__(self, data, parent, binit=binit): Record.__init__(self,data) binit(self.__of__(parent)) r.__dict__['__init__']=__init__ self._class=r # OK, we've read meta data, now get line indexes p=file.tell() save=self._lines=array('i') save=save.append l=readline() while l: save(p) p=p+len(l) l=readline() def _searchable_result_columns(self): return self.__items__ def names(self): return self._names def data_dictionary(self): return self._data_dictionary def __len__(self): return len(self._lines) def __getitem__(self,index): if index==self._index: return self._row file=self._file file.seek(self._lines[index]) line=file.readline() line=line[:-1] if line and line[-1:] in '\r\n': line=line[:-1] fields=split(line,'\t') l=len(fields) nv=self._nv if l != nv: if l < nv: fields=fields+['']*(nv-l) else: raise ValueError, ( """The number of items in record %s is invalid <pre>%s\n%s\n%s\n%s</pre> """ % (index, ('='*40), line, ('='*40), fields)) for i, parser in self._parsers: try: v=parser(fields[i]) except: if fields[i]: raise ValueError, ( """Invalid value, %s, for %s in record %s""" % (fields[i], self._names[i], index)) else: v=MV fields[i]=v parent=self._parent fields=self._class(fields, parent) self._index=index self._row=fields if parent is None: return fields return fields.__of__(parent) File=DatabaseResults
