Page MenuHomec4science
Files F63506194

bfe_field.py
No OneTemporary
Actions

File Metadata

Created
Mon, May 20, 14:53

bfe_field.py
View Options

# -*- coding: utf-8 -*-
##
## This file is part of Invenio.
## Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 CERN.
##
## Invenio is free software; you can redistribute it and/or
## modify it under the terms of the GNU General Public License as
## published by the Free Software Foundation; either version 2 of the
## License, or (at your option) any later version.
##
## Invenio is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
## General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Invenio; if not, write to the Free Software Foundation, Inc.,
## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
"""BibFormat element - Prints a custom field
"""
__revision__ = "$Id$"
from invenio.bibformat_utils import parse_tag
def format_element(bfo, tag, limit, instances_separator=" ",
subfields_separator=" ", extension=""):
"""
Prints the given field of a record.
If tag is in range [001, 010], this element assumes
that it accesses a control field. Else it considers it
accesses a data field.
@param tag: the tag code of the field that is to be printed
@param instances_separator: a separator between instances of field
@param subfields_separator: a separator between subfields of an instance
@param limit: the maximum number of values to display.
@param extension: a text printed at the end if 'limit' has been exceeded
"""
# Check if data or control field
p_tag = parse_tag(tag)
if p_tag[0].isdigit() and int(p_tag[0]) in range(0, 11):
return bfo.control_field(tag)
elif p_tag[0].isdigit():
# Get values without subcode.
# We will filter unneeded subcode later
if p_tag[1] == '':
p_tag[1] = '_'
if p_tag[2] == '':
p_tag[2] = '_'
values = bfo.fields(p_tag[0]+p_tag[1]+p_tag[2]) # Values will
# always be a
# list of
# dicts
else:
return ''
x = 0
instances_out = [] # Retain each instance output
for instance in values:
filtered_values = [value for (subcode, value) in instance.iteritems()
if p_tag[3] == '' or p_tag[3] == '%' \
or p_tag[3] == subcode]
if len(filtered_values) > 0:
# We have found some corresponding subcode(s)
if limit.isdigit() and x + len(filtered_values) >= int(limit):
# We are going to exceed the limit
filtered_values = filtered_values[:int(limit)-x] # Takes only needed one
if len(filtered_values) > 0: # do not append empty list!
instances_out.append(subfields_separator.join(filtered_values))
x += len(filtered_values) # record that so we know limit has been exceeded
break # No need to go further
else:
instances_out.append(subfields_separator.join(filtered_values))
x += len(filtered_values)
ext_out = ''
if limit.isdigit() and x > int(limit):
ext_out = extension
return instances_separator.join(instances_out) + ext_out

Event Timeline

c4science · Help