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############################################################################## #
# Copyright (C) 2019 by 52 North #
# Initiative for Geospatial Open Source Software GmbH #
# #
# Contact: Andreas Wytzisk #
# 52 North Initiative for Geospatial Open Source Software GmbH #
# Martin-Luther-King-Weg 24 #
# 48155 Muenster, Germany #
# info@52north.org #
# #
# This program is free software; you can redistribute and/or modify it under #
# the terms of the GNU General Public License version 2 as published by the #
# Free Software Foundation. #
# #
# This program is distributed WITHOUT ANY WARRANTY; even without 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 #
# this program (see gpl-2.0.txt). If not, write to the Free Software #
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA or #
# visit the Free Software Foundation web page, http://www.fsf.org #
# #
# Author: Eike Hinderk Jürrens (e.h.juerrens@52north.org) #
# Created: 2018-11-23 #
# Project: sos4R - https://github.com/52North/sos4R #
# #
############################################################################## #
#
# Helper function to check if the given list field is available.
#
# Returns TRUE in the case of not NULL and a list with min 1 element
#
sosIsListFieldAvailable <- function(listField) {
is(listField, "list") &&
length(listField) > 0 &&
!any(sapply(listField, is.na)) &&
all(sapply(listField, is, "character")) &&
all(sapply(listField, nchar) > 0)
}
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