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# $Id: entry.rb 123 2006-05-18 03:52:38Z blackhedd $
#
# LDAP Entry (search-result) support classes
#
#
#----------------------------------------------------------------------------
#
# Copyright (C) 2006 by Francis Cianfrocca. All Rights Reserved.
#
# Gmail: garbagecat10
#
# This program 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.
#
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
#---------------------------------------------------------------------------
#
module Net
class LDAP
# Objects of this class represent individual entries in an LDAP
# directory. User code generally does not instantiate this class.
# Net::LDAP#search provides objects of this class to user code,
# either as block parameters or as return values.
#
# In LDAP-land, an "entry" is a collection of attributes that are
# uniquely and globally identified by a DN ("Distinguished Name").
# Attributes are identified by short, descriptive words or phrases.
# Although a directory is
# free to implement any attribute name, most of them follow rigorous
# standards so that the range of commonly-encountered attribute
# names is not large.
#
# An attribute name is case-insensitive. Most directories also
# restrict the range of characters allowed in attribute names.
# To simplify handling attribute names, Net::LDAP::Entry
# internally converts them to a standard format. Therefore, the
# methods which take attribute names can take Strings or Symbols,
# and work correctly regardless of case or capitalization.
#
# An attribute consists of zero or more data items called
# <i>values.</i> An entry is the combination of a unique DN, a set of attribute
# names, and a (possibly-empty) array of values for each attribute.
#
# Class Net::LDAP::Entry provides convenience methods for dealing
# with LDAP entries.
# In addition to the methods documented below, you may access individual
# attributes of an entry simply by giving the attribute name as
# the name of a method call. For example:
# ldap.search( ... ) do |entry|
# puts "Common name: #{entry.cn}"
# puts "Email addresses:"
# entry.mail.each {|ma| puts ma}
# end
# If you use this technique to access an attribute that is not present
# in a particular Entry object, a NoMethodError exception will be raised.
#
#--
# Ugly problem to fix someday: We key off the internal hash with
# a canonical form of the attribute name: convert to a string,
# downcase, then take the symbol. Unfortunately we do this in
# at least three places. Should do it in ONE place.
class Entry
# This constructor is not generally called by user code.
def initialize dn = nil # :nodoc:
@myhash = Hash.new {|k,v| k[v] = [] }
@myhash[:dn] = [dn]
end
def []= name, value # :nodoc:
sym = name.to_s.downcase.intern
@myhash[sym] = value
end
#--
# We have to deal with this one as we do with []=
# because this one and not the other one gets called
# in formulations like entry["CN"] << cn.
#
def [] name # :nodoc:
name = name.to_s.downcase.intern unless name.is_a?(Symbol)
@myhash[name]
end
# Returns the dn of the Entry as a String.
def dn
self[:dn][0]
end
# Returns an array of the attribute names present in the Entry.
def attribute_names
@myhash.keys
end
# Accesses each of the attributes present in the Entry.
# Calls a user-supplied block with each attribute in turn,
# passing two arguments to the block: a Symbol giving
# the name of the attribute, and a (possibly empty)
# Array of data values.
#
def each
if block_given?
attribute_names.each {|a|
attr_name,values = a,self[a]
yield attr_name, values
}
end
end
alias_method :each_attribute, :each
#--
# Convenience method to convert unknown method names
# to attribute references. Of course the method name
# comes to us as a symbol, so let's save a little time
# and not bother with the to_s.downcase two-step.
# Of course that means that a method name like mAIL
# won't work, but we shouldn't be encouraging that
# kind of bad behavior in the first place.
# Maybe we should thow something if the caller sends
# arguments or a block...
#
def method_missing *args, &block # :nodoc:
s = args[0].to_s.downcase.intern
if attribute_names.include?(s)
self[s]
elsif s.to_s[-1] == 61 and s.to_s.length > 1
value = args[1] or raise RuntimeError.new( "unable to set value" )
value = [value] unless value.is_a?(Array)
name = s.to_s[0..-2].intern
self[name] = value
else
raise NoMethodError.new( "undefined method '#{s}'" )
end
end
def write
end
end # class Entry
end # class LDAP
end # module Net
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