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Added Net::LDAP::Filter.execute, which enables applications to perform

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arbitrary processing based on LDAP filters.
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blackhedd 2007-05-06 20:27:28 +00:00
parent 9840657689
commit 2769d75b01
1 changed files with 45 additions and 0 deletions
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45
lib/net/ldap/filter.rb
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@ -281,6 +281,51 @@ class Filter
end end
# Perform filter operations against a user-supplied block. This is useful when implementing
# an LDAP directory server. The caller's block will be called with two arguments: first, a
# symbol denoting the "operation" of the filter; and second, an array consisting of arguments
# to the operation. The user-supplied block (which is MANDATORY) should perform some desired
# application-defined processing, and may return a locally-meaningful object that will appear
# as a parameter in the :and, :or and :not operations detailed below.
#
# A typical object to return from the user-supplied block is an array of
# Net::LDAP::Filter objects.
#
# These are the possible values that may be passed to the user-supplied block:
# :equalityMatch (the arguments will be an attribute name and a value to be matched);
# :substrings (two arguments: an attribute name and a value containing one or more * characters);
# :present (one argument: an attribute name);
# :greaterOrEqual (two arguments: an attribute name and a value to be compared against);
# :lessOrEqual (two arguments: an attribute name and a value to be compared against);
# :and (two or more arguments, each of which is an object returned from a recursive call
# to #execute, with the same block;
# :or (two or more arguments, each of which is an object returned from a recursive call
# to #execute, with the same block;
# :not (one argument, which is an object returned from a recursive call to #execute with the
# the same block.
#
def execute &block
case @op
when :eq
if @right == "*"
yield :present, @left
elsif @right.index '*'
yield :substrings, @left, @right
else
yield :equalityMatch, @left, @right
end
when :ge
yield :greaterOrEqual, @left, @right
when :le
yield :lessOrEqual, @left, @right
when :or, :and
yield @op, (@left.execute &block), (@right.execute &block)
when :not
yield @op, (@left.execute &block)
end || []
end
#-- #--
# coalesce # coalesce
# This is a private helper method for dealing with chains of ANDs and ORs # This is a private helper method for dealing with chains of ANDs and ORs