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.\" ========================================================================
.\"
.IX Title "SNMP::Info::MRO 3pm"
.TH SNMP::Info::MRO 3pm "2019-02-25" "perl v5.28.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
SNMP::Info::MRO \- Method resolution introspection for SNMP::Info
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 2
\& use SNMP::Info::MRO;
\& use Data::Printer;
\&
\& p SNMP::Info::MRO::all_methods(\*(AqSNMP::Info::Layer3::Juniper\*(Aq);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This is a set of helpers to show where a given method in SNMP::Info has been
implemented, and which implementation is being used at runtime.
.PP
The following distributions are \fIrequired\fR to run this code:
.IP "\(bu" 4
\&\s-1PPI\s0
.IP "\(bu" 4
Class::ISA
.IP "\(bu" 4
Module::Info
.IP "\(bu" 4
Module::Load
.SH "FUNCTIONS"
.IX Header "FUNCTIONS"
None of the functions are exported. For all helper functions, you can pass
either the name of a Perl module, or an object instance of SNMP::Info.
.ie n .IP "all_methods( $module )" 4
.el .IP "all_methods( \f(CW$module\fR )" 4
.IX Item "all_methods( $module )"
Returns the location of methods defined in \f(CW$module\fR and all its ancestor
classes (superclasses), either as Perl subroutines or via \f(CW%GLOBALS\fR
or \f(CW%FUNCS\fR configuration. The data structure looks like:
.Sp
.Vb 10
\& {
\&   method_name => {
\&     globals => [
\&       [ Package::Name        => \*(Aqmib_leaf.0\*(Aq ],
\&       [ Other::Package::Name => \*(Aq1.3.6.1.4.1.9.2.1.58.0\*(Aq ],
\&     ],
\&   },
\&   other_method_name => [
\&     subs => [
\&       \*(AqPackage::Name\*(Aq,
\&     ],
\&     funcs => [
\&       [ Package::Name => \*(Aqmib_leaf_name\*(Aq ],
\&     ],
\&   ],
\& }
.Ve
.Sp
It should be noted that the order of method resolution in SNMP::Info is to
first look for a defined subroutine (this is done by Perl), then the
\&\s-1AUTOLOAD\s0 sequence will search for a definition in \f(CW%GLOBALS\fR followed by
\&\f(CW%FUNCS\fR.
.Sp
The defining class or module at runtime is always the first entry in the
list, if it exists:
.Sp
.Vb 2
\& $data\->{method_name}\->{subs}\->[0]
\&   if exists $data\->{method_name}\->{subs};
.Ve
.ie n .IP "subroutines( $module )" 4
.el .IP "subroutines( \f(CW$module\fR )" 4
.IX Item "subroutines( $module )"
Returns the set of subroutines defined in \f(CW$module\fR and all its ancestor
classes (superclasses). The data structure looks like:
.Sp
.Vb 9
\& {
\&   method_name => [
\&     \*(AqPackage::Name\*(Aq,
\&     \*(AqOther::Package::Name\*(Aq,
\&   ],
\&   other_method_name => [
\&     \*(AqPackage::Name\*(Aq,
\&   ],
\& }
.Ve
.Sp
Should a subroutine have been defined more than once,
the defining classes are listed in reverse order, such that the definition
used at runtime is always:
.Sp
.Vb 1
\& $data\->{method_name}\->[0];
.Ve
.ie n .IP "globals( $module || $object )" 4
.el .IP "globals( \f(CW$module\fR || \f(CW$object\fR )" 4
.IX Item "globals( $module || $object )"
Returns a data structure showing how SNMP::Info will resolve \s-1MIB\s0 Leaf
Nodes configured through the \f(CW%GLOBALS\fR hashes in \f(CW$module\fR.
.Sp
The data structure looks like:
.Sp
.Vb 9
\& {
\&   method_name => [
\&     [ Package::Name        => \*(Aqmib_leaf_name\*(Aq ],
\&     [ Other::Package::Name => \*(Aq1.3.6.1.4.1.9.2.1.58.0\*(Aq ],
\&   ],
\&   other_method_name => [
\&     [ Package::Name => \*(Aqmib_leaf.0\*(Aq ],
\&   ],
\& }
.Ve
.Sp
Where a method has been defined in different packages, then they are listed in
reverse order, such that the mapping used by SNMP::Info is always:
.Sp
.Vb 1
\& $data\->{method_name}\->[0];
.Ve
.ie n .IP "funcs( $module || $object )" 4
.el .IP "funcs( \f(CW$module\fR || \f(CW$object\fR )" 4
.IX Item "funcs( $module || $object )"
Returns a data structure showing how SNMP::Info will resolve \s-1MIB\s0 Tables
configured through the \f(CW%FUNCS\fR hashes in \f(CW$module\fR.
.Sp
See \*(L"\s-1GLOBALS\*(R"\s0 in SNMP::Info::Layer3 for further detail.
.ie n .IP "munge( $module || $object )" 4
.el .IP "munge( \f(CW$module\fR || \f(CW$object\fR )" 4
.IX Item "munge( $module || $object )"
Returns a data structure showing the subroutines used for munging returned
values for any method defined in \f(CW%FUNCS\fR or \f(CW%GLOBALS\fR.
.Sp
The data structure looks like:
.Sp
.Vb 9
\& {
\&   method_name => [
\&     [ Package::Name        => \*(Aq&subroutine\*(Aq ],
\&     [ Other::Package::Name => \*(Aq&Other::Package::subroutine\*(Aq ],
\&   ],
\&   other_method_name => [
\&     [ Package::Name => \*(Aq&subroutine\*(Aq ],
\&   ],
\& }
.Ve
.Sp
Where a mapping has been defined in different packages, then they are listed
in reverse order, such that the munge subroutine used by SNMP::Info is always:
.Sp
.Vb 1
\& $data\->{method_name}\->[0];
.Ve
.ie n .IP "file( $module )" 4
.el .IP "file( \f(CW$module\fR )" 4
.IX Item "file( $module )"
Returns the filename from which Perl will load the given module.
.ie n .IP "superclasses( $class || $object )" 4
.el .IP "superclasses( \f(CW$class\fR || \f(CW$object\fR )" 4
.IX Item "superclasses( $class || $object )"
Returns the list (in order) of the names of classes Perl will search to find
methods for this SNMP::Info class or object instance.
.Sp
Note this \fBrequires\fR the <Class:ISA> distribution to be installed.
.ie n .IP "print_globals( $module || $object )" 4
.el .IP "print_globals( \f(CW$module\fR || \f(CW$object\fR )" 4
.IX Item "print_globals( $module || $object )"
Pretty print the output of \f(CW\*(C`globals()\*(C'\fR.
.ie n .IP "print_funcs( $module || $object )" 4
.el .IP "print_funcs( \f(CW$module\fR || \f(CW$object\fR )" 4
.IX Item "print_funcs( $module || $object )"
Pretty print the output of \f(CW\*(C`funcs()\*(C'\fR.
.ie n .IP "print_munge( $module || $object )" 4
.el .IP "print_munge( \f(CW$module\fR || \f(CW$object\fR )" 4
.IX Item "print_munge( $module || $object )"
Pretty print the output of \f(CW\*(C`munge()\*(C'\fR.
.ie n .IP "print_superclasses( $class || $object )" 4
.el .IP "print_superclasses( \f(CW$class\fR || \f(CW$object\fR )" 4
.IX Item "print_superclasses( $class || $object )"
Pretty print the output of \f(CW\*(C`superclasses()\*(C'\fR.
.SH "AUTHOR"
.IX Header "AUTHOR"
Oliver Gorwits <oliver@cpan.org>
.SH "COPYRIGHT AND LICENSE"
.IX Header "COPYRIGHT AND LICENSE"
This software is copyright (c) 2014 by The SNMP::Info Project.
.PP
.Vb 10
\& # Redistribution and use in source and binary forms, with or without
\& # modification, are permitted provided that the following conditions are met:
\& #
\& #    * Redistributions of source code must retain the above copyright notice,
\& #      this list of conditions and the following disclaimer.
\& #    * 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.
\& #    * Neither the name of the University of California, Santa Cruz nor the
\& #      names of its contributors may be used to endorse or promote products
\& #      derived from this software without specific prior written permission.
\& #
\& # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
\& # AND ANY EXPRESS 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 THE COPYRIGHT OWNER OR 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.
.Ve