How to access hash of arrays values using perl

[veerubiji]

Hi monks, This is very simple for experts but not for beginners like me.I have one xml file and I processed using XML::Simple like this

my $file="service.xml";
 my $xml = new XML::Simple;
  my $data = $xml->XMLin("$file", ForceArray =>['Service','SystemReact
+ion','Customers','Suppliers','SW','HW'],);
print Dupmer ($data);

it printing hash of data like this

$var1={

  'Service' => [
                      
                {
                  'Suppliers' => [
                                  {
                                     'SW' => [
                                              {
                                       'Path' => '/work/service.xml',
                                        'Service' => 'b7a'
                                              },
                                            {
                                       'Path' => '/work/service1.xml',
                                       'Service' => 'b7b'
                                                },
                                              {
                                       'Path' => '/work/service2.xml',
                                        'Service' => 'b5'
                                                 }
                                                ]
                                               }
                                             ],
                     'Id' => 'SKRM',
                    'Customers' => [
                                    {
                                   'SW' => [
                                           {
                                     'Path' => '/work/service.xml',
                                      'Service' => 'ASOC'
                                            }
                                             ]
                                               }
                                             ],
                   'Des' => 'Control the current through the pipe',
                  'Name' => ' Control unit'
                   },
                  {
                    'Suppliers' => [
                                    {
                                    'HW' => [
                                            {
                                             'Type' => 'W',
                                     'Path' => '/work/hardware.xml',
                                             'Nr' => '18',
                                             'Service' => '1'
                                              },
                                             {
                                             'Type' => 'B',
                                    'Path' => '/work/hardware.xml',
                                             'Nr' => '7',
                                             'Service' => '1'
                                               },
                                              {
                                              'Type' => 'k',
                                    'Path' => '/work/hardware.xml',
                                              'Nr' => '1',
                                              'Service' => '1'
                                                }
                                               ]
                                               }
                                             ],
                   'Id' => 'ADTM',
                   'Customers' => [
                                   {
                                   'SW' => [
                                           {
                                      'Path' => '/work/service.xml',
                                          'Service' => 'SDCR'
                                            }
                                           ]
                                          }
                                        ],
                  'Des' => 'It delivers actual motor speed',
                  'Name' => ' Motor Drivers and Diognostics'
                       },
                       
                ]

 'Systemreaction'=>[
                     {
                      -------
                      -------
                      -------
                      }
                      {
                      -------
                      -------
                      -------
                      },
                ]
        };

How to access each elements in the service and systemReaction(not provided). because I am using "$data" in further processing. So I need to access each Id,customers, suppliers values in each service. How to get particular value from service to do some process with that value.for example I need to get all Id values form service and create nodes for each id values.

Thanks in advance

[Corion]

See References Quick Reference.

[TJPride]

Not sure what you mean by "access each element", since the elements seem to be a variety of different structures, but here's how to get into the structure a couple levels. For everyone else's benefit, I added something into that hole at the bottom and then ran this through Data::Dumper first and eliminated a bunch of the whitespace at the left side to clean it up.

use strict;
use warnings;

my $nested = {

'Systemreaction' => [
                      {
                        'Data' => 'x'
                      },
                      {
                        'Data' => 'x'
                      }
                    ],
'Service' => [
               {
                 'Customers' => [
                                  {
                                    'SW' => [
                                              {
                                                'Path' => '/work/servi
+ce.xml',
                                                'Service' => 'ASOC'
                                              }
                                            ]
                                  }
                                ],
                 'Id' => 'SKRM',
                 'Name' => ' Control unit',
                 'Suppliers' => [
                                  {
                                    'SW' => [
                                              {
                                                'Path' => '/work/servi
+ce.xml',
                                                'Service' => 'b7a'
                                              },
                                              {
                                                'Path' => '/work/servi
+ce1.xml',
                                                'Service' => 'b7b'
                                              },
                                              {
                                                'Path' => '/work/servi
+ce2.xml',
                                                'Service' => 'b5'
                                              }
                                            ]
                                  }
                                ],
                 'Des' => 'Control the current through the pipe'
               },
               {
                 'Customers' => [
                                  {
                                    'SW' => [
                                              {
                                                'Path' => '/work/servi
+ce.xml',
                                                'Service' => 'SDCR'
                                              }
                                            ]
                                  }
                                ],
                 'Id' => 'ADTM',
                 'Name' => ' Motor Drivers and Diognostics',
                 'Suppliers' => [
                                  {
                                    'HW' => [
                                              {
                                                'Type' => 'W',
                                                'Path' => '/work/hardw
+are.xml',
                                                'Nr' => '18',
                                                'Service' => '1'
                                              },
                                              {
                                                'Type' => 'B',
                                                'Path' => '/work/hardw
+are.xml',
                                                'Nr' => '7',
                                                'Service' => '1'
                                              },
                                              {
                                                'Type' => 'k',
                                                'Path' => '/work/hardw
+are.xml',
                                                'Nr' => '1',
                                                'Service' => '1'
                                              }
                                            ]
                                  }
                                ],
                 'Des' => 'It delivers actual motor speed'
               }
             ]
};

for my $service (@{$nested->{'Service'}}) {
    print "$service->{'Name'}\n";
}
for my $system (@{$nested->{'Systemreaction'}}) {
    print "$system->{'Data'}\n";
}

[veerubiji]

Sorry for not clearance post, I mean how to get nested elements, but I am facing difficult in getting "Type" and "Nr" values. can you help me with that, or give me some example.

Thanks for your reply

[TJPride]

Using my previous definition for $nested:

for my $service (@{$nested->{'Service'}}) {
    for my $suppliers (@{$service->{'Suppliers'}}) {
        for my $hw (@{$suppliers->{'HW'}}) {
            print "Type: $hw->{'Type'}\n";
            print "Nr: $hw->{'Nr'}\n";
        }
    }
}