Re^4: parse xml and trigger function modules.

[balajinagaraju]

Hi, I tried to work with XML::Twig and was successful upto some extent, but still facing problems in accessing certain areas of my XML.How do i access the steps mentioned in each testcase and there corresponding attributes, the solution is quiet urgent for me, can you please suggest how i can access these elements and attributes.

use strict;
use warnings;
use 5.010;
use XML::Simple;
use XML::MyXML;
use XML::Twig;

my $twig= new XML::Twig(
twig_handlers => { testcase => \&testcase });   # create the twig

$twig->parsefile( 'D:\\ABC\\Perl Projects\\DCA.xml');
#$twig->print;

my $root= $twig->root;
#$root->set_tag( 'html'); 
 
$twig->print;
my @testcase = $root->children('testcase');
# foreach my $testcase (@testcase)
#    { $testcase->set_tag('p'); }        # turn them into p
  $twig->print;   

sub testcase{
    
     my ($twig, $testcase) = @_;
     print $testcase->field('command6');
     print $testcase->att('type');
     print "\n";
}

[GrandFather]

Something like:

use strict;
use warnings;
use XML::Twig;

my $xmlStr = <<XML;
<doc>
    <testcase1>
    <step1 command ="Launchapp " param1 = "executablepath" param2 = "d
+irpath"/>
    <step2 command = "Dothis"/>
    <step3 command = "Changemode" param1 = "100"/>
    <step4 command = "CaptureRectanlge" param1 = "3" param2 = "96" par
+am3 = "726" param4 = "580"/>
    <step5 command = "CompareImage" image1 = "D:\\img1.jpg" image2 = "
+D:\\img2.jpg "/>
    </testcase1>

    <testcase2>
    <step1 command ="Launchapp " param1 = "executablepath" param2 = "d
+irpath"/>
    <step2 command = "Dothis"/>
    <step3 command = "Changemode" param1 = "100"/>
    <step4 command = "CaptureRectanlge" param1 = "3" param2 = "96" par
+am3 = "726" param4 = "580"/>
    <step5 command = "CompareImage" image1 = "D:\\img1.jpg" image2 = "
+D:\\img2.jpg "/>
    </testcase2>
</doc>
XML


my $twig = new XML::Twig(twig_handlers => {'*' => \&testcase});

$twig->parse($xmlStr);


sub testcase {
    my ($twig, $testcase) = @_;
    my $tag = $testcase->tag();

    return 1 if $tag !~ /^testcase\d+$/;

    print "$tag\n";

    for my $step ($testcase->children()) {
        my $tag = $step->tag();
        my %attrs = %{$step->atts()};
        print "Command: $attrs{'command'}(";
        print join ', ', map {$attrs{$_}} grep {/^param/} sort keys %a
+ttrs;
        print ")\n";
    }

    print "\n";
}

Prints:

testcase1
Command: Launchapp (executablepath, dirpath)
Command: Dothis()
Command: Changemode(100)
Command: CaptureRectanlge(3, 96, 726, 580)
Command: CompareImage()

testcase2
Command: Launchapp (executablepath, dirpath)
Command: Dothis()
Command: Changemode(100)
Command: CaptureRectanlge(3, 96, 726, 580)
Command: CompareImage()

This is somewhat messier than it ought be because the test case tags are all different. If the tags were 'testcase' and the case identifier were an attribute the twig_handlers expression could be just 'testcase' and the testing in the handler sub is no longer required.

[Anonymous Monk]

Dude see Re^3: parse xml and store data in array of hashesh its much simpler than that

#!/usr/bin/perl --
#~ 2011-07-23-08:42:20+0000 by Anonymous Monk
#~ 2012-04-10-00:42:57 updated for GrandFather/balajinagaraju
#~ perltidy -csc -otr -opr -ce -nibc -i=4
use strict;
use warnings;
use autodie;    # dies if open/close... fail
use Data::Dumper;
use XML::Twig;

Main( @ARGV );
exit( 0 );

sub Main {
    Demo();
}

sub NotDemoMeaningfulName {
    my ($xml) = @_;
    my @data;
    my %testcase;
    my $t = XML::Twig->new(
        twig_handlers => {
            '/doc/*' => sub {
                warn $_->path;
                push @data, { %testcase } if %testcase;
                %testcase = ();
                $_->purge;    # free memory
            },
            '/doc/*/*' => sub {
                warn $_->path;
                $testcase{ $_->tag } = $_->atts ;
            },
        },
    );
    $t->xparse($xml);
    $t->purge;
    return \@data;
} ## end sub NotDemoMeaningfulName

sub Demo {
    my $ref = NotDemoMeaningfulName( DemoData() );
    print Dumper($ref);
}

sub DemoData {
#~ http://perlmonks.com/?abspart=1;displaytype=displaycode;node_id=964
+274;part=1
    my $xml = <<'__XML__';
<doc>
    <testcase1>
    <step1 command ="Launchapp " param1 = "executablepath" param2 = "d
+irpath"/>
    <step2 command = "Dothis"/>
    <step3 command = "Changemode" param1 = "100"/>
    <step4 command = "CaptureRectanlge" param1 = "3" param2 = "96" par
+am3 = "726" param4 = "580"/>
    <step5 command = "CompareImage" image1 = "D:\\img1.jpg" image2 = "
+D:\\img2.jpg "/>
    </testcase1>

    <testcase2>
    <step1 command ="Launchapp " param1 = "executablepath" param2 = "d
+irpath"/>
    <step2 command = "Dothis"/>
    <step3 command = "Changemode" param1 = "100"/>
    <step4 command = "CaptureRectanlge" param1 = "3" param2 = "96" par
+am3 = "726" param4 = "580"/>
    <step5 command = "CompareImage" image1 = "D:\\img1.jpg" image2 = "
+D:\\img2.jpg "/>
    </testcase2>
</doc>
__XML__
    return $xml;
} ## end sub DemoData
__END__
$ perl xml.twig.964274.pl
/doc/testcase1/step1 at xml.twig.964274.pl line 31.
/doc/testcase1/step2 at xml.twig.964274.pl line 31.
/doc/testcase1/step3 at xml.twig.964274.pl line 31.
/doc/testcase1/step4 at xml.twig.964274.pl line 31.
/doc/testcase1/step5 at xml.twig.964274.pl line 31.
/doc/testcase1 at xml.twig.964274.pl line 25.
/doc/testcase2/step1 at xml.twig.964274.pl line 31.
/doc/testcase2/step2 at xml.twig.964274.pl line 31.
/doc/testcase2/step3 at xml.twig.964274.pl line 31.
/doc/testcase2/step4 at xml.twig.964274.pl line 31.
/doc/testcase2/step5 at xml.twig.964274.pl line 31.
/doc/testcase2 at xml.twig.964274.pl line 25.
$VAR1 = [
          {
            'step2' => {
                       'command' => 'Dothis'
                     },
            'step1' => {
                       'param2' => 'dirpath',
                       'param1' => 'executablepath',
                       'command' => 'Launchapp '
                     },
            'step4' => {
                       'param4' => '580',
                       'param2' => '96',
                       'param3' => '726',
                       'param1' => '3',
                       'command' => 'CaptureRectanlge'
                     },
            'step5' => {
                       'image1' => 'D:\\\\img1.jpg',
                       'image2' => 'D:\\\\img2.jpg ',
                       'command' => 'CompareImage'
                     },
            'step3' => {
                       'param1' => '100',
                       'command' => 'Changemode'
                     }
          },
          {
            'step2' => {
                       'command' => 'Dothis'
                     },
            'step1' => {
                       'param2' => 'dirpath',
                       'param1' => 'executablepath',
                       'command' => 'Launchapp '
                     },
            'step4' => {
                       'param4' => '580',
                       'param2' => '96',
                       'param3' => '726',
                       'param1' => '3',
                       'command' => 'CaptureRectanlge'
                     },
            'step5' => {
                       'image1' => 'D:\\\\img1.jpg',
                       'image2' => 'D:\\\\img2.jpg ',
                       'command' => 'CompareImage'
                     },
            'step3' => {
                       'param1' => '100',
                       'command' => 'Changemode'
                     }
          }
        ];