1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
|
#!/usr/local/bin/perl -w
# POD docs at end
use strict;
use Data::Stag qw(:all);
use Getopt::Long;
use FileHandle;
my $exec;
my $codefile;
my $parser = '';
my $errhandler = "";
my $errf;
my $writer = '';
my %trap = ();
my $datafmt;
my $module;
my @units;
GetOptions("codefile|c=s"=>\$codefile,
"sub|s=s"=>\$exec,
"trap|t=s%"=>\%trap,
"parser|format|p=s" => \$parser,
"errhandler=s" => \$errhandler,
"errf|e=s" => \$errf,
"writer|w=s"=>\$writer,
"data|d=s"=>\$datafmt,
"module|m=s"=>\$module,
"units|u=s@"=>\@units,
"help|h"=>sub {system("perldoc $0");exit 0},
);
if (!$codefile && !$exec && !$module) {
$codefile = shift @ARGV if (@ARGV > 1);
die "you must supply -c or -m or -s, or provide codefile"
unless $codefile;
}
my @files = @ARGV;
$errhandler = Data::Stag->getformathandler($errhandler || 'xml');
if ($errf) {
$errhandler->file($errf);
}
else {
$errhandler->fh(\*STDERR);
}
my $catch = {};
no strict;
if ($exec) {
$catch = eval $exec;
if ($@) {
die $@;
}
if (ref($catch) ne 'HASH') {
print STDERR "exec \"$exec\" is not a hash";
exit 1;
}
}
if ($codefile) {
$catch = do "$codefile";
if ($@) {
print STDERR "\n\nstag-handle error:\n";
print STDERR "There was an error with the codefile \"$codefile\":\n\n";
die $@;
}
if (ref($catch) ne 'HASH') {
print STDERR "codefile \"$codefile\" does not return a hash";
exit 1;
}
}
if (%trap) {
#
# die Dumper \%trap;
%$catch = (%$catch, %trap);
}
use strict;
my @events;
my $inner_handler;
if ($module) {
$inner_handler = Data::Stag->makehandler($module);
} else {
my $meth = $exec ? $exec : $codefile;
if (!%$catch) {
die "method \"$meth\" did not return handler";
}
if (!ref($catch) || ref($catch) ne "HASH") {
die("$meth must return hashref");
}
$inner_handler = Data::Stag->makehandler(%$catch);
@events = keys %$catch;
}
if (@units) {
@events = @units;
}
$inner_handler->errhandler($errhandler);
my $h = Data::Stag->chainhandlers([@events],
$inner_handler,
$writer);
while (my $fn = shift @files) {
my $fh;
if (!$fn || $fn eq '-') {
$fh = \*STDIN;
$fn = '';
}
else {
$fh = FileHandle->new($fn) || die "Cannot open file: $fn";
}
my $p = Data::Stag->parser(-file=>$fn, -format=>$parser,
-errhandler=>$errhandler);
$p->handler($h);
$p->parse_fh($fh);
if ($datafmt) {
print $inner_handler->stag->$datafmt();
}
}
__END__
=head1 NAME
stag-handle - streams a stag file through a handler into a writer
=head1 SYNOPSIS
stag-handle -w itext -c my-handler.pl myfile.xml > processed.itext
stag-handle -w itext -p My::Parser -m My::Handler myfile.xml > processed.itext
=head1 DESCRIPTION
will take a Stag compatible format (xml, sxpr or itext), turn the data
into an event stream passing it through my-handler.pl
=head1 ARGUMENTS
=over
=item -help|h
shows this document
=item -module|m PERLMODULE
A module that is used to transform the input events
the module should inherit from L<Data::Stag::BaseHandler>
=item -unit|u NODE_NAME
(you should always use this option if you specify -m)
this is the unit that gets passed to the handler/transformer. this
will get set automatically if you use the the -c, -s or -t options
multiple units can be set
-u foo -u bar -u boz
=item -writer|w WRITER
writer for final transformed tree; can be xml, sxpr or itext
=item -module|m MODULE
perl modules for handling events
=item -codefile|c FILE
a file containing a perlhashref containing event handlers - see below
=item -sub|s PERL
a perl hashref containing handlers
=item -trap|t ELEMENT=SUB
=back
=head1 EXAMPLES
unix> cat my-handler.pl
{
person => sub {
my ($self, $person) = @_;
$person->set_fullname($person->get_firstname . ' ' .
$person->get_lastname);
$person;
},
address => sub {
my ($self, $address) = @_;
# remove addresses altogether from processed file
return;
},
}
=cut
|
