1 | #!/usr/bin/env perl
|
---|
2 |
|
---|
3 | use strict;
|
---|
4 | use warnings;
|
---|
5 | use utf8;
|
---|
6 |
|
---|
7 | use XML::Parser;
|
---|
8 | use Data::Dumper;
|
---|
9 |
|
---|
10 | # Reads the servlets partial XML file using XML::Parser,
|
---|
11 | # Then converts the obtained data structure to a more readable one
|
---|
12 | # Example conversion:
|
---|
13 | =xml
|
---|
14 | <servlet>
|
---|
15 | <servlet-name>library</servlet-name>
|
---|
16 | <description attribute="example">The standard gsdl3 library program</description>
|
---|
17 | <servlet-class>org.greenstone.gsdl3.LibraryServlet</servlet-class>
|
---|
18 | <init-param>
|
---|
19 | <param-name>library_name</param-name>
|
---|
20 | <param-value>library</param-value>
|
---|
21 | </init-param>
|
---|
22 | <init-param>
|
---|
23 | <param-name>site_name</param-name>
|
---|
24 | <param-value>localsite</param-value>
|
---|
25 | </init-param>
|
---|
26 | </servlet>
|
---|
27 | =cut
|
---|
28 | =data_structure
|
---|
29 | {
|
---|
30 | 'servlet' => {
|
---|
31 | 'servlet-class' => 'org.greenstone.gsdl3.LibraryServlet',
|
---|
32 | 'servlet-name' => 'library',
|
---|
33 | 'description' => {
|
---|
34 | '.value' => 'The standard gsdl3 library program',
|
---|
35 | '.attr' => {
|
---|
36 | 'attribute' => 'example'
|
---|
37 | }
|
---|
38 | },
|
---|
39 | 'init-param' => [
|
---|
40 | {
|
---|
41 | 'param-value' => 'library',
|
---|
42 | 'param-name' => 'library_name'
|
---|
43 | },
|
---|
44 | {
|
---|
45 | 'param-name' => 'site_name',
|
---|
46 | 'param-value' => 'localsite'
|
---|
47 | }
|
---|
48 | ]
|
---|
49 | }
|
---|
50 | }
|
---|
51 | =cut
|
---|
52 | sub read_servlets {
|
---|
53 | my $file = shift;
|
---|
54 | # The xml needs a root element, so we wrap it in one
|
---|
55 | my $xml='
|
---|
56 | <!DOCTYPE doc [<!ENTITY real_doc SYSTEM "' . $file . '">] >
|
---|
57 | <__root__>
|
---|
58 | &real_doc;
|
---|
59 | </__root__>
|
---|
60 | ';
|
---|
61 | # Parse the data using XML::Parser
|
---|
62 | my $data = new XML::Parser (Style => 'Tree')->parse ($xml);
|
---|
63 |
|
---|
64 | sub tidy {
|
---|
65 | my %hash;
|
---|
66 | # If the element has attributes, add them to the hash
|
---|
67 | my $attr = shift;
|
---|
68 | if (scalar keys %$attr > 0) {
|
---|
69 | $hash{'.attr'} = $attr;
|
---|
70 | }
|
---|
71 | # Read any child elements or text value
|
---|
72 | while (@_) {
|
---|
73 | my $element = shift;
|
---|
74 | my $value = shift;
|
---|
75 | if ($element eq 0) {
|
---|
76 | $value =~ /^\s*$/ || ($hash{'.value'} .= $value);
|
---|
77 | } else {
|
---|
78 | # If there is more than one of a single tupe of child element,
|
---|
79 | # That child element must become an array
|
---|
80 | if (defined $hash{$element}) {
|
---|
81 | unless (ref $hash{$element} eq 'ARRAY') {
|
---|
82 | $hash{$element} = [ $hash{$element} ];
|
---|
83 | }
|
---|
84 | push @{$hash{$element}}, tidy (@{$value});
|
---|
85 | } else {
|
---|
86 | $hash{$element} = tidy (@{$value});
|
---|
87 | }
|
---|
88 | }
|
---|
89 | }
|
---|
90 | # If the element only has a value, it can become a scalar
|
---|
91 | if (scalar keys %hash == 1 and defined $hash{'.value'}) {
|
---|
92 | return $hash{'.value'};
|
---|
93 | }
|
---|
94 | return \%hash;
|
---|
95 | }
|
---|
96 | return tidy (@{@$data[1]});
|
---|
97 | }
|
---|
98 |
|
---|
99 | # Writes a data structure to an XML file
|
---|
100 | sub write_servlets {
|
---|
101 | my ($hash, $file) = @_;
|
---|
102 | open OUT, '>', $file;
|
---|
103 | sub open_tag {
|
---|
104 | my ($indent, $tag, $attr) = @_;
|
---|
105 | print OUT $indent, "<", $tag;
|
---|
106 | if (defined $attr) {
|
---|
107 | for my $key (sort keys %$attr) {
|
---|
108 | print OUT " ", $key, '="', $attr->{$key}, '"';
|
---|
109 | }
|
---|
110 | }
|
---|
111 | print OUT ">";
|
---|
112 | }
|
---|
113 | sub write_xml {
|
---|
114 | my ($indent, $hash) = @_;
|
---|
115 | for my $key (sort keys %$hash) {
|
---|
116 | $key eq '.attr' && next;
|
---|
117 | my $val = $hash->{$key};
|
---|
118 | $key eq '.value' && do {
|
---|
119 | print OUT $val, "\n";
|
---|
120 | next;
|
---|
121 | };
|
---|
122 | for (ref $val) {
|
---|
123 | /^ARRAY$/ && do {
|
---|
124 | for my $element (@$val) {
|
---|
125 | open_tag ($indent, $key, $element->{'.attr'});
|
---|
126 | for (ref $element) {
|
---|
127 | /^HASH$/ && do {
|
---|
128 | print OUT "\n";
|
---|
129 | write_xml (" $indent", $element);
|
---|
130 | print OUT $indent, "</", $key, ">\n";
|
---|
131 | last;
|
---|
132 | };
|
---|
133 | print OUT $element, "</", $key, ">\n";
|
---|
134 | }
|
---|
135 | }
|
---|
136 | last;
|
---|
137 | };
|
---|
138 | /^HASH$/ && do {
|
---|
139 | open_tag ($indent, $key, $val->{'.attr'});
|
---|
140 | # If the element only has a value with attributes,
|
---|
141 | # it can be formatted on one line
|
---|
142 | if (scalar keys %$val == 2 and defined $val->{'.value'}) {
|
---|
143 | print OUT $val->{'.value'}, "</", $key, ">\n";
|
---|
144 | } else {
|
---|
145 | print OUT "\n";
|
---|
146 | write_xml (" $indent", $val);
|
---|
147 | print OUT $indent, "</", $key, ">\n";
|
---|
148 | }
|
---|
149 | last;
|
---|
150 | };
|
---|
151 | open_tag ($indent, $key);
|
---|
152 | print OUT $val;
|
---|
153 | print OUT "</", $key, ">\n";
|
---|
154 | }
|
---|
155 | }
|
---|
156 | }
|
---|
157 | write_xml ("", $hash);
|
---|
158 | close OUT;
|
---|
159 | }
|
---|
160 |
|
---|
161 | my $hash;
|
---|
162 | # Hackish non-interactive CLI parser
|
---|
163 | while (@ARGV) {
|
---|
164 | for (shift) {
|
---|
165 | /^read$/i && do {
|
---|
166 | $hash = read_servlets (shift);
|
---|
167 | last;
|
---|
168 | };
|
---|
169 | /^write$/i && do {
|
---|
170 | write_servlets ($hash, shift);
|
---|
171 | last;
|
---|
172 | };
|
---|
173 | /^debug$/i && do {
|
---|
174 | print Dumper $hash;
|
---|
175 | last;
|
---|
176 | };
|
---|
177 | /^count$/i && do {
|
---|
178 | print "Found ", scalar @{$hash->{servlet}}, " servlets\n";
|
---|
179 | last;
|
---|
180 | };
|
---|
181 | /^list$/i && do {
|
---|
182 | print "Servlets:\n";
|
---|
183 | for my $servlet (@{$hash->{servlet}}) {
|
---|
184 | print " ", $servlet->{'servlet-name'}, "\n";
|
---|
185 | }
|
---|
186 | last;
|
---|
187 | };
|
---|
188 | }
|
---|
189 | }
|
---|