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File:C4/Output/JSONStream.pm
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1package C4::Output::JSONStream;
2#
3# Copyright 2008 LibLime
4#
5# This file is part of Koha.
6#
7# Koha is free software; you can redistribute it and/or modify it under the
8# terms of the GNU General Public License as published by the Free Software
9# Foundation; either version 2 of the License, or (at your option) any later
10# version.
11#
12# Koha is distributed in the hope that it will be useful, but WITHOUT ANY
13# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
14# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
15#
16# You should have received a copy of the GNU General Public License along
17# with Koha; if not, write to the Free Software Foundation, Inc.,
18# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19
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=head1 NAME

C4::Output::JSONStream - progressively build JSON data

=head1 SYNOPSIS

my $json = new C4::Output::JSONStream;

$json->param( issues => [ 'yes!', 'please', 'no', { emphasis = 'NO' } ] );
$json->param( stuff => 'realia' );

print $json->output;

=head1 DESCRIPTION

This module allows you to build JSON incrementally.

=cut
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use strict;
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use warnings;
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use JSON;
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44sub new {
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    my $class = shift;
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    my $self = {
47        data => {},
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    bless $self, $class;
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    return $self;
54}
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56sub param {
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    my $self = shift;
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    if ( @_ % 2 != 0 ) {
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        die 'param() received odd number of arguments (should be called with param => "value" pairs)';
61    }
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63    for ( my $i = 0; $i < $#_; $i += 2 ) {
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        $self->{data}->{$_[$i]} = $_[$i + 1];
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    }
66}
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68sub output {
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    my $self = shift;
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    return to_json( $self->{data} );
72}
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741;