Provided by: libjson-pointer-perl_0.07-2_all 
NAME
JSON::Pointer - A Perl implementation of JSON Pointer (RFC6901)
VERSION
This document describes JSON::Pointer version 0.07.
SYNOPSIS
use JSON::Pointer;
my $obj = {
foo => 1,
bar => [ { qux => "hello" }, 3 ],
baz => { boo => [ 1, 3, 5, 7 ] }
};
JSON::Pointer->get($obj, "/foo"); ### $obj->{foo}
JSON::Pointer->get($obj, "/bar/0"); ### $obj->{bar}[0]
JSON::Pointer->get($obj, "/bar/0/qux"); ### $obj->{bar}[0]{qux}
JSON::Pointer->get($obj, "/bar/1"); ### $obj->{bar}[1]
JSON::Pointer->get($obj, "/baz/boo/2"); ### $obj->{baz}{boo}[2]
DESCRIPTION
This library is implemented JSON Pointer (<http://tools.ietf.org/html/rfc6901>) and some
useful operator from JSON Patch (<http://tools.ietf.org/html/rfc6902>).
JSON Pointer is available to identify a specified value in JSON document, and it is
simillar to XPath. Please read the both of specifications for details.
METHODS
get($document :HashRef/ArrayRef/Scalar, $pointer :Str, $strict :Int) :Scalar
$document :HashRef/ArrayRef/Scalar
Target perl data structure that is able to be presented by JSON format.
$pointer :Str
JSON Pointer string to identify specified value in the document.
$strict :Int
Strict mode. When this value equals true value, this method may throw exception on
error. When this value equals false value, this method return undef value on error.
Get specified value identified by $pointer from $document. For example,
use JSON::Pointer;
print JSON::Pointer->get({ foo => 1, bar => { "qux" => "hello" } }, "/bar/qux"); ### hello
get_relative($document :HashRef/ArrayRef/Scalar, $current_pointer :Str, $relative_pointer
:Str, $strict :Int) :Scalar
This method is highly EXPERIMENTAL. Because this method depends on
<http://tools.ietf.org/html/draft-luff-relative-json-pointer-00> draft spec.
$document :HashRef/ArrayRef/Scalar
Target perl data structure that is able to be presented by JSON format.
$current_pointer : Str
JSON Pointer string to identify specified current position in the document.
$relative_pointer : Str
JSON Relative Pointer string to identify specified value from current position in the
document
$strict :Int
Strict mode. When this value equals true value, this method may throw exception on
error. When this value equals false value, this method return undef value on error.
contains($document :HashRef/ArrayRef/Scalar, $pointer :Str) :Int
$document :HashRef/ArrayRef/Scalar
Target perl data structure that is able to present by JSON format.
$pointer :Str
JSON Pointer string to identify specified value in the document.
Return which the target location identified by $pointer exists or not in the $document.
use JSON::Pointer;
my $document = { foo => 1 };
if (JSON::Pointer->contains($document, "/foo")) {
print "/foo exists";
}
add($document :HashRef/ArrayRef/Scalar, $pointer :Str, $value :HashRef/ArrayRef/Scalar)
:HashRef/ArrayRef/Scalar
$document :HashRef/ArrayRef/Scalar
Target perl data structure that is able to be presented by JSON format.
$pointer :Str
JSON Pointer string to identify specified value in the document.
$value :HashRef/ArrayRef/Scalar
The perl data structure that is able to be presented by JSON format.
Add specified $value on target location identified by $pointer in the $document. For
example,
use JSON::Pointer;
my $document = +{ foo => 1, };
my $value = +{ qux => "hello" };
my $patched_document = JSON::Pointer->add($document, "/bar", $value);
print $patched_document->{bar}{qux}; ### hello
remove($document, $pointer) :Array/Scalar
$document :HashRef/ArrayRef/Scalar
Target perl data structure that is able to be presented by JSON format.
$pointer :Str
JSON Pointer string to identify specified value in the document.
Remove target location identified by $pointer in the $document.
use JSON::Pointer;
my $document = { foo => 1 };
my $patched_document = JSON::Pointer->remove($document, "/foo");
unless (exists $patched_document->{foo}) {
print "removed /foo";
}
This method is contextial return value. When the return value of wantarray equals true,
return $patched_document and $removed_value, or not return $patched_document only.
replace($document :HashRef/ArrayRef/Scalar, $pointer :Str, $value :HashRef/ArrayRef/Scalar)
:Array/HashRef/ArrayRef/Scalar
$document :HashRef/ArrayRef/Scalar
Target perl data structure that is able to be presented by JSON format.
$pointer :Str
JSON Pointer string to identify specified value in the document.
$value :HashRef/ArrayRef/Scalar
The perl data structure that is able to be presented by JSON format.
Replace the value of target location specified by $pointer to the $value in the $document.
use JSON::Pointer;
my $document = { foo => 1 };
my $patched_document = JSON::Pointer->replace($document, "/foo", 2);
print $patched_document->{foo}; ## 2
This method is contextial return value. When the return value of wantarray equals true,
return $patched_document and $replaced_value, or not return $patched_document only.
set($document :HashRef/ArrayRef/Scalar, $pointer :Str, $value :HashRef/ArrayRef/Scalar)
:Array/HashRef/ArrayRef/Scalar
This method is alias of replace method.
copy($document :HashRef/ArrayRef/Scalar, $from_pointer :Str, $to_pointer :Str)
:HashRef/ArrayRef/Scalar
$document :HashRef/ArrayRef/Scalar
Target perl data structure that is able to be presented by JSON format.
$from_pointer :Str
JSON Pointer string to identify specified value in the document.
$to_pointer :Str
JSON Pointer string to identify specified value in the document.
Copy the value identified by $from_pointer to target location identified by $to_pointer.
For example,
use JSON::Pointer;
my $document = +{ foo => [ { qux => "hello" } ], bar => [ 1 ] };
my $patched_document = JSON::Pointer->copy($document, "/foo/0/qux", "/bar/-");
print $patched_document->{bar}[1]; ## hello
Note that "-" notation means next of last element in the array. In this example, "-"
means 1.
move($document :HashRef/ArrayRef/Scalar, $from_pointer :Str, $to_pointer :Str)
:HashRef/ArrayRef/Scalar
$document :HashRef/ArrayRef/Scalar
Target perl data structure that is able to be presented by JSON format.
$from_pointer :Str
JSON Pointer string to identify specified value in the document.
$to_pointer :Str
JSON Pointer string to identify specified value in the document.
Move the value identified by $from_pointer to target location identified by $to_pointer.
For example,
use JSON;
use JSON::Pointer;
my $document = +{ foo => [ { qux => "hello" } ], bar => [ 1 ] };
my $patched_document = JSON::Pointer->move($document, "/foo/0/qux", "/bar/-");
print encode_json($patched_document); ## {"bar":[1,"hello"],"foo":[{}]}
test($document :HashRef/ArrayRef/Scalar, $pointer :Str, $value :HashRef/ArrayRef/Scalar) :Int
$document :HashRef/ArrayRef/Scalar
Target perl data structure that is able to be presented by JSON format.
$pointer :Str
JSON Pointer string to identify specified value in the document.
$value :HashRef/ArrayRef/Scalar
The perl data structure that is able to be presented by JSON format.
Return which the value identified by $pointer equals $value or not in the $document. This
method distinguish type of each values.
use JSON::Pointer;
my $document = { foo => 1 };
print JSON::Pointer->test($document, "/foo", 1); ### 1
print JSON::Pointer->test($document, "/foo", "1"); ### 0
traverse($document, $pointer, $opts) : JSON::Pointer::Context
This method is used as internal implementation only.
DEPENDENCIES
Perl 5.8.1 or later.
BUGS
All complex software has bugs lurking in it, and this module is no exception. If you find
a bug please either email me, or add the bug to cpan-RT.
SEE ALSO
perl
Mojo::JSON::Pointer
Many codes in this module is inspired by the module.
<http://tools.ietf.org/html/rfc6901>
<http://tools.ietf.org/html/rfc6902>
<http://tools.ietf.org/html/draft-luff-relative-json-pointer-00>
AUTHOR
Toru Yamaguchi <zigorou at cpan.org>
LICENSE AND COPYRIGHT
Copyright (c) 2013, Toru Yamaguchi. All rights reserved.
This library is free software; you can redistribute it and/or modify it under the same
terms as Perl itself.