Catmandu::Path::simple

NAME

Catmandu::Path::simple - The default Catmandu path syntax

SYNOPSIS

    my $data = {foo => {bar => ['first_bar', 'second_bar']}};
    my $path = Catmandu::Path::simple->new("foo.bar.0");
    my $getter = $path->getter;
    my $first_bar = $getter->($data);
    my $updater = $path->updater(sub { my $str = $_[0]; uc $str });
    $updater->($data);
    # => {foo => {bar => ['FIRST_BAR', 'second_bar']}}
    # safer version with a type check
    my $updater = $path->updater(if_string => sub { my $str = $_[0]; uc $str });

CONFIGURATION

path

The string version of the path. Required.

METHODS

getter

Returns a coderef that can get the values for the path. The coderef takes the data as argument and returns the matching values as an arrayref.

    my $path = Catmandu::Path::Simple->new(path => '$.foo');
    my $data = {foo => 'foo', bar => 'bar'};
    $path->getter->($data);
    # => ['foo']

setter

Returns a coderef that can create the final part of the path and set it's value. In contrast to "creator" this will only set the value if the intermediate path exists. The coderef takes the data as argument and also returns the data.

    my $path = Catmandu::Path::Simple->new(path => '$.foo.$append');
    $path->creator(value => 'foo')->({});
    # => {foo => ['foo']}
    $path->creator(value => sub { my ($val, $data) = @_; $val // 'foo' })->({});
    # => {foo => ['foo']}
    # calling creator with no value creates a sub that takes the value as an
    # extra argument
    $path->creator->({}, 'foo');
    $path->creator->({}, sub { my ($val, $data) = @_; $val // 'foo' });
    # => {foo => ['foo']}

setter(\&callback|$value)

This is a shortcut for "setter(value =" \&callback|$value)>.

updater(value => \&callback)

Returns a coderef that can update the value of an existing path.

updater(if_* => [\&callback])

TODO

updater(if => [\&callback])

TODO

updater(if_* => \&callback)

TODO

updater(if => \&callback)

TODO

updater(\&callback)

This is a shortcut for "updater(value =" \&callback|$value)>.

creator(value => \&callback|$value)

Returns a coderef that can create the path and set it's value. In contrast to "setter" this also creates the intermediate path if necessary. The coderef takes the data as argument and also returns the data.

    my $path = Catmandu::Path::Simple->new(path => '$.foo.$append');
    $path->creator(value => 'foo')->({});
    # => {foo => ['foo']}
    $path->creator(value => sub { my ($val, $data) = @_; $val // 'foo' })->({});
    # => {foo => ['foo']}
    # calling creator with no value creates a sub that takes the value as an
    # extra argument
    $path->creator->({}, 'foo');
    $path->creator->({}, sub { my ($val, $data) = @_; $val // 'foo' });
    # => {foo => ['foo']}

creator(\&callback|$value)

This is a shortcut for "creator(value =" \&callback|$value)>.

deleter

Returns a coderef that can delete the path. The coderef takes the data as argument and also returns the data.

    my $path = Catmandu::Path::Simple->new(path => '$.foo');
    $path->deleter->({foo => 'foo', bar => 'bar'});
    # => {bar => 'bar'}

SEE ALSO

Catmandu::Path.