CONTENTS

• NAME
• SYNOPSIS
• ABSTRACT
• Description
  • Predefined Methods
  • Example: base64 transcoder
  • Operator Overloading
• SEE ALSO

#NAME

Encode::Encoder -- Object Oriented Encoder

#SYNOPSIS

use Encode::Encoder;
# Encode::encode("ISO-8859-1", $data); 
Encode::Encoder->new($data)->iso_8859_1; # OOP way
# shortcut
use Encode::Encoder qw(encoder);
encoder($data)->iso_8859_1;
# you can stack them!
encoder($data)->iso_8859_1->base64;  # provided base64() is defined
# you can use it as a decoder as well
encoder($base64)->bytes('base64')->latin1;
# stringified
print encoder($data)->utf8->latin1;  # prints the string in latin1
# numified
encoder("\x{abcd}\x{ef}g")->utf8 == 6; # true. bytes::length($data)

#ABSTRACT

Encode::Encoder allows you to use Encode in an object-oriented style. This is not only more intuitive than a functional approach, but also handier when you want to stack encodings. Suppose you want your UTF-8 string converted to Latin1 then Base64: you can simply say

my $base64 = encoder($utf8)->latin1->base64;

instead of

my $latin1 = encode("latin1", $utf8);
my $base64 = encode_base64($utf8);

or the lazier and more convoluted

my $base64 = encode_base64(encode("latin1", $utf8));

#Description

Here is how to use this module.

• There are at least two instance variables stored in a hash reference, {data} and {encoding}.

• When there is no method, it takes the method name as the name of the encoding and encodes the instance data with encoding. If successful, the instance encoding is set accordingly.

• You can retrieve the result via ->data but usually you don't have to because the stringify operator ("") is overridden to do exactly that.

#Predefined Methods

This module predefines the methods below:

#$e = Encode::Encoder->new([$data, $encoding]);

returns an encoder object. Its data is initialized with $data if present, and its encoding is set to $encoding if present.

When $encoding is omitted, it defaults to utf8 if $data is already in utf8 or "" (empty string) otherwise.

#encoder()

is an alias of Encode::Encoder->new(). This one is exported on demand.

#$e->data([$data])

When $data is present, sets the instance data to $data and returns the object itself. Otherwise, the current instance data is returned.

#$e->encoding([$encoding])

When $encoding is present, sets the instance encoding to $encoding and returns the object itself. Otherwise, the current instance encoding is returned.

#$e->bytes([$encoding])

decodes instance data from $encoding, or the instance encoding if omitted. If the conversion is successful, the instance encoding will be set to "".

The name bytes was deliberately picked to avoid namespace tainting -- this module may be used as a base class so method names that appear in Encode::Encoding are avoided.