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# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
package Avro::Protocol;
use strict;
use warnings;
use Carp;
use JSON::XS();
use Try::Tiny;
use Avro::Protocol::Message;
use Avro::Schema;
use Error;
use Object::Tiny qw{
name
namespace
doc
types
messages
};
my $json = JSON::XS->new->allow_nonref;
sub parse {
my $class = shift;
my $enc_proto = shift
or throw Avro::Protocol::Error::Parse("protocol cannot be empty");
my $struct = try {
$json->decode($enc_proto);
}
catch {
throw Avro::Protocol::Error::Parse(
"Cannot parse json string: $_"
);
};
return $class->from_struct($struct);
}
sub from_struct {
my $class = shift;
my $struct = shift || {};
my $name = $struct->{protocol};
unless (defined $name or length $name) {
throw Avro::Protocol::Error::Parse("protocol name is required");
}
my $types = $class->parse_types($struct->{types});
my $messages = $class->parse_messages($struct->{messages}, $types)
if $struct->{messages};
my $protocol = $class->SUPER::new(
name => $name,
namespace => $struct->{namespace},
doc => $struct->{doc},
types => $types,
messages => $messages,
);
return $protocol;
}
sub parse_types {
my $class = shift;
my $types = shift || [];
my %types;
my $names = {};
for (@$types) {
try {
my $schema = Avro::Schema->parse_struct($_, $names);
$types{ $schema->fullname } = $schema;
}
catch {
throw Avro::Protocol::Error::Parse("errors in parsing types: $_");
};
}
return \%types;
}
sub parse_messages {
my $class = shift;
my $messages = shift || {};
my $types = shift;
my $m = {};
for my $name (keys %$messages) {
$m->{$name} = Avro::Protocol::Message->new($messages->{$name}, $types);
}
return $m;
}
sub fullname {
my $protocol = shift;
return join ".", grep { $_ } map { $protocol->$_ } qw{ namespace name };
}
package Avro::Protocol::Error::Parse;
use parent 'Error::Simple';
1;
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