问在Perl的散列中包含散列

EN

my $stuff = do 'address.pl';

my %foo = ( "'address'" => 'blah' );

my %foo = ( address => 'blah' );

#!/usr/bin/perl

use JSON::XS;
use File::Spec;

use constant BASEDIR => '.';

# Key is the file name, value is the data to put into the file.
my %schemata = (
    'address.json' => {
        address => {
            street => { __type => 'String' },
            unit => {
                __type => 'String',
                __validation_function => { is_a_number => '' },
                __schema_constraints  => { is_not_null => ''  }
            },
            suburb => { __type => 'String' },
            __type => 'ARRAY'
        },
    },

    'person_contact.json' => {
         firstname => { __type => 'String' },
         lastname =>  { __type => 'String' },

         # Use a special key to indicate that additional files should be 
         # loaded into this hash.
         INCLUDE  => [qw( address.json )], 
     },

     # And so forth
);

for my $schema ( keys %schemata ) {
    my $path = File::Spec->catfile( BASEDIR, $schema );

    open my $fh, '>', $path
        or die "Error opening '$path' for writing - $!\n";

    print $fh encode_json $schemata{$schema};
}

#!/usr/bin/perl
use strict;
use warnings;

use Data::Dumper;

use JSON::XS;
use File::Spec;

use constant BASEDIR => '.';


my $schema = load_schema( 'person_contact.json' );

print Dumper $schema;


sub load_schema {
    my $file = shift;

    my $path = File::Spec->catfile( BASEDIR, $file );

    open my $fh, '<', $path
        or die "Error opening file '$path' - $!\n";

    my $json = join '', <$fh>; # reads a list of lines and cats them into one string.
                               # One way to slurp out of many.

    my $schema = decode_json( $json );

    # Handle the inclusion stuff:

    if( exists $schema->{INCLUDE} ) {
        # Copy the files to load into an array.
        my @loadme = @{$schema->{INCLUDE}};
        # delete the magic special include key.
        delete $schema->{INCLUDE};

        # Load each file and copy it into the schema hash.
        for my $load ( @loadme ) {
            my $loaded = load_schema( $load );

            # This is a bit of weird syntax.
            # We are using a hash slice assignment to copy the loaded data into the existing hash.
            # keys and values are guaranteed to come out in the same (random) order as each other.
            # the @{$foo}{blahbhal} is how you dereference a hash reference as a slice.
            @{$schema}{keys %$loaded} = values %$loaded;
        }
    }

    return $schema;
}