Hub::Knots::TiedObject - Tied object

In your class:

  package __Package_Name__;
  use Hub qw(:lib);
  sub new {
    my $self = shift;
    my $class = ref( $self ) || $self;
    my $obj = bless {}, $class;
    tie %$obj, 'Hub::Knots::TiedObject', '__Tie_Package__';
    return $obj;
  }#new

Perl5 does not let one implement tie methods for a normal blessed package. To get around this, the above constructor ties the blessed reference to this package, providing '__Tie_Package__' as the package which should implement the tie methods.

To transparently provide `tie' methods inline with an existing class. For example, one may have a User class which supports several methods, such as `print', and we wish to update the database on the fly...

    my $user = new User( $conn, 'mary', 'alzxjVT8kR.aU' );
    $user->{'lname'} = "Lopez";
    $user->print();

TiedObject simply provides two hashes for the object: `public' and `private'. When data members are accessed, the 'public' hash is acted upon. If the index begins with an asterisk (*) then the private hash is used. The only values currently in the private hash are:

    $self->{'*tied'};         # Points to the reference returned by tie-ing 
                              # '__Tie_Package__' to the public hash.

    $self->{'*public'};       # Points to the public hash

Determine which key (public or private) to use

Tie interface method

 Usage: TIEHASH 'Hub::Knots::TiedObject', $PACKAGE

Return a value

Store a value

Remove a value

Remove all public values

Boolean test for value

Tie interface method

Tie interface method

Scalar representation

Tie interface method

Ryan Gies (ryangies@livesite.net)

Copyright (C) 2006-2007 by Livesite Networks, LLC. All rights reserved.

Copyright (C) 2000-2005 by Ryan Gies. All rights reserved.

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THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

To the best of our knowledge, no patented algorithms have been used. However, we do not have the resources to carry out a patent search, and therefore cannot give any guarantee of the above statement.

08/02/2007