Free database of managed objects software for linux

Database Functions is a PHP class that can be used to build and execute MySQL database queries.

It can build SELECT, INSERT, UPDATE and DELETE queries from lists of parameters and values.

The class can also execute the generated queries and retrieve the SELECT query results into associative arrays.

QDBM is a library of routines for managing a database. The QDBM database is a simple data file containing records, each is a pair of a key and a value.
Every key and value is serial bytes with variable length. Both binary data and character string can be used as a key and a value. There is neither concept of data tables nor data types. Records are organized in hash table or B+ tree.
As for database of hash table, each key must be unique within a database, so it is impossible to store two or more records with a key overlaps. The following access methods are provided to the database: storing a record with a key and a value, deleting a record by a key, retrieving a record by a key.
Moreover, traversal access to every key are provided, although the order is arbitrary. These access methods are similar to ones of DBM (or its followers: NDBM and GDBM) library defined in the UNIX standard. QDBM is an alternative for DBM because of its higher performance.
As for database of B+ tree, records whose keys are duplicated can be stored. Access methods of storing, deleting, and retrieving are provided as with the database of hash table. Records are stored in order by a comparing function assigned by a user. It is possible to access each record with the cursor in ascending or descending order.
According to this mechanism, forward matching search for strings and range search for integers are realized. Moreover, transaction is available in database of B+ tree.
QDBM is written in C, and provided as APIs of C, C++, Java, Perl, and Ruby.
QDBM is available on platforms which have API conforming to POSIX.
Enhancements:
- The utility API was enhanced.
- A bug related to B+ tree API for Ruby was fixed.

Active Objects is an implementation of the Active Object concept based on the boost::thread, boost::bind, and boost::function libraries.
The point of the library is to make taking advantage of multiprocessor machines as easy as possible. The library provides two types of functionality. The first is the ability to execute a function in a separate thread and automatically synchronize with the thread when the return value is needed.
The second is the ability to easily create a message cue for any existing class, and have that class process its messages asynchronously.
Enhancements:
- Minor code cleanup and code documentation updates.

SQLiteManager is a multilingual Web-based tool to manage SQLite databases.
SQLiteManager features multiple database management, creation, and connectivity, property and options management, table, data, and index manipulation, the ability to import data from a file, conversion from MySQL queries, view, trigger, and custom functio
Enhancements:
- Now SQLiteManager allow to manage SQLite2 and SQLite3 database simultaneously.
- The database version and environment possibility is automatically detected.

Ace::Object is a Perl module to manipulate Ace Data Objects.

SYNOPSIS

# open database connection and get an object
use Ace;
$db = Ace->connect(-host => beta.crbm.cnrs-mop.fr,
-port => 20000100);
$sequence = $db->fetch(Sequence => D12345);

# Inspect the object
$r = $sequence->at(Visible.Overlap_Right);
@row = $sequence->row;
@col = $sequence->col;
@tags = $sequence->tags;

# Explore object substructure
@more_tags = $sequence->at(Visible)->tags;
@col = $sequence->at("Visible.$more_tags[1]")->col;

# Follow a pointer into database
$r = $sequence->at(Visible.Overlap_Right)->fetch;
$next = $r->at(Visible.Overlap_left)->fetch;

# Classy way to do the same thing
$r = $sequence->Overlap_right;
$next = $sequence->Overlap_left;

# Pretty-print object
print $sequence->asString;
print $sequence->asTabs;
print $sequence->asHTML;

# Update object
$sequence->replace(Visible.Overlap_Right,$r,M55555);
$sequence->add(Visible.Homology,GR91198);
$sequence->delete(Source.Clone,MBR122);
$sequence->commit();

# Rollback changes
$sequence->rollback()

# Get errors
print $sequence->error;

Ace::Object is the base class for objects returned from ACEDB databases. Currently there is only one type of Ace::Object, but this may change in the future to support more interesting object-specific behaviors.

Using the Ace::Object interface, you can explore the internal structure of an Ace::Object, retrieve its content, and convert it into various types of text representation. You can also fetch a representation of any object as a GIF image.

If you have write access to the databases, add new data to an object, replace existing data, or kill it entirely. You can also create a new object de novo and write it into the database.

Zild Database Library implements a small and easy to use database API with an easy to use API.
Main features:
- ability to connect to multiple database systems
- zero runtime configuration
- ability to connect using a URL scheme
- thread-safe connection pooling.

Games::Object is a Perl module to provide a base class for game objects.

SYNOPSIS

package MyGameObject;
use Games::Object;
use vars qw(@ISA);
@ISA = qw(Games::Object);

sub new {
# Create object
my $proto = shift;
my $class = ref($proto) || $proto;
my $self = $class->SUPER::new(@_);
bless $self, $class;

# Add attributes
$self->new_attr(-name => "hit_points",
-type => int,
-value => 20,
-tend_to_rate => 1);
$self->new_attr(-name => "strength",
-type => int,
-value => 12,
-minimum => 3,
-maximum => 18);
...

return $self;
}

package MyObjectManager;
use Games::Object::Manager;
use vars qw(@ISA);
@ISA = qw(Games::Object::Manager);

sub new {
my $proto = shift;
my $class = ref($proto) || $proto;
my $self = $class->SUPER::new( , @_);
bless $self, $class;
...
return $self;
}


my $world = new MyObjectManager;
my $object = new MyGameObject;
$world->add($object);

ABSTRACT

The purpose of this module is to allow a programmer to write a game in Perl easily by providing a basic framework in the form of a module that can be either subclassed to a module of your own or used directly as its own object class. The most important items in this framework are:

Attributes

You can define arbitrary attributes on objects with rules on how they may be updated, as well as set up automatic update of attributes whenever the objects process() method is invoked. For example, you could set an attribute on an object such that:

It ranges from 0 to 100.

Internally it tracks fractional changes to the value but accessing the attribute will always round the result to an integer.

It will automatically tend towards the maximum by 1 every time process() is called on the object.

A method in your subclass will be invoked automatically if the value falls to 0.
This is just one example of what you can do with attributes.

Flags

You can define any number of arbitrarily-named flags on an object. A flag is a little like a boolean attribute, in that it can have a value of either true or false. Like attributes, flags can be created independently on different objects. No "global" flag list is imposed.

Load/Save functionality

Basic functionality is provided for saving data from an object to a file, and for loading data back into an object. This handles the bulk of load game / save game processing, freeing the programmer to worry about the mechanics of the game itself.

The load functionality can also be used to create objects from object templates. An object template would be a save file that contains a single object.

Object Managers

New to version 0.10 of this module is object managers. An object manager is a Perl object that allows you to manage groups of related game objects. The object manager allows you to relate objects together (for example, you could define a relationship that allows certain objects to act as containers for other objects). In effect, the object manager acts as your world or universe.
Like the game object class, the manager class can be subclassed, allowing you augment its functionality. An object manager can be loaded and saved, which in turn performs a load or save of the objects being managed by it.