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###############################################################################

# Codestriker: Copyright (c) 2001, 2002 David Sitsky.  All rights reserved.

# sits@users.sourceforge.net

#

# This program is free software; you can redistribute it and modify it under

# the terms of the GPL.

package Codestriker::DB::SQLite;

use strict;

use DBI;

use Codestriker;

use Codestriker::DB::Database;

# Module for handling a SQLite embedded database.

@Codestriker::DB::SQLite::ISA = ("Codestriker::DB::Database");

# Type mappings.

my $_TYPE = {

    $Codestriker::DB::Column::TYPE->{TEXT}	=> "text",

    $Codestriker::DB::Column::TYPE->{VARCHAR}	=> "varchar",

    $Codestriker::DB::Column::TYPE->{INT32}	=> "integer",

    $Codestriker::DB::Column::TYPE->{INT16}	=> "integer",

    $Codestriker::DB::Column::TYPE->{DATETIME}	=> "datetime",

    $Codestriker::DB::Column::TYPE->{FLOAT}	=> "numeric"

};

# Create a new SQLite database object.

sub new {

    my $type = shift;

    # Database is parent class.

    my $self = Codestriker::DB::Database->new();

    return bless $self, $type;

}

# Return the DBD module this is dependent on.

sub get_module_dependencies {

    return { name => 'DBD::SQLite', version => '0' };

}

# Retrieve a database connection.

sub get_connection {

    my $self = shift;

    # SQLite supports transactions, don't enable auto_commit.

    return $self->_get_connection(0, 1);

}

# Return the mapping for a specific type.

sub _map_type {

    my ($self, $type) = @_;

    return $_TYPE->{$type};

}    

# Autoincrement type for SQLite.  No need to set this, as by default if

# no entry is set into an integer primary key field, it will act as an

# auto-increment field, provided it is the first column in a table.

sub _get_autoincrement_type {

    return "";

}

# Indicate if the LIKE operator can be applied on a "text" field.

# For SQLite, this is true.

sub has_like_operator_for_text_field {

    my $self = shift;

    return 1;

}

# Function for generating an SQL subexpression for a case insensitive LIKE

# operation.

sub case_insensitive_like {

    my ($self, $field, $expression) = @_;

    $expression = $self->{dbh}->quote($expression);

    # SQLite is case insensitive by default, no need to do anything.

    return "$field LIKE $expression";

}

1;