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.\" ========================================================================
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.IX Title "SQL::Statement::TermFactory 3pm"
.TH SQL::Statement::TermFactory 3pm "2017-10-25" "perl v5.26.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
SQL::Statement::TermFactory \- Factory for SQL::Statement::Term instances
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 3
\&  my $termFactory = SQL::Statement::TermFactory\->new($stmt);
\&  my $whereTerms = $termFactory\->buildCondition( $stmt\->{where_clause} );
\&  my $col = $termFactory\->buildCondition( $stmt\->{col_obj}\->{$name}\->{content} );
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.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This package implements a factory to create type and operation based terms.
Those terms are used to access data from the table(s) \- either when evaluating
the where clause or returning column data.
.PP
The concept of a factory can be studied in \fIDesign Patterns\fR by the Gang of
Four. The concept of using polymorphism instead of conditions is suggested by
Martin Fowler in his book \fIRefactoring\fR.
.SH "METHODS"
.IX Header "METHODS"
.SS "buildCondition"
.IX Subsection "buildCondition"
Builds a condition object from a given (part of a) where clause. This method
calls itself recursively for \fIpredicates\fR.
.SH "AUTHOR AND COPYRIGHT"
.IX Header "AUTHOR AND COPYRIGHT"
Copyright (c) 2001,2005 by Jeff Zucker: jzuckerATcpan.org
Copyright (c) 2009\-2017 by Jens Rehsack: rehsackATcpan.org
.PP
All rights reserved.
.PP
You may distribute this module under the terms of either the \s-1GNU\s0
General Public License or the Artistic License, as specified in
the Perl \s-1README\s0 file.