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From: Lew <lewbloch@gmail.com>
Newsgroups: comp.lang.java.programmer
Subject: Re: Apache JDBC utils
Date: Wed, 2 May 2012 14:22:59 -0700 (PDT)
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Xref: csiph.com comp.lang.java.programmer:14152

Jan Burse wrote:
> *NO* reflection API was used at all, *NO* injection
> pattern was used, also no penguins where harmed. The
> framework consists of what would one call XDoclet today.
> 
> But instead of XDoclet I use JSP to generate via
> its output the Java code for the XXXBeans. The
> input are some property files and the JDBC access
> to the meta data of the already existing DB.
> 
> +--------+     +-------------+
> |   DB   |     | .properties |
> +--------+     +-------------+
>      |                |
>      ------      -----
>           |      |
>           v      v
>          +--------+
>          |  JSP   |
>          +--------+
>               |
>               v
>         +------------+
>         |  XXXBean   |
>         +------------+
> 
> Some part of the framework deals with invoking JSP
> without browser attention in kind of batch mode. But
> using JSP to generate Java code is straight forward.
> Check out genbean.jsp, it starts with:
> 
> public class <%=table%>Bean extends util.bean.BeanUtil {
>    private util.bean.ColumnDescriptor[] columndescriptors;
> 
> And as you might expect it can generate Java code and
> place what table has a value in front of Bean. Or something
> more elaborate:
> 
> <%
>    generator.bean.Column col=new generator.bean.Column();
>    col.setTable(tab);
>    col.list();
>    while (col.next()) {
> %>  private <%=col.getType()%> <%=col.getName()%>=<%=col.getNullConst()%>;
> <%
>    }
>    col.close();
> %>
> 
> The above iterates through the columns of the given table,
> and the generates variable declarations.

Scriptlet in JSP is an antipattern.

-- 
Lew