toString and equals for jdbcconfiguration

andyredhead · **Posted:** Thu Oct 19, 2006 12:36 pm

Hi,

I'm thinking of adding the ability to create toString and equals methods to hbm2java when reverse engineering from a database.

The approach I'm considering so far is:

1) add methods to the ReverseEngineeringStrategy along the lines of:

List<Property> getPropertiesForToString(Table table)

List<Property> getPropertiesForEquals(Table table)

2) add an implemetation for the above methods which takes the equivalent of meta include-in-tostring and include-in-equals from additional elements inside <table> elements in reveng.xml

Before I start I'd like to know if:

Anyone has got something written already which lets me generate equals and tostring off a database schema...

If not, is the aproach I describe above sensible?

Cheers,

Andy

max · **Posted:** Thu Oct 19, 2006 12:50 pm

Hi Andy :),

did you notice that the latest version has a tableToMetaAttributes and columnToMetaAttributes in revengstrategy and accordingly there is a <meta> element available in reveng.xml ?

it doesn't make it explicit, but then you can atleast inject those meta attributes.

Ananasi · **Posted:** Thu Oct 19, 2006 12:52 pm

The version in SVN has a couple new methods in ReverseEngineeringStrategy:

Code:

public Map columnToMetaAttributes(TableIdentifier identifier, String column)
public Map tableToMetaAttributes(TableIdentifier tableIdentifier)

You should be able to leverage columnToMetaAttributes to generate the include-in-to-string meta attribute for the apporpriate columns. e.g.

Code:

   @Override
   public Map columnToMetaAttributes(TableIdentifier identifier, String column) {
      Map<String, MetaAttribute> metaAttributes = new HashMap<String, MetaAttribute>();
      if ("DONT_WANT_THIS_IN_TOSTRING".equalsIgnoreCase(column)    || 
            "DONT_WANT_THIS_IN_TOSTRING_EITHER".equalsIgnoreCase(column)  ||
            "DEFINITELY_DONT_WANT_THIS_IN_TOSTRING".equalsIgnoreCase(column)   ||
            "NO_TO_STRING_FOR_YOU".equalsIgnoreCase(column)) {
         MetaAttribute genProperty = new MetaAttribute("use-in-tostring");
         genProperty.addValue("false");
         metaAttributes.put("use-in-tostring", genProperty);
      }
      return metaAttributes;
   }

max · **Posted:** Thu Oct 19, 2006 12:56 pm

exactly.

I just have one correction:

Remember to call super.whatever(x,y,z) when you overwrite whatever(x,y,z) to collect what users might have defined in a reveng.xml.

andyredhead · **Posted:** Fri Oct 20, 2006 4:03 am

Thanks, I hadn't noticed the changes to revengstrategy - very grateful that you (both) pointed them out :)

I'll have a go with this later today.

Cheers,

Andy