From: l.paige at live.com (Larry)
Date: Tue, 6 Sep 2011 20:37:24 -0700 (PDT)
Subject: [Pljava-dev] PlJava Function-Mapping
Message-ID: <1315366644852-4777098.post@n5.nabble.com>

I seem to having problems writing a PLJava function-mapping. Consider the
code examples shown below that demonstrates in a very simple manner the
problem I am having:

*Consider I define the following PL Java function in PostgreSQL:*

CREATE OR REPLACE FUNCTION stringtest(character varying)
RETURNS tuple AS
  'test.Org.getString'
LANGUAGE java VOLATILE

SELECT * FROM teststring(?hello?);

*The in Java I have:*

public class Org {

    public static boolean getString(String input, ResultSet receiver)
    throws SQLException{

        String input_ = Common.getParam2();
        receiver.updateString("first", input);
        receiver.updateString("second", input_);

        return true;
    }
}

public class Common {

    public static String getParam2(){
        try {
            Class.forName("org.postgresql.Driver");
            Connection connection = DriverManager.getConnection(
                    "jdbc:postgresql://localhost:5432/mydb",
                     ?username",
                     ?password");
            ResultSet rs = connection.createStatement().executeQuery(
                     "select id FROM events"  
            );
            if(rs.next())
                 return rs.getString("id");
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    return null;
    }

}

So now the problem is: if I don?t call /Common.param2()/ and instead just
hard-code some dummy-string everything works fine. But when I try calling
some other function, such as /.getParam2()/, I get an error, as follows:

/    ERROR:  java.lang.NoClassDefFoundError: Could not initialize class
java.net.InetAddress/

Clearly the above is just the standard SDK, so this is really confusing me
as to why it is happening.

Any help would be much appreciated.

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