public String renderConstraints(INode home, INode nonvirtual)
public void renderConstraints(StringBuffer q, INode home, INode nonvirtual, String prefix)
    public String renderConstraints(INode home, INode nonvirtual)                             throws SQLException {        StringBuffer q = new StringBuffer();        String prefix = " AND ";        for (int i = 0; i < constraints.length; i++) {            q.append(prefix);            constraints[i].addToQuery(q, home, nonvirtual);        }        if (filter != null) {            appendFilter(q, nonvirtual, prefix);        }        return q.toString();    }