code: private String buildTablespaceClause(String tablespaceName) {
          if (tablespaceName == null || tablespaceName.trim().length() == 0) {
              return DEFAULT_TABLESPACE_CLAUSE;
          } else {
              return "tablespace " + tablespaceName.trim();
          }
      }
docs: Constructs the <code>tablespace &lt;tbs name&gt;</code> clause from
  the supplied tablespace name. If the name is empty, {@link #DEFAULT_TABLESPACE_CLAUSE}
  is returned instead.
  
  @param tablespaceName A tablespace name
  @return A tablespace clause using the supplied name or
  <code>{@value #DEFAULT_TABLESPACE_CLAUSE}</code> if the name is empty