无法删除LDAP条目

Question

我想在java中删除带有DN的LDAP条目。我有以下代码：

private void deleteUserAssociations(String customer) throws Exception {

    DirContext ctx = null;
    @SuppressWarnings("rawtypes")
    NamingEnumeration results = null;

    if (customer != null) {
        ctx = new InitialDirContext(env);
        SearchControls controls = new SearchControls();
        controls.setSearchScope(SearchControls.SUBTREE_SCOPE);
        results = ctx.search("", "(customer=" + customer+ ")", controls);
        while (results.hasMore()) {
            SearchResult searchResult = (SearchResult) results.next();
            String NameSpaceToDelete = searchResult.getNameInNamespace();
            LdapContext ctxTemp = new InitialLdapContext(env, null);
            Control[] tdCtls = new Control[]{new TreeDeleteControl()};
            ctxTemp.setRequestControls(tdCtls);
            ctxTemp.destroySubcontext(NameSpaceToDelete);
            ctxTemp.close();
        }

    }
}

该方法将客户ID删除，搜索LDAP中的条目并尝试使用Tree Delete Control删除该条目。 Tree Delete Control类如下：

class TreeDeleteControl implements Control 
{
  public byte[] getEncodedValue() {
    return new byte[] {};
  }

  public String getID() {
    return "1.2.840.113556.1.4.805";
  }

  public boolean isCritical() {
    return true;
  }
}

问题：代码运行时没有任何错误/异常，但它不会删除任何条目。执行代码后，我可以从LDAP浏览器（JXplorer）中看到所有客户。

请帮忙。