How to use

setProtectedFieldValue

method

in

org.springframework.security.util.FieldUtils

private MutableAcl initializeTransientFields(MutableAcl value) {
  if (value instanceof AclImpl) {
    FieldUtils.setProtectedFieldValue("aclAuthorizationStrategy", value,
        this.aclAuthorizationStrategy);
    FieldUtils.setProtectedFieldValue("permissionGrantingStrategy", value,
        this.permissionGrantingStrategy);
  }
  if (value.getParentAcl() != null) {
    initializeTransientFields((MutableAcl) value.getParentAcl());
  }
  return value;
}

private MutableAcl initializeTransientFields(MutableAcl value) {
  if (value instanceof AclImpl) {
    FieldUtils.setProtectedFieldValue("aclAuthorizationStrategy", value,
        this.aclAuthorizationStrategy);
    FieldUtils.setProtectedFieldValue("permissionGrantingStrategy", value,
        this.permissionGrantingStrategy);
  }
  if (value.getParentAcl() != null) {
    initializeTransientFields((MutableAcl) value.getParentAcl());
  }
  return value;
}

  @Test
  public void gettingAndSettingProtectedFieldIsSuccessful() throws Exception {
    new FieldUtils();

    Object tc = new TestClass();

    assertThat(FieldUtils.getProtectedFieldValue("protectedField", tc)).isEqualTo("x");
    assertThat(FieldUtils.getFieldValue(tc, "nested.protectedField")).isEqualTo("z");
    FieldUtils.setProtectedFieldValue("protectedField", tc, "y");
    assertThat(FieldUtils.getProtectedFieldValue("protectedField", tc)).isEqualTo("y");

    try {
      FieldUtils.getProtectedFieldValue("nonExistentField", tc);
    }
    catch (IllegalStateException expected) {
    }
  }
}

private MutableAcl initializeTransientFields(MutableAcl value) {
  if (value instanceof AclImpl) {
    FieldUtils.setProtectedFieldValue("aclAuthorizationStrategy", value,
        this.aclAuthorizationStrategy);
    FieldUtils.setProtectedFieldValue("permissionGrantingStrategy", value,
        this.permissionGrantingStrategy);
  }
  if (value.getParentAcl() != null) {
    initializeTransientFields((MutableAcl) value.getParentAcl());
  }
  return value;
}

private MutableAcl initializeTransientFields(MutableAcl value) {
  if (value instanceof AclImpl) {
    FieldUtils.setProtectedFieldValue("aclAuthorizationStrategy", value,
        this.aclAuthorizationStrategy);
    FieldUtils.setProtectedFieldValue("permissionGrantingStrategy", value,
        this.permissionGrantingStrategy);
  }
  if (value.getParentAcl() != null) {
    initializeTransientFields((MutableAcl) value.getParentAcl());
  }
  return value;
}