@CanIgnoreReturnValue
  private boolean delete(File file) {
    if (file.isDirectory()) {
      File[] files = file.listFiles();
      if (files != null) {
        for (File f : files) {
          if (!delete(f)) {
            return false;
          }
        }
      }
    }

    if (!file.delete()) {
      logger.log(Level.WARNING, "couldn't delete file: {0}", new Object[] {file});
      return false;

            dataService.iterate(sessionId2, accessResult -> assertTrue(accessResult.getUrl().startsWith(url2)));

            dataService.delete(sessionId1);
            dataService.delete(sessionId2);
        } finally {
            try {
                server1.stop();
            } finally {
                server2.stop();
            }
        }
    }

	// Delete
	if err := DB.Model(&user2).Association("Company").Delete(&Company{}); err != nil {
		t.Fatalf("Error happened when delete Company, got %v", err)
	}
	AssertAssociationCount(t, user2, "Company", 1, "after delete non-existing data")

	if err := DB.Model(&user2).Association("Company").Delete(&company2); err != nil {
		t.Fatalf("Error happened when delete Company, got %v", err)
	}

}

// setPutObjHeaders sets all the necessary headers returned back
// upon a success Put/Copy/CompleteMultipart/Delete requests
// to activate delete only headers set delete as true
func setPutObjHeaders(w http.ResponseWriter, objInfo ObjectInfo, delete bool, h http.Header) {
	// We must not use the http.Header().Set method here because some (broken)

		return
	}

	users := []*User{
		GetUser("delete-returning-1", Config{}),
		GetUser("delete-returning-2", Config{}),
		GetUser("delete-returning-3", Config{}),
	}
	DB.Create(&users)

	var results []User
	DB.Where("name IN ?", []string{users[0].Name, users[1].Name}).Clauses(clause.Returning{}).Delete(&results)
	if len(results) != 2 {
		t.Errorf("failed to return delete data, got %v", results)
	}

	var count int64

	var err error
	// belongs to
	err = DB.Model(&emptyUser).Association("Company").Delete(&user1.Company)
	AssertEqual(t, err, gorm.ErrPrimaryKeyRequired)
	// has many
	err = DB.Model(&emptyUser).Association("Pets").Delete(&user1.Pets)
	AssertEqual(t, err, gorm.ErrPrimaryKeyRequired)
	// has one
	err = DB.Model(&emptyUser).Association("Account").Delete(&user1.Account)
	AssertEqual(t, err, gorm.ErrPrimaryKeyRequired)
	// many to many

    if (oldEntryForValue != null) {
      if (force) {
        delete(oldEntryForValue);
      } else {
        throw new IllegalArgumentException("value already present: " + value);
      }
    }

    BiEntry<K, V> newEntry = new BiEntry<>(key, keyHash, value, valueHash);
    if (oldEntryForKey != null) {
      delete(oldEntryForKey);
      insert(newEntry, oldEntryForKey);

        }
        arraySettings.add(BAD_WORD_SETTINGD_KEY, badWord);
    }

    public void delete(final String badWord) {
        if (logger.isDebugEnabled()) {
            logger.debug("Delete badword. {} badword: {}", arraySettings.arraySettingsIndexName, badWord);
        }
        arraySettings.delete(BAD_WORD_SETTINGD_KEY, badWord);
    }

    public void deleteAll() {
        if (logger.isDebugEnabled()) {

					continue
				}
				// Collect uids, so we don't mutate while we delete
				uids := make([]string, 0, len(lris))
				for _, lri := range lris {
					uids = append(uids, lri.UID)
				}

				// Delete collected uids:
				for _, uid := range uids {
					lris, ok := l.lockMap[resource]
					if !ok {
						// Just to be safe, delete uuids.
						for idx := 0; idx < maxDeleteList; idx++ {

	// Delete
	if err := DB.Model(&user2).Association("Pets").Delete(&Pet{}); err != nil {
		t.Fatalf("Error happened when delete pet, got %v", err)
	}
	AssertAssociationCount(t, user2, "Pets", 1, "after delete non-existing data")

	if err := DB.Model(&user2).Association("Pets").Delete(&pet2); err != nil {
		t.Fatalf("Error happened when delete Pets, got %v", err)
	}