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Merge pull request #704 from nextcloud/taaem-fix
Taaem fix
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,68 @@ | ||
| /** | ||
| * Nextcloud Android client application | ||
| * | ||
| * @author Mario Danic | ||
| * Copyright (C) 2017 Mario Danic | ||
| * <p> | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU Affero General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * at your option) any later version. | ||
| * <p> | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU Affero General Public License for more details. | ||
| * <p> | ||
| * You should have received a copy of the GNU Affero General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
| package com.owncloud.android.utils; | ||
|
|
||
| import java.lang.ref.WeakReference; | ||
| import java.math.BigInteger; | ||
| import java.security.SecureRandom; | ||
| import java.util.HashMap; | ||
| import java.util.Map; | ||
|
|
||
| /** | ||
| * Data holder utility to store & retrieve stuff | ||
| */ | ||
|
|
||
| public class DataHolderUtil { | ||
| private Map<String, WeakReference<Object>> data = new HashMap<String, WeakReference<Object>>(); | ||
|
|
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| private static DataHolderUtil instance; | ||
|
|
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| private SecureRandom random = new SecureRandom(); | ||
|
|
||
| public static synchronized DataHolderUtil getInstance() { | ||
| if (instance == null) { | ||
| instance = new DataHolderUtil(); | ||
| } | ||
| return instance; | ||
| } | ||
|
|
||
| public void save(String id, Object object) { | ||
| data.put(id, new WeakReference<Object>(object)); | ||
| } | ||
|
|
||
| public Object retrieve(String id) { | ||
| WeakReference<Object> objectWeakReference = data.get(id); | ||
| return objectWeakReference.get(); | ||
| } | ||
|
|
||
| public void delete(String id) { | ||
| if (id != null) { | ||
| data.remove(id); | ||
| } | ||
| } | ||
|
|
||
| public String nextItemId() { | ||
| String nextItemId = new BigInteger(130, random).toString(32); | ||
| while (data.containsKey(nextItemId)) { | ||
| nextItemId = new BigInteger(130, random).toString(32); | ||
| } | ||
| return nextItemId; | ||
| } | ||
| } |