/**
 * personium.io
 * Copyright 2014 FUJITSU LIMITED
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.fujitsu.dc.core.model.lock;

import com.fujitsu.dc.core.DcCoreConfig;

/**
 * Lockキーを生成するクラス.
 */
public class LockKeyComposer {

    static final String KEY_SEPARATOR = "-";

    private LockKeyComposer() {
    }

    /**
     * ロック用のキーを生成する.
     * @param category ロックのカテゴリ名
     * @param key ロックキーに設定するUUIDを含んだ情報
     * @return ロックキー
     */
    public static String fullKeyFromCategoryAndKey(String category, String key) {
        StringBuilder sb = new StringBuilder(category);
        sb.append(KEY_SEPARATOR);
        sb.append(key);
        return sb.toString();
    }

    /**
     * ロック用のキーを生成する.
     * @param category ロックのカテゴリ名
     * @param cellId CellのID
     * @param boxId BoxのID
     * @param nodeId NodeのID
     * @return ロックキー
     */
    public static String fullKeyFromCategoryAndKey(String category, String cellId, String boxId, String nodeId) {
        return fullKeyFromCategoryAndKey(category, createLockScopeKey(cellId, boxId, nodeId));
    }

    private static String createLockScopeKey(String cellId, String boxId, String nodeId) {
        if (nodeId != null) {
            return nodeId;
        } else if (boxId != null) {
            return boxId;
        } else if (cellId != null) {
            return cellId;
        } else {
            // CellIDがNullの場合はunitPrefix
            return DcCoreConfig.getEsUnitPrefix();
        }
    }

}