| /* |
| * Copyright 2016-present Open Networking Foundation |
| * |
| * 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 org.onosproject.roadm; |
| |
| import org.onlab.util.Frequency; |
| import org.onosproject.net.Annotations; |
| |
| import static com.google.common.base.Strings.isNullOrEmpty; |
| |
| /** |
| * Roadm utilities. |
| */ |
| public final class RoadmUtil { |
| |
| public static final String DEV_ID = "devId"; |
| public static final String VALID = "valid"; |
| public static final String MESSAGE = "message"; |
| public static final String NA = "N/A"; |
| public static final String UNKNOWN = "Unknown"; |
| public static final String NO_ROWS_MESSAGE = "No items found"; |
| |
| private RoadmUtil() { |
| } |
| |
| /** |
| * Formats Hz to GHz. |
| * |
| * @param value Hz in string format |
| * @return GHz in string format |
| */ |
| public static String asGHz(Frequency value) { |
| return value == null ? UNKNOWN : String.valueOf(value.asGHz()); |
| } |
| |
| /** |
| * Formats Hz to THz. |
| * |
| * @param value Hz in string format |
| * @return THz in string format |
| */ |
| public static String asTHz(Frequency value) { |
| return value == null ? UNKNOWN : String.valueOf(value.asTHz()); |
| } |
| |
| /** |
| * Gives a default value if the string is null or empty. |
| * |
| * @param value the string value |
| * @param defaultValue default value if null or empty |
| * @return processed string |
| */ |
| public static String defaultString(String value, String defaultValue) { |
| return isNullOrEmpty(value) ? defaultValue : value; |
| } |
| |
| /** |
| * Gives a default value if the object is null. |
| * |
| * @param object the object |
| * @param defaultValue default value if null |
| * @return processed string |
| */ |
| public static String objectToString(Object object, String defaultValue) { |
| return object == null ? defaultValue : String.valueOf(object); |
| } |
| |
| /** |
| * Gets value from annotations, if not exists, return default value. |
| * |
| * @param annotations the annotations |
| * @param key key value |
| * @param defaultValue default value |
| * @return value in string format |
| */ |
| public static String getAnnotation(Annotations annotations, String key, String defaultValue) { |
| return defaultString(annotations.value(key), defaultValue); |
| } |
| |
| /** |
| * Gets value from annotations, default value is NA. |
| * |
| * @param annotations the annotations |
| * @param key key value |
| * @return value in string format |
| */ |
| public static String getAnnotation(Annotations annotations, String key) { |
| return getAnnotation(annotations, key, NA); |
| } |
| } |