97 lines
2.9 KiB
Java
97 lines
2.9 KiB
Java
/* Copyright (C) 2017 Carsten Pfeiffer, João Paulo Barraca
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This file is part of Gadgetbridge.
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Gadgetbridge is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published
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by the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Gadgetbridge is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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package nodomain.freeyourgadget.gadgetbridge.util;
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import android.support.annotation.NonNull;
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public class StringUtils {
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@NonNull
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public static String truncate(String s, int maxLength){
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if (s == null) {
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return "";
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}
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int length = Math.min(s.length(), maxLength);
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if(length < 0) {
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return "";
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}
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return s.substring(0, length);
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}
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public static String pad(String s, int length){
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return pad(s, length, ' ');
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}
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public static String pad(String s, int length, char padChar){
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while(s.length() < length) {
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s += padChar;
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}
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return s;
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}
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/**
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* Joins the given elements and adds a separator between each element in the resulting string.
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* There will be no separator at the start or end of the string. There will be no consecutive
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* separators (even in case an element is null or empty).
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* @param separator the separator string
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* @param elements the elements to concatenate to a new string
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* @return the joined strings, separated by the separator
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*/
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@NonNull
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public static StringBuilder join(String separator, String... elements) {
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StringBuilder builder = new StringBuilder();
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if (elements == null) {
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return builder;
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}
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boolean hasAdded = false;
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for (String element : elements) {
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if (element != null && element.length() > 0) {
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if (hasAdded) {
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builder.append(separator);
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}
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builder.append(element);
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hasAdded = true;
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}
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}
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return builder;
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}
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@NonNull
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public static String getFirstOf(String first, String second) {
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if (first != null && first.length() > 0) {
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return first;
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}
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if (second != null) {
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return second;
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}
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return "";
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}
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public static boolean isEmpty(String string) {
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return string != null && string.length() == 0;
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}
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public static String ensureNotNull(String message) {
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if (message != null) {
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return message;
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}
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return "";
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}
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}
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