| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.hadoop.yarn.server.resourcemanager.scheduler.fair; |
| |
| /** |
| * Utility class for the Fair Scheduler. |
| */ |
| public final class FairSchedulerUtilities { |
| |
| /** |
| * Table copied from Google Guava v19: |
| * org.apache.hadoop.thirdparty.com.google.common/base/CharMatcher.java |
| * <p> |
| * Licensed under the Apache License Version 2.0. |
| */ |
| static final String WHITESPACE_TABLE = |
| "\u2002\u3000\r\u0085\u200A\u2005\u2000\u3000" |
| + "\u2029\u000B\u3000\u2008\u2003\u205F\u3000\u1680" |
| + "\u0009\u0020\u2006\u2001\u202F\u00A0\u000C\u2009" |
| + "\u3000\u2004\u3000\u3000\u2028\n\u2007\u3000"; |
| |
| private FairSchedulerUtilities() { |
| // private constructor because this is a utility class. |
| } |
| |
| private static boolean isWhitespace(char c) { |
| for (int i = 0; i < WHITESPACE_TABLE.length(); i++) { |
| if (WHITESPACE_TABLE.charAt(i) == c) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| public static String trimQueueName(String name) { |
| if (name == null) { |
| return null; |
| } |
| int start = 0; |
| while (start < name.length() |
| && isWhitespace(name.charAt(start)) |
| && start < name.length()) { |
| start++; |
| } |
| int end = name.length() - 1; |
| while (end >= 0 |
| && isWhitespace(name.charAt(end)) |
| && end > start) { |
| end--; |
| } |
| return name.substring(start, end+1); |
| } |
| |
| } |