1 /* 2 * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package jdk.jshell; 27 28 import java.util.Locale; 29 import java.util.stream.Stream; 30 import java.util.stream.StreamSupport; 31 import javax.lang.model.element.Name; 32 import static jdk.internal.jshell.remote.RemoteCodes.DOIT_METHOD_NAME; 33 import static jdk.internal.jshell.remote.RemoteCodes.prefixPattern; 34 35 /** 36 * Assorted shared utilities. 37 * @author Robert Field 38 */ 39 class Util { 40 41 static final String REPL_CLASS_PREFIX = "$REPL"; 42 static final String REPL_DOESNOTMATTER_CLASS_NAME = REPL_CLASS_PREFIX+"00DOESNOTMATTER"; 43 44 static final Locale PARSED_LOCALE = Locale.ROOT; 45 46 static boolean isDoIt(Name name) { 47 return isDoIt(name.toString()); 48 } 49 50 static boolean isDoIt(String sname) { 51 return sname.equals(DOIT_METHOD_NAME); 52 } 53 54 static String expunge(String s) { 55 StringBuilder sb = new StringBuilder(); 56 for (String comp : prefixPattern.split(s)) { 57 sb.append(comp); 58 } 59 return sb.toString(); 60 } 61 62 static String asLetters(int i) { 63 if (i == 0) { 64 return ""; 65 } 66 67 char buf[] = new char[33]; 68 int charPos = 32; 69 70 i = -i; 71 while (i <= -26) { 72 buf[charPos--] = (char) ('A'-(i % 26)); 73 i = i / 26; 74 } 75 buf[charPos] = (char) ('A'-i); 76 77 return new String(buf, charPos, (33 - charPos)); 78 } 79 80 81 static String trimEnd(String s) { 82 int last = s.length() - 1; 83 int i = last; 84 while (i >= 0 && Character.isWhitespace(s.charAt(i))) { 85 --i; 86 } 87 if (i != last) { 88 return s.substring(0, i + 1); 89 } else { 90 return s; 91 } 92 } 93 94 static <T> Stream<T> stream(Iterable<T> iterable) { 95 return StreamSupport.stream(iterable.spliterator(), false); 96 } 97 98 static class Pair<T, U> { 99 final T first; 100 final U second; 101 102 Pair(T first, U second) { 103 this.first = first; 104 this.second = second; 105 } 106 } 107 }