1 /*
2 * Copyright (c) 2012, 2014, 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 com.sun.tools.sjavac;
27
28 import java.io.File;
29 import java.io.PrintWriter;
30 import java.io.StringWriter;
31 import java.nio.file.Path;
32 import java.util.Arrays;
33 import java.util.Collection;
34 import java.util.HashSet;
35 import java.util.Map;
36 import java.util.Set;
37 import java.util.StringTokenizer;
38 import java.util.function.Function;
39 import java.util.stream.Collectors;
40
41 /**
42 * Utilities.
43 *
44 * <p><b>This is NOT part of any supported API.
45 * If you write code that depends on this, you do so at your own risk.
46 * This code and its internal interfaces are subject to change or
47 * deletion without notice.</b>
48 */
49 public class Util {
50
51 public static String toFileSystemPath(String pkgId) {
52 if (pkgId == null || pkgId.length()==0) return null;
53 String pn;
54 if (pkgId.charAt(0) == ':') {
55 // When the module is the default empty module.
56 // Do not prepend the module directory, because there is none.
57 // Thus :java.foo.bar translates to java/foo/bar (or \)
58 pn = pkgId.substring(1).replace('.',File.separatorChar);
59 } else {
60 // There is a module. Thus jdk.base:java.foo.bar translates
61 // into jdk.base/java/foo/bar
62 int cp = pkgId.indexOf(':');
63 String mn = pkgId.substring(0,cp);
64 pn = mn+File.separatorChar+pkgId.substring(cp+1).replace('.',File.separatorChar);
65 }
66 return pn;
67 }
68
69 public static String justPackageName(String pkgName) {
70 int c = pkgName.indexOf(":");
71 if (c == -1)
72 throw new IllegalArgumentException("Expected ':' in package name (" + pkgName + ")");
73 return pkgName.substring(c+1);
74 }
75
76 public static String extractStringOption(String opName, String s) {
77 return extractStringOption(opName, s, null);
78 }
79
80 public static String extractStringOption(String opName, String s, String deflt) {
81 int p = s.indexOf(opName+"=");
82 if (p == -1) return deflt;
83 p+=opName.length()+1;
84 int pe = s.indexOf(',', p);
85 if (pe == -1) pe = s.length();
86 return s.substring(p, pe);
87 }
88
89 public static boolean extractBooleanOption(String opName, String s, boolean deflt) {
90 String str = extractStringOption(opName, s);
91 return "true".equals(str) ? true
92 : "false".equals(str) ? false
93 : deflt;
94 }
95
96 public static int extractIntOption(String opName, String s) {
97 return extractIntOption(opName, s, 0);
98 }
99
100 public static int extractIntOption(String opName, String s, int deflt) {
101 int p = s.indexOf(opName+"=");
102 if (p == -1) return deflt;
103 p+=opName.length()+1;
104 int pe = s.indexOf(',', p);
105 if (pe == -1) pe = s.length();
106 int v = 0;
107 try {
108 v = Integer.parseInt(s.substring(p, pe));
109 } catch (Exception e) {}
110 return v;
111 }
112
113 /**
114 * Clean out unwanted sub options supplied inside a primary option.
115 * For example to only had portfile remaining from:
116 * settings="--server:id=foo,portfile=bar"
117 * do settings = cleanOptions("--server:",Util.set("-portfile"),settings);
118 * now settings equals "--server:portfile=bar"
119 *
120 * @param allowsSubOptions A set of the allowed sub options, id portfile etc.
121 * @param s The option settings string.
122 */
123 public static String cleanSubOptions(Set<String> allowedSubOptions, String s) {
124 StringBuilder sb = new StringBuilder();
125 StringTokenizer st = new StringTokenizer(s, ",");
126 while (st.hasMoreTokens()) {
127 String o = st.nextToken();
128 int p = o.indexOf('=');
129 if (p>0) {
130 String key = o.substring(0,p);
131 String val = o.substring(p+1);
132 if (allowedSubOptions.contains(key)) {
133 if (sb.length() > 0) sb.append(',');
134 sb.append(key+"="+val);
135 }
136 }
137 }
138 return sb.toString();
139 }
140
141 /**
142 * Convenience method to create a set with strings.
143 */
144 public static Set<String> set(String... ss) {
145 Set<String> set = new HashSet<>();
146 set.addAll(Arrays.asList(ss));
147 return set;
148 }
149
150 /**
151 * Normalize windows drive letter paths to upper case to enable string
152 * comparison.
153 *
154 * @param file File name to normalize
155 * @return The normalized string if file has a drive letter at the beginning,
156 * otherwise the original string.
157 */
158 public static String normalizeDriveLetter(String file) {
159 if (file.length() > 2 && file.charAt(1) == ':') {
160 return Character.toUpperCase(file.charAt(0)) + file.substring(1);
161 } else if (file.length() > 3 && file.charAt(0) == '*'
162 && file.charAt(2) == ':') {
163 // Handle a wildcard * at the beginning of the string.
164 return file.substring(0, 1) + Character.toUpperCase(file.charAt(1))
165 + file.substring(2);
166 }
167 return file;
168 }
169
170 /**
171 * Locate the setting for the server properties.
172 */
173 public static String findServerSettings(String[] args) {
174 for (String s : args) {
175 if (s.startsWith("--server:")) {
176 return s;
177 }
178 }
179 return null;
180 }
181
182 public static <E> Set<E> union(Set<? extends E> s1,
183 Set<? extends E> s2) {
184 Set<E> union = new HashSet<>();
185 union.addAll(s1);
186 union.addAll(s2);
187 return union;
188 }
189
190 public static <E> Set<E> subtract(Set<? extends E> orig,
191 Set<? extends E> toSubtract) {
192 Set<E> difference = new HashSet<>(orig);
193 difference.removeAll(toSubtract);
194 return difference;
195 }
196
197 public static String getStackTrace(Throwable t) {
198 StringWriter sw = new StringWriter();
199 t.printStackTrace(new PrintWriter(sw));
200 return sw.toString();
201 }
202
203 // TODO: Remove when refactoring from java.io.File to java.nio.file.Path.
204 public static File pathToFile(Path path) {
205 return path == null ? null : path.toFile();
206 }
207
208 public static <E> Set<E> intersection(Collection<? extends E> c1,
209 Collection<? extends E> c2) {
210 Set<E> intersection = new HashSet<E>(c1);
211 intersection.retainAll(c2);
212 return intersection;
213 }
214
215 public static <I, T> Map<I, T> indexBy(Collection<? extends T> c,
216 Function<? super T, ? extends I> indexFunction) {
217 return c.stream().collect(Collectors.toMap(indexFunction, o -> o));
218 }
219 }