1 /*
2 * Copyright (c) 2012, 2019, 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.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 /*
25 * @test
26 * @bug 7157626 8001112 8188870 8173382 8193290 8205619
27 * @summary Test major version for all legal combinations for -source and -target
28 * @author sgoel
29 *
30 * @modules jdk.compiler
31 */
32
33 import java.io.*;
34 import java.nio.*;
35 import java.util.*;
36 import java.util.regex.*;
37
38 /*
39 * If not explicitly specified the latest source and latest target
40 * values are the defaults. If explicitly specified, the target value
41 * has to be greater than or equal to the source value.
42 */
43 public class ClassVersionChecker {
44 private static enum Version {
45 SEVEN("7", 51),
46 EIGHT("8", 52),
47 NINE("9", 53),
48 TEN("10", 54),
49 ELEVEN("11", 55),
50 TWELVE("12", 56),
51 THIRTEEN("13", 57),
52 FOURTEEN("14", 58),
53 FIFTEEN("15", 59);
54
55 private Version(String release, int classFileVer) {
56 this.release = release;
57 this.classFileVer = classFileVer;
58 }
59 private final String release;
60 private final int classFileVer;
61
62 String release() {return release;}
63 int classFileVer() {return classFileVer;}
64 }
65
66 static final Version CURRENT;
67 static {
68 Version[] versions = Version.values();
69 int index = versions.length;
70 CURRENT = versions[index - 1];
71 }
72
73 int errors;
74
75 File javaFile = null;
76
77 public static void main(String[] args) throws Throwable {
78 new ClassVersionChecker().run();
79 }
80
81 void run() throws Exception {
82 writeTestFile();
83 /*
84 * Rules applicable for -source and -target combinations:
85 * 1. If both empty, version num is for the current release
86 * 2. If source is not empty and target is empty, version is
87 * based on the current release
88 * 3. If both non-empty, version is based on target
89 */
90 test("", "", CURRENT.classFileVer());
91 for (Version source : Version.values()) {
92 test(source.release(), "", CURRENT.classFileVer()); // no target
93 for (Version target : Version.values()) {
94 if (target.compareTo(source) < 0)
95 continue; // Target < source not a valid set of arguments
96 else {
97 logMsg("Running for src = " + source + " target = "+ target +
98 " expected = " + target.classFileVer());
99 test(source.release(), target.release(), target.classFileVer());
100 }
101 }
102 }
103
104 if (errors > 0)
105 throw new Exception(errors + " errors found");
106 }
107
108 void test(String i, String j, int expected) {
109 File classFile = compileTestFile(i, j, javaFile);
110 short majorVer = getMajorVersion(classFile);
111 checkVersion(majorVer, expected);
112 }
113
114 void writeTestFile() throws IOException {
115 javaFile = new File("Test.java");
116 try(PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(javaFile)));) {
117 out.println("class Test { ");
118 out.println(" public void foo() { }");
119 out.println("}");
120 } catch (IOException ioe) {
121 error("IOException while creating Test.java" + ioe);
122 }
123 }
124
125 File compileTestFile(String i, String j, File f) {
126 int rc = -1;
127 // Src and target are empty
128 if (i.isEmpty() && j.isEmpty() ) {
129 rc = compile("-g", f.getPath());
130 } else if( j.isEmpty()) { // target is empty
131 rc = compile("-source", i, "-g", f.getPath());
132 } else {
133 rc = compile("-source", i, "-target", j, "-g", f.getPath());
134 }
135 if (rc != 0)
136 throw new Error("compilation failed. rc=" + rc);
137 String path = f.getPath();
138 return new File(path.substring(0, path.length() - 5) + ".class");
139 }
140
141 int compile(String... args) {
142 return com.sun.tools.javac.Main.compile(args);
143 }
144
145 void logMsg (String str) {
146 System.out.println(str);
147 }
148
149 short getMajorVersion(File f) {
150 List<String> args = new ArrayList<String>();
151 short majorVer = 0;
152 try(DataInputStream in = new DataInputStream(new BufferedInputStream(new FileInputStream(f)));) {
153 in.readInt();
154 in.readShort();
155 majorVer = in.readShort();
156 System.out.println("major version:" + majorVer);
157 } catch (IOException e) {
158 error("IOException while reading Test.class" + e);
159 }
160 return majorVer;
161 }
162
163 void checkVersion(short majorVer, int expected) {
164 if (majorVer != expected ) {
165 error("versions did not match, Expected: " + expected + "Got: " + majorVer);
166 }
167 }
168
169 void error(String msg) {
170 System.out.println("error: " + msg);
171 errors++;
172 }
173 }