1 /*
2 * Copyright (c) 2012, 2018, 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 SIX("6", 50),
46 SEVEN("7", 51),
47 EIGHT("8", 52),
48 NINE("9", 53),
49 TEN("10", 54),
50 ELEVEN("11", 55),
51 TWELVE("12", 56);
52
53 private Version(String release, int classFileVer) {
54 this.release = release;
55 this.classFileVer = classFileVer;
56 }
57 private final String release;
58 private final int classFileVer;
59
60 String release() {return release;}
61 int classFileVer() {return classFileVer;}
62 }
63
64 static final Version CURRENT;
65 static {
66 Version[] versions = Version.values();
67 int index = versions.length;
68 CURRENT = versions[index - 1];
69 }
70
71 int errors;
72
73 File javaFile = null;
74
75 public static void main(String[] args) throws Throwable {
76 new ClassVersionChecker().run();
77 }
78
79 void run() throws Exception {
80 writeTestFile();
81 /*
82 * Rules applicable for -source and -target combinations:
83 * 1. If both empty, version num is for the current release
84 * 2. If source is not empty and target is empty, version is
85 * based on the current release
86 * 3. If both non-empty, version is based on target
87 */
88 test("", "", CURRENT.classFileVer());
89 for (Version source : Version.values()) {
90 test(source.release(), "", CURRENT.classFileVer()); // no target
91 for (Version target : Version.values()) {
92 if (target.compareTo(source) < 0)
93 continue; // Target < source not a valid set of arguments
94 else {
95 logMsg("Running for src = " + source + " target = "+ target +
96 " expected = " + target.classFileVer());
97 test(source.release(), target.release(), target.classFileVer());
98 }
99 }
100 }
101
102 if (errors > 0)
103 throw new Exception(errors + " errors found");
104 }
105
106 void test(String i, String j, int expected) {
107 File classFile = compileTestFile(i, j, javaFile);
108 short majorVer = getMajorVersion(classFile);
109 checkVersion(majorVer, expected);
110 }
111
112 void writeTestFile() throws IOException {
113 javaFile = new File("Test.java");
114 try(PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(javaFile)));) {
115 out.println("class Test { ");
116 out.println(" public void foo() { }");
117 out.println("}");
118 } catch (IOException ioe) {
119 error("IOException while creating Test.java" + ioe);
120 }
121 }
122
123 File compileTestFile(String i, String j, File f) {
124 int rc = -1;
125 // Src and target are empty
126 if (i.isEmpty() && j.isEmpty() ) {
127 rc = compile("-g", f.getPath());
128 } else if( j.isEmpty()) { // target is empty
129 rc = compile("-source", i, "-g", f.getPath());
130 } else {
131 rc = compile("-source", i, "-target", j, "-g", f.getPath());
132 }
133 if (rc != 0)
134 throw new Error("compilation failed. rc=" + rc);
135 String path = f.getPath();
136 return new File(path.substring(0, path.length() - 5) + ".class");
137 }
138
139 int compile(String... args) {
140 return com.sun.tools.javac.Main.compile(args);
141 }
142
143 void logMsg (String str) {
144 System.out.println(str);
145 }
146
147 short getMajorVersion(File f) {
148 List<String> args = new ArrayList<String>();
149 short majorVer = 0;
150 try(DataInputStream in = new DataInputStream(new BufferedInputStream(new FileInputStream(f)));) {
151 in.readInt();
152 in.readShort();
153 majorVer = in.readShort();
154 System.out.println("major version:" + majorVer);
155 } catch (IOException e) {
156 error("IOException while reading Test.class" + e);
157 }
158 return majorVer;
159 }
160
161 void checkVersion(short majorVer, int expected) {
162 if (majorVer != expected ) {
163 error("versions did not match, Expected: " + expected + "Got: " + majorVer);
164 }
165 }
166
167 void error(String msg) {
168 System.out.println("error: " + msg);
169 errors++;
170 }
171 }