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.
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
27 * @summary Test major version for all legal combinations for -source and -target
28 * @author sgoel
29 *
30 */
31
32 import java.io.*;
33 import java.nio.*;
34 import java.util.*;
35 import java.util.regex.*;
36
37 public class ClassVersionChecker {
38
39 int errors;
40 String[] jdk = {"","1.6","1.7","1.8"};
41 File javaFile = null;
42
43 public static void main(String[] args) throws Throwable {
44 new ClassVersionChecker().run();
45 }
46
47 void run() throws Exception {
48 writeTestFile();
49 /* Rules applicable for -source and -target combinations
50 * 1. If both empty, version num is for the current release
51 * 2. If source is not empty and target is empty, version is based on source
52 * 3. If both non-empty, version is based on target
53 */
54
55 /* -source (0=>empty,1=>1.2,...) X -target (0=>empty,1=>1.2,...)
56 * ver[0][0] => no -source or -target was given
57 * -1 => invalid combinations
58 */
59 int[][] ver =
60 {{52, -1, -1, -1},
61 {52, 50, 51, 52},
62 {52, -1, 51, 52},
63 {52, -1, -1, 52}};
64
65 // Loop to run all possible combinations of source/target values
66 for (int i = 0; i< ver.length; i++) {
67 for (int j = 0 ; j< ver[i].length; j++) {
68 if(ver[i][j] != -1) {
69 logMsg("Index values for i = " + i + " j = " + j);
70 logMsg("Running for src = " + jdk[i] + " target = "+jdk[j] +" expected = " + ver[i][j]);
71 test(i,j, ver[i][j]);
72 }
73 }
74 }
75
76 if (errors > 0)
77 throw new Exception(errors + " errors found");
78 }
79
80 void test (int i, int j, int expected) {
81 File classFile = compileTestFile(i, j, javaFile);
82 short majorVer = getMajorVersion(classFile);
83 checkVersion(majorVer, expected);
84 }
85
86 void writeTestFile() throws IOException {
87 javaFile = new File("Test.java");
88 try(PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(javaFile)));) {
89 out.println("class Test { ");
90 out.println(" public void foo() { }");
91 out.println("}");
92 } catch (IOException ioe) {
93 error("IOException while creating Test.java" + ioe);
94 }
95 }
96
97 File compileTestFile(int i , int j, File f) {
98 int rc = -1;
99 // Src and target are empty
100 if (i == 0 && j == 0 ) {
101 rc = compile("-g", f.getPath());
102 } else if( j == 0 ) { // target is empty
103 rc = compile("-source", jdk[i], "-g", f.getPath());
104 } else {
105 rc = compile("-source", jdk[i], "-target", jdk[j], "-g", f.getPath());
106 }
107 if (rc != 0)
108 throw new Error("compilation failed. rc=" + rc);
109 String path = f.getPath();
110 return new File(path.substring(0, path.length() - 5) + ".class");
111 }
112
113 int compile(String... args) {
114 return com.sun.tools.javac.Main.compile(args);
115 }
116
117 void logMsg (String str) {
118 System.out.println(str);
119 }
120
121 short getMajorVersion(File f) {
122 List<String> args = new ArrayList<String>();
123 short majorVer = 0;
124 try(DataInputStream in = new DataInputStream(new BufferedInputStream(new FileInputStream(f)));) {
125 in.readInt();
126 in.readShort();
127 majorVer = in.readShort();
128 System.out.println("major version:" + majorVer);
129 } catch (IOException e) {
130 error("IOException while reading Test.class" + e);
131 }
132 return majorVer;
133 }
134
135 void checkVersion(short majorVer, int expected) {
136 if (majorVer != expected ) {
137 error("versions did not match, Expected: " + expected + "Got: " + majorVer);
138 }
139 }
140
141 void error(String msg) {
142 System.out.println("error: " + msg);
143 errors++;
144 }
145 }