1/* 2 * Copyright (c) 2012, 2016, 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 * @modules jdk.compiler 31 */ 32 33import java.io.*; 34import java.nio.*; 35import java.util.*; 36import java.util.regex.*; 37 38public class ClassVersionChecker { 39 40 int errors; 41 String[] jdk = {"", "1.6", "1.7", "1.8", "1.9"}; 42 File javaFile = null; 43 44 public static void main(String[] args) throws Throwable { 45 new ClassVersionChecker().run(); 46 } 47 48 void run() throws Exception { 49 writeTestFile(); 50 /* Rules applicable for -source and -target combinations 51 * 1. If both empty, version num is for the current release 52 * 2. If source is not empty and target is empty, version is based on source 53 * 3. If both non-empty, version is based on target 54 */ 55 56 /* -source (0=>empty,1=>1.2,...) X -target (0=>empty,1=>1.2,...) 57 * ver[0][0] => no -source or -target was given 58 * -1 => invalid combinations 59 */ 60 int[][] ver = 61 {{53, -1, -1, -1, -1}, 62 {53, 50, 51, 52, 53}, 63 {53, -1, 51, 52, 53}, 64 {53, -1, -1, 52, 53}}; 65 66 // Loop to run all possible combinations of source/target values 67 for (int i = 0; i< ver.length; i++) { 68 for (int j = 0 ; j< ver[i].length; j++) { 69 if(ver[i][j] != -1) { 70 logMsg("Index values for i = " + i + " j = " + j); 71 logMsg("Running for src = " + jdk[i] + " target = "+jdk[j] +" expected = " + ver[i][j]); 72 test(i,j, ver[i][j]); 73 } 74 } 75 } 76 77 if (errors > 0) 78 throw new Exception(errors + " errors found"); 79 } 80 81 void test (int i, int j, int expected) { 82 File classFile = compileTestFile(i, j, javaFile); 83 short majorVer = getMajorVersion(classFile); 84 checkVersion(majorVer, expected); 85 } 86 87 void writeTestFile() throws IOException { 88 javaFile = new File("Test.java"); 89 try(PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(javaFile)));) { 90 out.println("class Test { "); 91 out.println(" public void foo() { }"); 92 out.println("}"); 93 } catch (IOException ioe) { 94 error("IOException while creating Test.java" + ioe); 95 } 96 } 97 98 File compileTestFile(int i , int j, File f) { 99 int rc = -1; 100 // Src and target are empty 101 if (i == 0 && j == 0 ) { 102 rc = compile("-g", f.getPath()); 103 } else if( j == 0 ) { // target is empty 104 rc = compile("-source", jdk[i], "-g", f.getPath()); 105 } else { 106 rc = compile("-source", jdk[i], "-target", jdk[j], "-g", f.getPath()); 107 } 108 if (rc != 0) 109 throw new Error("compilation failed. rc=" + rc); 110 String path = f.getPath(); 111 return new File(path.substring(0, path.length() - 5) + ".class"); 112 } 113 114 int compile(String... args) { 115 return com.sun.tools.javac.Main.compile(args); 116 } 117 118 void logMsg (String str) { 119 System.out.println(str); 120 } 121 122 short getMajorVersion(File f) { 123 List<String> args = new ArrayList<String>(); 124 short majorVer = 0; 125 try(DataInputStream in = new DataInputStream(new BufferedInputStream(new FileInputStream(f)));) { 126 in.readInt(); 127 in.readShort(); 128 majorVer = in.readShort(); 129 System.out.println("major version:" + majorVer); 130 } catch (IOException e) { 131 error("IOException while reading Test.class" + e); 132 } 133 return majorVer; 134 } 135 136 void checkVersion(short majorVer, int expected) { 137 if (majorVer != expected ) { 138 error("versions did not match, Expected: " + expected + "Got: " + majorVer); 139 } 140 } 141 142 void error(String msg) { 143 System.out.println("error: " + msg); 144 errors++; 145 } 146} 147