jdk8-mips64-public/langtools: test/tools/javac/T8011181/EmptyUTF8ForInnerClassNameTest.java@7909abb85562

     1 /*

     2  * Copyright (c) 2013, 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  */

    26 /*

    27  * @test

    28  * @bug 8011181

    29  * @summary javac, empty UTF8 entry generated for inner class

    30  */

    32 import java.io.BufferedInputStream;

    33 import java.nio.file.Files;

    34 import java.nio.file.Path;

    35 import java.nio.file.Paths;

    37 import com.sun.tools.javac.util.Assert;

    38 import com.sun.tools.classfile.ClassFile;

    40 import static com.sun.tools.classfile.ConstantPool.CONSTANT_Utf8;

    41 import static com.sun.tools.classfile.ConstantPool.CONSTANT_Utf8_info;

    42 import static com.sun.tools.classfile.ConstantPool.CPInfo;

    44 public class EmptyUTF8ForInnerClassNameTest {

    46     public static void main(String[] args) throws Exception {

    47         new EmptyUTF8ForInnerClassNameTest().run();

    48     }

    50     void run() throws Exception {

    51         checkClassFile(Paths.get(System.getProperty("test.classes"),

    52                 this.getClass().getName() + "$1.class"));

    53         checkClassFile(Paths.get(System.getProperty("test.classes"),

    54                 this.getClass().getName() + "$EnumPlusSwitch.class"));

    55     }

    57     void checkClassFile(final Path path) throws Exception {

    58         ClassFile classFile = ClassFile.read(

    59                 new BufferedInputStream(Files.newInputStream(path)));

    60         for (CPInfo cpInfo : classFile.constant_pool.entries()) {

    61             if (cpInfo.getTag() == CONSTANT_Utf8) {

    62                 CONSTANT_Utf8_info utf8Info = (CONSTANT_Utf8_info)cpInfo;

    63                 Assert.check(utf8Info.value.length() > 0,

    64                         "UTF8 with length 0 found at class " + classFile.getName());

    65             }

    66         }

    67     }

    69     static class EnumPlusSwitch {

    70         enum E {E1}

    72         public int m (E e) {

    73             switch (e) {

    74                 case E1:

    75                     return 0;

    76             }

    77             return -1;

    78         }

    79     }

    81 }

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