jdk8-mips64-public/langtools: test/tools/javac/varargs/warning/Warn4.java@7b99f98b3035

6993978: Project Coin: Compiler support of annotation to reduce varargs warnings
Reviewed-by: jjg, darcy

     1 /*

     2  * Copyright (c) 2010, 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  */

    24 /**

    25  * @test

    26  * @bug     6945418 6993978

    27  * @summary Project Coin: Simplified Varargs Method Invocation

    28  * @author  mcimadamore

    29  * @run main Warn4

    30  */

    31 import com.sun.source.util.JavacTask;

    32 import java.net.URI;

    33 import java.util.Arrays;

    34 import java.util.Set;

    35 import java.util.HashSet;

    36 import javax.tools.Diagnostic;

    37 import javax.tools.JavaCompiler;

    38 import javax.tools.JavaFileObject;

    39 import javax.tools.SimpleJavaFileObject;

    40 import javax.tools.ToolProvider;

    42 public class Warn4 {

    44     final static Warning[] error = null;

    45     final static Warning[] none = new Warning[] {};

    46     final static Warning[] vararg = new Warning[] { Warning.VARARGS };

    47     final static Warning[] unchecked = new Warning[] { Warning.UNCHECKED };

    48     final static Warning[] both = new Warning[] { Warning.VARARGS, Warning.UNCHECKED };

    50     enum Warning {

    51         UNCHECKED("generic.array.creation"),

    52         VARARGS("varargs.non.reifiable.type");

    54         String key;

    56         Warning(String key) {

    57             this.key = key;

    58         }

    60         boolean isSuppressed(TrustMe trustMe, SourceLevel source, SuppressLevel suppressLevelClient,

    61                 SuppressLevel suppressLevelDecl, ModifierKind modKind) {

    62             switch(this) {

    63                 case VARARGS:

    64                     return source == SourceLevel.JDK_6 ||

    65                             suppressLevelDecl == SuppressLevel.UNCHECKED ||

    66                             trustMe == TrustMe.TRUST;

    67                 case UNCHECKED:

    68                     return suppressLevelClient == SuppressLevel.UNCHECKED ||

    69                         (trustMe == TrustMe.TRUST && modKind != ModifierKind.NONE && source == SourceLevel.JDK_7);

    70             }

    72             SuppressLevel supLev = this == VARARGS ?

    73                 suppressLevelDecl :

    74                 suppressLevelClient;

    75             return supLev == SuppressLevel.UNCHECKED ||

    76                     (trustMe == TrustMe.TRUST && modKind != ModifierKind.NONE);

    77         }

    78     }

    80     enum SourceLevel {

    81         JDK_6("6"),

    82         JDK_7("7");

    84         String sourceKey;

    86         SourceLevel(String sourceKey) {

    87             this.sourceKey = sourceKey;

    88         }

    89     }

    91     enum TrustMe {

    92         DONT_TRUST(""),

    93         TRUST("@java.lang.SafeVarargs");

    95         String anno;

    97         TrustMe(String anno) {

    98             this.anno = anno;

    99         }

   100     }

   102     enum ModifierKind {

   103         NONE(" "),

   104         FINAL("final "),

   105         STATIC("static ");

   107         String mod;

   109         ModifierKind(String mod) {

   110             this.mod = mod;

   111         }

   112     }

   114     enum SuppressLevel {

   115         NONE(""),

   116         UNCHECKED("unchecked");

   118         String lint;

   120         SuppressLevel(String lint) {

   121             this.lint = lint;

   122         }

   124         String getSuppressAnno() {

   125             return "@SuppressWarnings(\"" + lint + "\")";

   126         }

   127     }

   129     enum Signature {

   130         UNBOUND("void #name(List<?>#arity arg) { #body }",

   131             new Warning[][] {none, none, none, none, error}),

   132         INVARIANT_TVAR("<Z> void #name(List<Z>#arity arg) { #body }",

   133             new Warning[][] {both, both, error, both, error}),

   134         TVAR("<Z> void #name(Z#arity arg) { #body }",

   135             new Warning[][] {both, both, both, both, vararg}),

   136         INVARIANT("void #name(List<String>#arity arg) { #body }",

   137             new Warning[][] {error, error, error, both, error}),

   138         UNPARAMETERIZED("void #name(String#arity arg) { #body }",

   139             new Warning[][] {error, error, error, error, none});

   141         String template;

   142         Warning[][] warnings;

   144         Signature(String template, Warning[][] warnings) {

   145             this.template = template;

   146             this.warnings = warnings;

   147         }

   149         boolean isApplicableTo(Signature other) {

   150             return warnings[other.ordinal()] != null;

   151         }

   153         boolean giveUnchecked(Signature other) {

   154             return warnings[other.ordinal()] == unchecked ||

   155                     warnings[other.ordinal()] == both;

   156         }

   158         boolean giveVarargs(Signature other) {

   159             return warnings[other.ordinal()] == vararg ||

   160                     warnings[other.ordinal()] == both;

   161         }

   162     }

   164     public static void main(String... args) throws Exception {

   165         for (SourceLevel sourceLevel : SourceLevel.values()) {

   166             for (TrustMe trustMe : TrustMe.values()) {

   167                 for (SuppressLevel suppressLevelClient : SuppressLevel.values()) {

   168                     for (SuppressLevel suppressLevelDecl : SuppressLevel.values()) {

   169                         for (ModifierKind modKind : ModifierKind.values()) {

   170                             for (Signature vararg_meth : Signature.values()) {

   171                                 for (Signature client_meth : Signature.values()) {

   172                                     if (vararg_meth.isApplicableTo(client_meth)) {

   173                                         test(sourceLevel,

   174                                                 trustMe,

   175                                                 suppressLevelClient,

   176                                                 suppressLevelDecl,

   177                                                 modKind,

   178                                                 vararg_meth,

   179                                                 client_meth);

   180                                     }

   181                                 }

   182                             }

   183                         }

   184                     }

   185                 }

   186             }

   187         }

   188     }

   190     static void test(SourceLevel sourceLevel, TrustMe trustMe, SuppressLevel suppressLevelClient,

   191             SuppressLevel suppressLevelDecl, ModifierKind modKind, Signature vararg_meth, Signature client_meth) throws Exception {

   192         final JavaCompiler tool = ToolProvider.getSystemJavaCompiler();

   193         JavaSource source = new JavaSource(trustMe, suppressLevelClient, suppressLevelDecl, modKind, vararg_meth, client_meth);

   194         DiagnosticChecker dc = new DiagnosticChecker();

   195         JavacTask ct = (JavacTask)tool.getTask(null, null, dc,

   196                 Arrays.asList("-Xlint:unchecked", "-source", sourceLevel.sourceKey),

   197                 null, Arrays.asList(source));

   198         ct.generate(); //to get mandatory notes

   199         check(dc.warnings, sourceLevel,

   200                 new boolean[] {vararg_meth.giveUnchecked(client_meth),

   201                                vararg_meth.giveVarargs(client_meth)},

   202                 source, trustMe, suppressLevelClient, suppressLevelDecl, modKind);

   203     }

   205     static void check(Set<Warning> warnings, SourceLevel sourceLevel, boolean[] warnArr, JavaSource source,

   206             TrustMe trustMe, SuppressLevel suppressLevelClient, SuppressLevel suppressLevelDecl, ModifierKind modKind) {

   207         boolean badOutput = false;

   208         for (Warning wkind : Warning.values()) {

   209             boolean isSuppressed = wkind.isSuppressed(trustMe, sourceLevel,

   210                     suppressLevelClient, suppressLevelDecl, modKind);

   211             System.out.println("SUPPRESSED = " + isSuppressed);

   212             badOutput |= (warnArr[wkind.ordinal()] && !isSuppressed) != warnings.contains(wkind);

   213         }

   214         if (badOutput) {

   215             throw new Error("invalid diagnostics for source:\n" +

   216                     source.getCharContent(true) +

   217                     "\nExpected unchecked warning: " + warnArr[0] +

   218                     "\nExpected unsafe vararg warning: " + warnArr[1] +

   219                     "\nWarnings: " + warnings +

   220                     "\nSource level: " + sourceLevel);

   221         }

   222     }

   224     static class JavaSource extends SimpleJavaFileObject {

   226         String source;

   228         public JavaSource(TrustMe trustMe, SuppressLevel suppressLevelClient, SuppressLevel suppressLevelDecl,

   229                 ModifierKind modKind, Signature vararg_meth, Signature client_meth) {

   230             super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);

   231             String meth1 = vararg_meth.template.replace("#arity", "...");

   232             meth1 = meth1.replace("#name", "m");

   233             meth1 = meth1.replace("#body", "");

   234             meth1 = trustMe.anno + "\n" + suppressLevelDecl.getSuppressAnno() + modKind.mod + meth1;

   235             String meth2 = client_meth.template.replace("#arity", "");

   236             meth2 = meth2.replace("#name", "test");

   237             meth2 = meth2.replace("#body", "m(arg);");

   238             meth2 = suppressLevelClient.getSuppressAnno() + meth2;

   239             source = "import java.util.List;\n" +

   240                      "class Test {\n" + meth1 +

   241                      "\n" + meth2 + "\n}\n";

   242         }

   244         @Override

   245         public CharSequence getCharContent(boolean ignoreEncodingErrors) {

   246             return source;

   247         }

   248     }

   250     static class DiagnosticChecker implements javax.tools.DiagnosticListener<JavaFileObject> {

   252         Set<Warning> warnings = new HashSet<>();

   254         public void report(Diagnostic<? extends JavaFileObject> diagnostic) {

   255             if (diagnostic.getKind() == Diagnostic.Kind.MANDATORY_WARNING ||

   256                     diagnostic.getKind() == Diagnostic.Kind.WARNING) {

   257                 if (diagnostic.getCode().contains(Warning.VARARGS.key)) {

   258                     warnings.add(Warning.VARARGS);

   259                 } else if(diagnostic.getCode().contains(Warning.UNCHECKED.key)) {

   260                     warnings.add(Warning.UNCHECKED);

   261                 }

   262             }

   263         }

   264     }

   265 }

Mercurial > jdk8-mips64-public > langtools / file revision

test/tools/javac/varargs/warning/Warn4.java@7b99f98b3035

test/tools/javac/varargs/warning/Warn4.java