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

 /*

  * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.

  *

  * This code is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

  * or visit www.oracle.com if you need additional information or have any

  * questions.

  */

 /*

  * @test

  * @bug 7115052

  * @ignore 7120266

  * @summary Add parser support for method references

  */

 import com.sun.source.util.JavacTask;

 import java.net.URI;

 import java.util.Arrays;

 import javax.tools.Diagnostic;

 import javax.tools.JavaCompiler;

 import javax.tools.JavaFileObject;

 import javax.tools.SimpleJavaFileObject;

 import javax.tools.StandardJavaFileManager;

 import javax.tools.ToolProvider;

 public class MethodReferenceParserTest {

     static int checkCount = 0;

     enum ReferenceKind {

         METHOD_REF("#Q##Gm"),

         CONSTRUCTOR_REF("#Q##Gnew"),

         ERR_SUPER("#Q##Gsuper"),

         ERR_METH0("#Q##Gm()"),

         ERR_METH1("#Q##Gm(X)"),

         ERR_CONSTR0("#Q##Gnew()"),

         ERR_CONSTR1("#Q##Gnew(X)");

         String referenceTemplate;

         ReferenceKind(String referenceTemplate) {

             this.referenceTemplate = referenceTemplate;

         }

         String getReferenceString(QualifierKind qk, GenericKind gk) {

             return referenceTemplate

                     .replaceAll("#Q", qk.qualifier)

                     .replaceAll("#G", gk.typeParameters);

         }

         boolean erroneous() {

             switch (this) {

                 case ERR_SUPER:

                 case ERR_METH0:

                 case ERR_METH1:

                 case ERR_CONSTR0:

                 case ERR_CONSTR1:

                     return true;

                 default: return false;

             }

         }

     }

     enum GenericKind {

         NONE(""),

         ONE("<X>"),

         TWO("<X,Y>");

         String typeParameters;

         GenericKind(String typeParameters) {

             this.typeParameters = typeParameters;

         }

     }

     enum QualifierKind {

         THIS("this"),

         SUPER("super"),

         NEW("new Foo()"),

         METHOD("m()"),

         FIELD("a.f"),

         UBOUND_SIMPLE("A"),

         UNBOUND_GENERIC1("A<X>"),

         UNBOUND_GENERIC2("A<X, Y>"),

         UNBOUND_GENERIC3("A<? extends X, ? super Y>");

         String qualifier;

         QualifierKind(String qualifier) {

             this.qualifier = qualifier;

         }

     }

     enum ExprKind {

         NONE("#R#S"),

         SINGLE_PAREN1("(#R#S)"),

         SINGLE_PAREN2("(#R)#S"),

         DOUBLE_PAREN1("((#R#S))"),

         DOUBLE_PAREN2("((#R)#S)"),

         DOUBLE_PAREN3("((#R))#S");

         String expressionTemplate;

         ExprKind(String expressionTemplate) {

             this.expressionTemplate = expressionTemplate;

         }

         String expressionString(ReferenceKind rk, QualifierKind qk, GenericKind gk, SubExprKind sk) {

             return expressionTemplate

                     .replaceAll("#R", rk.getReferenceString(qk, gk))

                     .replaceAll("#S", sk.subExpression);

         }

     }

     enum SubExprKind {

         NONE(""),

         SELECT_FIELD(".f"),

         SELECT_METHOD(".f()"),

         SELECT_NEW(".new Foo()"),

         POSTINC("++"),

         POSTDEC("--");

         String subExpression;

         SubExprKind(String subExpression) {

             this.subExpression = subExpression;

         }

     }

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

         //create default shared JavaCompiler - reused across multiple compilations

         JavaCompiler comp = ToolProvider.getSystemJavaCompiler();

         StandardJavaFileManager fm = comp.getStandardFileManager(null, null, null);

         for (ReferenceKind rk : ReferenceKind.values()) {

             for (QualifierKind qk : QualifierKind.values()) {

                 for (GenericKind gk : GenericKind.values()) {

                     for (SubExprKind sk : SubExprKind.values()) {

                         for (ExprKind ek : ExprKind.values()) {

                             new MethodReferenceParserTest(rk, qk, gk, sk, ek).run(comp, fm);

                         }

                     }

                 }

             }

         }

         System.out.println("Total check executed: " + checkCount);

     }

     ReferenceKind rk;

     QualifierKind qk;

     GenericKind gk;

     SubExprKind sk;

     ExprKind ek;

     JavaSource source;

     DiagnosticChecker diagChecker;

     MethodReferenceParserTest(ReferenceKind rk, QualifierKind qk, GenericKind gk, SubExprKind sk, ExprKind ek) {

         this.rk = rk;

         this.qk = qk;

         this.gk = gk;

         this.sk = sk;

         this.ek = ek;

         this.source = new JavaSource();

         this.diagChecker = new DiagnosticChecker();

     }

     class JavaSource extends SimpleJavaFileObject {

         String template = "class Test {\n" +

                           "   SAM s = #E;\n" +

                           "}";

         String source;

         public JavaSource() {

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

             source = template.replaceAll("#E", ek.expressionString(rk, qk, gk, sk));

         }

         @Override

         public CharSequence getCharContent(boolean ignoreEncodingErrors) {

             return source;

         }

     }

     void run(JavaCompiler tool, StandardJavaFileManager fm) throws Exception {

         JavacTask ct = (JavacTask)tool.getTask(null, fm, diagChecker,

                 Arrays.asList("-XDallowMethodReferences"), null, Arrays.asList(source));

         try {

             ct.parse();

         } catch (Throwable ex) {

             throw new AssertionError("Error thrown when parsing the following source:\n" + source.getCharContent(true));

         }

         check();

     }

     void check() {

         checkCount++;

         if (diagChecker.errorFound != rk.erroneous()) {

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

                 source.getCharContent(true) +

                 "\nFound error: " + diagChecker.errorFound +

                 "\nExpected error: " + rk.erroneous());

         }

     }

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

         boolean errorFound;

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

             if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {

                 errorFound = true;

             }

         }

     }

 }