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

 /*

  * Copyright (c) 2012, 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 8003280

  * @summary Add lambda tests

  *  Check that self/forward references from lambda expressions behave

  *          consistently w.r.t. local inner classes

  */

 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 TestSelfRef {

     static int checkCount = 0;

     enum RefKind {

         SELF_LAMBDA("SAM s = x->{ System.out.println(s); };", true, false),

         FORWARD_LAMBDA("SAM s = x->{ System.out.println(f); };\nObject f = null;", false, true),

         SELF_ANON("Object s = new Object() { void test() { System.out.println(s); } };", true, false),

         FORWARD_ANON("Object s = new Object() { void test() { System.out.println(f); } }; Object f = null;", false, true);

         String refStr;

         boolean selfRef;

         boolean forwardRef;

         private RefKind(String refStr, boolean selfRef, boolean forwardRef) {

             this.refStr = refStr;

             this.selfRef = selfRef;

             this.forwardRef = forwardRef;

         }

     }

     enum EnclosingKind {

         TOPLEVEL("class C { #S }"),

         MEMBER_INNER("class Outer { class C { #S } }"),

         NESTED_INNER("class Outer { static class C { #S } }");

         String enclStr;

         private EnclosingKind(String enclStr) {

             this.enclStr = enclStr;

         }

     }

     enum InnerKind {

         NONE("#R"),

         LOCAL_NONE("class Local { #R }"),

         LOCAL_MTH("class Local { void test() { #R } }"),

         ANON_NONE("new Object() { #R };"),

         ANON_MTH("new Object() { void test() { #R } };");

         String innerStr;

         private InnerKind(String innerStr) {

             this.innerStr = innerStr;

         }

         boolean inMethodContext(SiteKind sk) {

             switch (this) {

                 case LOCAL_MTH:

                 case ANON_MTH: return true;

                 case NONE: return sk != SiteKind.NONE;

                 default:

                     return false;

             }

         }

     }

     enum SiteKind {

         NONE("#I"),

         STATIC_INIT("static { #I }"),

         INSTANCE_INIT("{ #I }"),

         CONSTRUCTOR("C() { #I }"),

         METHOD("void test() { #I }");

         String siteStr;

         private SiteKind(String siteStr) {

             this.siteStr = siteStr;

         }

     }

     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 (EnclosingKind ek : EnclosingKind.values()) {

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

                 if (sk == SiteKind.STATIC_INIT && ek == EnclosingKind.MEMBER_INNER)

                     continue;

                 for (InnerKind ik : InnerKind.values()) {

                     if (ik != InnerKind.NONE && sk == SiteKind.NONE)

                         break;

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

                         new TestSelfRef(ek, sk, ik, rk).run(comp, fm);

                     }

                 }

             }

         }

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

     }

     EnclosingKind ek;

     SiteKind sk;

     InnerKind ik;

     RefKind rk;

     JavaSource source;

     DiagnosticChecker diagChecker;

     TestSelfRef(EnclosingKind ek, SiteKind sk, InnerKind ik, RefKind rk) {

         this.ek = ek;

         this.sk = sk;

         this.ik = ik;

         this.rk = rk;

         this.source = new JavaSource();

         this.diagChecker = new DiagnosticChecker();

     }

     class JavaSource extends SimpleJavaFileObject {

         String bodyTemplate = "interface SAM { void test(Object o); }\n#B";

         String source;

         public JavaSource() {

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

             source = bodyTemplate.replace("#B",

                     ek.enclStr.replace("#S", sk.siteStr.replace("#I", ik.innerStr.replace("#R", rk.refStr))));

         }

         @Override

         public CharSequence getCharContent(boolean ignoreEncodingErrors) {

             return source;

         }

     }

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

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

                 null, null, Arrays.asList(source));

         try {

             ct.analyze();

         } catch (Throwable ex) {

             throw new AssertionError("Error thron when compiling the following code:\n" + source.getCharContent(true));

         }

         check();

     }

     void check() {

         //illegal forward ref

         boolean errorExpected = ik.inMethodContext(sk) &&

                 (rk.selfRef || rk.forwardRef);

         if (diagChecker.errorFound != errorExpected) {

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

                 source.getCharContent(true) +

                 "\nFound error: " + diagChecker.errorFound +

                 "\nExpected error: " + errorExpected);

         }

     }

     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;

             }

         }

     }

 }