aoqi@0: /*
aoqi@0:  * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: /*
aoqi@0:  * @test
aoqi@0:  * @bug 8003280
aoqi@0:  * @summary Add lambda tests
aoqi@0:  *  Check that self/forward references from lambda expressions behave
aoqi@0:  *          consistently w.r.t. local inner classes
aoqi@0:  */
aoqi@0: 
aoqi@0: import java.net.URI;
aoqi@0: import java.util.Arrays;
aoqi@0: import javax.tools.Diagnostic;
aoqi@0: import javax.tools.JavaCompiler;
aoqi@0: import javax.tools.JavaFileObject;
aoqi@0: import javax.tools.SimpleJavaFileObject;
aoqi@0: import javax.tools.StandardJavaFileManager;
aoqi@0: import javax.tools.ToolProvider;
aoqi@0: import com.sun.source.util.JavacTask;
aoqi@0: 
aoqi@0: public class TestSelfRef {
aoqi@0: 
aoqi@0:     static int checkCount = 0;
aoqi@0: 
aoqi@0:     enum RefKind {
aoqi@0:         SELF_LAMBDA("SAM s = x->{ System.out.println(s); };", true, false),
aoqi@0:         FORWARD_LAMBDA("SAM s = x->{ System.out.println(f); };\nObject f = null;", false, true),
aoqi@0:         SELF_ANON("Object s = new Object() { void test() { System.out.println(s); } };", true, false),
aoqi@0:         FORWARD_ANON("Object s = new Object() { void test() { System.out.println(f); } }; Object f = null;", false, true);
aoqi@0: 
aoqi@0:         String refStr;
aoqi@0:         boolean selfRef;
aoqi@0:         boolean forwardRef;
aoqi@0: 
aoqi@0:         private RefKind(String refStr, boolean selfRef, boolean forwardRef) {
aoqi@0:             this.refStr = refStr;
aoqi@0:             this.selfRef = selfRef;
aoqi@0:             this.forwardRef = forwardRef;
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     enum EnclosingKind {
aoqi@0:         TOPLEVEL("class C { #S }"),
aoqi@0:         MEMBER_INNER("class Outer { class C { #S } }"),
aoqi@0:         NESTED_INNER("class Outer { static class C { #S } }");
aoqi@0: 
aoqi@0:         String enclStr;
aoqi@0: 
aoqi@0:         private EnclosingKind(String enclStr) {
aoqi@0:             this.enclStr = enclStr;
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     enum InnerKind {
aoqi@0:         NONE("#R"),
aoqi@0:         LOCAL_NONE("class Local { #R }"),
aoqi@0:         LOCAL_MTH("class Local { void test() { #R } }"),
aoqi@0:         ANON_NONE("new Object() { #R };"),
aoqi@0:         ANON_MTH("new Object() { void test() { #R } };");
aoqi@0: 
aoqi@0:         String innerStr;
aoqi@0: 
aoqi@0:         private InnerKind(String innerStr) {
aoqi@0:             this.innerStr = innerStr;
aoqi@0:         }
aoqi@0: 
aoqi@0:         boolean inMethodContext(SiteKind sk) {
aoqi@0:             switch (this) {
aoqi@0:                 case LOCAL_MTH:
aoqi@0:                 case ANON_MTH: return true;
aoqi@0:                 case NONE: return sk != SiteKind.NONE;
aoqi@0:                 default:
aoqi@0:                     return false;
aoqi@0:             }
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     enum SiteKind {
aoqi@0:         NONE("#I"),
aoqi@0:         STATIC_INIT("static { #I }"),
aoqi@0:         INSTANCE_INIT("{ #I }"),
aoqi@0:         CONSTRUCTOR("C() { #I }"),
aoqi@0:         METHOD("void test() { #I }");
aoqi@0: 
aoqi@0:         String siteStr;
aoqi@0: 
aoqi@0:         private SiteKind(String siteStr) {
aoqi@0:             this.siteStr = siteStr;
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     public static void main(String... args) throws Exception {
aoqi@0: 
aoqi@0:         //create default shared JavaCompiler - reused across multiple compilations
aoqi@0:         JavaCompiler comp = ToolProvider.getSystemJavaCompiler();
aoqi@0:         StandardJavaFileManager fm = comp.getStandardFileManager(null, null, null);
aoqi@0: 
aoqi@0:         for (EnclosingKind ek : EnclosingKind.values()) {
aoqi@0:             for (SiteKind sk : SiteKind.values()) {
aoqi@0:                 if (sk == SiteKind.STATIC_INIT && ek == EnclosingKind.MEMBER_INNER)
aoqi@0:                     continue;
aoqi@0:                 for (InnerKind ik : InnerKind.values()) {
aoqi@0:                     if (ik != InnerKind.NONE && sk == SiteKind.NONE)
aoqi@0:                         break;
aoqi@0:                     for (RefKind rk : RefKind.values()) {
aoqi@0:                         new TestSelfRef(ek, sk, ik, rk).run(comp, fm);
aoqi@0:                     }
aoqi@0:                 }
aoqi@0:             }
aoqi@0:         }
aoqi@0:         System.out.println("Total check executed: " + checkCount);
aoqi@0:     }
aoqi@0: 
aoqi@0:     EnclosingKind ek;
aoqi@0:     SiteKind sk;
aoqi@0:     InnerKind ik;
aoqi@0:     RefKind rk;
aoqi@0:     JavaSource source;
aoqi@0:     DiagnosticChecker diagChecker;
aoqi@0: 
aoqi@0:     TestSelfRef(EnclosingKind ek, SiteKind sk, InnerKind ik, RefKind rk) {
aoqi@0:         this.ek = ek;
aoqi@0:         this.sk = sk;
aoqi@0:         this.ik = ik;
aoqi@0:         this.rk = rk;
aoqi@0:         this.source = new JavaSource();
aoqi@0:         this.diagChecker = new DiagnosticChecker();
aoqi@0:     }
aoqi@0: 
aoqi@0:     class JavaSource extends SimpleJavaFileObject {
aoqi@0: 
aoqi@0:         String bodyTemplate = "interface SAM { void test(Object o); }\n#B";
aoqi@0:         String source;
aoqi@0: 
aoqi@0:         public JavaSource() {
aoqi@0:             super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
aoqi@0:             source = bodyTemplate.replace("#B",
aoqi@0:                     ek.enclStr.replace("#S", sk.siteStr.replace("#I", ik.innerStr.replace("#R", rk.refStr))));
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public CharSequence getCharContent(boolean ignoreEncodingErrors) {
aoqi@0:             return source;
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     void run(JavaCompiler tool, StandardJavaFileManager fm) throws Exception {
aoqi@0:         JavacTask ct = (JavacTask)tool.getTask(null, fm, diagChecker,
aoqi@0:                 null, null, Arrays.asList(source));
aoqi@0:         try {
aoqi@0:             ct.analyze();
aoqi@0:         } catch (Throwable ex) {
aoqi@0:             throw new AssertionError("Error thron when compiling the following code:\n" + source.getCharContent(true));
aoqi@0:         }
aoqi@0:         check();
aoqi@0:     }
aoqi@0: 
aoqi@0:     boolean isErrorExpected() {
aoqi@0:         //illegal forward ref
aoqi@0:         boolean result = ik.inMethodContext(sk) && (rk.selfRef || rk.forwardRef);
aoqi@0:         result |= (rk == RefKind.SELF_LAMBDA || rk == RefKind.FORWARD_LAMBDA);
aoqi@0:         return result;
aoqi@0:     }
aoqi@0: 
aoqi@0:     void check() {
aoqi@0:         checkCount++;
aoqi@0:         boolean errorExpected = isErrorExpected();
aoqi@0:         if (diagChecker.errorFound != errorExpected) {
aoqi@0:             throw new Error("invalid diagnostics for source:\n" +
aoqi@0:                 source.getCharContent(true) +
aoqi@0:                 "\nFound error: " + diagChecker.errorFound +
aoqi@0:                 "\nExpected error: " + errorExpected);
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     static class DiagnosticChecker implements javax.tools.DiagnosticListener<JavaFileObject> {
aoqi@0: 
aoqi@0:         boolean errorFound;
aoqi@0: 
aoqi@0:         public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
aoqi@0:             if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {
aoqi@0:                 errorFound = true;
aoqi@0:             }
aoqi@0:         }
aoqi@0:     }
aoqi@0: }