mcimadamore@1415: /*
mcimadamore@1415:  * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
mcimadamore@1415:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
mcimadamore@1415:  *
mcimadamore@1415:  * This code is free software; you can redistribute it and/or modify it
mcimadamore@1415:  * under the terms of the GNU General Public License version 2 only, as
mcimadamore@1415:  * published by the Free Software Foundation.
mcimadamore@1415:  *
mcimadamore@1415:  * This code is distributed in the hope that it will be useful, but WITHOUT
mcimadamore@1415:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
mcimadamore@1415:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
mcimadamore@1415:  * version 2 for more details (a copy is included in the LICENSE file that
mcimadamore@1415:  * accompanied this code).
mcimadamore@1415:  *
mcimadamore@1415:  * You should have received a copy of the GNU General Public License version
mcimadamore@1415:  * 2 along with this work; if not, write to the Free Software Foundation,
mcimadamore@1415:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
mcimadamore@1415:  *
mcimadamore@1415:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
mcimadamore@1415:  * or visit www.oracle.com if you need additional information or have any
mcimadamore@1415:  * questions.
mcimadamore@1415:  */
mcimadamore@1415: 
mcimadamore@1415: /**
mcimadamore@1415:  * @test
mcimadamore@1415:  * @bug 8003280
mcimadamore@1415:  * @summary Add lambda tests
mcimadamore@1415:  *   Test SAM conversion of lambda expressions in combinations of different contexts,
mcimadamore@1415:  *           lambda body types(statement/expression), explict/implicit target type etc, to verify
mcimadamore@1415:  *           SAM conversion being conducted successfully as expected.
mcimadamore@1415:  */
mcimadamore@1415: 
mcimadamore@1415: import com.sun.source.util.JavacTask;
mcimadamore@1415: import java.net.URI;
mcimadamore@1415: import java.util.Arrays;
mcimadamore@1415: import javax.tools.Diagnostic;
mcimadamore@1415: import javax.tools.JavaCompiler;
mcimadamore@1415: import javax.tools.JavaFileObject;
mcimadamore@1415: import javax.tools.SimpleJavaFileObject;
mcimadamore@1415: import javax.tools.ToolProvider;
mcimadamore@1415: 
mcimadamore@1415: public class SamConversionComboTest {
mcimadamore@1415: 
mcimadamore@1415:     enum FInterface {
mcimadamore@1415:         A("A", "interface A { Integer m(int i); }"),
mcimadamore@1415:         B("B", "interface B { int m(Integer i); }"),
mcimadamore@1415:         C("C", "interface C { int m(Integer i) throws Exception; }");
mcimadamore@1415: 
mcimadamore@1415:         String interfaceType;
mcimadamore@1415:         String interfaceDef;
mcimadamore@1415: 
mcimadamore@1415:         FInterface(String interfaceType, String interfaceDef) {
mcimadamore@1415:             this.interfaceType = interfaceType;
mcimadamore@1415:             this.interfaceDef = interfaceDef;
mcimadamore@1415:         }
mcimadamore@1415: 
mcimadamore@1415:         String getParameterType() {
mcimadamore@1415:             switch(this) {
mcimadamore@1415:             case A:
mcimadamore@1415:                 return "int";
mcimadamore@1415:             case B:
mcimadamore@1415:             case C:
mcimadamore@1415:                 return "Integer";
mcimadamore@1415:             default:
mcimadamore@1415:                 return null;
mcimadamore@1415:             }
mcimadamore@1415:         }
mcimadamore@1415:     }
mcimadamore@1415: 
mcimadamore@1415:     enum Context {
mcimadamore@1415:         ASSIGNMENT("#FType f = #LBody;"),
mcimadamore@1415:         METHOD_CALL("void method1(#FType f) { }\n" +
mcimadamore@1415:                     "    void method2() {\n" +
mcimadamore@1415:                     "        method1(#LBody);\n" +
mcimadamore@1415:                     "    }"),
mcimadamore@1415:         CONSTRUCTOR("X x = new X(#LBody);"),
mcimadamore@1415:         RETURN_OF_METHOD("#FType method1() {\n" +
mcimadamore@1415:                          "    return #LBody;\n" +
mcimadamore@1415:                          "}"),
mcimadamore@1415:         ARRAY_INITIALIZER("Object[] oarray = {\"a\", 1, (#FType)#LBody};"),
mcimadamore@1415:         LAMBDA_BODY("#FType f = n -> ((#FType)#LBody).m(n);"),
mcimadamore@1415:         CAST("void test() throws Exception { int n = ((#FType)#LBody).m(1); }"),
mcimadamore@1415:         CONDITIONAL_EXPRESSION("#FType f = 2 > 1 ? #LBody : null;");
mcimadamore@1415: 
mcimadamore@1415:         String context;
mcimadamore@1415: 
mcimadamore@1415:         Context(String context) {
mcimadamore@1415:             this.context = context;
mcimadamore@1415:         }
mcimadamore@1415: 
mcimadamore@1415:         String getContext(FInterface f, LambdaKind lk, LambdaBody lb, ReturnValue rv) {
mcimadamore@1415:             return context.replace("#FType", f.interfaceType).replace("#LBody", lb.getLambdaBody(f, lk, rv));
mcimadamore@1415:         }
mcimadamore@1415:     }
mcimadamore@1415: 
mcimadamore@1415:     enum LambdaKind {
mcimadamore@1415:         EXPRESSION("#VAL"),
mcimadamore@1415:         STATEMENT("{return #VAL;}"),
mcimadamore@1415:         EXCEPTION_STMT("{throw new Exception();}");
mcimadamore@1415: 
mcimadamore@1415:         String stmt;
mcimadamore@1415: 
mcimadamore@1415:         LambdaKind(String stmt) {
mcimadamore@1415:             this.stmt = stmt;
mcimadamore@1415:         }
mcimadamore@1415:     }
mcimadamore@1415: 
mcimadamore@1415:     enum ReturnValue {
mcimadamore@1415:         INT("i + 1"),
mcimadamore@1415:         INTEGER("new Integer(i+1)"),
mcimadamore@1415:         INT2("i.intValue() + 1"),
mcimadamore@1415:         STRING("i + \"\""),
mcimadamore@1415:         DOUBLE("i * 1.0");
mcimadamore@1415: 
mcimadamore@1415:         String rValue;
mcimadamore@1415: 
mcimadamore@1415:         ReturnValue(String rValue) {
mcimadamore@1415:             this.rValue = rValue;
mcimadamore@1415:         }
mcimadamore@1415:     }
mcimadamore@1415: 
mcimadamore@1415:     enum LambdaBody {
mcimadamore@1415:         IMPLICIT("i -> #RET"),//type inferred
mcimadamore@1415:         EXPLICIT("(#Type i) -> #RET");//explicit type
mcimadamore@1415: 
mcimadamore@1415:         String bodyStr;
mcimadamore@1415: 
mcimadamore@1415:         LambdaBody(String bodyStr) {
mcimadamore@1415:             this.bodyStr = bodyStr;
mcimadamore@1415:         }
mcimadamore@1415: 
mcimadamore@1415:         String getLambdaBody(FInterface fi, LambdaKind lk, ReturnValue rv) {
mcimadamore@1415:             return bodyStr.replace("#Type", fi.getParameterType()).replace("#RET", lk.stmt.replace("#VAL", rv.rValue));
mcimadamore@1415:         }
mcimadamore@1415:     }
mcimadamore@1415: 
mcimadamore@1415:     boolean checkSamConversion() {
mcimadamore@1415:         if(lambdaKind != LambdaKind.EXCEPTION_STMT && (returnValue == ReturnValue.DOUBLE || returnValue == ReturnValue.STRING)) //return type mismatch
mcimadamore@1415:             return false;
mcimadamore@1415:         if(context != Context.CONSTRUCTOR) {//context other than construcotr argument
mcimadamore@1415:             if(fInterface != FInterface.C && lambdaKind == LambdaKind.EXCEPTION_STMT)
mcimadamore@1415:                 return false;
mcimadamore@1415:             if(fInterface == FInterface.A && returnValue == ReturnValue.INT2)
mcimadamore@1415:                 return false;
mcimadamore@1415:         }
mcimadamore@1415:         else { //constructor argument context
mcimadamore@1415:             //match X(A a) or X(B b) or X(C c)
mcimadamore@1415:             if (lambdaKind == LambdaKind.EXCEPTION_STMT) {
mcimadamore@1415:                 return false; //ambiguous target type
mcimadamore@1415:             }
mcimadamore@1415:             else if(lambdaBody == LambdaBody.IMPLICIT) {
mcimadamore@1415:                 if(returnValue != ReturnValue.INTEGER) //ambiguous target type
mcimadamore@1415:                     return false;
mcimadamore@1415:             }
mcimadamore@1415:             else { //explicit parameter type
mcimadamore@1415:                 if(fInterface.getParameterType().equals("Integer")) //ambiguous target type
mcimadamore@1415:                 //e.g. X x = new X((Integer i) -> i + 1);
mcimadamore@1415:                     return false;
mcimadamore@1415:                 if(returnValue == ReturnValue.INT2)
mcimadamore@1415:                 //e.g. X x = new X(int i -> i.intValue() + 1);
mcimadamore@1415:                     return false;
mcimadamore@1415:             }
mcimadamore@1415:         }
mcimadamore@1415:         return true;
mcimadamore@1415:     }
mcimadamore@1415: 
mcimadamore@1415:     SourceFile samSourceFile = new SourceFile("FInterface.java", "#C") {
mcimadamore@1415:         public String toString() {
mcimadamore@1415:             String interfaces = "";
mcimadamore@1415:             for(FInterface fi : FInterface.values())
mcimadamore@1415:                 interfaces += fi.interfaceDef + "\n";
mcimadamore@1415:             return template.replace("#C", interfaces);
mcimadamore@1415:         }
mcimadamore@1415:     };
mcimadamore@1415: 
mcimadamore@1415:     String clientTemplate = "class Client {\n" +
mcimadamore@1415:                             "    #Context\n" +
mcimadamore@1415:                             "}\n\n" +
mcimadamore@1415: 
mcimadamore@1415:                             "class X {\n" +
mcimadamore@1415:                             "    int value = 0;\n\n" +
mcimadamore@1415: 
mcimadamore@1415:                             "    X(A a) {\n" +
mcimadamore@1415:                             "        value = a.m(6);\n" +
mcimadamore@1415:                             "    }\n\n" +
mcimadamore@1415: 
mcimadamore@1415:                             "    X(B b) {\n" +
mcimadamore@1415:                             "        value = b.m(7);\n" +
mcimadamore@1415:                             "    }\n\n" +
mcimadamore@1415: 
mcimadamore@1415:                             "    X(C c) {\n" +
mcimadamore@1415:                             "        try {\n" +
mcimadamore@1415:                             "            value = c.m(8);\n" +
mcimadamore@1415:                             "        } catch (Exception e){}\n" +
mcimadamore@1415:                             "    }\n" +
mcimadamore@1415:                             "}";
mcimadamore@1415:     SourceFile clientSourceFile = new SourceFile("Client.java", clientTemplate) {
mcimadamore@1415:         public String toString() {
mcimadamore@1415:             return template.replace("#Context", context.getContext(fInterface, lambdaKind, lambdaBody, returnValue));
mcimadamore@1415:         }
mcimadamore@1415:     };
mcimadamore@1415: 
mcimadamore@1415:     void test() throws Exception {
mcimadamore@1415:         System.out.println("\n====================================");
mcimadamore@1415:         System.out.println(fInterface + ", " +  context + ", " + lambdaKind + ", " + lambdaBody + ", " + returnValue);
mcimadamore@1415:         System.out.println(samSourceFile + "\n");
mcimadamore@1415:         String clientFileStr = clientSourceFile.toString();
mcimadamore@1415:         System.out.println(clientFileStr.substring(0, clientFileStr.indexOf("\n\n")));
mcimadamore@1415: 
mcimadamore@1415:         final JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
mcimadamore@1415:         DiagnosticChecker dc = new DiagnosticChecker();
mcimadamore@1415:         JavacTask ct = (JavacTask)tool.getTask(null, null, dc, null, null, Arrays.asList(samSourceFile, clientSourceFile));
mcimadamore@1415:         ct.analyze();
mcimadamore@1415:         if (dc.errorFound == checkSamConversion()) {
mcimadamore@1415:             throw new AssertionError(samSourceFile + "\n\n" + clientSourceFile);
mcimadamore@1415:         }
mcimadamore@1415:         count++;
mcimadamore@1415:     }
mcimadamore@1415: 
mcimadamore@1415:     abstract class SourceFile extends SimpleJavaFileObject {
mcimadamore@1415: 
mcimadamore@1415:         protected String template;
mcimadamore@1415: 
mcimadamore@1415:         public SourceFile(String filename, String template) {
mcimadamore@1415:             super(URI.create("myfo:/" + filename), JavaFileObject.Kind.SOURCE);
mcimadamore@1415:             this.template = template;
mcimadamore@1415:         }
mcimadamore@1415: 
mcimadamore@1415:         @Override
mcimadamore@1415:         public CharSequence getCharContent(boolean ignoreEncodingErrors) {
mcimadamore@1415:             return toString();
mcimadamore@1415:         }
mcimadamore@1415: 
mcimadamore@1415:         public abstract String toString();
mcimadamore@1415:     }
mcimadamore@1415: 
mcimadamore@1415:     static class DiagnosticChecker implements javax.tools.DiagnosticListener<JavaFileObject> {
mcimadamore@1415: 
mcimadamore@1415:         boolean errorFound = false;
mcimadamore@1415: 
mcimadamore@1415:         public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
mcimadamore@1415:             if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {
mcimadamore@1415:                 errorFound = true;
mcimadamore@1415:             }
mcimadamore@1415:         }
mcimadamore@1415:     }
mcimadamore@1415: 
mcimadamore@1415:     FInterface fInterface;
mcimadamore@1415:     Context context;
mcimadamore@1415:     LambdaBody lambdaBody;
mcimadamore@1415:     LambdaKind lambdaKind;
mcimadamore@1415:     ReturnValue returnValue;
mcimadamore@1415:     static int count = 0;
mcimadamore@1415: 
mcimadamore@1415:     SamConversionComboTest(FInterface f, Context c, LambdaBody lb, LambdaKind lk, ReturnValue rv) {
mcimadamore@1415:         fInterface = f;
mcimadamore@1415:         context = c;
mcimadamore@1415:         lambdaKind = lk;
mcimadamore@1415:         lambdaBody = lb;
mcimadamore@1415:         returnValue = rv;
mcimadamore@1415:     }
mcimadamore@1415: 
mcimadamore@1415:     public static void main(String[] args) throws Exception {
mcimadamore@1415:         for(Context ct : Context.values()) {
mcimadamore@1415:             for (FInterface fi : FInterface.values()) {
mcimadamore@1415:                 for (LambdaKind lk: LambdaKind.values()) {
mcimadamore@1415:                     for (LambdaBody lb : LambdaBody.values()) {
mcimadamore@1415:                         for(ReturnValue rv : ReturnValue.values()) {
mcimadamore@1415:                             new SamConversionComboTest(fi, ct, lb, lk, rv).test();
mcimadamore@1415:                         }
mcimadamore@1415:                     }
mcimadamore@1415:                 }
mcimadamore@1415:             }
mcimadamore@1415:         }
mcimadamore@1415:         System.out.println("total tests: " + count);
mcimadamore@1415:     }
mcimadamore@1415: }