jdk8-mips64-public/langtools: test/tools/javac/lambda/lambdaExpression/SamConversionComboTest.java@998b10c43157 (annotated)

test/tools/javac/lambda/lambdaExpression/SamConversionComboTest.java@998b10c43157 (annotated)

test/tools/javac/lambda/lambdaExpression/SamConversionComboTest.java

Tue, 24 Dec 2013 09:17:37 -0800

author: ksrini
date: Tue, 24 Dec 2013 09:17:37 -0800
changeset 2227: 998b10c43157
parent 1510: 7873d37f5b37
child 2370: acd64168cf8b
permissions: -rw-r--r--

8029230: Update copyright year to match last edit in jdk8 langtools repository for 2013
Reviewed-by: ksrini
Contributed-by: steve.sides@oracle.com

 /*
  * Copyright (c) 2011, 2013, 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
  *   Test SAM conversion of lambda expressions in combinations of different contexts,
  *           lambda body types(statement/expression), explict/implicit target type etc, to verify
  *           SAM conversion being conducted successfully as expected.
  */
 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.ToolProvider;
 public class SamConversionComboTest {
     enum FInterface {
         A("A", "interface A { Integer m(int i); }"),
         B("B", "interface B { int m(Integer i); }"),
         C("C", "interface C { int m(Integer i) throws Exception; }");
         String interfaceType;
         String interfaceDef;
         FInterface(String interfaceType, String interfaceDef) {
             this.interfaceType = interfaceType;
             this.interfaceDef = interfaceDef;
         }
         String getParameterType() {
             switch(this) {
             case A:
                 return "int";
             case B:
             case C:
                 return "Integer";
             default:
                 return null;
             }
         }
     }
     enum Context {
         ASSIGNMENT("#FType f = #LBody;"),
         METHOD_CALL("void method1(#FType f) { }\n" +
                     "    void method2() {\n" +
                     "        method1(#LBody);\n" +
                     "    }"),
         CONSTRUCTOR("X x = new X(#LBody);"),
         RETURN_OF_METHOD("#FType method1() {\n" +
                          "    return #LBody;\n" +
                          "}"),
         ARRAY_INITIALIZER("Object[] oarray = {\"a\", 1, (#FType)#LBody};"),
         LAMBDA_BODY("#FType f = n -> ((#FType)#LBody).m(n);"),
         CAST("void test() throws Exception { int n = ((#FType)#LBody).m(1); }"),
         CONDITIONAL_EXPRESSION("#FType f = 2 > 1 ? #LBody : null;");
         String context;
         Context(String context) {
             this.context = context;
         }
         String getContext(FInterface f, LambdaKind lk, LambdaBody lb, ReturnValue rv) {
             return context.replace("#FType", f.interfaceType).replace("#LBody", lb.getLambdaBody(f, lk, rv));
         }
     }
     enum LambdaKind {
         EXPRESSION("#VAL"),
         STATEMENT("{return #VAL;}"),
         EXCEPTION_STMT("{throw new Exception();}");
         String stmt;
         LambdaKind(String stmt) {
             this.stmt = stmt;
         }
     }
     enum ReturnValue {
         INT("i + 1"),
         INTEGER("new Integer(i+1)"),
         INT2("i.intValue() + 1"),
         STRING("i + \"\""),
         DOUBLE("i * 1.0");
         String rValue;
         ReturnValue(String rValue) {
             this.rValue = rValue;
         }
     }
     enum LambdaBody {
         IMPLICIT("i -> #RET"),//type inferred
         EXPLICIT("(#Type i) -> #RET");//explicit type
         String bodyStr;
         LambdaBody(String bodyStr) {
             this.bodyStr = bodyStr;
         }
         String getLambdaBody(FInterface fi, LambdaKind lk, ReturnValue rv) {
             return bodyStr.replace("#Type", fi.getParameterType()).replace("#RET", lk.stmt.replace("#VAL", rv.rValue));
         }
     }
     boolean checkSamConversion() {
         if(lambdaKind != LambdaKind.EXCEPTION_STMT && (returnValue == ReturnValue.DOUBLE || returnValue == ReturnValue.STRING)) //return type mismatch
             return false;
         if(context != Context.CONSTRUCTOR) {//context other than construcotr argument
             if(fInterface != FInterface.C && lambdaKind == LambdaKind.EXCEPTION_STMT)
                 return false;
             if(fInterface == FInterface.A && returnValue == ReturnValue.INT2)
                 return false;
         }
         else { //constructor argument context
             //match X(A a) or X(B b) or X(C c)
             if (lambdaKind == LambdaKind.EXCEPTION_STMT) {
                 return false; //ambiguous target type
             }
             else if(lambdaBody == LambdaBody.IMPLICIT) {
                 return false;
             }
             else { //explicit parameter type
                 if(fInterface.getParameterType().equals("Integer")) //ambiguous target type
                 //e.g. X x = new X((Integer i) -> i + 1);
                     return false;
                 if(returnValue == ReturnValue.INT2)
                 //e.g. X x = new X(int i -> i.intValue() + 1);
                     return false;
             }
         }
         return true;
     }
     SourceFile samSourceFile = new SourceFile("FInterface.java", "#C") {
         public String toString() {
             String interfaces = "";
             for(FInterface fi : FInterface.values())
                 interfaces += fi.interfaceDef + "\n";
             return template.replace("#C", interfaces);
         }
     };
     String clientTemplate = "class Client {\n" +
                             "    #Context\n" +
                             "}\n\n" +
                             "class X {\n" +
                             "    int value = 0;\n\n" +
                             "    X(A a) {\n" +
                             "        value = a.m(6);\n" +
                             "    }\n\n" +
                             "    X(B b) {\n" +
                             "        value = b.m(7);\n" +
                             "    }\n\n" +
                             "    X(C c) {\n" +
                             "        try {\n" +
                             "            value = c.m(8);\n" +
                             "        } catch (Exception e){}\n" +
                             "    }\n" +
                             "}";
     SourceFile clientSourceFile = new SourceFile("Client.java", clientTemplate) {
         public String toString() {
             return template.replace("#Context", context.getContext(fInterface, lambdaKind, lambdaBody, returnValue));
         }
     };
     void test() throws Exception {
         System.out.println("\n====================================");
         System.out.println(fInterface + ", " +  context + ", " + lambdaKind + ", " + lambdaBody + ", " + returnValue);
         System.out.println(samSourceFile + "\n");
         String clientFileStr = clientSourceFile.toString();
         System.out.println(clientFileStr.substring(0, clientFileStr.indexOf("\n\n")));
         final JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
         DiagnosticChecker dc = new DiagnosticChecker();
         JavacTask ct = (JavacTask)tool.getTask(null, null, dc, null, null, Arrays.asList(samSourceFile, clientSourceFile));
         ct.analyze();
         if (dc.errorFound == checkSamConversion()) {
             throw new AssertionError(samSourceFile + "\n\n" + clientSourceFile);
         }
         count++;
     }
     abstract class SourceFile extends SimpleJavaFileObject {
         protected String template;
         public SourceFile(String filename, String template) {
             super(URI.create("myfo:/" + filename), JavaFileObject.Kind.SOURCE);
             this.template = template;
         }
         @Override
         public CharSequence getCharContent(boolean ignoreEncodingErrors) {
             return toString();
         }
         public abstract String toString();
     }
     static class DiagnosticChecker implements javax.tools.DiagnosticListener<JavaFileObject> {
         boolean errorFound = false;
         public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
             if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {
                 errorFound = true;
             }
         }
     }
     FInterface fInterface;
     Context context;
     LambdaBody lambdaBody;
     LambdaKind lambdaKind;
     ReturnValue returnValue;
     static int count = 0;
     SamConversionComboTest(FInterface f, Context c, LambdaBody lb, LambdaKind lk, ReturnValue rv) {
         fInterface = f;
         context = c;
         lambdaKind = lk;
         lambdaBody = lb;
         returnValue = rv;
     }
     public static void main(String[] args) throws Exception {
         for(Context ct : Context.values()) {
             for (FInterface fi : FInterface.values()) {
                 for (LambdaKind lk: LambdaKind.values()) {
                     for (LambdaBody lb : LambdaBody.values()) {
                         for(ReturnValue rv : ReturnValue.values()) {
                             new SamConversionComboTest(fi, ct, lb, lk, rv).test();
                         }
                     }
                 }
             }
         }
         System.out.println("total tests: " + count);
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

test/tools/javac/lambda/lambdaExpression/SamConversionComboTest.java@998b10c43157 (annotated)

test/tools/javac/lambda/lambdaExpression/SamConversionComboTest.java