alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Java example source code file (StructuralMostSpecificTest.java)

This example Java source code file (StructuralMostSpecificTest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

argtypekind, diagnosticchecker, error, exceptionkind, integer, javasource, lambdareturnkind, net, network, object, rettypekind, short, string, structuralmostspecifictest, util, void

The StructuralMostSpecificTest.java Java example source code

/*
 * Copyright (c) 2012, 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 8006694
 * @summary Add lambda tests
 *  Automatic test for checking correctness of structural most specific test routine
 *  temporarily workaround combo tests are causing time out in several platforms
 * @library ../../lib
 * @build JavacTestingAbstractThreadedTest
 * @run main/othervm/timeout=600 StructuralMostSpecificTest
 */

// use /othervm to avoid jtreg timeout issues (CODETOOLS-7900047)
// see JDK-8006746

import java.net.URI;
import java.util.Arrays;
import javax.tools.Diagnostic;
import javax.tools.JavaFileObject;
import javax.tools.SimpleJavaFileObject;
import com.sun.source.util.JavacTask;
import com.sun.tools.javac.api.ClientCodeWrapper;
import com.sun.tools.javac.util.JCDiagnostic;

public class StructuralMostSpecificTest
    extends JavacTestingAbstractThreadedTest
    implements Runnable {

    enum RetTypeKind {
        SHORT("short"),
        INT("int"),
        OBJECT("Object"),
        INTEGER("Integer"),
        VOID("void"),
        J_L_VOID("Void");

        String retTypeStr;

        RetTypeKind(String retTypeStr) {
            this.retTypeStr = retTypeStr;
        }

        boolean moreSpecificThan(RetTypeKind rk) {
            return moreSpecificThan[this.ordinal()][rk.ordinal()];
        }

        static boolean[][] moreSpecificThan = {
                //              SHORT |  INT  | OBJECT | INTEGER | VOID  | J_L_VOID
                /* SHORT */   { true  , true  , true   , false   , false , false },
                /* INT */     { false , true  , true   , true    , false , false },
                /* OBJECT */  { false , false , true   , false   , false , false },
                /* INTEGER */ { false , false , true   , true    , false , false },
                /* VOID */    { false , false , false  , false   , true  , true  },
                /* J_L_VOID */{ false , false , true   , false   , false , true  } };
    }

    enum ArgTypeKind {
        SHORT("short"),
        INT("int"),
        BOOLEAN("boolean"),
        OBJECT("Object"),
        INTEGER("Integer"),
        DOUBLE("Double");

        String argTypeStr;

        ArgTypeKind(String typeStr) {
            this.argTypeStr = typeStr;
        }
    }

    enum ExceptionKind {
        NONE(""),
        EXCEPTION("throws Exception"),
        SQL_EXCEPTION("throws java.sql.SQLException"),
        IO_EXCEPTION("throws java.io.IOException");

        String exceptionStr;

        ExceptionKind(String exceptionStr) {
            this.exceptionStr = exceptionStr;
        }
    }

    enum LambdaReturnKind {
        VOID("return;"),
        SHORT("return (short)0;"),
        INT("return 0;"),
        INTEGER("return (Integer)null;"),
        NULL("return null;");

        String retStr;

        LambdaReturnKind(String retStr) {
            this.retStr = retStr;
        }

        boolean compatibleWith(RetTypeKind rk) {
            return compatibleWith[rk.ordinal()][ordinal()];
        }

        static boolean[][] compatibleWith = {
                //              VOID  | SHORT | INT     | INTEGER | NULL
                /* SHORT */   { false , true  , false   , false   , false },
                /* INT */     { false , true  , true    , true    , false },
                /* OBJECT */  { false , true  , true    , true    , true  },
                /* INTEGER */ { false , false , true    , true    , true  },
                /* VOID */    { true  , false , false   , false   , false },
                /* J_L_VOID */{ false , false , false   , false   , true  } };

        boolean needsConversion(RetTypeKind rk) {
            return needsConversion[rk.ordinal()][ordinal()];
        }

        static boolean[][] needsConversion = {
                //              VOID  | SHORT | INT     | INTEGER | NULL
                /* SHORT */   { false , false , false   , false   , false },
                /* INT */     { false , false , false   , true    , false },
                /* OBJECT */  { false , true  , true    , false   , false },
                /* INTEGER */ { false , false , true    , false   , false },
                /* VOID */    { false , false , false   , false   , false },
                /* J_L_VOID */{ true  , false , false   , false   , false } };
    }

    public static void main(String... args) throws Exception {
        for (LambdaReturnKind lrk : LambdaReturnKind.values()) {
            for (RetTypeKind rk1 : RetTypeKind.values()) {
                for (RetTypeKind rk2 : RetTypeKind.values()) {
                    for (ExceptionKind ek1 : ExceptionKind.values()) {
                        for (ExceptionKind ek2 : ExceptionKind.values()) {
                            for (ArgTypeKind ak11 : ArgTypeKind.values()) {
                                for (ArgTypeKind ak12 : ArgTypeKind.values()) {
                                    pool.execute(
                                        new StructuralMostSpecificTest(lrk, rk1,
                                            rk2, ek1, ek2, ak11, ak12));
                                }
                            }
                        }
                    }
                }
            }
        }

        checkAfterExec();
    }

    LambdaReturnKind lrk;
    RetTypeKind rt1, rt2;
    ArgTypeKind ak1, ak2;
    ExceptionKind ek1, ek2;
    JavaSource source;
    DiagnosticChecker diagChecker;

    StructuralMostSpecificTest(LambdaReturnKind lrk, RetTypeKind rt1, RetTypeKind rt2,
            ExceptionKind ek1, ExceptionKind ek2, ArgTypeKind ak1, ArgTypeKind ak2) {
        this.lrk = lrk;
        this.rt1 = rt1;
        this.rt2 = rt2;
        this.ek1 = ek1;
        this.ek2 = ek2;
        this.ak1 = ak1;
        this.ak2 = ak2;
        this.source = new JavaSource();
        this.diagChecker = new DiagnosticChecker();
    }

    class JavaSource extends SimpleJavaFileObject {

        String template = "interface SAM1 {\n" +
                          "   #R1 m(#A1 a1) #E1;\n" +
                          "}\n" +
                          "interface SAM2 {\n" +
                          "   #R2 m(#A2 a1) #E2;\n" +
                          "}\n" +
                          "class Test {\n" +
                          "   void m(SAM1 s) { }\n" +
                          "   void m(SAM2 s) { }\n" +
                          "   { m((#A1 x)->{ #LR }); }\n" +
                          "}\n";

        String source;

        public JavaSource() {
            super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
            source = template.replaceAll("#LR", lrk.retStr)
                    .replaceAll("#R1", rt1.retTypeStr)
                    .replaceAll("#R2", rt2.retTypeStr)
                    .replaceAll("#A1", ak1.argTypeStr)
                    .replaceAll("#A2", ak2.argTypeStr)
                    .replaceAll("#E1", ek1.exceptionStr)
                    .replaceAll("#E2", ek2.exceptionStr);
        }

        @Override
        public CharSequence getCharContent(boolean ignoreEncodingErrors) {
            return source;
        }
    }

    public void run() {
        JavacTask ct = (JavacTask)comp.getTask(null, fm.get(), diagChecker,
                Arrays.asList("-XDverboseResolution=all,-predef,-internal,-object-init"),
                null, Arrays.asList(source));
        try {
            ct.analyze();
        } catch (Throwable ex) {
            throw new
                AssertionError("Error thron when analyzing the following source:\n" +
                    source.getCharContent(true));
        }
        check();
    }

    void check() {
        checkCount.incrementAndGet();

        if (ak1 != ak2)
            return;

        if (!lrk.compatibleWith(rt1) || !lrk.compatibleWith(rt2))
            return;

        if (lrk.needsConversion(rt1) != lrk.needsConversion(rt2))
            return;

        boolean m1MoreSpecific = rt1.moreSpecificThan(rt2);
        boolean m2MoreSpecific = rt2.moreSpecificThan(rt1);

        boolean ambiguous = (m1MoreSpecific == m2MoreSpecific);

        if (ambiguous != diagChecker.ambiguityFound) {
            throw new Error("invalid diagnostics for source:\n" +
                source.getCharContent(true) +
                "\nAmbiguity found: " + diagChecker.ambiguityFound +
                "\nm1 more specific: " + m1MoreSpecific +
                "\nm2 more specific: " + m2MoreSpecific +
                "\nexpected ambiguity: " + ambiguous);
        }

        if (!ambiguous) {
            String sigToCheck = m1MoreSpecific ? "m(SAM1)" : "m(SAM2)";
            if (!sigToCheck.equals(diagChecker.mostSpecificSig)) {
                throw new Error("invalid most specific method selected:\n" +
                source.getCharContent(true) +
                "\nMost specific found: " + diagChecker.mostSpecificSig +
                "\nm1 more specific: " + m1MoreSpecific +
                "\nm2 more specific: " + m2MoreSpecific);
            }
        }
    }

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

        boolean ambiguityFound;
        String mostSpecificSig;

        public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
            try {
                if (diagnostic.getKind() == Diagnostic.Kind.ERROR &&
                        diagnostic.getCode().equals("compiler.err.ref.ambiguous")) {
                    ambiguityFound = true;
                } else if (diagnostic.getKind() == Diagnostic.Kind.NOTE &&
                        diagnostic.getCode()
                        .equals("compiler.note.verbose.resolve.multi")) {
                    ClientCodeWrapper.DiagnosticSourceUnwrapper dsu =
                        (ClientCodeWrapper.DiagnosticSourceUnwrapper)diagnostic;
                    JCDiagnostic.MultilineDiagnostic mdiag =
                        (JCDiagnostic.MultilineDiagnostic)dsu.d;
                    int mostSpecificIndex = (Integer)mdiag.getArgs()[2];
                    mostSpecificSig =
                        ((JCDiagnostic)mdiag.getSubdiagnostics()
                            .get(mostSpecificIndex)).getArgs()[1].toString();
                }
            } catch (RuntimeException t) {
                t.printStackTrace();
                throw t;
            }
        }
    }

}

Other Java examples (source code examples)

Here is a short list of links related to this Java StructuralMostSpecificTest.java source code file:

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2024 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.