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Java example source code file (T7043922.java)

This example Java source code file (T7043922.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

abstract, classkind, constructorkind, errorchecker, exception, interface, javasource, net, network, string, stringbuilder, t7043922, util

The T7043922.java Java example source code

/*
 * Copyright (c) 2011, 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 7043922
 * @summary Regression: internal compiler error for nested anonymous inner class featuring varargs constructor
 */

import com.sun.source.util.JavacTask;
import com.sun.tools.javac.api.JavacTool;
import com.sun.tools.javac.util.List;

import java.net.URI;
import java.util.Arrays;
import java.util.Locale;
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 T7043922 {

    ClassKind[] classKinds;
    ConstructorKind[] constructorKinds;

    T7043922(ClassKind[] classKinds, ConstructorKind[] constructorKinds) {
        this.classKinds = classKinds;
        this.constructorKinds = constructorKinds;
    }

    void compileAndCheck() throws Exception {
        JavaSource source = new JavaSource();
        ErrorChecker ec = new ErrorChecker();
        JavacTask ct = (JavacTask)tool.getTask(null, fm, ec,
                null, null, Arrays.asList(source));
        ct.analyze();
        if (ec.errorFound) {
            throw new Error("invalid diagnostics for source:\n" +
                    source.getCharContent(true) +
                    "\nCompiler diagnostics:\n" + ec.printDiags());
        }
    }

    class JavaSource extends SimpleJavaFileObject {

        static final String source_template = "#C0 A0 { #K0 }\n" +
                                              "#C1 A1 { #K1 }\n" +
                                              "#C2 A2 { #K2 }\n" +
                                              "class D {\n" +
                                              "   void test() {\n" +
                                              "      new A0(#V0) {\n" +
                                              "         void test() {\n" +
                                              "            new A1(#V1) {\n" +
                                              "               void test() {\n" +
                                              "                   new A2(#V2) {};\n" +
                                              "               }\n" +
                                              "            };\n" +
                                              "         }\n" +
                                              "      };\n" +
                                              "   }\n" +
                                              "}\n";

        String source;

        public JavaSource() {
            super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
            source = source_template;
            for (int i = 0; i < 3; i++) {
                source = source.replaceAll("#C" + i, classKinds[i].classKind).
                    replaceAll("#K" + i, classKinds[i].getConstructor("A" + i, constructorKinds[i])).
                    replaceAll("#V" + i, constructorKinds[i].constrArgs);
            }
        }

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

    /** global decls ***/

    enum ConstructorKind {
        DEFAULT("", ""),
        FIXED_ARITY("String s", "\"\""),
        VARIABLE_ARITY("String... ss", "\"\",\"\"");

        String constrParam;
        String constrArgs;

        private ConstructorKind(String constrParam, String constrArgs) {
            this.constrParam = constrParam;
            this.constrArgs = constrArgs;
        }
    }

    enum ClassKind {
        ABSTRACT("abstract class"),
        CLASS("class"),
        INTERFACE("interface");

        String classKind;

        private ClassKind(String classKind) {
            this.classKind = classKind;
        }

        boolean isConstructorOk(ConstructorKind ck) {
            return this != INTERFACE ||
                    ck == ConstructorKind.DEFAULT;
        }

        String getConstructor(String className, ConstructorKind ck) {
            return this == INTERFACE ?
                "" :
                (className + "(" + ck.constrParam + ") {}");
        }
    }

    // Create a single file manager and JavaCompiler tool
    // and reuse them for each compile to save time.
    static final StandardJavaFileManager fm = JavacTool.create().getStandardFileManager(null, null, null);
    static final JavaCompiler tool = ToolProvider.getSystemJavaCompiler();

    public static void main(String... args) throws Exception {
        for (ClassKind classKind1 : ClassKind.values()) {
            for (ConstructorKind constrKind1 : ConstructorKind.values()) {
                if (!classKind1.isConstructorOk(constrKind1)) continue;
                for (ClassKind classKind2 : ClassKind.values()) {
                    for (ConstructorKind constrKind2 : ConstructorKind.values()) {
                        if (!classKind2.isConstructorOk(constrKind2)) continue;
                        for (ClassKind classKind3 : ClassKind.values()) {
                            for (ConstructorKind constrKind3 : ConstructorKind.values()) {
                                if (!classKind3.isConstructorOk(constrKind3)) continue;
                                new T7043922(new ClassKind[] { classKind1, classKind2, classKind3 },
                                        new ConstructorKind[] { constrKind1, constrKind2, constrKind3 }).compileAndCheck();
                            }
                        }
                    }
                }
            }
        }
    }

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

        boolean errorFound;
        List<String> errDiags = List.nil();

        public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
            if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {
                errDiags = errDiags.append(diagnostic.getMessage(Locale.getDefault()));
                errorFound = true;
            }
        }

        String printDiags() {
            StringBuilder buf = new StringBuilder();
            for (String s : errDiags) {
                buf.append(s);
                buf.append("\n");
            }
            return buf.toString();
        }
    }
}

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