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Java example source code file (TestResolveError.java)

This example Java source code file (TestResolveError.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

assertionerror, declaredtype, exception, file, iterable, javactaskimpl, javafileobject, printwriter, stringwriter, testresolveerror, tooltester, typeelement, typemirror, unexpected

The TestResolveError.java Java example source code

/*
 * Copyright (c) 2010, 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 6930108
 * @summary IllegalArgumentException in AbstractDiagnosticFormatter for tools/javac/api/TestJavacTaskScanner.java
 * @library ./lib
 * @build ToolTester
 * @run main TestResolveError
 */

import java.io.*;
import javax.lang.model.element.Element;
import javax.lang.model.element.TypeElement;
import javax.lang.model.type.DeclaredType;
import javax.lang.model.type.TypeMirror;
import javax.lang.model.util.Elements;
import javax.lang.model.util.Types;
import javax.tools.*;

import com.sun.tools.javac.api.JavacTaskImpl;

/*
 * This is a cut down version of TestJavacTaskScanner, which as originally written
 * caused an IllegalArgumentException in AbstractDiagnosticFormatter as a result
 * of calling task.parseType with a name whose resolution depended on the setting
 * of the bootclasspath.
 * This test has the same call, task.parseType("List<String>", clazz), but checks
 * that the error is handled in a reasonable way by javac.
 */
public class TestResolveError extends ToolTester {
    public static void main(String... args) throws Exception {
        new TestResolveError().run();
    }

    void run() throws Exception {
        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw);
        File file = new File(test_src, "TestResolveError.java");
        final Iterable<? extends JavaFileObject> compilationUnits =
            fm.getJavaFileObjects(new File[] {file});
        task = (JavacTaskImpl)tool.getTask(pw, fm, null, null, null, compilationUnits);
        elements = task.getElements();
        types = task.getTypes();

        Iterable<? extends TypeElement> toplevels;
        try {
            toplevels = task.enter(task.parse());
        } catch (IOException ex) {
            throw new AssertionError(ex);
        }

        for (TypeElement clazz : toplevels) {
            System.out.format("Testing %s:%n%n", clazz.getSimpleName());
            // this should not cause any exception from the compiler,
            // such as IllegalArgumentException
            testParseType(clazz);
        }

        pw.close();

        String out = sw.toString();
        System.out.println(out);

        if (out.contains("com.sun.tools.javac.util"))
            throw new Exception("Unexpected output from compiler");
    }

    void testParseType(TypeElement clazz) {
        DeclaredType type = (DeclaredType)task.parseType("List<String>", clazz);
        for (Element member : elements.getAllMembers((TypeElement)type.asElement())) {
            TypeMirror mt = types.asMemberOf(type, member);
            System.out.format("%s : %s -> %s%n", member.getSimpleName(), member.asType(), mt);
        }
    }

    JavacTaskImpl task;
    Elements elements;
    Types types;
}

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