Java example source code file (T6440583.java)

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Java - Java tags/keywords

assertionerror, boolean, erroneoustree, exception, iterable, javactool, javafileobject, jcerroneous, list, string, t6440583, tree, treescanner, util, void

The T6440583.java Java example source code

/*
 * Copyright (c) 2006, 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 6440583
 * @summary better error recovery
 */

import java.io.*;
import java.util.*;
import javax.tools.*;
import com.sun.source.tree.*;
import com.sun.source.util.*;
import com.sun.tools.javac.api.*;
import com.sun.tools.javac.tree.JCTree.*;

public class T6440583 {
    public static void main(String... args) throws Exception {
        String testSrc = System.getProperty("test.src", ".");
        String testClasses = System.getProperty("test.classes", ".");
        JavacTool tool = JavacTool.create();
        StandardJavaFileManager fm = tool.getStandardFileManager(null, null, null);
        Iterable<? extends JavaFileObject> files =
            fm.getJavaFileObjectsFromFiles(Arrays.asList(new File(testSrc, "A.java")));
        JavacTask task = tool.getTask(null, fm, null, null, null, files);

        Iterable<? extends Tree> trees = task.parse();

        TreeScanner<Boolean,Void> checker = new TreeScanner() {
            public Boolean visitErroneous(ErroneousTree tree, Void ignore) {
                JCErroneous etree = (JCErroneous) tree;
                List<? extends Tree> errs = etree.getErrorTrees();
                System.err.println("errs: " + errs);
                if (errs == null || errs.size() == 0)
                    throw new AssertionError("no error trees found");
                found = true;
                return true;
            }
        };

        for (Tree tree: trees)
            checker.scan(tree, null);

        if (!found)
            throw new AssertionError("no ErroneousTree nodes found");
    }

    private static boolean found;
}