Java example source code file (ClassTreeTest.java)

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Java - Java tags/keywords

annotation_type, can\'t, classtree, classtreetest, enum, exception, file, interface, javactool, javafileobject, override, string, treescanner, unexpected, util

The ClassTreeTest.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 6570730
 * @summary com.sun.source.tree.ModifiersTree.getFlags() should return class type
 */

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.*;

public class ClassTreeTest {
    public static void main(String... args) throws Exception {
        new ClassTreeTest().run();
    }

    void run() throws Exception {
        JavacTool tool = JavacTool.create();
        StandardJavaFileManager fm = tool.getStandardFileManager(null, null, null);
        List<String> opts = Collections.emptyList();
        File testSrc = new File(System.getProperty("test.src"));
        File thisFile = new File(testSrc, ClassTreeTest.class.getSimpleName() + ".java");
        Iterable<? extends JavaFileObject> fos = fm.getJavaFileObjects(thisFile);
        JavacTask task = tool.getTask(null, fm, null, opts, null, fos);
        for (CompilationUnitTree cu: task.parse()) {
            check(cu, "CLASS", Tree.Kind.CLASS);
            check(cu, "INTERFACE", Tree.Kind.INTERFACE);
            check(cu, "ENUM", Tree.Kind.ENUM);
            check(cu, "ANNOTATION_TYPE", Tree.Kind.ANNOTATION_TYPE);
        }

        int expected = 4;
        if (checks != expected)
            error("Unexpected number of checks performed; expected: " + expected + ", found: " + checks);

        if (errors > 0)
            throw new Exception(errors + " errors found");
    }

    void check(CompilationUnitTree cu, String name, Tree.Kind k) {
        checks++;

        TreeScanner<ClassTree,String> s = new TreeScanner() {
            @Override
            public ClassTree visitClass(ClassTree c, String name) {
                if (c.getSimpleName().toString().equals(name))
                    return c;
                else
                    return super.visitClass(c, name);
            }

            @Override
            public ClassTree reduce(ClassTree t1, ClassTree t2) {
                return (t1 != null ? t1 : t2);
            }
        };

        ClassTree c = s.scan(cu, name);
        if (c == null)
            error("Can't find node named " + name);
        else if (c.getKind() != k)
            error("Unexpected kind for node named " + name + ": expected: " + k + ", found: " + c.getKind());
    }

    void error(String msg) {
        System.err.println("Error: " + msg);
        errors++;
    }

    int checks;
    int errors;

    class CLASS { }
    interface INTERFACE { }
    enum ENUM { }
    @interface ANNOTATION_TYPE { }
}