/*

 * Copyright (c) 2013, 2014, 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.

 */

import com.sun.source.tree.CompilationUnitTree;

import com.sun.source.tree.IdentifierTree;

import com.sun.source.tree.MemberSelectTree;

import com.sun.source.util.JavacTask;

import com.sun.source.util.TreePathScanner;

import com.sun.source.util.Trees;

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

import com.sun.tools.javac.file.JavacFileManager;

import java.io.File;

import java.io.IOException;

import java.net.URISyntaxException;

import java.util.Collections;

import javax.lang.model.element.Element;

import javax.lang.model.element.ElementKind;

public class VerifyAnnotationsAttributed {

    public static void main(String... args) throws IOException, URISyntaxException {

        if (args.length != 1) throw new IllegalStateException("Must provide class name!");

        File testSrc = new File(System.getProperty("test.src"));

        File testFile = new File(testSrc, args[0]);

        if (!testFile.canRead()) throw new IllegalStateException("Cannot read the test source");

        try (JavacFileManager fm = JavacTool.create().getStandardFileManager(null, null, null)) {

            JavacTask task = JavacTool.create().getTask(null,

                                                        fm,

                                                        null,

                                                        Collections.<String>emptyList(),

                                                        null,

                                                        fm.getJavaFileObjects(testFile));

            final Trees trees = Trees.instance(task);

            final CompilationUnitTree cut = task.parse().iterator().next();

            task.analyze();

            //ensure all the annotation attributes are annotated meaningfully

            //all the attributes in the test file should contain either an identifier

            //or a select, so only checking those for a reasonable Element/Symbol.

            new TreePathScanner<Void, Void>() {

                @Override

                public Void visitIdentifier(IdentifierTree node, Void p) {

                    verifyAttributedMeaningfully();

                    return super.visitIdentifier(node, p);

                }

                @Override

                public Void visitMemberSelect(MemberSelectTree node, Void p) {

                    verifyAttributedMeaningfully();

                    return super.visitMemberSelect(node, p);

                }

                private void verifyAttributedMeaningfully() {

                    Element el = trees.getElement(getCurrentPath());

                    if (el == null || el.getKind() == ElementKind.OTHER) {

                        throw new IllegalStateException("Not attributed properly: " + getCurrentPath().getParentPath().getLeaf());

                    }

                }

            }.scan(cut, null);

        }

    }

}