/*

 * 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

 * @summary Checks that the interaction between annotated and unannotated

  *         array levels in array creation trees

 */

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

import com.sun.tools.javac.tree.JCTree.JCNewArray;

import java.lang.annotation.*;

import java.io.File;

import java.io.PrintWriter;

import java.util.Arrays;

import java.util.List;

import java.util.Map;

import java.util.HashMap;

import javax.tools.JavaFileManager;

import javax.tools.JavaFileObject;

import com.sun.source.tree.*;

import com.sun.source.util.JavacTask;

import com.sun.source.util.TreeScanner;

import javax.tools.StandardJavaFileManager;

public class ArrayCreationTree {

    public static void main(String[] args) throws Exception {

        PrintWriter out = new PrintWriter(System.out, true);

        JavacTool tool = JavacTool.create();

        try (StandardJavaFileManager fm = tool.getStandardFileManager(null, null, null)) {

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

            Iterable<? extends JavaFileObject> f =

                fm.getJavaFileObjectsFromFiles(Arrays.asList(new File(testSrc, "ArrayCreationTree.java")));

            JavacTask task = tool.getTask(out, fm, null, null, null, f);

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

            out.flush();

            Scanner s = new Scanner();

            for (CompilationUnitTree t: trees)

                s.scan(t, null);

        }

    }

    private static class Scanner extends TreeScanner<Void,Void> {

        int foundAnnotations = 0;

        public Void visitCompilationUnit(CompilationUnitTree node, Void ignore) {

            super.visitCompilationUnit(node, ignore);

            if (foundAnnotations != expectedAnnotations) {

                throw new AssertionError("Expected " + expectedAnnotations +

                        " annotations but found: " + foundAnnotations);

            }

            return null;

        }

        private void testAnnotations(List<? extends AnnotationTree> annos, int found) {

            if (annos.isEmpty()) return;

            String annotation = annos.get(0).toString();

            foundAnnotations++;

            int expected = -1;

            if (annotation.equals("@A()"))

                expected = 0;

            else if (annotation.equals("@B()"))

                expected = 1;

            else if (annotation.equals("@C()"))

                expected = 2;

            else

                throw new AssertionError("found an unexpected annotation: " + annotation);

            if (found != expected) {

                throw new AssertionError("Unexpected found length" +

                    ", found " + found + " but expected " + expected);

            }

        }

        public Void visitAnnotatedType(AnnotatedTypeTree node, Void ignore) {

            testAnnotations(node.getAnnotations(), arrayLength(node));

            return super.visitAnnotatedType(node, ignore);

        }

        public Void visitNewArray(NewArrayTree node, Void ignore) {

            // the Tree API hasn't been updated to expose annotations yet

            JCNewArray newArray = (JCNewArray)node;

            int totalLength = node.getDimensions().size()

                                + arrayLength(node.getType())

                                + ((newArray.getInitializers() != null) ? 1 : 0);

            testAnnotations(newArray.annotations, totalLength);

            int count = 0;

            for (List<? extends AnnotationTree> annos : newArray.dimAnnotations) {

                testAnnotations(annos, totalLength - count);

                count++;

            }

            return super.visitNewArray(node, ignore);

        }

        private int arrayLength(Tree tree) {

            // TODO: the tree is null when called with node.getType(). Why?

            if (tree==null) return -1;

            switch (tree.getKind()) {

            case ARRAY_TYPE:

                return 1 + arrayLength(((ArrayTypeTree)tree).getType());

            case ANNOTATED_TYPE:

                return arrayLength(((AnnotatedTypeTree)tree).getUnderlyingType());

            default:

                return 0;

            }

        }

    }

    static int expectedAnnotations = 21;

    Object a1 = new @A Object @C [2] @B [1];

    Object b1 = new @A Object @C [2] @B [ ];

    Object c1 = new @A Object @C [ ] @B [ ] { };

    Object a2 = new @A Object @C [2]    [1];

    Object b2 = new @A Object @C [2]    [ ];

    Object c2 = new @A Object @C [ ]    [ ] { };

    Object a3 = new @A Object    [2] @B [1];

    Object b3 = new @A Object    [2] @B [ ];

    Object c3 = new @A Object    [ ] @B [ ] { };

    @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})

    @interface A {}

    @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})

    @interface B {}

    @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})

    @interface C {}

}