Mercurial > jdk8-mips64-public > langtools / file revision

 /*

  * Copyright (c) 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.

  */

 /**@test

  * @bug 8035890

  * @summary Verify that the parser correctly checks for source level 8 on the new places where

  *          annotations can appear in 8.

  * @run main CheckErrorsForSource7 CheckErrorsForSource7.java

  */

 import java.io.File;

 import java.io.IOException;

 import java.lang.annotation.ElementType;

 import java.lang.annotation.Target;

 import java.net.URI;

 import java.net.URISyntaxException;

 import java.util.ArrayList;

 import java.util.Arrays;

 import java.util.Collections;

 import java.util.Comparator;

 import java.util.HashSet;

 import java.util.List;

 import java.util.Set;

 import javax.tools.Diagnostic;

 import javax.tools.DiagnosticCollector;

 import javax.tools.JavaFileObject;

 import javax.tools.SimpleJavaFileObject;

 import com.sun.source.tree.AnnotationTree;

 import com.sun.source.tree.CompilationUnitTree;

 import com.sun.source.tree.IdentifierTree;

 import com.sun.source.tree.Tree.Kind;

 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;

 /**For each place where an annotation can syntactically appear with -source 8, but not with

  * -source 7, this test verifies that an error is correctly emitted from the parser for

  * the annotation for -source 7. This test first gathers the occurrences of @TA from

  * the CheckErrorsForSource7Data class below, and then repeatedly removes all these annotations

  * except one and checks the parser reports an expected error. This is needed as as the parser

  * typically produces only one 'insufficient source level' error for each new feature used.

  */

 public class CheckErrorsForSource7 {

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

         new CheckErrorsForSource7().run(args);

     }

     private void run(String... args) throws IOException, URISyntaxException {

         //the first and only parameter must be the name of the file to be analyzed:

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

         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");

         JavacFileManager fm = JavacTool.create().getStandardFileManager(null, null, null);

         //gather spans of the @TA annotations into typeAnnotationSpans:

         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();

         final List<int[]> typeAnnotationSpans = new ArrayList<>();

         new TreePathScanner<Void, Void>() {

             @Override

             public Void visitAnnotation(AnnotationTree node, Void p) {

                 if (node.getAnnotationType().getKind() == Kind.IDENTIFIER &&

                     ((IdentifierTree) node.getAnnotationType()).getName().contentEquals("TA")) {

                     int start = (int) trees.getSourcePositions().getStartPosition(cut, node);

                     int end = (int) trees.getSourcePositions().getEndPosition(cut, node);

                     typeAnnotationSpans.add(new int[] {start, end});

                 }

                 return null;

             }

         }.scan(cut, null);

         //sort the spans in the reverse order, to simplify removing them from the source:

         Collections.sort(typeAnnotationSpans, new Comparator<int[]>() {

             @Override

             public int compare(int[] o1, int[] o2) {

                 return o2[0] - o1[0];

             }

         });

         //verify the errors are produce correctly:

         String originalSource = cut.getSourceFile().getCharContent(false).toString();

         for (int[] toKeep : typeAnnotationSpans) {

             //prepare updated source code by removing all the annotations except the toKeep one:

             String updated = originalSource;

             for (int[] span : typeAnnotationSpans) {

                 if (span == toKeep) continue;

                 updated = updated.substring(0, span[0]) + updated.substring(span[1]);

             }

             //parse and verify:

             JavaFileObject updatedFile = new TestFO(cut.getSourceFile().toUri(), updated);

             DiagnosticCollector<JavaFileObject> errors = new DiagnosticCollector<>();

             JavacTask task2 = JavacTool.create().getTask(null,

                                                          fm,

                                                          errors,

                                                          Arrays.asList("-source", "7"),

                                                          null,

                                                          Arrays.asList(updatedFile));

             task2.parse();

             boolean found = false;

             for (Diagnostic<? extends JavaFileObject> d : errors.getDiagnostics()) {

                 if (d.getKind() == Diagnostic.Kind.ERROR && EXPECTED_ERRORS.contains(d.getCode())) {

                     if (found) {

                         throw new IllegalStateException("More than one expected error found.");

                     }

                     found = true;

                 }

             }

             if (!found)

                 throw new IllegalStateException("Did not produce proper errors for: " + updated);

         }

     }

     static final Set<String> EXPECTED_ERRORS = new HashSet<>(Arrays.asList(

         "compiler.err.type.annotations.not.supported.in.source",

         "compiler.err.annotations.after.type.params.not.supported.in.source"

     ));

     class TestFO extends SimpleJavaFileObject {

         private final String content;

         public TestFO(URI uri, String content) {

             super(uri, Kind.SOURCE);

             this.content = content;

         }

         @Override public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {

             return content;

         }

         @Override public boolean isNameCompatible(String simpleName, Kind kind) {

             return true;

         }

     }

 }

 //data on which the source level check is verified:

 class CheckErrorsForSource7Data {

     @Target(ElementType.TYPE_USE)

     @interface TA { }

     Object n1 = new @TA ArrayList<@TA String>();

     Object n2 = new @TA Object() {};

     Object [] @TA [] arr @TA[];

     <T> @TA int @TA[] ret(Object obj) @TA[] throws @TA Exception {

         this.<@TA String>ret(null);

         Object c1 = new @TA String[1];

         int val = obj instanceof @TA String ? ((@TA String) obj).length() : 0;

         List<@TA ?> l;

         return null;

     }

     void vararg(String @TA ... args) { }

     abstract class C<@TA T extends @TA Number & @TA Runnable>

                extends @TA ArrayList<@TA String>

                implements java.util. @TA Comparator<@TA T> { }

     interface I extends java.util. @TA Comparator<@TA String> { }

 }