jdk8-mips64-public/langtools: test/tools/javac/T6855236.java@4868a36f6fd8

     1 /*

     2  * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    24 /*

    25  * @test

    26  * @bug 6855236

    27  * @summary Compiler Tree API TreePath class generates NullPointerException from Iterator

    28  * @compile T6855236.java

    29  * @compile -processor T6855236 -proc:only T6855236.java

    30  */

    32 import java.util.*;

    34 import javax.annotation.processing.*;

    35 import javax.lang.model.*;

    36 import javax.lang.model.element.*;

    38 import com.sun.source.tree.*;

    39 import com.sun.source.util.*;

    41 @SupportedAnnotationTypes("*")

    42 public class T6855236 extends AbstractProcessor {

    44     private Trees trees;

    46     @Override

    47     public void init(ProcessingEnvironment pe) {

    48         super.init(pe);

    49         trees = Trees.instance(pe);

    50     }

    52     @Override

    53     public boolean process(Set<? extends TypeElement> arg0, RoundEnvironment roundEnvironment) {

    54         // Scanner class to scan through various component elements

    55         CodeVisitor visitor = new CodeVisitor();

    57         for (Element e : roundEnvironment.getRootElements()) {

    58             TreePath tp = trees.getPath(e);

    59             visitor.scan(tp, trees);

    60         }

    62         return true;

    63     }

    65     @Override

    66     public SourceVersion getSupportedSourceVersion() {

    67         return SourceVersion.latest();

    68     }

    70     class CodeVisitor extends TreePathScanner<Object, Trees> {

    72         @Override

    73         public Object visitMethodInvocation(MethodInvocationTree node, Trees p) {

    74             System.out.println("current path: ");

    75             for (Tree t : getCurrentPath()) {

    76                 System.out.println("    " + t.getKind() + ": " + trim(t, 64));

    77             }

    78             System.out.println("parent path: " + getCurrentPath().getParentPath());

    79             System.out.println("method select: " + node.getMethodSelect().toString());

    80             for (ExpressionTree arg : node.getArguments()) {

    81                 System.out.println("argument: " + arg.toString());

    82             }

    83             return super.visitMethodInvocation(node, p);

    84         }

    86         @Override

    87         public Object visitExpressionStatement(ExpressionStatementTree node, Trees p) {

    88             ExpressionTree t = node.getExpression();

    89             System.out.println();

    90             System.out.println("expression statement: " + trim(t, 64));

    91             return super.visitExpressionStatement(node, p);

    92         }

    94     }

    96     private String trim(Tree t, int len) {

    97         String s = t.toString().trim().replaceAll("\\s+", " ");

    98         if (s.length() > len)

    99             s = s.substring(0, len) + "...";

   100         return s;

   101     }

   103 }

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