jdk8-mips64-public/langtools: test/tools/javac/T6855236.java@d4e0ae9b4ecb

6855236: Compiler Tree API TreePath class generates NullPointerException from Iterator
Reviewed-by: darcy

     1 /*

     2  * Copyright 2010 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any 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 @SupportedSourceVersion(SourceVersion.RELEASE_6)

    42 @SupportedAnnotationTypes("*")

    43 public class T6855236 extends AbstractProcessor {

    45     private Trees trees;

    47     @Override

    48     public void init(ProcessingEnvironment pe) {

    49         super.init(pe);

    50         trees = Trees.instance(pe);

    51     }

    53     @Override

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

    55         // Scanner class to scan through various component elements

    56         CodeVisitor visitor = new CodeVisitor();

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

    59             TreePath tp = trees.getPath(e);

    60             visitor.scan(tp, trees);

    61         }

    63         return true;

    64     }

    66     class CodeVisitor extends TreePathScanner<Object, Trees> {

    68         @Override

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

    70             System.out.print("current path: ");

    71             for (Tree t : getCurrentPath()) {

    72                 System.out.print('/');

    73                 System.out.print(t);

    74            }

    75             System.out.println();

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

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

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

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

    80             }

    81             return super.visitMethodInvocation(node, p);

    82         }

    84         @Override

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

    86             ExpressionTree t = node.getExpression();

    87             System.out.println("expression statement: " + t.toString());

    88             return super.visitExpressionStatement(node, p);

    89         }

    91     }

    93 }

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