1 /* 2 * Copyright (c) 2010, 2015, 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 */ 23 24 /* 25 * @test 26 * @bug 6855236 27 * @summary Compiler Tree API TreePath class generates NullPointerException from Iterator 28 * @modules jdk.compiler 29 * @compile T6855236.java 30 * @compile -processor T6855236 -proc:only T6855236.java 31 */ 32 33 import java.util.*; 34 35 import javax.annotation.processing.*; 36 import javax.lang.model.*; 37 import javax.lang.model.element.*; 38 39 import com.sun.source.tree.*; 40 import com.sun.source.util.*; 41 42 @SupportedAnnotationTypes("*") 43 public class T6855236 extends AbstractProcessor { 44 45 private Trees trees; 46 47 @Override init(ProcessingEnvironment pe)48 public void init(ProcessingEnvironment pe) { 49 super.init(pe); 50 trees = Trees.instance(pe); 51 } 52 53 @Override process(Set<? extends TypeElement> arg0, RoundEnvironment roundEnvironment)54 public boolean process(Set<? extends TypeElement> arg0, RoundEnvironment roundEnvironment) { 55 // Scanner class to scan through various component elements 56 CodeVisitor visitor = new CodeVisitor(); 57 58 for (Element e : roundEnvironment.getRootElements()) { 59 TreePath tp = trees.getPath(e); 60 visitor.scan(tp, trees); 61 } 62 63 return true; 64 } 65 66 @Override getSupportedSourceVersion()67 public SourceVersion getSupportedSourceVersion() { 68 return SourceVersion.latest(); 69 } 70 71 class CodeVisitor extends TreePathScanner<Object, Trees> { 72 73 @Override visitMethodInvocation(MethodInvocationTree node, Trees p)74 public Object visitMethodInvocation(MethodInvocationTree node, Trees p) { 75 System.out.println("current path: "); 76 for (Tree t : getCurrentPath()) { 77 System.out.println(" " + t.getKind() + ": " + trim(t, 64)); 78 } 79 System.out.println("parent path: " + getCurrentPath().getParentPath()); 80 System.out.println("method select: " + node.getMethodSelect().toString()); 81 for (ExpressionTree arg : node.getArguments()) { 82 System.out.println("argument: " + arg.toString()); 83 } 84 return super.visitMethodInvocation(node, p); 85 } 86 87 @Override visitExpressionStatement(ExpressionStatementTree node, Trees p)88 public Object visitExpressionStatement(ExpressionStatementTree node, Trees p) { 89 ExpressionTree t = node.getExpression(); 90 System.out.println(); 91 System.out.println("expression statement: " + trim(t, 64)); 92 return super.visitExpressionStatement(node, p); 93 } 94 95 } 96 trim(Tree t, int len)97 private String trim(Tree t, int len) { 98 String s = t.toString().trim().replaceAll("\\s+", " "); 99 if (s.length() > len) 100 s = s.substring(0, len) + "..."; 101 return s; 102 } 103 104 } 105 106 107