jdk8-mips64-public/langtools: src/share/classes/com/sun/source/util/TreePath.java@71f35e4b93a5 (annotated)

src/share/classes/com/sun/source/util/TreePath.java@71f35e4b93a5 (annotated)

src/share/classes/com/sun/source/util/TreePath.java

Wed, 23 Jan 2013 13:27:24 -0800

author: jjg
date: Wed, 23 Jan 2013 13:27:24 -0800
changeset 1521: 71f35e4b93a5
parent 1455: 75ab654b5cd5
child 1590: 011cf7e0a148
permissions: -rw-r--r--

8006775: JSR 308: Compiler changes in JDK8
Reviewed-by: jjg
Contributed-by: mernst@cs.washington.edu, wmdietl@cs.washington.edu, mpapi@csail.mit.edu, mahmood@notnoop.com

 /*
  * Copyright (c) 2006, 2012, 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.  Oracle designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Oracle in the LICENSE file that accompanied this code.
  *
  * 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.
  */
 package com.sun.source.util;
 import java.util.Iterator;
 import com.sun.source.tree.*;
 /**
  * A path of tree nodes, typically used to represent the sequence of ancestor
  * nodes of a tree node up to the top level CompilationUnitTree node.
  *
  * @author Jonathan Gibbons
  * @since 1.6
  */
 public class TreePath implements Iterable<Tree> {
     /**
      * Gets a tree path for a tree node within a compilation unit.
      * @return null if the node is not found
      */
     public static TreePath getPath(CompilationUnitTree unit, Tree target) {
         return getPath(new TreePath(unit), target);
     }
     /**
      * Gets a tree path for a tree node within a subtree identified by a TreePath object.
      * @return null if the node is not found
      */
     public static TreePath getPath(TreePath path, Tree target) {
         path.getClass();
         target.getClass();
         class Result extends Error {
             static final long serialVersionUID = -5942088234594905625L;
             TreePath path;
             Result(TreePath path) {
                 this.path = path;
             }
         }
         class PathFinder extends TreePathScanner<TreePath,Tree> {
             public TreePath scan(Tree tree, Tree target) {
                 if (tree == target) {
                     throw new Result(new TreePath(getCurrentPath(), target));
                 }
                 return super.scan(tree, target);
             }
         }
         if (path.getLeaf() == target) {
             return path;
         }
         try {
             new PathFinder().scan(path, target);
         } catch (Result result) {
             return result.path;
         }
         return null;
     }
     /**
      * Creates a TreePath for a root node.
      */
     public TreePath(CompilationUnitTree t) {
         this(null, t);
     }
     /**
      * Creates a TreePath for a child node.
      */
     public TreePath(TreePath p, Tree t) {
         if (t.getKind() == Tree.Kind.COMPILATION_UNIT) {
             compilationUnit = (CompilationUnitTree) t;
             parent = null;
         }
         else {
             compilationUnit = p.compilationUnit;
             parent = p;
         }
         leaf = t;
     }
     /**
      * Get the compilation unit associated with this path.
      */
     public CompilationUnitTree getCompilationUnit() {
         return compilationUnit;
     }
     /**
      * Get the leaf node for this path.
      */
     public Tree getLeaf() {
         return leaf;
     }
     /**
      * Get the path for the enclosing node, or null if there is no enclosing node.
      */
     public TreePath getParentPath() {
         return parent;
     }
     public Iterator<Tree> iterator() {
         return new Iterator<Tree>() {
             public boolean hasNext() {
                 return next != null;
             }
             public Tree next() {
                 Tree t = next.leaf;
                 next = next.parent;
                 return t;
             }
             public void remove() {
                 throw new UnsupportedOperationException();
             }
             private TreePath next = TreePath.this;
         };
     }
     private CompilationUnitTree compilationUnit;
     private Tree leaf;
     private TreePath parent;
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/source/util/TreePath.java@71f35e4b93a5 (annotated)

src/share/classes/com/sun/source/util/TreePath.java