| /* |
| * Copyright (c) 2001, 2008, 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.tools.javac.comp; |
| |
| import java.util.AbstractQueue; |
| import com.sun.tools.javac.util.Context; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.LinkedList; |
| import java.util.Map; |
| import java.util.Queue; |
| import javax.tools.JavaFileObject; |
| |
| /** A queue of all as yet unattributed classes. |
| * |
| * <p><b>This is NOT part of any supported API. |
| * If you write code that depends on this, you do so at your own risk. |
| * This code and its internal interfaces are subject to change or |
| * deletion without notice.</b> |
| */ |
| public class Todo extends AbstractQueue<Env<AttrContext>> { |
| /** The context key for the todo list. */ |
| protected static final Context.Key<Todo> todoKey = |
| new Context.Key<Todo>(); |
| |
| /** Get the Todo instance for this context. */ |
| public static Todo instance(Context context) { |
| Todo instance = context.get(todoKey); |
| if (instance == null) |
| instance = new Todo(context); |
| return instance; |
| } |
| |
| /** Create a new todo list. */ |
| protected Todo(Context context) { |
| context.put(todoKey, this); |
| } |
| |
| public void append(Env<AttrContext> env) { |
| add(env); |
| } |
| |
| @Override |
| public Iterator<Env<AttrContext>> iterator() { |
| return contents.iterator(); |
| } |
| |
| @Override |
| public int size() { |
| return contents.size(); |
| } |
| |
| public boolean offer(Env<AttrContext> e) { |
| if (contents.add(e)) { |
| if (contentsByFile != null) |
| addByFile(e); |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| public Env<AttrContext> poll() { |
| if (size() == 0) |
| return null; |
| Env<AttrContext> env = contents.remove(0); |
| if (contentsByFile != null) |
| removeByFile(env); |
| return env; |
| } |
| |
| public Env<AttrContext> peek() { |
| return (size() == 0 ? null : contents.get(0)); |
| } |
| |
| public Queue<Queue<Env<AttrContext>>> groupByFile() { |
| if (contentsByFile == null) { |
| contentsByFile = new LinkedList<Queue<Env<AttrContext>>>(); |
| for (Env<AttrContext> env: contents) { |
| addByFile(env); |
| } |
| } |
| return contentsByFile; |
| } |
| |
| private void addByFile(Env<AttrContext> env) { |
| JavaFileObject file = env.toplevel.sourcefile; |
| if (fileMap == null) |
| fileMap = new HashMap<JavaFileObject, FileQueue>(); |
| FileQueue fq = fileMap.get(file); |
| if (fq == null) { |
| fq = new FileQueue(); |
| fileMap.put(file, fq); |
| contentsByFile.add(fq); |
| } |
| fq.fileContents.add(env); |
| } |
| |
| private void removeByFile(Env<AttrContext> env) { |
| JavaFileObject file = env.toplevel.sourcefile; |
| FileQueue fq = fileMap.get(file); |
| if (fq == null) |
| return; |
| if (fq.fileContents.remove(env)) { |
| if (fq.isEmpty()) { |
| fileMap.remove(file); |
| contentsByFile.remove(fq); |
| } |
| } |
| } |
| |
| LinkedList<Env<AttrContext>> contents = new LinkedList<Env<AttrContext>>(); |
| LinkedList<Queue<Env<AttrContext>>> contentsByFile; |
| Map<JavaFileObject, FileQueue> fileMap; |
| |
| class FileQueue extends AbstractQueue<Env<AttrContext>> { |
| @Override |
| public Iterator<Env<AttrContext>> iterator() { |
| return fileContents.iterator(); |
| } |
| |
| @Override |
| public int size() { |
| return fileContents.size(); |
| } |
| |
| public boolean offer(Env<AttrContext> e) { |
| if (fileContents.offer(e)) { |
| contents.add(e); |
| return true; |
| } |
| return false; |
| } |
| |
| public Env<AttrContext> poll() { |
| if (fileContents.size() == 0) |
| return null; |
| Env<AttrContext> env = fileContents.remove(0); |
| contents.remove(env); |
| return env; |
| } |
| |
| public Env<AttrContext> peek() { |
| return (fileContents.size() == 0 ? null : fileContents.get(0)); |
| } |
| |
| LinkedList<Env<AttrContext>> fileContents = new LinkedList<Env<AttrContext>>(); |
| } |
| } |