Mercurial > jdk8-mips64-public > langtools / annotate
src/share/classes/com/sun/tools/javac/api/MultiTaskListener.java@959103a6100f (annotated)
src/share/classes/com/sun/tools/javac/api/MultiTaskListener.java
Wed, 27 Apr 2016 01:34:52 +0800
- author
- aoqi
- date
- Wed, 27 Apr 2016 01:34:52 +0800
- changeset 0
- 959103a6100f
- child 2525
- 2eb010b6cb22
- permissions
- -rw-r--r--
Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/langtools/
changeset: 2573:53ca196be1ae
tag: jdk8u25-b17
| aoqi@0 | 1 | /* |
| aoqi@0 | 2 | * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved. |
| aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| aoqi@0 | 4 | * |
| aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
| aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| aoqi@0 | 7 | * published by the Free Software Foundation. Oracle designates this |
| aoqi@0 | 8 | * particular file as subject to the "Classpath" exception as provided |
| aoqi@0 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
| aoqi@0 | 10 | * |
| aoqi@0 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| aoqi@0 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| aoqi@0 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| aoqi@0 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| aoqi@0 | 15 | * accompanied this code). |
| aoqi@0 | 16 | * |
| aoqi@0 | 17 | * You should have received a copy of the GNU General Public License version |
| aoqi@0 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| aoqi@0 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| aoqi@0 | 20 | * |
| aoqi@0 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| aoqi@0 | 22 | * or visit www.oracle.com if you need additional information or have any |
| aoqi@0 | 23 | * questions. |
| aoqi@0 | 24 | */ |
| aoqi@0 | 25 | |
| aoqi@0 | 26 | package com.sun.tools.javac.api; |
| aoqi@0 | 27 | |
| aoqi@0 | 28 | import java.util.Arrays; |
| aoqi@0 | 29 | import java.util.Collection; |
| aoqi@0 | 30 | |
| aoqi@0 | 31 | import com.sun.source.util.TaskEvent; |
| aoqi@0 | 32 | import com.sun.source.util.TaskListener; |
| aoqi@0 | 33 | import com.sun.tools.javac.util.Context; |
| aoqi@0 | 34 | |
| aoqi@0 | 35 | /** |
| aoqi@0 | 36 | * TODO. |
| aoqi@0 | 37 | * |
| aoqi@0 | 38 | * <p><b>This is NOT part of any supported API. |
| aoqi@0 | 39 | * If you write code that depends on this, you do so at your own risk. |
| aoqi@0 | 40 | * This code and its internal interfaces are subject to change or |
| aoqi@0 | 41 | * deletion without notice.</b> |
| aoqi@0 | 42 | */ |
| aoqi@0 | 43 | public class MultiTaskListener implements TaskListener { |
| aoqi@0 | 44 | /** The context key for the MultiTaskListener. */ |
| aoqi@0 | 45 | public static final Context.Key<MultiTaskListener> taskListenerKey = |
| aoqi@0 | 46 | new Context.Key<MultiTaskListener>(); |
| aoqi@0 | 47 | |
| aoqi@0 | 48 | /** Get the MultiTaskListener instance for this context. */ |
| aoqi@0 | 49 | public static MultiTaskListener instance(Context context) { |
| aoqi@0 | 50 | MultiTaskListener instance = context.get(taskListenerKey); |
| aoqi@0 | 51 | if (instance == null) |
| aoqi@0 | 52 | instance = new MultiTaskListener(context); |
| aoqi@0 | 53 | return instance; |
| aoqi@0 | 54 | } |
| aoqi@0 | 55 | |
| aoqi@0 | 56 | protected MultiTaskListener(Context context) { |
| aoqi@0 | 57 | context.put(taskListenerKey, this); |
| aoqi@0 | 58 | ccw = ClientCodeWrapper.instance(context); |
| aoqi@0 | 59 | } |
| aoqi@0 | 60 | |
| aoqi@0 | 61 | /** |
| aoqi@0 | 62 | * The current set of registered listeners. |
| aoqi@0 | 63 | * This is a mutable reference to an immutable array. |
| aoqi@0 | 64 | */ |
| aoqi@0 | 65 | TaskListener[] listeners = { }; |
| aoqi@0 | 66 | |
| aoqi@0 | 67 | ClientCodeWrapper ccw; |
| aoqi@0 | 68 | |
| aoqi@0 | 69 | public Collection<TaskListener> getTaskListeners() { |
| aoqi@0 | 70 | return Arrays.asList(listeners); |
| aoqi@0 | 71 | } |
| aoqi@0 | 72 | |
| aoqi@0 | 73 | public boolean isEmpty() { |
| aoqi@0 | 74 | return (listeners.length == 0); |
| aoqi@0 | 75 | } |
| aoqi@0 | 76 | |
| aoqi@0 | 77 | public void add(TaskListener listener) { |
| aoqi@0 | 78 | for (TaskListener l: listeners) { |
| aoqi@0 | 79 | if (ccw.unwrap(l) == listener) |
| aoqi@0 | 80 | throw new IllegalStateException(); |
| aoqi@0 | 81 | } |
| aoqi@0 | 82 | listeners = Arrays.copyOf(listeners, listeners.length + 1); |
| aoqi@0 | 83 | listeners[listeners.length - 1] = ccw.wrap(listener); |
| aoqi@0 | 84 | } |
| aoqi@0 | 85 | |
| aoqi@0 | 86 | public void remove(TaskListener listener) { |
| aoqi@0 | 87 | for (int i = 0; i < listeners.length; i++) { |
| aoqi@0 | 88 | if (ccw.unwrap(listeners[i]) == listener) { |
| aoqi@0 | 89 | TaskListener[] newListeners = new TaskListener[listeners.length - 1]; |
| aoqi@0 | 90 | System.arraycopy(listeners, 0, newListeners, 0, i); |
| aoqi@0 | 91 | System.arraycopy(listeners, i + 1, newListeners, i, newListeners.length - i); |
| aoqi@0 | 92 | listeners = newListeners; |
| aoqi@0 | 93 | break; |
| aoqi@0 | 94 | } |
| aoqi@0 | 95 | } |
| aoqi@0 | 96 | } |
| aoqi@0 | 97 | |
| aoqi@0 | 98 | @Override |
| aoqi@0 | 99 | public void started(TaskEvent e) { |
| aoqi@0 | 100 | // guard against listeners being updated by a listener |
| aoqi@0 | 101 | TaskListener[] ll = this.listeners; |
| aoqi@0 | 102 | for (TaskListener l: ll) |
| aoqi@0 | 103 | l.started(e); |
| aoqi@0 | 104 | } |
| aoqi@0 | 105 | |
| aoqi@0 | 106 | @Override |
| aoqi@0 | 107 | public void finished(TaskEvent e) { |
| aoqi@0 | 108 | // guard against listeners being updated by a listener |
| aoqi@0 | 109 | TaskListener[] ll = this.listeners; |
| aoqi@0 | 110 | for (TaskListener l: ll) |
| aoqi@0 | 111 | l.finished(e); |
| aoqi@0 | 112 | } |
| aoqi@0 | 113 | |
| aoqi@0 | 114 | @Override |
| aoqi@0 | 115 | public String toString() { |
| aoqi@0 | 116 | return Arrays.toString(listeners); |
| aoqi@0 | 117 | } |
| aoqi@0 | 118 | } |
