Mercurial > jdk8-mips64-public > langtools / file comparison
comparison: src/share/classes/com/sun/tools/javac/api/MultiTaskListener.java
src/share/classes/com/sun/tools/javac/api/MultiTaskListener.java
- changeset 1210
- 62e611704863
- child 1339
- 0e5899f09dab
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| 1209:c4d6a8884ed8 | 1210:62e611704863 |
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| 1 /* | |
| 2 * Copyright (c) 2011, 2012, 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. Oracle designates this | |
| 8 * particular file as subject to the "Classpath" exception as provided | |
| 9 * by Oracle in the LICENSE file that accompanied this code. | |
| 10 * | |
| 11 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 * accompanied this code). | |
| 16 * | |
| 17 * You should have received a copy of the GNU General Public License version | |
| 18 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 * | |
| 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 * or visit www.oracle.com if you need additional information or have any | |
| 23 * questions. | |
| 24 */ | |
| 25 | |
| 26 package com.sun.tools.javac.api; | |
| 27 | |
| 28 import java.util.Arrays; | |
| 29 import java.util.Collection; | |
| 30 | |
| 31 import com.sun.source.util.TaskEvent; | |
| 32 import com.sun.source.util.TaskListener; | |
| 33 import com.sun.tools.javac.util.Context; | |
| 34 | |
| 35 /** | |
| 36 * TODO. | |
| 37 * | |
| 38 * <p><b>This is NOT part of any supported API. | |
| 39 * If you write code that depends on this, you do so at your own risk. | |
| 40 * This code and its internal interfaces are subject to change or | |
| 41 * deletion without notice.</b> | |
| 42 */ | |
| 43 public class MultiTaskListener implements TaskListener { | |
| 44 /** The context key for the MultiTaskListener. */ | |
| 45 public static final Context.Key<MultiTaskListener> taskListenerKey = | |
| 46 new Context.Key<MultiTaskListener>(); | |
| 47 | |
| 48 /** Get the MultiTaskListener instance for this context. */ | |
| 49 public static MultiTaskListener instance(Context context) { | |
| 50 MultiTaskListener instance = context.get(taskListenerKey); | |
| 51 if (instance == null) | |
| 52 instance = new MultiTaskListener(context); | |
| 53 return instance; | |
| 54 } | |
| 55 | |
| 56 protected MultiTaskListener(Context context) { | |
| 57 context.put(taskListenerKey, this); | |
| 58 ccw = ClientCodeWrapper.instance(context); | |
| 59 } | |
| 60 | |
| 61 /** | |
| 62 * The current set of registered listeners. | |
| 63 * This is a mutable reference to an immutable array. | |
| 64 */ | |
| 65 TaskListener[] listeners = { }; | |
| 66 | |
| 67 ClientCodeWrapper ccw; | |
| 68 | |
| 69 public Collection<TaskListener> getTaskListeners() { | |
| 70 return Arrays.asList(listeners); | |
| 71 } | |
| 72 | |
| 73 public boolean isEmpty() { | |
| 74 return (listeners.length == 0); | |
| 75 } | |
| 76 | |
| 77 public void add(TaskListener listener) { | |
| 78 for (TaskListener l: listeners) { | |
| 79 if (ccw.unwrap(l) == listener) | |
| 80 throw new IllegalStateException(); | |
| 81 } | |
| 82 TaskListener[] newListeners = new TaskListener[listeners.length + 1]; | |
| 83 System.arraycopy(listeners, 0, newListeners, 0, listeners.length); | |
| 84 newListeners[newListeners.length - 1] = ccw.wrap(listener); | |
| 85 listeners = newListeners; | |
| 86 } | |
| 87 | |
| 88 public void remove(TaskListener listener) { | |
| 89 for (int i = 0; i < listeners.length; i++) { | |
| 90 if (ccw.unwrap(listeners[i]) == listener) { | |
| 91 TaskListener[] newListeners = new TaskListener[listeners.length - 1]; | |
| 92 System.arraycopy(listeners, 0, newListeners, 0, i); | |
| 93 System.arraycopy(listeners, i + 1, newListeners, i, newListeners.length - i); | |
| 94 listeners = newListeners; | |
| 95 break; | |
| 96 } | |
| 97 } | |
| 98 } | |
| 99 | |
| 100 @Override | |
| 101 public void started(TaskEvent e) { | |
| 102 // guard against listeners being updated by a listener | |
| 103 TaskListener[] ll = this.listeners; | |
| 104 for (TaskListener l: ll) | |
| 105 l.started(e); | |
| 106 } | |
| 107 | |
| 108 @Override | |
| 109 public void finished(TaskEvent e) { | |
| 110 // guard against listeners being updated by a listener | |
| 111 TaskListener[] ll = this.listeners; | |
| 112 for (TaskListener l: ll) | |
| 113 l.finished(e); | |
| 114 } | |
| 115 | |
| 116 @Override | |
| 117 public String toString() { | |
| 118 return Arrays.toString(listeners); | |
| 119 } | |
| 120 } |
