Tue, 25 Sep 2012 13:11:05 -0700
7196464: upgrade JavaCompiler.shouldStopPolicy to accomodate policies in face of error and no error
Reviewed-by: mcimadamore
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 */
26 package com.sun.tools.javac.api;
28 import java.util.Arrays;
29 import java.util.Collection;
31 import com.sun.source.util.TaskEvent;
32 import com.sun.source.util.TaskListener;
33 import com.sun.tools.javac.util.Context;
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>();
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 }
56 protected MultiTaskListener(Context context) {
57 context.put(taskListenerKey, this);
58 ccw = ClientCodeWrapper.instance(context);
59 }
61 /**
62 * The current set of registered listeners.
63 * This is a mutable reference to an immutable array.
64 */
65 TaskListener[] listeners = { };
67 ClientCodeWrapper ccw;
69 public Collection<TaskListener> getTaskListeners() {
70 return Arrays.asList(listeners);
71 }
73 public boolean isEmpty() {
74 return (listeners.length == 0);
75 }
77 public void add(TaskListener listener) {
78 for (TaskListener l: listeners) {
79 if (ccw.unwrap(l) == listener)
80 throw new IllegalStateException();
81 }
82 listeners = Arrays.copyOf(listeners, listeners.length + 1);
83 listeners[listeners.length - 1] = ccw.wrap(listener);
84 }
86 public void remove(TaskListener listener) {
87 for (int i = 0; i < listeners.length; i++) {
88 if (ccw.unwrap(listeners[i]) == listener) {
89 TaskListener[] newListeners = new TaskListener[listeners.length - 1];
90 System.arraycopy(listeners, 0, newListeners, 0, i);
91 System.arraycopy(listeners, i + 1, newListeners, i, newListeners.length - i);
92 listeners = newListeners;
93 break;
94 }
95 }
96 }
98 @Override
99 public void started(TaskEvent e) {
100 // guard against listeners being updated by a listener
101 TaskListener[] ll = this.listeners;
102 for (TaskListener l: ll)
103 l.started(e);
104 }
106 @Override
107 public void finished(TaskEvent e) {
108 // guard against listeners being updated by a listener
109 TaskListener[] ll = this.listeners;
110 for (TaskListener l: ll)
111 l.finished(e);
112 }
114 @Override
115 public String toString() {
116 return Arrays.toString(listeners);
117 }
118 }