1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/classes/com/sun/tools/javac/api/MultiTaskListener.java Tue Feb 28 10:33:49 2012 -0800
1.3 @@ -0,0 +1,120 @@
1.4 +/*
1.5 + * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Oracle designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Oracle in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 + * or visit www.oracle.com if you need additional information or have any
1.26 + * questions.
1.27 + */
1.28 +
1.29 +package com.sun.tools.javac.api;
1.30 +
1.31 +import java.util.Arrays;
1.32 +import java.util.Collection;
1.33 +
1.34 +import com.sun.source.util.TaskEvent;
1.35 +import com.sun.source.util.TaskListener;
1.36 +import com.sun.tools.javac.util.Context;
1.37 +
1.38 +/**
1.39 + * TODO.
1.40 + *
1.41 + * <p><b>This is NOT part of any supported API.
1.42 + * If you write code that depends on this, you do so at your own risk.
1.43 + * This code and its internal interfaces are subject to change or
1.44 + * deletion without notice.</b>
1.45 + */
1.46 +public class MultiTaskListener implements TaskListener {
1.47 + /** The context key for the MultiTaskListener. */
1.48 + public static final Context.Key<MultiTaskListener> taskListenerKey =
1.49 + new Context.Key<MultiTaskListener>();
1.50 +
1.51 + /** Get the MultiTaskListener instance for this context. */
1.52 + public static MultiTaskListener instance(Context context) {
1.53 + MultiTaskListener instance = context.get(taskListenerKey);
1.54 + if (instance == null)
1.55 + instance = new MultiTaskListener(context);
1.56 + return instance;
1.57 + }
1.58 +
1.59 + protected MultiTaskListener(Context context) {
1.60 + context.put(taskListenerKey, this);
1.61 + ccw = ClientCodeWrapper.instance(context);
1.62 + }
1.63 +
1.64 + /**
1.65 + * The current set of registered listeners.
1.66 + * This is a mutable reference to an immutable array.
1.67 + */
1.68 + TaskListener[] listeners = { };
1.69 +
1.70 + ClientCodeWrapper ccw;
1.71 +
1.72 + public Collection<TaskListener> getTaskListeners() {
1.73 + return Arrays.asList(listeners);
1.74 + }
1.75 +
1.76 + public boolean isEmpty() {
1.77 + return (listeners.length == 0);
1.78 + }
1.79 +
1.80 + public void add(TaskListener listener) {
1.81 + for (TaskListener l: listeners) {
1.82 + if (ccw.unwrap(l) == listener)
1.83 + throw new IllegalStateException();
1.84 + }
1.85 + TaskListener[] newListeners = new TaskListener[listeners.length + 1];
1.86 + System.arraycopy(listeners, 0, newListeners, 0, listeners.length);
1.87 + newListeners[newListeners.length - 1] = ccw.wrap(listener);
1.88 + listeners = newListeners;
1.89 + }
1.90 +
1.91 + public void remove(TaskListener listener) {
1.92 + for (int i = 0; i < listeners.length; i++) {
1.93 + if (ccw.unwrap(listeners[i]) == listener) {
1.94 + TaskListener[] newListeners = new TaskListener[listeners.length - 1];
1.95 + System.arraycopy(listeners, 0, newListeners, 0, i);
1.96 + System.arraycopy(listeners, i + 1, newListeners, i, newListeners.length - i);
1.97 + listeners = newListeners;
1.98 + break;
1.99 + }
1.100 + }
1.101 + }
1.102 +
1.103 + @Override
1.104 + public void started(TaskEvent e) {
1.105 + // guard against listeners being updated by a listener
1.106 + TaskListener[] ll = this.listeners;
1.107 + for (TaskListener l: ll)
1.108 + l.started(e);
1.109 + }
1.110 +
1.111 + @Override
1.112 + public void finished(TaskEvent e) {
1.113 + // guard against listeners being updated by a listener
1.114 + TaskListener[] ll = this.listeners;
1.115 + for (TaskListener l: ll)
1.116 + l.finished(e);
1.117 + }
1.118 +
1.119 + @Override
1.120 + public String toString() {
1.121 + return Arrays.toString(listeners);
1.122 + }
1.123 +}
