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annotate graal/com.oracle.max.graal.compiler/src/com/oracle/max/graal/compiler/observer/ObservableCompiler.java @ 2874:d90bf514d647

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Renamed packages.
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Wed, 08 Jun 2011 08:59:54 +0200
parents graal/com.oracle.max.graal.compiler/src/com/sun/c1x/observer/ObservableCompiler.java@0341b6424579
children
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1 /*
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2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.max.graal.compiler.observer;
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24
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25 import java.util.*;
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26
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27 import com.oracle.max.graal.compiler.debug.*;
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28
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29 /**
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30 * Base class for compilers that notify subscribed {@link CompilationObserver CompilationObservers} of
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31 * {@link CompilationEvent CompilationEvents} that occur during their compilations.
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32 *
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33 * @author Peter Hofer
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34 */
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35 public class ObservableCompiler {
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36
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37 private List<CompilationObserver> observers;
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38
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39 /**
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40 * @return {@code true} if one or more observers are subscribed to receive notifications from this compiler,
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41 * {@code false} otherwise.
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42 */
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43 public boolean isObserved() {
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44 return observers != null && !TTY.isSuppressed();
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45 }
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46
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47 /**
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48 * Add the specified observer to receive events from this compiler.
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49 *
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50 * @param observer The observer to add.
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51 */
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52 public void addCompilationObserver(CompilationObserver observer) {
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53 assert observer != null;
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54
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55 if (observers == null) {
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56 observers = new LinkedList<CompilationObserver>();
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57 }
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58 observers.add(observer);
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59 }
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60
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61 public void fireCompilationStarted(CompilationEvent event) {
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62 if (isObserved()) {
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63 for (CompilationObserver observer : observers) {
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64 observer.compilationStarted(event);
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65 }
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66 }
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67 }
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68
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69 public void fireCompilationEvent(CompilationEvent event) {
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70 if (isObserved()) {
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71 for (CompilationObserver observer : observers) {
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72 observer.compilationEvent(event);
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73 }
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74 }
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75 }
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76
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77 public void fireCompilationFinished(CompilationEvent event) {
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78 if (isObserved()) {
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79 for (CompilationObserver observer : observers) {
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80 observer.compilationFinished(event);
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81 }
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82 }
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83 }
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84
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85 /**
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86 * Remove the specified observer so that it no longer receives events from this compiler.
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87 *
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88 * @param observer The observer to remove.
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89 */
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90 public void removeCompilationObserver(CompilationObserver observer) {
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91 if (observers != null) {
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92 observers.remove(observer);
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93 if (observers.size() == 0) {
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94 observers = null;
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95 }
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96 }
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97 }
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98
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99 }