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1 /*
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2 * $Header: /cvshome/build/org.osgi.framework/src/org/osgi/framework/ServiceEvent.java,v 1.15 2007/02/20 00:14:12 hargrave Exp $
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3 *
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4 * Copyright (c) OSGi Alliance (2000, 2007). All Rights Reserved.
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5 *
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6 * Licensed under the Apache License, Version 2.0 (the "License");
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7 * you may not use this file except in compliance with the License.
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8 * You may obtain a copy of the License at
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9 *
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10 * http://www.apache.org/licenses/LICENSE-2.0
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11 *
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12 * Unless required by applicable law or agreed to in writing, software
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13 * distributed under the License is distributed on an "AS IS" BASIS,
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14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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15 * See the License for the specific language governing permissions and
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16 * limitations under the License.
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17 */
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18
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19 // Port to the D programming language:
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20 // Frank Benoit <benoit@tionex.de>
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21 module org.osgi.framework.ServiceEvent;
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22
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23 import java.lang.all;
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24
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25 import org.osgi.framework.ServiceReference; // packageimport
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26
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27 import java.util.EventObject;
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28
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29 /**
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30 * An event from the Framework describing a service lifecycle change.
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31 * <p>
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32 * <code>ServiceEvent</code> objects are delivered to
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33 * <code>ServiceListener</code>s and <code>AllServiceListener</code>s when
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34 * a change occurs in this service's lifecycle. A type code is used to identify
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35 * the event type for future extendability.
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36 *
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37 * <p>
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38 * OSGi Alliance reserves the right to extend the set of types.
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39 *
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40 * @Immutable
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41 * @see ServiceListener
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42 * @see AllServiceListener
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43 * @version $Revision: 1.15 $
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44 */
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45
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46 public class ServiceEvent : EventObject {
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47 static final long serialVersionUID = 8792901483909409299L;
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48 /**
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49 * Reference to the service that had a change occur in its lifecycle.
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50 */
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51 private final ServiceReference reference;
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52
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53 /**
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54 * Type of service lifecycle change.
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55 */
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56 private final int type;
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57
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58 /**
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59 * This service has been registered.
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60 * <p>
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61 * This event is synchronously delivered <strong>after</strong> the service
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62 * has been registered with the Framework.
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63 *
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64 * <p>
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65 * The value of <code>REGISTERED</code> is 0x00000001.
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66 *
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67 * @see BundleContext#registerService(String[],Object,java.util.Dictionary)
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68 */
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69 public final static int REGISTERED = 0x00000001;
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70
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71 /**
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72 * The properties of a registered service have been modified.
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73 * <p>
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74 * This event is synchronously delivered <strong>after</strong> the service
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75 * properties have been modified.
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76 *
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77 * <p>
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78 * The value of <code>MODIFIED</code> is 0x00000002.
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79 *
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80 * @see ServiceRegistration#setProperties
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81 */
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82 public final static int MODIFIED = 0x00000002;
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83
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84 /**
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85 * This service is in the process of being unregistered.
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86 * <p>
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87 * This event is synchronously delivered <strong>before</strong> the
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88 * service has completed unregistering.
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89 *
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90 * <p>
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91 * If a bundle is using a service that is <code>UNREGISTERING</code>, the
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92 * bundle should release its use of the service when it receives this event.
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93 * If the bundle does not release its use of the service when it receives
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94 * this event, the Framework will automatically release the bundle's use of
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95 * the service while completing the service unregistration operation.
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96 *
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97 * <p>
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98 * The value of UNREGISTERING is 0x00000004.
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99 *
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100 * @see ServiceRegistration#unregister
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101 * @see BundleContext#ungetService
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102 */
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103 public final static int UNREGISTERING = 0x00000004;
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104
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105 /**
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106 * Creates a new service event object.
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107 *
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108 * @param type The event type.
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109 * @param reference A <code>ServiceReference</code> object to the service
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110 * that had a lifecycle change.
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111 */
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112 public this(int type, ServiceReference reference) {
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113 super(reference);
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114 this.reference = reference;
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115 this.type = type;
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116 }
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117
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118 /**
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119 * Returns a reference to the service that had a change occur in its
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120 * lifecycle.
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121 * <p>
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122 * This reference is the source of the event.
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123 *
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124 * @return Reference to the service that had a lifecycle change.
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125 */
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126 public ServiceReference getServiceReference() {
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127 return reference;
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128 }
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129
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130 /**
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131 * Returns the type of event. The event type values are:
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132 * <ul>
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133 * <li>{@link #REGISTERED}
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134 * <li>{@link #MODIFIED}
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135 * <li>{@link #UNREGISTERING}
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136 * </ul>
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137 *
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138 * @return Type of service lifecycle change.
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139 */
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140
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141 public int getType() {
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142 return type;
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143 }
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144 }
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