author | hgs |
Mon, 04 Oct 2010 11:29:25 +0300 | |
changeset 78 | 71ad690e91f5 |
parent 49 | 35baca0e7a2e |
child 80 | d6dafc5d983f |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008-2010 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* |
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*/ |
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|
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package com.nokia.mj.impl.rt.support; |
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|
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import com.nokia.mj.impl.utils.Uid; |
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import java.util.Vector; |
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import java.util.Enumeration; |
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import java.security.Permission; |
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import java.security.AccessControlException; |
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|
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/** |
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* ApplicationUtils is an abstract base class for API implementations, |
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* which allows them to use miscellanous utilities related to the running |
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* application. |
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* <p> |
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* The class provides a static getter method for getting an instance of |
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* the running application. In those runtimes that are always running only |
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* one instance (like MIDP) returns always the same instance of the |
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* ApplicationUtils. However those runtimes (like eRCP), that may run several |
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* application in the same JVM instance, will return an application specific |
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* instance. |
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* <p> |
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* The runtime implementation hides the solving of the correct application |
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* when method <code>getInstace</code> is called. However it must be noted |
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* that if the call is made some common thread, the <code>getInstace</code> |
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* might not able to solve the correct application. |
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* <p> |
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* Example how to register a shutdown listener. |
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* <pre> |
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* package com.nokia.mj.impl.mypackage; |
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* |
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* import com.nokia.mj.impl.rt.support.ApplicationUtils; |
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* import com.nokia.mj.impl.rt.support.ShutdownListener; |
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* public MyClass |
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* { |
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* public void myMethod() |
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* { |
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* // Get the instance of ApplicationUtils. |
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* ApplicationUtils appUtils = ApplicationUtils.getInstance(); |
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* |
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* // Get the name of the application. |
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* appUtils.addShutdownListener(new ShutdownListener() |
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* { |
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* public void shuttingDown() |
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* { |
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* //Do cleaning... |
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* } |
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* |
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* }); |
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* |
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* |
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* // My implementation... |
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* } |
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* } |
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*</pre> |
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* @author Nokia Corporation |
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* @version 1.0 |
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*/ |
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|
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public abstract class ApplicationUtils |
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{ |
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/** |
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* Name of the runtime specific class that extends this base class. |
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*/ |
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private static final String PORTCLASS = ".ApplicationUtilsImpl"; |
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|
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/** |
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* A singleton instance of runtime dependent instance of class extending |
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* the ApplicationUtils base class. |
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*/ |
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protected static ApplicationUtils sInstance = null; |
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|
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/** |
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* A set of listeners who wants to receive notification when the |
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* application is abaout to close. |
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*/ |
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private Vector mListeners; |
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/** |
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* A lock for synchronizing the thw start up waiting feature. |
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*/ |
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private Object mApplicationStartLock = new Object(); |
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/** |
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* Information wheteher to continue start up or cancel it. |
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*/ |
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private Boolean mStartCmd; |
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105 |
|
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106 |
|
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107 |
/** |
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* When this class is first loaded the static initializer will create a |
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* singleton instance of runtime dependent instance of class extending the |
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* ApplicationUtils base class. The class is created using dynamic |
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|
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* instantiation (<code>Class.forname & Class.newInstance</code>) and |
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|
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* the name of the class is a combination of PACKAGE_PREFIX + |
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* <value of system property PACKAGE_END_PROPERTY_NAME > |
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* + .<value of PORTCLASS member variable >. |
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115 |
*/ |
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static |
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{ |
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//Get the system proptery defining the end of package. |
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String packageEnd = |
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System.getProperty(ApplicationInfo.PACKAGE_END_PROPERTY_NAME); |
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121 |
|
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if (packageEnd == null) |
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123 |
{ |
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throw new RuntimeException |
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("Not able to load " + PORTCLASS + "class since " + |
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ApplicationInfo.PACKAGE_END_PROPERTY_NAME + |
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" system property is undefined"); |
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} |
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129 |
|
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//Construct the class |
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String className = ApplicationInfo.PACKAGE_PREFIX + |
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|
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packageEnd + PORTCLASS; |
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133 |
try |
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134 |
{ |
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Class clazz = Class.forName(className); |
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|
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sInstance = (ApplicationUtils)clazz.newInstance(); |
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|
137 |
} |
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138 |
catch (Exception e) |
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139 |
{ |
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e.printStackTrace(); |
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Revision: v2.1.22
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|
141 |
throw new RuntimeException("Not able to instantiate class " + |
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|
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className+". Reason is: " + e); |
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Revision: v2.1.22
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|
143 |
} |
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Revision: v2.1.22
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144 |
} |
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Revision: v2.1.22
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|
145 |
|
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Revision: v2.1.22
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|
146 |
/** |
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Revision: v2.1.22
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|
147 |
* Returns an instace of ApplicationUtils class which provides access to |
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Revision: v2.1.22
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148 |
* application related runtime services. |
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Revision: v2.1.22
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149 |
* |
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|
150 |
* @return the ApplicationUtils object, null if the construction of the |
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Revision: v2.1.22
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|
151 |
* object has faild |
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Revision: v2.1.22
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|
152 |
*/ |
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|
153 |
public static ApplicationUtils getInstance() |
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Revision: v2.1.22
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|
154 |
{ |
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Revision: v2.1.22
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155 |
return sInstance; |
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Revision: v2.1.22
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156 |
} |
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Revision: v2.1.22
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|
157 |
|
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Revision: v2.1.22
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|
158 |
/** |
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Revision: v2.1.22
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|
159 |
* Notifies the runtime that an exit command has been received and the |
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Revision: v2.1.22
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|
160 |
* application is being tried to close nicely. The runtime is responsible |
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Revision: v2.1.22
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|
161 |
* for killing the application if it doesn't close itself nicely after |
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Revision: v2.1.22
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|
162 |
* specified grace time. The specified grace time is runtime dependent. |
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Revision: v2.1.22
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|
163 |
* <p> |
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Revision: v2.1.22
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|
164 |
* This method is meant ONLY for the UI and no other API are allowed |
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Revision: v2.1.22
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|
165 |
* to use it. The UI must use this API ONLY when the user explicitly |
49 | 166 |
* wants to close the application using some platform dependent feature |
21
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Revision: v2.1.22
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|
167 |
* (e.g. red key in S60). If the user tries to close the application |
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Revision: v2.1.22
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|
168 |
* using the mechanism provided by the application itself, this method |
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Revision: v2.1.22
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|
169 |
* must not be called. |
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Revision: v2.1.22
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|
170 |
* <p> |
49 | 171 |
* Note that calling this method might cause the UI framework to call |
172 |
* uiDisposed method, depending on which UI framework is used. |
|
173 |
* <p> |
|
21
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Revision: v2.1.22
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|
174 |
* This method is a problematic in such runtimes that may run more than one |
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Revision: v2.1.22
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|
175 |
* application in same JVM instance (e.g. eRCP). If the application |
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Revision: v2.1.22
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|
176 |
* doesn't close nicely the runtime may have to terminate |
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Revision: v2.1.22
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|
177 |
* the whole JVM process, which leads closing all the running applications |
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Revision: v2.1.22
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|
178 |
* and the runtime itself. |
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Revision: v2.1.22
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|
179 |
* |
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|
180 |
*/ |
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Revision: v2.1.22
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|
181 |
public abstract void notifyExitCmd(); |
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|
182 |
|
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|
183 |
/** |
49 | 184 |
* Notifies the runtime that UI has been disposed. The runtime is |
185 |
* responsible for killing the application if it doesn't close itself |
|
186 |
* nicely after specified grace time. The specified grace time is |
|
187 |
* runtime dependent. |
|
188 |
* <p> |
|
189 |
* This method is meant ONLY for the UI and no other API are allowed |
|
190 |
* to use it. |
|
191 |
* <p> |
|
192 |
* It is possible that the method is called several times from different |
|
193 |
* phases of the UI exit sequence. |
|
194 |
*/ |
|
195 |
public void uiDisposed() |
|
196 |
{ |
|
197 |
notifyExitCmd(); |
|
198 |
} |
|
199 |
||
200 |
/** |
|
21
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Revision: v2.1.22
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|
201 |
* Determines whether the access request indicated by the specified |
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Revision: v2.1.22
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|
202 |
* permission should be allowed or denied, based on the security policy |
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Revision: v2.1.22
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|
203 |
* currently in effect. This method quietly returns if the access request |
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Revision: v2.1.22
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|
204 |
* is permitted, or throws a suitable AccessControlException otherwise. |
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Revision: v2.1.22
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|
205 |
* <p> |
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Revision: v2.1.22
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|
206 |
* The design decision was that all the API implementation should use this |
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Revision: v2.1.22
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|
207 |
* method for making security checkings and avoid using the |
2a9601315dfc
Revision: v2.1.22
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|
208 |
* <code>checkPermission</code> method <code>AccessController</code> class, |
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Revision: v2.1.22
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|
209 |
* which is left for application usage only. |
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Revision: v2.1.22
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|
210 |
* <p> |
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Revision: v2.1.22
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|
211 |
* The runtime implementation is responsible for forwarding security |
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Revision: v2.1.22
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|
212 |
* checking to correct securty handler. In MIDP this would be Midp security |
2a9601315dfc
Revision: v2.1.22
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diff
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|
213 |
* component while in 'main' type of application the handler would be the |
2a9601315dfc
Revision: v2.1.22
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|
214 |
* <code>AccessController</code> class. |
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Revision: v2.1.22
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|
215 |
* |
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Revision: v2.1.22
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|
216 |
* @param p the requested permission. |
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Revision: v2.1.22
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|
217 |
* @throws AccessControlException if the specified permission is not |
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Revision: v2.1.22
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|
218 |
* permitted, based on the current security policy. |
2a9601315dfc
Revision: v2.1.22
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|
219 |
* @throws NullPointerException if the specified permission is null. |
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Revision: v2.1.22
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|
220 |
*/ |
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Revision: v2.1.22
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public abstract void checkPermission(Permission p) |
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throws AccessControlException, |
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|
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NullPointerException; |
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224 |
|
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public abstract void checkPermission(Uid appUid,Permission p) |
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throws AccessControlException, |
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NullPointerException; |
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|
228 |
|
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Revision: v2.1.22
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/** |
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* Adds a shutdown notifications listener to receive notifications when |
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Revision: v2.1.22
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* the application is about to close. |
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Revision: v2.1.22
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* <p> |
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* When the runtime receives information that the application is closing |
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Revision: v2.1.22
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* (either from the application itself or from the system) the runtime |
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Revision: v2.1.22
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* will send a notification to all registered listeners by calling |
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Revision: v2.1.22
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|
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* {@link ShutdownListener#shuttingDown() shuttingDown} method. All the |
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Revision: v2.1.22
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|
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* calls are made in a loop in one thread, so if some listener blocks the |
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Revision: v2.1.22
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* call the rest of the listeners don't get the notification. |
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Revision: v2.1.22
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* <p> |
78 | 240 |
* There can be more than one listener, but it is recommended that there |
241 |
* is only one listener per component. |
|
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* <p> |
|
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* The implementation stores a strong reference to object which prevents |
|
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* garbage collection of the listener unless the listener is removed. |
|
21
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Revision: v2.1.22
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* |
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* @param listener the new listener. |
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Revision: v2.1.22
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*/ |
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Revision: v2.1.22
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public void addShutdownListener(ShutdownListener listener) |
49 | 249 |
{ |
21
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Revision: v2.1.22
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if (mListeners == null) |
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{ |
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mListeners = new Vector(); |
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Revision: v2.1.22
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} |
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Revision: v2.1.22
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mListeners.addElement(listener); |
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Revision: v2.1.22
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} |
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Revision: v2.1.22
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|
256 |
|
78 | 257 |
/** |
258 |
* Removes the registered shutdown listener. |
|
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* |
|
260 |
* @param listener the listener to be removed. If the listener is not |
|
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* found nothing happens. If the key is null, a |
|
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* @throws NullPointerException if the listener is null. |
|
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*/ |
|
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public void removeShutdownListener(ShutdownListener listener) |
|
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{ |
|
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if (listener == null) |
|
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{ |
|
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throw new |
|
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NullPointerException("Listener was null when trying to remove"); |
|
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} |
|
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if (mListeners != null) |
|
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{ |
|
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mListeners.removeElement(listener); |
|
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} |
|
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} |
|
21
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276 |
|
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Revision: v2.1.22
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/** |
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Revision: v2.1.22
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* Waits (if needed) until the application to be started is known. |
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Revision: v2.1.22
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* This method can be used for pre-warming features. If the runtime is in |
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Revision: v2.1.22
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* pre-warmed state where the application to be launched is not yet known, |
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Revision: v2.1.22
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|
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* this method will block. It is safe to call this method if the application |
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Revision: v2.1.22
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|
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* is already known - in that case the method won't block. Once the |
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Revision: v2.1.22
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|
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* application is known all the waiters will be released. Knowing the |
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Revision: v2.1.22
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* application doesn't necessarily mean that the application it self |
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Revision: v2.1.22
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* has been created (might happen later). The method will provide info |
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Revision: v2.1.22
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|
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* whether to continue or cancel the start up as a return value. |
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Revision: v2.1.22
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|
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* @return true if the user should continue starting, otherwise the user |
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Revision: v2.1.22
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|
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* should do the required shut down proceures. |
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Revision: v2.1.22
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|
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*/ |
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Revision: v2.1.22
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public boolean waitStart() |
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Revision: v2.1.22
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{ |
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Revision: v2.1.22
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synchronized (mApplicationStartLock) |
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Revision: v2.1.22
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|
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{ |
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Revision: v2.1.22
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if (mStartCmd == null) |
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Revision: v2.1.22
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{ |
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Revision: v2.1.22
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try |
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Revision: v2.1.22
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|
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{ |
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Revision: v2.1.22
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mApplicationStartLock.wait(); |
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Revision: v2.1.22
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|
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} |
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Revision: v2.1.22
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|
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catch (InterruptedException ie) |
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Revision: v2.1.22
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|
301 |
{ |
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Revision: v2.1.22
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|
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} |
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Revision: v2.1.22
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|
303 |
} |
2a9601315dfc
Revision: v2.1.22
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|
304 |
return mStartCmd == null ? false : mStartCmd.booleanValue(); |
2a9601315dfc
Revision: v2.1.22
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parents:
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|
305 |
} |
2a9601315dfc
Revision: v2.1.22
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parents:
diff
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|
306 |
} |
2a9601315dfc
Revision: v2.1.22
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parents:
diff
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|
307 |
|
2a9601315dfc
Revision: v2.1.22
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parents:
diff
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|
308 |
/** |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
309 |
* Can be used to inform the runtime to pause the running application. The |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
310 |
* origin could be e.g. flip close or application going to back ground. |
2a9601315dfc
Revision: v2.1.22
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parents:
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|
311 |
*/ |
2a9601315dfc
Revision: v2.1.22
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parents:
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|
312 |
public void pauseApplication() |
2a9601315dfc
Revision: v2.1.22
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parents:
diff
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|
313 |
{ |
2a9601315dfc
Revision: v2.1.22
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|
314 |
// Empty implementation as default. |
2a9601315dfc
Revision: v2.1.22
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parents:
diff
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|
315 |
} |
2a9601315dfc
Revision: v2.1.22
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parents:
diff
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|
316 |
|
2a9601315dfc
Revision: v2.1.22
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parents:
diff
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|
317 |
/** |
2a9601315dfc
Revision: v2.1.22
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parents:
diff
changeset
|
318 |
* Can be used to inform the runtime to resume the paused application. The |
2a9601315dfc
Revision: v2.1.22
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parents:
diff
changeset
|
319 |
* origin could be e.g. flip open or application going to fore ground. |
2a9601315dfc
Revision: v2.1.22
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parents:
diff
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|
320 |
*/ |
2a9601315dfc
Revision: v2.1.22
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parents:
diff
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|
321 |
public void resumeApplication() |
2a9601315dfc
Revision: v2.1.22
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parents:
diff
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|
322 |
{ |
2a9601315dfc
Revision: v2.1.22
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parents:
diff
changeset
|
323 |
// Empty implementation as default. |
2a9601315dfc
Revision: v2.1.22
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parents:
diff
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|
324 |
} |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
325 |
|
2a9601315dfc
Revision: v2.1.22
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parents:
diff
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|
326 |
/** |
2a9601315dfc
Revision: v2.1.22
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parents:
diff
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|
327 |
* Releases the start waiters. |
2a9601315dfc
Revision: v2.1.22
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parents:
diff
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|
328 |
*/ |
2a9601315dfc
Revision: v2.1.22
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parents:
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|
329 |
protected void releaseStartWaiter(boolean doStart) |
2a9601315dfc
Revision: v2.1.22
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parents:
diff
changeset
|
330 |
{ |
2a9601315dfc
Revision: v2.1.22
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parents:
diff
changeset
|
331 |
if (mApplicationStartLock != null) |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
332 |
{ |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
333 |
synchronized (mApplicationStartLock) |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
334 |
{ |
2a9601315dfc
Revision: v2.1.22
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parents:
diff
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|
335 |
mStartCmd = new Boolean(doStart); |
2a9601315dfc
Revision: v2.1.22
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parents:
diff
changeset
|
336 |
mApplicationStartLock.notifyAll(); |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
337 |
} |
2a9601315dfc
Revision: v2.1.22
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parents:
diff
changeset
|
338 |
} |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
339 |
} |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
340 |
|
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
341 |
/** |
2a9601315dfc
Revision: v2.1.22
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
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* Sends shutdown notification to all the registered listeners. |
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Revision: v2.1.22
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*/ |
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Revision: v2.1.22
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protected void doShutdown() |
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{ |
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if (mListeners != null) |
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{ |
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Enumeration enumer = mListeners.elements(); |
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while (enumer.hasMoreElements()) |
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{ |
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ShutdownListener listener = |
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Revision: v2.1.22
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(ShutdownListener)enumer.nextElement(); |
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listener.shuttingDown(); |
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Revision: v2.1.22
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} |
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} |
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} |
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} |