config.java

一个小公司要求给写的很简单的任务管理系统。

/*
 * @(#)Config.java	1.7 05/11/30
 * 
 * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * -Redistribution of source code must retain the above copyright notice, this
 *  list of conditions and the following disclaimer.
 * 
 * -Redistribution in binary form must reproduce the above copyright notice, 
 *  this list of conditions and the following disclaimer in the documentation
 *  and/or other materials provided with the distribution.
 * 
 * Neither the name of Sun Microsystems, Inc. or the names of contributors may 
 * be used to endorse or promote products derived from this software without 
 * specific prior written permission.
 * 
 * This software is provided "AS IS," without a warranty of any kind. ALL 
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
 * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST 
 * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, 
 * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY 
 * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, 
 * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 * 
 * You acknowledge that this software is not designed, licensed or intended
 * for use in the design, construction, operation or maintenance of any
 * nuclear facility.
 */
package jnlp.sample.JreInstaller;
import java.util.ResourceBundle;
import java.util.PropertyResourceBundle;
import java.lang.reflect.Field;
import java.net.URL;
import java.util.MissingResourceException;
import java.text.MessageFormat;
import javax.jnlp.ServiceManager;
import javax.jnlp.BasicService;
import javax.jnlp.ExtensionInstallerService;
import javax.jnlp.DownloadService;
import javax.jnlp.UnavailableServiceException;


/** Contains configuration information for an
 *  installer.
 *
 *  Part of the configuration is read as properties
 *  set in the JNLP file - other information is
 *  currently hard-coded as strings - they should
 *  properly be moved to resources.
 *
 */
public class Config {
    
    /** Localization */
    static private ResourceBundle _resources = null;
    
    /** JNLP services */
    static private ExtensionInstallerService _eiService;
    static private BasicService _basicService;
    static private DownloadService _downloadService;
    
    /** Initialize basic services class */
    static private synchronized void initServices() {
        if (_eiService == null) {
	    try {
		_eiService = (ExtensionInstallerService)ServiceManager.lookup("javax.jnlp.ExtensionInstallerService");
		_basicService = (BasicService)ServiceManager.lookup("javax.jnlp.BasicService");
		_downloadService = (DownloadService)ServiceManager.lookup("javax.jnlp.DownloadService");
	    } catch(UnavailableServiceException use) {
		Config.trace("Unable to locate service: " + use);
	    }
        }
	
	// We cannot really use this, since it breaks lazy loading. When resources for all locales
	// are in place it should be ok. Or we need another solution.
	//_resources = ResourceBundle.getBundle("jnlp/JreInstaller/resources/strings");	
	try {
	    URL bundle = (new Config()).getClass().getClassLoader().getResource("jnlp/sample/JreInstaller/resources/strings.properties");	
	    _resources = new PropertyResourceBundle(bundle.openStream());
	} catch(Throwable t) {
	    Config.trace("Unable to load resources: " + t);
	}
    }
    
    static public BasicService getBasicService() {
	if (_basicService == null) {
	    initServices();
	}
	return _basicService;
    }
    
    static public ExtensionInstallerService getInstallService() {
	if (_eiService == null) {
	    initServices();
	}
	return _eiService;
    }
    
    static public DownloadService getDownloadService() {
	if (_downloadService == null) {
	    initServices();
	}
	return _downloadService;
    }
    
    /*
     * Configuration for JNLP file
     */
    
    static public String getJavaWSVersion() {
	return System.getProperty("javawebstart.version");
    }

    // Win/Solaris
    static public String getInstallerResource() {
	return System.getProperty("installerEntry");
    }
    
    static public String getLicenseResource() {
	return System.getProperty("licenseEntry");
    }
    
    // Win/Solaris
    static public String getInstallerLocation() {
	return System.getProperty("installerLocation");
    }
    
    // Win/Solaris
    static public String getInstallerVersion() {
	String ver = System.getProperty("installerVersion");
	return (ver != null && ver.trim().length() == 0) ? null : ver;
    }
    
    // Win-only
    static public String getNativeLibName() {
	return System.getProperty("lib");
    }
    
    // Win/Solaris
    static public String getExecString() {
	return System.getProperty("execString");
    }
    
    // Solaris-only
    static public String getWaitString(int i) {
	return System.getProperty("waitString." + i);
    }
    
    // Solaris-only
    static public String getResponseString(int i) {
	return System.getProperty("responseString." + i);
    }
    
    // Win/Solaris
    static public String getJavaPath() {
	return System.getProperty("javaPath");
    }
    
    // Solaris-only
    static public boolean isSolarisInstall() {
	String result = System.getProperty("isSolarisInstall");
	return (result != null && result.length() > 0);
    }

    static public boolean isWindowsInstall() {
	String result = System.getProperty("isWindowsInstall");
	return (result != null && result.length() > 0);
    }
    
    // Win/Solaris
    static public boolean isVerbose() {
	String result = System.getProperty("verbose");
	return (result != null && result.length() > 0);
    }

    // Win-only
    static public boolean isMerlin() {
	String result = System.getProperty("merlin");
	return (result != null && result.length() > 0);
    }

    // Win-only
    static public boolean isHopper() {
	String result = System.getProperty("hopper");
	return (result != null && result.length() > 0);
    }
    
    // Win-only
    static public String getJavaVersion() {
	return System.getProperty("javaVersion");
    }

    static public String getPlatformVersion() {
	return System.getProperty("platformVersion");
    }
    
    
    // Win-only
    static public String getMsvcrtVersionMS() {
	return System.getProperty("msvcrt.versionMS");
    }
    
    // Win-only
    static public String getMsvcrtVersionLS() {
	return System.getProperty("msvcrt.versionLS");
    }
    
    /*
     *  String resources
     */
    public static String getJavaWSConfirmMessage() {
	return getString("webstart.msg");
    }

    public static String getJavaWSConfirmTitle() {
	return getString("webstart.title");
    }

    public static String getRebootMessage() {
	return getString("reboot.msg");
    }
    
    public static String getRebootTitle() {
	return getString("reboot.title");
    }
    
    public static String getRebootNowString() {
	return getString("reboot.button.now");
    }
    
    public static String getRebootLaterString() {
	return getString("reboot.button.later");
    }                
    
    public static String getLicenseDialogTitle() {
	return getString("license.title");
    }
    
    public static String getLicenseDialogQuestionString() {
	return getString("license.question");
    }
    
    public static String getLicenseDialogAcceptString() {
	return getString("license.button.accept");
    }
    
    public static String getLicenseDialogExitString() {
	return getString("license.button.exit");
    }

    public static String getWindowTitle() {
        return getString("window.title");
    }

    public static String getWindowHeading() {
        return getString("window.heading");
    }

    public static String getWindowLogo() {
        return "resources/sunlogo.png";
    }

    public static String getWindowStep(int i) {
        return getString("window.step." + i);        
    }

    public static String getWindowAbortButton() {
        return getString("window.button.abort");
    }

    public static int getWindowAbortMnemonic() {
        return getMnemonic("window.button.abort.key");
    }
    
    public static String getWindowHiddenLabel() {
        return getString("window.hiddenLabel");
    }
    
    public static String getWindowStepProgress(int step, int percent) {
	Object args[] = { getWindowStep(step), new Integer(percent) };
        return applyPattern("window.step.progress", args);    
    }
    
    public static String getWindowStepWait(int step) {
        Object args[] = { getWindowStep(step) };
        return applyPattern("window.step.wait", args);    
    }
    
    /** Resource bundle stuff */
    
    // Returns a string from the resources    
    static private String getString(String key) {
        try {
	    return _resources.getString(key);
        } catch (MissingResourceException mre) {
	    return "Missing resource for: " + key;            
        }
    }

    static private int getMnemonic(String key) {
        String resource = getString(key);
        if (resource != null && resource.startsWith("VK_")) {
            try {
                Class keyEventClazz= Class.forName("java.awt.event.KeyEvent");                
                Field field = keyEventClazz.getDeclaredField(resource);
                int value = field.getInt(null);
                return value;
            } catch (Exception e) {
                Config.trace("getMnemonic: " + e);
            }
        }
        return 0;        
    }
    
    /** Helper function that applies the messageArguments to a message from the resource object */
    static private String applyPattern(String key, Object[] messageArguments) {
        String message = getString(key);
        MessageFormat formatter = new MessageFormat(message);
        String output = formatter.format(message, messageArguments);
        return output;
    }
    
    /** debugging method. No localized */
    static public void trace(String msg) {
	if (isVerbose()) {
	    System.out.println(msg);
	}
    }
}