1 // 2016 and later: Unicode, Inc. and others. 2 // License & terms of use: http://www.unicode.org/copyright.html#License 3 /* 4 ******************************************************************************* 5 * Copyright (C) 2008-2015, International Business Machines Corporation and 6 * others. All Rights Reserved. 7 ******************************************************************************* 8 */ 9 package com.ibm.icu.impl; 10 11 import java.io.IOException; 12 import java.io.InputStream; 13 import java.security.AccessControlException; 14 import java.security.AccessController; 15 import java.security.PrivilegedAction; 16 import java.util.MissingResourceException; 17 import java.util.Properties; 18 19 /** 20 * ICUConfig is a class used for accessing ICU4J runtime configuration. 21 */ 22 public class ICUConfig { 23 public static final String CONFIG_PROPS_FILE = "/com/ibm/icu/ICUConfig.properties"; 24 private static final Properties CONFIG_PROPS; 25 26 static { 27 CONFIG_PROPS = new Properties(); 28 try { 29 InputStream is = ICUData.getStream(CONFIG_PROPS_FILE); 30 if (is != null) { 31 try { 32 CONFIG_PROPS.load(is); 33 } finally { 34 is.close(); 35 } 36 } 37 } catch (MissingResourceException mre) { 38 // If it does not exist, ignore. 39 } catch (IOException ioe) { 40 // Any IO errors, ignore 41 } 42 } 43 44 /** 45 * Get ICU configuration property value for the given name. 46 * @param name The configuration property name 47 * @return The configuration property value, or null if it does not exist. 48 */ 49 public static String get(String name) { 50 return get(name, null); 51 } 52 53 /** 54 * Get ICU configuration property value for the given name. 55 * @param name The configuration property name 56 * @param def The default value 57 * @return The configuration property value. If the property does not 58 * exist, <code>def</code> is returned. 59 */ 60 public static String get(String name, String def) { 61 String val = null; 62 final String fname = name; 63 if (System.getSecurityManager() != null) { 64 try { 65 val = AccessController.doPrivileged(new PrivilegedAction<String>() { 66 @Override 67 public String run() { 68 return System.getProperty(fname); 69 } 70 }); 71 } catch (AccessControlException e) { 72 // ignore 73 // TODO log this message 74 } 75 } else { 76 val = System.getProperty(name); 77 } 78 79 if (val == null) { 80 val = CONFIG_PROPS.getProperty(name, def); 81 } 82 return val; 83 } 84 } 85
