| /* |
| * Copyright (c) 2004, 2008, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package sun.net; |
| |
| import java.io.*; |
| import java.security.AccessController; |
| import java.security.PrivilegedAction; |
| import java.util.Properties; |
| |
| /* |
| * This class allows for centralized access to Networking properties. |
| * Default values are loaded from the file jre/lib/net.properties |
| * |
| * |
| * @author Jean-Christophe Collet |
| * |
| */ |
| |
| public class NetProperties { |
| private static Properties props = new Properties(); |
| static { |
| AccessController.doPrivileged( |
| new PrivilegedAction<Void>() { |
| public Void run() { |
| loadDefaultProperties(); |
| return null; |
| }}); |
| } |
| |
| private NetProperties() { }; |
| |
| |
| /* |
| * Loads the default networking system properties |
| * the file is in jre/lib/net.properties |
| */ |
| private static void loadDefaultProperties() { |
| String fname = System.getProperty("java.home"); |
| if (fname == null) { |
| throw new Error("Can't find java.home ??"); |
| } |
| try { |
| File f = new File(fname, "conf"); |
| f = new File(f, "net.properties"); |
| fname = f.getCanonicalPath(); |
| InputStream in = new FileInputStream(fname); |
| BufferedInputStream bin = new BufferedInputStream(in); |
| props.load(bin); |
| bin.close(); |
| } catch (Exception e) { |
| // Do nothing. We couldn't find or access the file |
| // so we won't have default properties... |
| } |
| } |
| |
| /** |
| * Get a networking system property. If no system property was defined |
| * returns the default value, if it exists, otherwise returns |
| * <code>null</code>. |
| * @param key the property name. |
| * @throws SecurityException if a security manager exists and its |
| * <code>checkPropertiesAccess</code> method doesn't allow access |
| * to the system properties. |
| * @return the <code>String</code> value for the property, |
| * or <code>null</code> |
| */ |
| public static String get(String key) { |
| String def = props.getProperty(key); |
| try { |
| return System.getProperty(key, def); |
| } catch (IllegalArgumentException e) { |
| } catch (NullPointerException e) { |
| } |
| return null; |
| } |
| |
| /** |
| * Get an Integer networking system property. If no system property was |
| * defined returns the default value, if it exists, otherwise returns |
| * <code>null</code>. |
| * @param key the property name. |
| * @param defval the default value to use if the property is not found |
| * @throws SecurityException if a security manager exists and its |
| * <code>checkPropertiesAccess</code> method doesn't allow access |
| * to the system properties. |
| * @return the <code>Integer</code> value for the property, |
| * or <code>null</code> |
| */ |
| public static Integer getInteger(String key, int defval) { |
| String val = null; |
| |
| try { |
| val = System.getProperty(key, props.getProperty(key)); |
| } catch (IllegalArgumentException e) { |
| } catch (NullPointerException e) { |
| } |
| |
| if (val != null) { |
| try { |
| return Integer.decode(val); |
| } catch (NumberFormatException ex) { |
| } |
| } |
| return defval; |
| } |
| |
| /** |
| * Get a Boolean networking system property. If no system property was |
| * defined returns the default value, if it exists, otherwise returns |
| * <code>null</code>. |
| * @param key the property name. |
| * @throws SecurityException if a security manager exists and its |
| * <code>checkPropertiesAccess</code> method doesn't allow access |
| * to the system properties. |
| * @return the <code>Boolean</code> value for the property, |
| * or <code>null</code> |
| */ |
| public static Boolean getBoolean(String key) { |
| String val = null; |
| |
| try { |
| val = System.getProperty(key, props.getProperty(key)); |
| } catch (IllegalArgumentException e) { |
| } catch (NullPointerException e) { |
| } |
| |
| if (val != null) { |
| try { |
| return Boolean.valueOf(val); |
| } catch (NumberFormatException ex) { |
| } |
| } |
| return null; |
| } |
| |
| } |