author | chegar |
Fri, 18 Oct 2019 21:25:01 +0100 | |
branch | datagramsocketimpl-branch |
changeset 58697 | e3ff12d14d43 |
parent 50817 | fa1e04811ff6 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2004, 2008, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package sun.net; |
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import jdk.internal.util.StaticProperty; |
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import java.io.*; |
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import java.security.AccessController; |
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import java.security.PrivilegedAction; |
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import java.util.Properties; |
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/* |
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* This class allows for centralized access to Networking properties. |
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* Default values are loaded from the file jre/lib/net.properties |
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* |
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* |
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* @author Jean-Christophe Collet |
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* |
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*/ |
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public class NetProperties { |
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private static Properties props = new Properties(); |
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static { |
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AccessController.doPrivileged( |
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new PrivilegedAction<Void>() { |
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public Void run() { |
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loadDefaultProperties(); |
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return null; |
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}}); |
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} |
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private NetProperties() { }; |
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/* |
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* Loads the default networking system properties |
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* the file is in jre/lib/net.properties |
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*/ |
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private static void loadDefaultProperties() { |
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String fname = StaticProperty.javaHome(); |
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if (fname == null) { |
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throw new Error("Can't find java.home ??"); |
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} |
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try { |
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File f = new File(fname, "conf"); |
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f = new File(f, "net.properties"); |
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fname = f.getCanonicalPath(); |
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InputStream in = new FileInputStream(fname); |
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BufferedInputStream bin = new BufferedInputStream(in); |
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props.load(bin); |
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bin.close(); |
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} catch (Exception e) { |
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// Do nothing. We couldn't find or access the file |
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// so we won't have default properties... |
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} |
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} |
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/** |
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* Get a networking system property. If no system property was defined |
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* returns the default value, if it exists, otherwise returns |
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* <code>null</code>. |
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* @param key the property name. |
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* @throws SecurityException if a security manager exists and its |
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* <code>checkPropertiesAccess</code> method doesn't allow access |
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* to the system properties. |
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* @return the <code>String</code> value for the property, |
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* or <code>null</code> |
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*/ |
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public static String get(String key) { |
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String def = props.getProperty(key); |
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try { |
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return System.getProperty(key, def); |
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} catch (IllegalArgumentException e) { |
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} catch (NullPointerException e) { |
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} |
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return null; |
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} |
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/** |
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* Get an Integer networking system property. If no system property was |
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* defined returns the default value, if it exists, otherwise returns |
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* <code>null</code>. |
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* @param key the property name. |
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* @param defval the default value to use if the property is not found |
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* @throws SecurityException if a security manager exists and its |
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* <code>checkPropertiesAccess</code> method doesn't allow access |
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* to the system properties. |
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* @return the <code>Integer</code> value for the property, |
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* or <code>null</code> |
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*/ |
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public static Integer getInteger(String key, int defval) { |
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String val = null; |
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try { |
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val = System.getProperty(key, props.getProperty(key)); |
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} catch (IllegalArgumentException e) { |
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} catch (NullPointerException e) { |
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} |
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if (val != null) { |
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try { |
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return Integer.decode(val); |
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} catch (NumberFormatException ex) { |
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} |
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} |
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return defval; |
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} |
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/** |
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* Get a Boolean networking system property. If no system property was |
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* defined returns the default value, if it exists, otherwise returns |
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* <code>null</code>. |
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* @param key the property name. |
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* @throws SecurityException if a security manager exists and its |
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* <code>checkPropertiesAccess</code> method doesn't allow access |
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* to the system properties. |
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* @return the <code>Boolean</code> value for the property, |
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* or <code>null</code> |
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*/ |
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public static Boolean getBoolean(String key) { |
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String val = null; |
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try { |
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val = System.getProperty(key, props.getProperty(key)); |
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} catch (IllegalArgumentException e) { |
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} catch (NullPointerException e) { |
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} |
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if (val != null) { |
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try { |
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return Boolean.valueOf(val); |
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} catch (NumberFormatException ex) { |
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} |
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} |
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return null; |
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} |
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} |