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My first initial commit with all of mine experimental changes.

Dmitry Kabak (userdima committed 13 years ago

Commit d37b88d1 parent 3f5b46618352 files · +2598093 −-8690Browse files

Showing the changes to java/pkg/sun/net/NetProperties.java (1 of 18352 files). Show all

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java/pkg/sun/net/NetProperties.java+158−0
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1+/*
2+ * Copyright (c) 2004, 2008, Oracle and/or its affiliates. All rights reserved.
3+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4+ *
5+ * This code is free software; you can redistribute it and/or modify it
6+ * under the terms of the GNU General Public License version 2 only, as
7+ * published by the Free Software Foundation. Oracle designates this
8+ * particular file as subject to the "Classpath" exception as provided
9+ * by Oracle in the LICENSE file that accompanied this code.
10+ *
11+ * This code is distributed in the hope that it will be useful, but WITHOUT
12+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14+ * version 2 for more details (a copy is included in the LICENSE file that
15+ * accompanied this code).
16+ *
17+ * You should have received a copy of the GNU General Public License version
18+ * 2 along with this work; if not, write to the Free Software Foundation,
19+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20+ *
21+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22+ * or visit www.oracle.com if you need additional information or have any
23+ * questions.
24+ */
25+package sun.net;
26+
27+import java.io.*;
28+import java.security.AccessController;
29+import java.security.PrivilegedAction;
30+import java.util.Properties;
31+
32+/*
33+ * This class allows for centralized access to Networking properties.
34+ * Default values are loaded from the file jre/lib/net.properties
35+ *
36+ *
37+ * @author Jean-Christophe Collet
38+ *
39+ */
40+
41+public class NetProperties {
42+ static private Properties props = new Properties();
43+ static {
44+ AccessController.doPrivileged(
45+ new PrivilegedAction<Void>() {
46+ public Void run() {
47+ loadDefaultProperties();
48+ return null;
49+ }});
50+ }
51+
52+ private NetProperties() { };
53+
54+
55+ /*
56+ * Loads the default networking system properties
57+ * the file is in jre/lib/net.properties
58+ */
59+ static private void loadDefaultProperties() {
60+ String fname = System.getProperty("java.home");
61+ if (fname == null) {
62+ throw new Error("Can't find java.home ??");
63+ }
64+ try {
65+ File f = new File(fname, "lib");
66+ f = new File(f, "net.properties");
67+ fname = f.getCanonicalPath();
68+ InputStream in = new FileInputStream(fname);
69+ BufferedInputStream bin = new BufferedInputStream(in);
70+ props.load(bin);
71+ bin.close();
72+ } catch (Exception e) {
73+ // Do nothing. We couldn't find or access the file
74+ // so we won't have default properties...
75+ }
76+ }
77+
78+ /**
79+ * Get a networking system property. If no system property was defined
80+ * returns the default value, if it exists, otherwise returns
81+ * <code>null</code>.
82+ * @param key the property name.
83+ * @throws SecurityException if a security manager exists and its
84+ * <code>checkPropertiesAccess</code> method doesn't allow access
85+ * to the system properties.
86+ * @return the <code>String</code> value for the property,
87+ * or <code>null</code>
88+ */
89+ static public String get(String key) {
90+ String def = props.getProperty(key);
91+ try {
92+ return System.getProperty(key, def);
93+ } catch (IllegalArgumentException e) {
94+ } catch (NullPointerException e) {
95+ }
96+ return null;
97+ }
98+
99+ /**
100+ * Get an Integer networking system property. If no system property was
101+ * defined returns the default value, if it exists, otherwise returns
102+ * <code>null</code>.
103+ * @param key the property name.
104+ * @param defval the default value to use if the property is not found
105+ * @throws SecurityException if a security manager exists and its
106+ * <code>checkPropertiesAccess</code> method doesn't allow access
107+ * to the system properties.
108+ * @return the <code>Integer</code> value for the property,
109+ * or <code>null</code>
110+ */
111+ static public Integer getInteger(String key, int defval) {
112+ String val = null;
113+
114+ try {
115+ val = System.getProperty(key, props.getProperty(key));
116+ } catch (IllegalArgumentException e) {
117+ } catch (NullPointerException e) {
118+ }
119+
120+ if (val != null) {
121+ try {
122+ return Integer.decode(val);
123+ } catch (NumberFormatException ex) {
124+ }
125+ }
126+ return new Integer(defval);
127+ }
128+
129+ /**
130+ * Get a Boolean networking system property. If no system property was
131+ * defined returns the default value, if it exists, otherwise returns
132+ * <code>null</code>.
133+ * @param key the property name.
134+ * @throws SecurityException if a security manager exists and its
135+ * <code>checkPropertiesAccess</code> method doesn't allow access
136+ * to the system properties.
137+ * @return the <code>Boolean</code> value for the property,
138+ * or <code>null</code>
139+ */
140+ static public Boolean getBoolean(String key) {
141+ String val = null;
142+
143+ try {
144+ val = System.getProperty(key, props.getProperty(key));
145+ } catch (IllegalArgumentException e) {
146+ } catch (NullPointerException e) {
147+ }
148+
149+ if (val != null) {
150+ try {
151+ return Boolean.valueOf(val);
152+ } catch (NumberFormatException ex) {
153+ }
154+ }
155+ return null;
156+ }
157+
158+}