1 /*
2 * Copyright (c) 2015, 2016, 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 jdk.xml.internal;
26
27 import java.io.File;
28 import java.io.FileInputStream;
29 import java.io.FileNotFoundException;
30 import java.io.IOException;
31 import java.io.InputStream;
32 import java.security.AccessController;
33 import java.security.PrivilegedAction;
34 import java.security.PrivilegedActionException;
35 import java.security.PrivilegedExceptionAction;
36 import java.text.MessageFormat;
37 import java.util.Locale;
38 import java.util.Properties;
39 import java.util.ResourceBundle;
40
41 /**
42 * This class contains utility methods for reading resources in the JAXP packages
43 */
44 public class SecuritySupport {
45 /**
46 * Cache for properties in java.home/conf/jaxp.properties
47 */
48 static final Properties cacheProps = new Properties();
49
50 /**
51 * Flag indicating whether java.home/conf/jaxp.properties has been read
52 */
53 static volatile boolean firstTime = true;
54
55 private SecuritySupport() {}
56
57 public static String getErrorMessage(Locale locale, String bundle, String key,
58 Object[] arguments) {
59 ResourceBundle rb;
60 if (locale != null) {
61 rb = ResourceBundle.getBundle(bundle,locale);
62 } else {
63 rb = ResourceBundle.getBundle(bundle);
64 }
65
66 String msg = rb.getString(key);
67 if (arguments != null) {
68 msg = MessageFormat.format(msg, arguments);
69 }
70 return msg;
71 }
72
73 /**
74 * Reads JAXP system property with privilege
75 *
76 * @param propName the name of the property
77 * @return the value of the property
78 */
79 public static String getSystemProperty(final String propName) {
80 return
81 AccessController.doPrivileged(
82 (PrivilegedAction<String>) () -> (String)System.getProperty(propName));
83 }
84
85 /**
86 * Reads a system property.
87 *
88 * @param <T> the type of the property value
89 * @param type the type of the property value
90 * @param propName the name of the property
91 * @param defValue the default value
92 * @return the value of the property, or the default value of no system
93 * property is found
94 */
95 public static <T> T getJAXPSystemProperty(Class<T> type, String propName, String defValue) {
96 String value = getJAXPSystemProperty(propName);
97 if (value == null) {
98 value = defValue;
99 }
100 if (Integer.class.isAssignableFrom(type)) {
101 return type.cast(Integer.parseInt(value));
102 } else if (Boolean.class.isAssignableFrom(type)) {
103 return type.cast(Boolean.parseBoolean(value));
104 }
105 return type.cast(value);
106 }
107
108 /**
109 * Reads JAXP system property in this order: system property,
110 * $java.home/conf/jaxp.properties if the system property is not specified
111 *
112 * @param propName the name of the property
113 * @return the value of the property
114 */
115 public static String getJAXPSystemProperty(String propName) {
116 String value = getSystemProperty(propName);
117 if (value == null) {
118 value = readJAXPProperty(propName);
119 }
120 return value;
121 }
122
123 /**
124 * Reads the specified property from $java.home/conf/jaxp.properties
125 *
126 * @param propName the name of the property
127 * @return the value of the property
128 */
129 public static String readJAXPProperty(String propName) {
130 String value = null;
131 InputStream is = null;
132 try {
133 if (firstTime) {
134 synchronized (cacheProps) {
135 if (firstTime) {
136 String configFile = getSystemProperty("java.home") + File.separator
137 + "conf" + File.separator + "jaxp.properties";
138 File f = new File(configFile);
139 if (getFileExists(f)) {
140 is = getFileInputStream(f);
141 cacheProps.load(is);
142 }
143 firstTime = false;
144 }
145 }
146 }
147 value = cacheProps.getProperty(propName);
148
149 } catch (IOException ex) {
150 } finally {
151 if (is != null) {
152 try {
153 is.close();
154 } catch (IOException ex) {}
155 }
156 }
157
158 return value;
159 }
160
161 //------------------- private methods ---------------------------
162 static boolean getFileExists(final File f) {
163 return (AccessController.doPrivileged((PrivilegedAction<Boolean>) ()
164 -> f.exists() ? Boolean.TRUE : Boolean.FALSE));
165 }
166
167 static FileInputStream getFileInputStream(final File file)
168 throws FileNotFoundException {
169 try {
170 return AccessController.doPrivileged((PrivilegedExceptionAction<FileInputStream>) ()
171 -> new FileInputStream(file));
172 } catch (PrivilegedActionException e) {
173 throw (FileNotFoundException) e.getException();
174 }
175 }
176 }