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1
52
53 package freemarker.template.utility;
54
55 import java.security.AccessControlException  ;
56 import java.security.AccessController ;
57 import java.security.PrivilegedAction ;
58
59 import freemarker.log.Logger;
60
61
65 public class SecurityUtilities
66 {
67 private static final Logger logger = Logger.getLogger("freemarker.security");
68 private SecurityUtilities()
69 {
70 }
71
72 public static String getSystemProperty(final String key)
73 {
74 return (String ) AccessController.doPrivileged(
75 new PrivilegedAction ()
76 {
77 public Object run()
78 {
79 return System.getProperty(key);
80 }
81 });
82 }
83
84 public static String getSystemProperty(final String key, final String defValue)
85 {
86 try
87 {
88 return (String ) AccessController.doPrivileged(
89 new PrivilegedAction ()
90 {
91 public Object run()
92 {
93 return System.getProperty(key, defValue);
94 }
95 });
96 }
97 catch(AccessControlException e)
98 {
99 logger.warn("Insufficient permissions to read system property '" +
100 key + "', using default value '" + defValue + "'");
101 return defValue;
102 }
103 }
104
105 public static Integer getSystemProperty(final String key, final int defValue)
106 {
107 try
108 {
109 return (Integer ) AccessController.doPrivileged(
110 new PrivilegedAction ()
111 {
112 public Object run()
113 {
114 return Integer.getInteger(key, defValue);
115 }
116 });
117 }
118 catch(AccessControlException e)
119 {
120 logger.warn("Insufficient permissions to read system property '" +
121 key + "', using default value " + defValue + "");
122 return new Integer (defValue);
123 }
124 }
125 }
126 |
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Java API By Example, From Geeks To Geeks.