1 /*
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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
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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
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24  */
25 
26 package com.sun.corba.se.impl.resolver ;
27 
28 import org.omg.CORBA.ORBPackage.InvalidName;
29 
30 import com.sun.corba.se.spi.resolver.Resolver ;
31 
32 import java.util.Enumeration;
33 import java.util.Properties;
34 import java.util.Set;
35 import java.util.HashSet;
36 
37 import java.io.File;
38 import java.io.FileInputStream;
39 
40 import com.sun.corba.se.spi.orb.ORB ;
41 
42 import com.sun.corba.se.impl.orbutil.CorbaResourceUtil ;
43 
44 public class FileResolverImpl implements Resolver
45 {
46     private ORB orb ;
47     private File file ;
48     private Properties savedProps ;
49     private long fileModified = 0 ;
50 
FileResolverImpl( ORB orb, File file )51     public FileResolverImpl( ORB orb, File file )
52     {
53         this.orb = orb ;
54         this.file = file ;
55         savedProps = new Properties() ;
56     }
57 
resolve( String name )58     public org.omg.CORBA.Object resolve( String name )
59     {
60         check() ;
61         String stringifiedObject = savedProps.getProperty( name ) ;
62         if (stringifiedObject == null) {
63             return null;
64         }
65         return orb.string_to_object( stringifiedObject ) ;
66     }
67 
list()68     public java.util.Set list()
69     {
70         check() ;
71 
72         Set result = new HashSet() ;
73 
74         // Obtain all the keys from the property object
75         Enumeration theKeys = savedProps.propertyNames();
76         while (theKeys.hasMoreElements()) {
77             result.add( theKeys.nextElement() ) ;
78         }
79 
80         return result ;
81     }
82 
83     /**
84     * Checks the lastModified() timestamp of the file and optionally
85     * re-reads the Properties object from the file if newer.
86     */
check()87     private void check()
88     {
89         if (file == null)
90             return;
91 
92         long lastMod = file.lastModified();
93         if (lastMod > fileModified) {
94             try {
95                 FileInputStream fileIS = new FileInputStream(file);
96                 savedProps.clear();
97                 savedProps.load(fileIS);
98                 fileIS.close();
99                 fileModified = lastMod;
100             } catch (java.io.FileNotFoundException e) {
101                 System.err.println( CorbaResourceUtil.getText(
102                     "bootstrap.filenotfound", file.getAbsolutePath()));
103             } catch (java.io.IOException e) {
104                 System.err.println( CorbaResourceUtil.getText(
105                     "bootstrap.exception",
106                     file.getAbsolutePath(), e.toString()));
107             }
108         }
109     }
110 }
111