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1
21
22 package org.apache.derby.iapi.util;
23
24 import java.util.Properties  ;
25 import java.util.Enumeration ;
26
27
37
38 public final class DoubleProperties extends Properties {
39
40 private final Properties read;
41 private final Properties write;
42
43 public DoubleProperties(Properties read, Properties write) {
44 this.read = read;
45 this.write = write;
46 }
47
48 public Object put(Object key, Object value) {
49 return write.put(key, value);
50 }
51
52 public String getProperty(String key) {
53
54 return read.getProperty(key, write.getProperty(key));
55 }
56
57 public String getProperty(String key, String defaultValue) {
58 return read.getProperty(key, write.getProperty(key, defaultValue));
59
60 }
61
62 public Enumeration propertyNames() {
63
64 Properties p = new Properties ();
65
66 if (write != null) {
67
68 for (Enumeration e = write.propertyNames(); e.hasMoreElements(); ) {
69 String key = (String ) e.nextElement();
70 p.put(key, write.getProperty(key));
71 }
72 }
73
74 if (read != null) {
75 for (Enumeration e = read.propertyNames(); e.hasMoreElements(); ) {
76 String key = (String ) e.nextElement();
77 p.put(key, read.getProperty(key));
78 }
79 }
80 return p.keys();
81 }
82 }
83 |
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