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Java > Open Source Codes > edu > rice > cs > drjava > config > SavableConfiguration


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33
34 package edu.rice.cs.drjava.config;
35
36 import java.io.*;
37 import java.util.Iterator JavaDoc;
38 import java.util.Date JavaDoc;
39
40 /** A Configuration object that can be read and saved from a Stream.
41  * @version $Id: SavableConfiguration.java 3903 2006-07-05 20:03:06Z rcartwright $
42  */
43 public class SavableConfiguration extends Configuration {
44   /**
45    * Creates a new Configuration based on the given OptionMap.
46    * @param map an empty OptionMap
47    */
48   public SavableConfiguration(OptionMap map) { super(map); }
49
50   /**
51    * Creates an OptionMapLoader with the values loaded from the InputStream
52    * (and defaults where values weren't specified) and loads them into
53    * this Configuration's OptionMap.
54    * @param is InputStream containing properties-style keys and values
55    */
56   public void loadConfiguration(InputStream is) throws IOException {
57     new OptionMapLoader(is).loadInto(map);
58   }
59
60   /**
61    * Used to save the values from this Configuration into the given OutputStream
62    * as a Properties file. The elements weren't ordered, so now the properties
63    * are written in the same way as the about dialog.
64    * Values equal to their defaults are not written to disk.
65    */
66   public void saveConfiguration(OutputStream os, String JavaDoc header) throws IOException {
67     Writer w = new BufferedWriter(new OutputStreamWriter(os));
68     Iterator JavaDoc<OptionParser<?>> keys = map.keys();
69     //Properties p = new Properties();
70 // String tmpString;
71 // StringBuffer buff;
72 // OptionParser<?> key;
73
74     // Write the header
75 Date JavaDoc date = new Date JavaDoc();
76     w.write((int)'#');
77     w.write(header, 0, header.length());
78     w.write((int)'\n');
79     w.write((int)'#');
80     w.write(date.toString(), 0, date.toString().length());
81     w.write((int)'\n');
82
83     // Write each option
84 while (keys.hasNext()) {
85       
86       OptionParser<?> key = keys.next();
87
88       if (!key.getDefault().equals(map.getOption(key))) {
89
90         // Write name
91 String JavaDoc tmpString = key.getName();
92         w.write(tmpString, 0, tmpString.length());
93
94         // Write equals sign
95 tmpString = " = ";
96         w.write(tmpString, 0, 3);
97
98         // Write value
99 tmpString = map.getString(key);
100         // This replaces all backslashes with two backslashes for windows
101 int index = 0;
102         int pos;
103         while (index < tmpString.length() &&
104                ((pos = tmpString.indexOf('\\', index)) >= 0)) {
105           final StringBuilder JavaDoc buff = new StringBuilder JavaDoc(tmpString); // should use StringBuilder, but not 1.4 compatible
106 buff.insert(pos, '\\');
107           index = pos + 2;
108           tmpString = buff.toString();
109         }
110         w.write(tmpString, 0, tmpString.length());
111         w.write((int)'\n');
112
113         // p.setProperty(key.getName(),map.getString(key));
114 }
115     }
116     w.close();
117     //p.store(os,header)
118 }
119 }
120
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