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Java > Open Source Codes > org > apache > james > imapserver > commands > SetArgument


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17
18 package org.apache.james.imapserver.commands;
19
20 import java.util.ArrayList JavaDoc;
21 import java.util.List JavaDoc;
22 import java.util.StringTokenizer JavaDoc;
23
24 final class SetArgument implements ImapArgument
25 {
26     public Object JavaDoc parse( StringTokenizer JavaDoc tokens ) throws Exception JavaDoc
27     {
28         if ( !tokens.hasMoreTokens() ) {
29             throw new Exception JavaDoc( "Missing argument " + format() );
30         }
31
32         return tokens.nextToken();
33     }
34
35     private List JavaDoc parseSet( String JavaDoc rawSet )
36     {
37         List JavaDoc response = new ArrayList JavaDoc();
38
39         int checkComma = rawSet.indexOf( "," );
40         if ( checkComma == -1 ) {
41             // No comma present
42 int checkColon = rawSet.indexOf( ":" );
43             if ( checkColon == -1 ) {
44                 // No colon present (single integer)
45 Integer JavaDoc seqNum;
46                 if ( rawSet.equals( "*" ) ) {
47                     seqNum = new Integer JavaDoc( -1 );
48                 }
49                 else {
50                     seqNum = new Integer JavaDoc( rawSet.trim() );
51                     if ( seqNum.intValue() < 1 ) {
52                         throw new IllegalArgumentException JavaDoc( "Not a positive integer" );
53                     }
54                 }
55                 response.add( seqNum );
56             }
57             else {
58                 // Simple sequence
59
60                 // Add the first number in the range.
61 Integer JavaDoc firstNum = new Integer JavaDoc( rawSet.substring( 0, checkColon ) );
62                 int first = firstNum.intValue();
63                 if ( first < 1 ) {
64                     throw new IllegalArgumentException JavaDoc( "Not a positive integer" );
65                 }
66                 response.add( firstNum );
67
68                 Integer JavaDoc lastNum;
69                 int last;
70                 if ( rawSet.indexOf( "*" ) != -1 ) {
71                     // Range from firstNum to '*'
72 // Add -1, to indicate unended range.
73 lastNum = new Integer JavaDoc( -1 );
74                 }
75                 else {
76                     // Get the final num, and add all numbers in range.
77 lastNum = new Integer JavaDoc( rawSet.substring( checkColon + 1 ) );
78                     last = lastNum.intValue();
79                     if ( last < 1 ) {
80                         throw new IllegalArgumentException JavaDoc( "Not a positive integer" );
81                     }
82                     if ( last < first ) {
83                         throw new IllegalArgumentException JavaDoc( "Not an increasing range" );
84                     }
85
86                     for ( int i = (first + 1); i <= last; i++ ) {
87                         response.add( new Integer JavaDoc( i ) );
88                     }
89                 }
90             }
91
92         }
93         else {
94             // Comma present, compound range.
95 try {
96                 String JavaDoc firstRawSet = rawSet.substring( 0, checkComma );
97                 String JavaDoc secondRawSet = rawSet.substring( checkComma + 1 );
98                 response.addAll( parseSet( firstRawSet ) );
99                 response.addAll( parseSet( secondRawSet ) );
100             }
101             catch ( IllegalArgumentException JavaDoc e ) {
102                 throw e;
103             }
104         }
105         return response;
106
107     }
108
109     public String JavaDoc format()
110     {
111         return "<set>";
112     }
113
114 }
115
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