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1
23 package org.archive.util.ms;
24
25 import java.io.IOException  ;
26 import java.nio.ByteBuffer ;
27 import java.nio.ByteOrder ;
28 import java.util.ArrayList ;
29 import java.util.List ;
30
31 import org.archive.util.IoUtils;
32 import org.archive.io.SeekInputStream;
33
34 class DefaultEntry implements Entry {
35
36
37 private DefaultBlockFileSystem origin;
38 private String name;
39 private EntryType type;
40 private int previous;
41 private int next;
42 private int child;
43 private int startBlock;
44 private int size;
45 private int index;
46
47
48 public DefaultEntry(DefaultBlockFileSystem origin, SeekInputStream input, int index)
49 throws IOException {
50 this.index = index;
51 this.origin = origin;
53 byte[] temp = new byte[128];
54 IoUtils.readFully(input, temp);
55 ByteBuffer buf = ByteBuffer.wrap(temp);
56 buf.order(ByteOrder.LITTLE_ENDIAN);
57 buf.position(0);
58
59 StringBuilder nameBuf = new StringBuilder ();
60
61 char ch = buf.getChar();
62 while (ch != 0) {
63 nameBuf.append(ch);
64 ch = buf.getChar();
65 }
66 this.name = nameBuf.toString();
67
68 byte typeFlag = buf.get(0x42);
69 switch (typeFlag) {
70 case 1:
71 this.type = EntryType.DIRECTORY;
72 break;
73 case 2:
74 this.type = EntryType.FILE;
75 break;
76 case 5:
77 this.type = EntryType.ROOT;
78 break;
79 default:
80 throw new IllegalStateException ("Invalid type: " + typeFlag);
81 }
82
83 this.previous = buf.getInt(0x44);
84 this.next = buf.getInt(0x48);
85 this.child = buf.getInt(0x4C);
86 this.startBlock = buf.getInt(0x74);
87 this.size = buf.getInt(0x78);
88 }
89
90
91 public String getName() {
92 return name;
93 }
94
95
96 public EntryType getType() {
97 return type;
98 }
99
100
101 public Entry getNext() throws IOException {
102 return origin.getEntry(next);
103 }
104
105
106 public Entry getPrevious() throws IOException {
107 return origin.getEntry(previous);
108 }
109
110
111 public Entry getChild() throws IOException {
112 return origin.getEntry(child);
113 }
114
115 public SeekInputStream open() throws IOException {
116 return new BlockInputStream(origin, startBlock);
117 }
118
119
120 public List <Entry> list() throws IOException {
121 if (child < 0) {
122 throw new IllegalStateException ("Can't list non-directory.");
123 }
124 Entry child = getChild();
125 ArrayList <Entry> r = new ArrayList <Entry>();
126 list(r, child);
127 return r;
128 }
129
130
131 public static void list(List <Entry> list, Entry e) throws IOException {
132 if (e == null) {
133 return;
134 }
135 list.add(e);
136 list(list, e.getPrevious());
137 list(list, e.getNext());
138 }
139
140
141 public int getIndex() {
142 return index;
143 }
144
145
146 public String toString() {
147 StringBuilder result = new StringBuilder ("Entry{");
148 result.append("name=").append(name);
149 result.append(" index=").append(index);
150 result.append(" type=").append(type);
151 result.append(" size=").append(size);
152 result.append(" prev=").append(previous);
153 result.append(" next=").append(next);
154 result.append(" child=").append(child);
155 result.append(" startBlock=").append(startBlock);
156 result.append("}");
157 return result.toString();
158 }
159
160
161 }
162 |
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