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1
4 package gnu.lists;
5 import java.io.*;
6
7
8
9 public class BitVector extends SimpleVector implements Externalizable
10 {
11 boolean[] data;
12 protected static boolean[] empty = new boolean[0];
13
14 public BitVector ()
15 {
16 data = empty;
17 }
18
19 public BitVector(int size, boolean value)
20 {
21 boolean[] array = new boolean[size];
22 data = array;
23 this.size = size;
24 if (value)
25 {
26 while (--size >= 0)
27 array[size] = true;
28 }
29 }
30
31 public BitVector(int size)
32 {
33 this.data = new boolean[size];
34 this.size = size;
35 }
36
37 public BitVector (boolean[] data)
38 {
39 this.data = data;
40 size = data.length;
41 }
42
43 public BitVector(Sequence seq)
44 {
45 data = new boolean[seq.size()];
46 addAll(seq);
47 }
48
49
50 public int getBufferLength()
51 {
52 return data.length;
53 }
54
55 public void setBufferLength(int length)
56 {
57 int oldLength = data.length;
58 if (oldLength != length)
59 {
60 boolean[] tmp = new boolean[length];
61 System.arraycopy(data, 0, tmp, 0,
62 oldLength < length ? oldLength : length);
63 data = tmp;
64 }
65 }
66
67 protected Object  getBuffer() { return data; }
68
69 public final boolean booleanAt(int index)
70 {
71 if (index > size)
72 throw new IndexOutOfBoundsException ();
73 return data[index];
74 }
75
76 public final boolean booleanAtBuffer(int index)
77 {
78 return data[index];
79 }
80
81 public final Object get(int index)
82 {
83 if (index > size)
84 throw new IndexOutOfBoundsException ();
85 return Convert.toObject(data[index]);
86 }
87
88 public final Object getBuffer(int index)
89 {
90 return Convert.toObject(data[index]);
91 }
92
93 public Object setBuffer(int index, Object value)
94 {
95 boolean old = data[index];
96 data[index] = Convert.toBoolean(value);
97 return Convert.toObject(old);
98 }
99
100 public final void setBooleanAt(int index, boolean value)
101 {
102 if (index > size)
103 throw new IndexOutOfBoundsException ();
104 data[index] = value;
105 }
106
107 public final void setBooleanAtBuffer(int index, boolean value)
108 {
109 data[index] = value;
110 }
111
112 protected void clearBuffer(int start, int count)
113 {
114 while (--count >= 0)
115 data[start++] = false;
116 }
117
118 public int getElementKind()
119 {
120 return BOOLEAN_VALUE;
121 }
122
123 public String getTag() { return "b"; }
124
125 public boolean consumeNext(int ipos, Consumer out)
126 {
127 int index = ipos >>> 1;
128 if (index >= size)
129 return false;
130 out.writeBoolean(data[index]);
131 return true;
132 }
133
134 public void consumePosRange(int iposStart, int iposEnd, Consumer out)
135 {
136 if (out.ignoring())
137 return;
138 int i = iposStart >>> 1;
139 int end = iposEnd >>> 1;
140 for (; i < end; i++)
141 out.writeBoolean(data[i]);
142 }
143
144
148 public void writeExternal(ObjectOutput out) throws IOException
149 {
150 int size = this.size;
151 out.writeInt(size);
152 for (int i = 0; i < size; i++)
153 out.writeBoolean(data[i]);
154 }
155
156 public void readExternal(ObjectInput in)
157 throws IOException, ClassNotFoundException
158 {
159 int size = in.readInt();
160 boolean[] data = new boolean[size];
161 for (int i = 0; i < size; i++)
162 data[i] = in.readBoolean();
163 this.data = data;
164 this.size = size;
165 }
166 }
167 |
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