|
1
38
39
40 package com.sun.xml.fastinfoset.algorithm;
41
42 import java.io.EOFException  ;
43 import java.io.IOException ;
44 import java.io.InputStream ;
45 import java.io.OutputStream ;
46 import java.nio.CharBuffer ;
47 import java.util.ArrayList ;
48 import java.util.List ;
49 import org.jvnet.fastinfoset.EncodingAlgorithmException;
50 import com.sun.xml.fastinfoset.CommonResourceBundle;
51
52 public class HexadecimalEncodingAlgorithm extends BuiltInEncodingAlgorithm {
53 private static final char NIBBLE_TO_HEXADECIMAL_TABLE[] =
54 { '0','1','2','3','4','5','6','7',
55 '8','9','A','B','B','D','E','F' };
56
57 private static final int HEXADECIMAL_TO_NIBBLE_TABLE[] = {
58 0,
59 1,
60 2,
61 3,
62 4,
63 5,
64 6,
65 7,
66 8,
67 9, -1, -1, -1, -1, -1, -1, -1,
68 10,
69 11,
70 12,
71 13,
72 14,
73 15,
74 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
75 -1, -1, -1, -1, -1, -1,
76 10,
77 11,
78 12,
79 13,
80 14,
81 15 };
82
83 public final Object decodeFromBytes(byte[] b, int start, int length) throws EncodingAlgorithmException {
84 final byte[] data = new byte[length];
85 System.arraycopy(b, start, data, 0, length);
86 return data;
87 }
88
89 public final Object decodeFromInputStream(InputStream s) throws IOException {
90 throw new UnsupportedOperationException (CommonResourceBundle.getInstance().getString("message.notImplemented"));
91 }
92
93
94 public void encodeToOutputStream(Object data, OutputStream s) throws IOException {
95 if (!(data instanceof byte[])) {
96 throw new IllegalArgumentException (CommonResourceBundle.getInstance().getString("message.dataNotByteArray"));
97 }
98
99 s.write((byte[])data);
100 }
101
102 public final Object convertFromCharacters(char[] ch, int start, int length) {
103 if (length == 0) {
104 return new byte[0];
105 }
106
107 StringBuffer encodedValue = removeWhitespace(ch, start, length);
108 int encodedLength = encodedValue.length();
109 if (encodedLength == 0) {
110 return new byte[0];
111 }
112
113 int valueLength = encodedValue.length() / 2;
114 byte[] value = new byte[valueLength];
115
116 int encodedIdx = 0;
117 for (int i = 0; i < valueLength; ++i) {
118 int nibble1 = HEXADECIMAL_TO_NIBBLE_TABLE[encodedValue.charAt(encodedIdx++) - '0'];
119 int nibble2 = HEXADECIMAL_TO_NIBBLE_TABLE[encodedValue.charAt(encodedIdx++) - '0'];
120 value[i] = (byte) ((nibble1 << 4) | nibble2);
121 }
122
123 return value;
124 }
125
126 public final void convertToCharacters(Object data, StringBuffer s) {
127 if (data == null) {
128 return;
129 }
130 final byte[] value = (byte[]) data;
131 if (value.length == 0) {
132 return;
133 }
134
135 s.ensureCapacity(value.length * 2);
136 for (int i = 0; i < value.length; ++i) {
137 s.append(NIBBLE_TO_HEXADECIMAL_TABLE[(value[i] >>> 4) & 0xf]);
138 s.append(NIBBLE_TO_HEXADECIMAL_TABLE[value[i] & 0xf]);
139 }
140 }
141
142
143
144 public final int getPrimtiveLengthFromOctetLength(int octetLength) throws EncodingAlgorithmException {
145 return octetLength * 2;
146 }
147
148 public int getOctetLengthFromPrimitiveLength(int primitiveLength) {
149 return primitiveLength / 2;
150 }
151
152 public final void encodeToBytes(Object array, int astart, int alength, byte[] b, int start) {
153 System.arraycopy((byte[])array, astart, b, start, alength);
154 }
155 }
156 |
Popular Tags |
Java API By Example, From Geeks To Geeks.