MtasPayloadEncoder.java.html
10.9 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml" lang="en"><head><meta http-equiv="Content-Type" content="text/html;charset=UTF-8"/><link rel="stylesheet" href="../.resources/report.css" type="text/css"/><link rel="shortcut icon" href="../.resources/report.gif" type="image/gif"/><title>MtasPayloadEncoder.java</title><link rel="stylesheet" href="../.resources/prettify.css" type="text/css"/><script type="text/javascript" src="../.resources/prettify.js"></script></head><body onload="window['PR_TAB_WIDTH']=4;prettyPrint()"><div class="breadcrumb" id="breadcrumb"><span class="info"><a href="../.sessions.html" class="el_session">Sessions</a></span><a href="../index.html" class="el_report">MTAS</a> > <a href="index.source.html" class="el_package">mtas.codec.payload</a> > <span class="el_source">MtasPayloadEncoder.java</span></div><h1>MtasPayloadEncoder.java</h1><pre class="source lang-java linenums">package mtas.codec.payload;
import java.io.IOException;
import java.util.Arrays;
import mtas.analysis.token.MtasPosition;
import mtas.analysis.token.MtasToken;
import mtas.analysis.token.MtasTokenString;
import org.apache.lucene.util.BytesRef;
/**
* The Class MtasPayloadEncoder.
*/
/**
* The Class MtasPayloadEncoder.
*/
public class MtasPayloadEncoder {
/** The mtas token. */
private MtasToken mtasToken;
/** The byte stream. */
private MtasBitOutputStream byteStream;
/** The encoding flags. */
private int encodingFlags;
/** The encode payload. */
public final static int ENCODE_PAYLOAD = 1;
/** The encode offset. */
public final static int ENCODE_OFFSET = 2;
/** The encode realoffset. */
public final static int ENCODE_REALOFFSET = 4;
/** The encode parent. */
public final static int ENCODE_PARENT = 8;
/** The encode default. */
public final static int ENCODE_DEFAULT = ENCODE_PAYLOAD | ENCODE_OFFSET
| ENCODE_PARENT;
/** The encode all. */
public final static int ENCODE_ALL = ENCODE_PAYLOAD | ENCODE_OFFSET
| ENCODE_REALOFFSET | ENCODE_PARENT;
/**
* Instantiates a new mtas payload encoder.
*
* @param token
* the token
* @param flags
* the flags
*/
<span class="fc" id="L58"> public MtasPayloadEncoder(MtasToken token, int flags) {</span>
<span class="fc" id="L59"> mtasToken = token;</span>
<span class="fc" id="L60"> byteStream = new MtasBitOutputStream();</span>
<span class="fc" id="L61"> encodingFlags = flags;</span>
<span class="fc" id="L62"> }</span>
/**
* Instantiates a new mtas payload encoder.
*
* @param token
* the token
*/
public MtasPayloadEncoder(MtasToken token) {
<span class="nc" id="L71"> this(token, ENCODE_DEFAULT);</span>
<span class="nc" id="L72"> }</span>
/**
* Gets the payload.
*
* @return the payload
* @throws IOException
* Signals that an I/O exception has occurred.
*/
public BytesRef getPayload() throws IOException {
// initial bits - position
<span class="fc bfc" id="L84" title="All 2 branches covered."> if (mtasToken.checkPositionType(MtasPosition.POSITION_SINGLE)) {</span>
<span class="fc" id="L85"> byteStream.writeBit(0);</span>
<span class="fc" id="L86"> byteStream.writeBit(0);</span>
<span class="fc bfc" id="L87" title="All 2 branches covered."> } else if (mtasToken.checkPositionType(MtasPosition.POSITION_RANGE)) {</span>
<span class="fc" id="L88"> byteStream.writeBit(1);</span>
<span class="fc" id="L89"> byteStream.writeBit(0);</span>
<span class="pc bpc" id="L90" title="1 of 2 branches missed."> } else if (mtasToken.checkPositionType(MtasPosition.POSITION_SET)) {</span>
<span class="fc" id="L91"> byteStream.writeBit(0);</span>
<span class="fc" id="L92"> byteStream.writeBit(1);</span>
} else {
<span class="nc" id="L94"> byteStream.writeBit(1);</span>
<span class="nc" id="L95"> byteStream.writeBit(1);</span>
}
// initial bits - offset
<span class="pc bpc" id="L98" title="1 of 2 branches missed."> if ((encodingFlags & ENCODE_OFFSET) == ENCODE_OFFSET</span>
<span class="nc bnc" id="L99" title="All 2 branches missed."> && mtasToken.checkOffset()) {</span>
<span class="nc" id="L100"> byteStream.writeBit(1);</span>
} else {
<span class="fc" id="L102"> byteStream.writeBit(0);</span>
}
// initial bits - realOffset
<span class="pc bpc" id="L105" title="1 of 2 branches missed."> if ((encodingFlags & ENCODE_REALOFFSET) == ENCODE_REALOFFSET</span>
<span class="nc bnc" id="L106" title="All 2 branches missed."> && mtasToken.checkRealOffset()) {</span>
<span class="nc" id="L107"> byteStream.writeBit(1);</span>
} else {
<span class="fc" id="L109"> byteStream.writeBit(0);</span>
}
// initial bits - parentId
<span class="pc bpc" id="L112" title="1 of 2 branches missed."> if ((encodingFlags & ENCODE_PARENT) == ENCODE_PARENT</span>
<span class="fc bfc" id="L113" title="All 2 branches covered."> && mtasToken.checkParentId()) {</span>
<span class="fc" id="L114"> byteStream.writeBit(1);</span>
} else {
<span class="fc" id="L116"> byteStream.writeBit(0);</span>
}
// initial bits - original payload
<span class="pc bpc" id="L119" title="1 of 2 branches missed."> if ((encodingFlags & ENCODE_PAYLOAD) == ENCODE_PAYLOAD</span>
<span class="nc bnc" id="L120" title="All 2 branches missed."> && mtasToken.getPayload() != null) {</span>
<span class="nc" id="L121"> byteStream.writeBit(1);</span>
} else {
<span class="fc" id="L123"> byteStream.writeBit(0);</span>
}
<span class="pc bpc" id="L125" title="1 of 2 branches missed."> if (mtasToken.getType().equals(MtasTokenString.TOKEN_TYPE)) {</span>
<span class="fc" id="L126"> byteStream.writeBit(0);</span>
} else {
// to add other token types later on
<span class="nc" id="L129"> byteStream.writeBit(1);</span>
}
// add id (EliasGammaCoding)
<span class="fc" id="L132"> byteStream.writeEliasGammaCodingNonNegativeInteger(mtasToken.getId());</span>
// add position info (EliasGammaCoding)
<span class="fc bfc" id="L134" title="All 2 branches covered."> if (mtasToken.checkPositionType(MtasPosition.POSITION_SINGLE)) {</span>
// do nothing
<span class="fc bfc" id="L136" title="All 2 branches covered."> } else if (mtasToken.checkPositionType(MtasPosition.POSITION_RANGE)) {</span>
// write length
<span class="fc" id="L138"> byteStream.writeEliasGammaCodingPositiveInteger(</span>
<span class="fc" id="L139"> 1 + mtasToken.getPositionEnd() - mtasToken.getPositionStart());</span>
<span class="pc bpc" id="L140" title="1 of 2 branches missed."> } else if (mtasToken.checkPositionType(MtasPosition.POSITION_SET)) {</span>
// write number of positions
<span class="fc" id="L142"> int[] positionList = mtasToken.getPositions();</span>
<span class="fc" id="L143"> byteStream.writeEliasGammaCodingPositiveInteger(positionList.length);</span>
<span class="fc" id="L144"> int previousPosition = positionList[0];</span>
<span class="fc bfc" id="L145" title="All 2 branches covered."> for (int i = 1; i < positionList.length; i++) {</span>
<span class="fc" id="L146"> byteStream.writeEliasGammaCodingPositiveInteger(</span>
positionList[i] - previousPosition);
<span class="fc" id="L148"> previousPosition = positionList[i];</span>
}
} else {
// do nothing
}
// add offset info (EliasGammaCoding)
<span class="pc bpc" id="L154" title="1 of 2 branches missed."> if ((encodingFlags & ENCODE_OFFSET) == ENCODE_OFFSET</span>
<span class="nc bnc" id="L155" title="All 2 branches missed."> && mtasToken.checkOffset()) {</span>
<span class="nc" id="L156"> byteStream</span>
<span class="nc" id="L157"> .writeEliasGammaCodingNonNegativeInteger(mtasToken.getOffsetStart());</span>
<span class="nc" id="L158"> byteStream.writeEliasGammaCodingPositiveInteger(</span>
<span class="nc" id="L159"> 1 + mtasToken.getOffsetEnd() - mtasToken.getOffsetStart());</span>
}
// add realOffset info (EliasGammaCoding)
<span class="pc bpc" id="L162" title="1 of 2 branches missed."> if ((encodingFlags & ENCODE_REALOFFSET) == ENCODE_REALOFFSET</span>
<span class="nc bnc" id="L163" title="All 2 branches missed."> && mtasToken.checkRealOffset()) {</span>
<span class="nc bnc" id="L164" title="All 2 branches missed."> if ((encodingFlags & ENCODE_OFFSET) == ENCODE_OFFSET</span>
<span class="nc bnc" id="L165" title="All 2 branches missed."> && mtasToken.checkOffset()) {</span>
<span class="nc" id="L166"> byteStream.writeEliasGammaCodingInteger(</span>
<span class="nc" id="L167"> mtasToken.getRealOffsetStart() - mtasToken.getOffsetStart());</span>
<span class="nc" id="L168"> byteStream.writeEliasGammaCodingPositiveInteger(</span>
<span class="nc" id="L169"> 1 + mtasToken.getRealOffsetEnd() - mtasToken.getRealOffsetStart());</span>
} else {
<span class="nc" id="L171"> byteStream.writeEliasGammaCodingNonNegativeInteger(</span>
<span class="nc" id="L172"> mtasToken.getRealOffsetStart());</span>
<span class="nc" id="L173"> byteStream.writeEliasGammaCodingPositiveInteger(</span>
<span class="nc" id="L174"> 1 + mtasToken.getRealOffsetEnd() - mtasToken.getRealOffsetStart());</span>
}
}
// add parent info (EliasGammaCoding)
<span class="pc bpc" id="L178" title="1 of 2 branches missed."> if ((encodingFlags & ENCODE_PARENT) == ENCODE_PARENT</span>
<span class="fc bfc" id="L179" title="All 2 branches covered."> && mtasToken.checkParentId()) {</span>
<span class="fc" id="L180"> byteStream.writeEliasGammaCodingInteger(</span>
<span class="fc" id="L181"> mtasToken.getParentId() - mtasToken.getId());</span>
}
// add minimal number of zero-bits to get round number of bytes
<span class="fc" id="L184"> byteStream.createByte();</span>
// finally add original payload bytes
<span class="pc bpc" id="L186" title="1 of 2 branches missed."> if ((encodingFlags & ENCODE_PAYLOAD) == ENCODE_PAYLOAD</span>
<span class="nc bnc" id="L187" title="All 2 branches missed."> && mtasToken.getPayload() != null) {</span>
<span class="nc" id="L188"> BytesRef payload = mtasToken.getPayload();</span>
<span class="nc" id="L189"> byteStream.write(Arrays.copyOfRange(payload.bytes, payload.offset,</span>
(payload.offset + payload.length)));
}
// construct new payload
<span class="fc" id="L193"> return new BytesRef(byteStream.toByteArray());</span>
}
}
</pre><div class="footer"><span class="right">Created with <a href="http://www.eclemma.org/jacoco">JaCoCo</a> 0.7.5.201505241946</span></div></body></html>