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b1baa808 MK |
1 | /******************************************************************************* |
2 | * Copyright (c) 2012 Ericsson | |
3 | * | |
4 | * All rights reserved. This program and the accompanying materials are made | |
5 | * available under the terms of the Eclipse Public License v1.0 which | |
6 | * accompanies this distribution, and is available at | |
7 | * http://www.eclipse.org/legal/epl-v10.html | |
8 | * | |
9 | * Contributors: Matthew Khouzam - Initial API and implementation | |
10 | *******************************************************************************/ | |
a3fc8213 AM |
11 | package org.eclipse.linuxtools.tmf.core.ctfadaptor; |
12 | ||
13 | import org.eclipse.linuxtools.ctf.core.trace.CTFTraceReader; | |
14 | import org.eclipse.linuxtools.ctf.core.trace.StreamInputReader; | |
15 | import org.eclipse.linuxtools.tmf.core.trace.ITmfContext; | |
16 | import org.eclipse.linuxtools.tmf.core.trace.ITmfLocation; | |
17 | ||
b1baa808 MK |
18 | /** |
19 | * The ctfIterator is the class that will act like a reader for the trace | |
20 | * it does not have a file handle, so many iterators can be used without worries | |
21 | * of io errors. | |
22 | */ | |
0879b6b9 | 23 | public class CtfIterator extends CTFTraceReader implements ITmfContext, Comparable<CtfIterator>, Cloneable { |
a3fc8213 AM |
24 | |
25 | private final CtfTmfTrace ctfTmfTrace; | |
26 | ||
f474d36b | 27 | final public static CtfLocation NULL_LOCATION = new CtfLocation( |
57c073c5 | 28 | CtfLocation.INVALID_LOCATION); |
a3fc8213 AM |
29 | private CtfLocation curLocation; |
30 | private long curRank; | |
31 | ||
32 | /** | |
33 | * Create a new CTF trace iterator, which initially points at the first | |
34 | * event in the trace. | |
35 | * | |
b1baa808 | 36 | * @param trace the trace to iterate over |
a3fc8213 | 37 | */ |
ce2388e0 | 38 | public CtfIterator(final CtfTmfTrace trace) { |
a3fc8213 AM |
39 | super(trace.getCTFTrace()); |
40 | this.ctfTmfTrace = trace; | |
57c073c5 | 41 | if (this.hasMoreEvents()) { |
a3fc8213 | 42 | |
57c073c5 MK |
43 | this.curLocation = new CtfLocation(trace.getStartTime()); |
44 | this.curRank = 0; | |
45 | } else { | |
46 | setUnknownLocation(); | |
47 | } | |
a3fc8213 AM |
48 | } |
49 | ||
57c073c5 MK |
50 | /** |
51 | * | |
52 | */ | |
53 | private void setUnknownLocation() { | |
f474d36b | 54 | this.curLocation = NULL_LOCATION; |
57c073c5 MK |
55 | this.curRank = UNKNOWN_RANK; |
56 | } | |
57 | ||
b1baa808 MK |
58 | /** |
59 | * Constructor for CtfIterator. | |
60 | * @param trace CtfTmfTrace the trace | |
61 | * @param timestampValue long the timestamp in ns of the trace for positioning | |
62 | * @param rank long the index of the trace for positioning | |
63 | */ | |
57c073c5 MK |
64 | public CtfIterator(final CtfTmfTrace trace, final long timestampValue, |
65 | final long rank) { | |
a3fc8213 | 66 | super(trace.getCTFTrace()); |
57c073c5 | 67 | |
a3fc8213 | 68 | this.ctfTmfTrace = trace; |
57c073c5 MK |
69 | if (this.hasMoreEvents()) { |
70 | this.curLocation = (new CtfLocation(this.getCurrentEvent() | |
71 | .getTimestampValue())); | |
72 | if (this.getCurrentEvent().getTimestampValue() != timestampValue) { | |
73 | this.seek(timestampValue); | |
74 | this.curRank = rank; | |
75 | } | |
76 | } else { | |
77 | setUnknownLocation(); | |
78 | } | |
a3fc8213 | 79 | |
a3fc8213 AM |
80 | } |
81 | ||
b1baa808 MK |
82 | /** |
83 | * Method getCtfTmfTrace. gets a CtfTmfTrace | |
84 | * @return CtfTmfTrace | |
85 | */ | |
a3fc8213 AM |
86 | public CtfTmfTrace getCtfTmfTrace() { |
87 | return ctfTmfTrace; | |
88 | } | |
89 | ||
b1baa808 MK |
90 | /** |
91 | * Method getCurrentEvent. gets the current event | |
92 | * @return CtfTmfEvent | |
93 | */ | |
a3fc8213 | 94 | public CtfTmfEvent getCurrentEvent() { |
ce2388e0 | 95 | final StreamInputReader top = super.prio.peek(); |
57c073c5 MK |
96 | if (top != null) { |
97 | return new CtfTmfEvent(top.getCurrentEvent(), top.getFilename(), | |
98 | ctfTmfTrace); | |
99 | } | |
a3fc8213 AM |
100 | return null; |
101 | } | |
102 | ||
b1baa808 MK |
103 | /** |
104 | * Method seek. Seeks to a given timestamp | |
105 | * @param timestamp long the timestamp in ns (utc) | |
106 | * @return boolean | |
107 | */ | |
a3fc8213 | 108 | @Override |
ce2388e0 | 109 | public boolean seek(final long timestamp) { |
a3fc8213 | 110 | boolean ret = false; |
57c073c5 | 111 | final long offsetTimestamp = timestamp |
bfe038ff | 112 | - this.getTrace().getOffset(); |
57c073c5 | 113 | if (offsetTimestamp < 0) { |
ce2388e0 | 114 | ret = super.seek(timestamp); |
57c073c5 | 115 | } else { |
ce2388e0 | 116 | ret = super.seek(offsetTimestamp); |
57c073c5 | 117 | } |
a3fc8213 | 118 | |
57c073c5 | 119 | if (ret) { |
ce2388e0 | 120 | curLocation.setLocation(getCurrentEvent().getTimestampValue()); |
f474d36b PT |
121 | } else { |
122 | curLocation = NULL_LOCATION; | |
57c073c5 | 123 | } |
ce2388e0 FC |
124 | return ret; |
125 | } | |
126 | ||
b1baa808 MK |
127 | /** |
128 | * Method getRank. | |
129 | * @return long | |
130 | * @see org.eclipse.linuxtools.tmf.core.trace.ITmfContext#getRank() | |
131 | */ | |
a3fc8213 AM |
132 | @Override |
133 | public long getRank() { | |
f474d36b | 134 | return curRank; |
a3fc8213 AM |
135 | } |
136 | ||
b1baa808 MK |
137 | /** |
138 | * Method setRank. | |
139 | * @param rank long | |
140 | * @see org.eclipse.linuxtools.tmf.core.trace.ITmfContext#setRank(long) | |
141 | */ | |
a3fc8213 | 142 | @Override |
ce2388e0 | 143 | public void setRank(final long rank) { |
f474d36b | 144 | curRank = rank; |
a3fc8213 AM |
145 | } |
146 | ||
147 | /* | |
148 | * (non-Javadoc) | |
149 | * | |
150 | * @see org.eclipse.linuxtools.tmf.core.trace.TmfContext#clone() | |
151 | */ | |
152 | @Override | |
153 | public CtfIterator clone() { | |
154 | CtfIterator clone = null; | |
408e65d2 | 155 | clone = new CtfIterator(ctfTmfTrace, this.getCurrentEvent().getTimestampValue(), curRank); |
a3fc8213 AM |
156 | return clone; |
157 | } | |
158 | ||
b1baa808 MK |
159 | /** |
160 | * Method dispose. | |
161 | * @see org.eclipse.linuxtools.tmf.core.trace.ITmfContext#dispose() | |
162 | */ | |
a3fc8213 AM |
163 | @Override |
164 | public void dispose() { | |
165 | // FIXME add dispose() stuff to CTFTrace and call it here... | |
166 | ||
167 | } | |
168 | ||
b1baa808 MK |
169 | /** |
170 | * Method setLocation. | |
171 | * @param location ITmfLocation<?> | |
172 | * @see org.eclipse.linuxtools.tmf.core.trace.ITmfContext#setLocation(ITmfLocation<?>) | |
173 | */ | |
a3fc8213 | 174 | @Override |
ce2388e0 | 175 | public void setLocation(final ITmfLocation<?> location) { |
a3fc8213 AM |
176 | // FIXME alex: isn't there a cleaner way than a cast here? |
177 | this.curLocation = (CtfLocation) location; | |
57c073c5 | 178 | seek(((CtfLocation) location).getLocation()); |
a3fc8213 AM |
179 | } |
180 | ||
b1baa808 MK |
181 | /** |
182 | * Method getLocation. | |
183 | * @return CtfLocation | |
184 | * @see org.eclipse.linuxtools.tmf.core.trace.ITmfContext#getLocation() | |
185 | */ | |
a3fc8213 AM |
186 | @Override |
187 | public CtfLocation getLocation() { | |
188 | return curLocation; | |
189 | } | |
190 | ||
b1baa808 MK |
191 | /** |
192 | * Method increaseRank. | |
193 | * @see org.eclipse.linuxtools.tmf.core.trace.ITmfContext#increaseRank() | |
194 | */ | |
a3fc8213 | 195 | @Override |
cbdacf03 | 196 | public void increaseRank() { |
4a110860 AM |
197 | /* Only increase the rank if it's valid */ |
198 | if(hasValidRank()) { | |
199 | curRank++; | |
200 | } | |
a3fc8213 AM |
201 | } |
202 | ||
b1baa808 MK |
203 | /** |
204 | * Method hasValidRank, if the iterator is valid | |
205 | * @return boolean | |
206 | * @see org.eclipse.linuxtools.tmf.core.trace.ITmfContext#hasValidRank() | |
207 | */ | |
a3fc8213 | 208 | @Override |
cbdacf03 | 209 | public boolean hasValidRank() { |
bcbea6a6 | 210 | return (getRank() >= 0); |
a3fc8213 AM |
211 | } |
212 | ||
b1baa808 MK |
213 | /** |
214 | * Method advance go to the next event | |
215 | * @return boolean successful or not | |
216 | */ | |
a3fc8213 AM |
217 | @Override |
218 | public boolean advance() { | |
f474d36b PT |
219 | boolean ret = super.advance(); |
220 | if (ret) { | |
221 | curLocation.setLocation(getCurrentEvent().getTimestampValue()); | |
222 | } else { | |
223 | curLocation = NULL_LOCATION; | |
224 | } | |
225 | return ret; | |
a3fc8213 AM |
226 | } |
227 | ||
b1baa808 MK |
228 | /** |
229 | * Method compareTo. | |
230 | * @param o CtfIterator | |
231 | * @return int -1, 0, 1 | |
232 | */ | |
a3fc8213 | 233 | @Override |
ce2388e0 | 234 | public int compareTo(final CtfIterator o) { |
57c073c5 | 235 | if (this.getRank() < o.getRank()) { |
a3fc8213 | 236 | return -1; |
57c073c5 | 237 | } else if (this.getRank() > o.getRank()) { |
a3fc8213 | 238 | return 1; |
57c073c5 | 239 | } |
a3fc8213 AM |
240 | return 0; |
241 | } | |
b1baa808 MK |
242 | /* (non-Javadoc) |
243 | * @see java.lang.Object#hashCode() | |
244 | */ | |
245 | @Override | |
246 | public int hashCode() { | |
247 | final int prime = 31; | |
248 | int result = super.hashCode(); | |
249 | result = (prime * result) | |
250 | + ((ctfTmfTrace == null) ? 0 : ctfTmfTrace.hashCode()); | |
251 | result = (prime * result) | |
252 | + ((curLocation == null) ? 0 : curLocation.hashCode()); | |
253 | result = (prime * result) + (int) (curRank ^ (curRank >>> 32)); | |
254 | return result; | |
255 | } | |
a3fc8213 | 256 | |
b1baa808 MK |
257 | /* (non-Javadoc) |
258 | * @see java.lang.Object#equals(java.lang.Object) | |
259 | */ | |
260 | @Override | |
261 | public boolean equals(Object obj) { | |
262 | if (this == obj) { | |
263 | return true; | |
264 | } | |
265 | if (!super.equals(obj)) { | |
266 | return false; | |
267 | } | |
268 | if (!(obj instanceof CtfIterator)) { | |
269 | return false; | |
270 | } | |
271 | CtfIterator other = (CtfIterator) obj; | |
272 | if (ctfTmfTrace == null) { | |
273 | if (other.ctfTmfTrace != null) { | |
274 | return false; | |
275 | } | |
276 | } else if (!ctfTmfTrace.equals(other.ctfTmfTrace)) { | |
277 | return false; | |
278 | } | |
279 | if (curLocation == null) { | |
280 | if (other.curLocation != null) { | |
281 | return false; | |
282 | } | |
283 | } else if (!curLocation.equals(other.curLocation)) { | |
284 | return false; | |
285 | } | |
286 | if (curRank != other.curRank) { | |
287 | return false; | |
288 | } | |
289 | return true; | |
290 | } | |
ce2388e0 | 291 | } |