/* Copyright (c) 2011 Danish Maritime Authority.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package dk.dma.ais.packet;
import dk.dma.ais.binary.SixbitException;
import dk.dma.ais.message.AisMessage;
import dk.dma.ais.message.AisMessageException;
import dk.dma.ais.message.IPositionMessage;
import dk.dma.ais.packet.AisPacketTags.SourceType;
import dk.dma.ais.reader.AisReader;
import dk.dma.ais.reader.AisReaders;
import dk.dma.ais.sentence.SentenceException;
import dk.dma.ais.sentence.Vdm;
import org.junit.Assert;
import org.junit.Test;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.Date;
import java.util.function.Consumer;
import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.CoreMatchers.not;
import static org.hamcrest.CoreMatchers.nullValue;
import static org.junit.Assert.assertThat;
public class AisPacketTest {
@Test
public void readPacketTest() throws IOException, InterruptedException {
// Open input stream
URL url = ClassLoader.getSystemResource("small_cb_example.txt");
Assert.assertNotNull(url);
InputStream inputStream = url.openStream();
Assert.assertNotNull(inputStream);
// Make AIS reader instance
AisReader aisReader = AisReaders.createReaderFromInputStream(inputStream);
// Set the source name
aisReader.setSourceId("some_file_dump");
aisReader.registerPacketHandler(new Consumer<AisPacket>() {
@Override
public void accept(AisPacket aisPacket) {
System.out.println("--\npacket received:\n" + aisPacket.getStringMessage());
// Try to get timestamp
Date timestamp = aisPacket.getTimestamp();
System.out.println("timestamp: " + timestamp);
Assert.assertNotNull(timestamp);
// Get tagging
AisPacketTags tagging = aisPacket.getTags();
Assert.assertEquals(tagging.getSourceId(), "some_file_dump");
// Try to get AIS message
try {
AisMessage message = aisPacket.getAisMessage();
if (message instanceof IPositionMessage) {
// Position message
((IPositionMessage) message).getPos();
}
} catch (AisMessageException | SixbitException e) {
// Failed to parse AIS message in VDM
e.printStackTrace();
}
}
});
aisReader.start();
aisReader.join();
}
@Test
public void retryTest() throws IOException {
try (AisPacketReader r = AisPacketReader.createFromSystemResource("retry_example.txt", false)) {
r.forEachRemaining(new Consumer<AisPacket>() {
final int[] senders = { 563510000, 211235220, 2655619, 246250000, 205634000, 211462260 };
int count;
@Override
public void accept(AisPacket aisPacket) {
AisMessage message = null;
try {
message = aisPacket.getAisMessage();
} catch (AisMessageException | SixbitException e) {
Assert.fail(e.getMessage());
}
Assert.assertEquals(senders[count++], message.getUserId());
}
});
}
}
@Test
public void packetFromStringTest() throws SentenceException, AisMessageException, SixbitException {
String msg;
msg = "$PGHP,1,2010,6,11,11,46,11,929,244,0,,1,72*21\r\n";
msg += "\\1G2:0125,c:1354719387*0D\\!AIVDM,2,1,4,A,539LiHP2;42`@pE<000<tq@V1<TpL4000000001?1SV@@73R0J0TQCAD,0*1E\r\n";
msg += "\\2G2:0125*7B\\!AIVDM,2,2,4,A,R0EQCP000000000,2*45";
AisPacket packet = AisPacket.readFromString(msg);
Assert.assertNotNull(packet);
Assert.assertNotNull(packet.getVdm());
Assert.assertNotNull(packet.getVdm().getTags());
AisMessage aisMessage = AisMessage.getInstance(packet.getVdm());
Assert.assertEquals(aisMessage.getMsgId(), 5);
}
@Test
public void packetTaggingTest() throws SentenceException {
String msg;
msg = "$PGHP,1,2010,6,11,11,46,11,929,244,0,,1,72*21\r\n";
msg += "\\1G2:0125,c:1354719387*0D\\!AIVDM,2,1,4,A,539LiHP2;42`@pE<000<tq@V1<TpL4000000001?1SV@@73R0J0TQCAD,0*1E\r\n";
msg += "\\2G2:0125*7B\\!AIVDM,2,2,4,A,R0EQCP000000000,2*45";
AisPacket packet = AisPacket.readFromString(msg);
AisPacketTags tags = packet.getTags();
Assert.assertEquals(tags.getSourceId(), null);
Assert.assertEquals(tags.getSourceCountry().getThreeLetter(), "NLD");
Assert.assertEquals(tags.getTimestamp().getTime(), 1354719387000L);
Assert.assertEquals(tags.getSourceBs(), null);
Assert.assertEquals(tags.getSourceType(), null);
msg = "$PGHP,1,2010,6,11,11,46,11,929,244,0,,1,72*21\r\n";
msg += "\\si:AISD*3F\\\r\n";
msg += "\\1G2:0125,c:1354719387*0D\\!AIVDM,2,1,4,A,539LiHP2;42`@pE<000<tq@V1<TpL4000000001?1SV@@73R0J0TQCAD,0*1E\r\n";
msg += "\\2G2:0125*7B\\!AIVDM,2,2,4,A,R0EQCP000000000,2*45";
packet = AisPacket.readFromString(msg);
tags = packet.getTags();
Assert.assertEquals(tags.getSourceId(), "AISD");
Assert.assertEquals(tags.getSourceCountry().getThreeLetter(), "NLD");
Assert.assertEquals(tags.getTimestamp().getTime(), 1354719387000L);
Assert.assertEquals(tags.getSourceBs(), null);
Assert.assertEquals(tags.getSourceType(), null);
msg = "$PGHP,1,2013,3,13,10,39,18,375,219,,2190047,1,4A*57\r\n";
msg += "\\si:AISD,sb:2190048,sc:SWE,st:SAT*1E\\\r\n";
msg += "\\g:1-2-0136,c:1354725824*22\\!BSVDM,2,1,4,B,53B>2V000000uHH4000@T4p4000000000000000S30C6340006h00000,0*4C\r\n";
msg += "\\g:2-2-0136*59\\!BSVDM,2,2,4,B,000000000000000,2*3A";
packet = AisPacket.readFromString(msg);
tags = packet.getTags();
Assert.assertEquals(tags.getSourceId(), "AISD");
Assert.assertEquals(tags.getSourceCountry().getThreeLetter(), "SWE");
Assert.assertEquals(tags.getTimestamp().getTime(), 1354725824000L);
Assert.assertEquals(tags.getSourceBs().intValue(), 2190048);
Assert.assertEquals(tags.getSourceType(), SourceType.SATELLITE);
}
@Test
public void packetVdmCanBeUsedToCreateMessage() throws SentenceException, AisMessageException, SixbitException {
String sentence = "!BSVDM,1,1,,B,33@nl?@01EPk<FDPw<2qW7`B07kh,0*5E";
Vdm vdm = new Vdm();
vdm.parse(sentence);
AisMessage messageFromDirectVdm = AisMessage.getInstance(vdm);
assertThat(messageFromDirectVdm, is(not(nullValue())));
AisPacket packet = AisPacket.readFromString(sentence);
AisMessage msg = packet.tryGetAisMessage();
Vdm packetVdm = msg.getVdm();
AisMessage messageFromPacketVdm = AisMessage.getInstance(packetVdm);
assertThat(messageFromPacketVdm, is(not(nullValue())));
}
}