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1 package rep;
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2
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3 import java.io.IOException;
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4 import java.nio.ByteBuffer;
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5 import java.nio.CharBuffer;
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6 import java.nio.channels.SocketChannel;
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7 import java.nio.charset.Charset;
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8 import java.nio.charset.CharsetEncoder;
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9
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10
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11 public class REPPacketSend {
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12 SocketChannel socketchannel;
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13
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14 public REPPacketSend(SocketChannel sc){
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15 socketchannel = sc;
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16 }
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17
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18 public ByteBuffer pack(REPCommand command){
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19 System.out.println("send command: " + command.toString());
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20 ByteBuffer buffer = ByteBuffer.allocateDirect(24+(command.string).length()*2);
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21 buffer.clear(); // position = 0
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22 buffer.putInt(command.cmd); buffer.putInt(command.sid); buffer.putInt(command.eid);
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23 buffer.putInt(command.seq); buffer.putInt(command.lineno);
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24 buffer.putInt(command.string.length()*2);
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25 for(int i=0;i<command.string.length();i++) {
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26 buffer.putChar(command.string.charAt(i));
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27 }
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28 buffer.flip(); // limit = current position, position = 0
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29 return buffer;
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30 }
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31
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32 public ByteBuffer packUConv(REPCommand command){
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33 System.out.println("send command byUTF8: " + command.toString());
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34 ByteBuffer buffer = ByteBuffer.allocateDirect(24+(command.string).length()*5);
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35 buffer.clear(); // position = 0
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36 buffer.putInt(command.cmd); buffer.putInt(command.sid); buffer.putInt(command.eid);
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37 buffer.putInt(command.seq); buffer.putInt(command.lineno);
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38
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39 int pos = buffer.position();
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40 buffer.putInt(0);
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41
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42 //Encode to UTF8
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43 CharBuffer cb = CharBuffer.wrap(command.string);
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44 Charset charset = Charset.forName("UTF-8");
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45 CharsetEncoder encoder = charset.newEncoder();
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46 try {
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47 encoder.encode(cb, buffer, true);
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48 } catch (IllegalStateException e) {
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49 e.printStackTrace();
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50 }
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51
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52 //Encoded string length set
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53 buffer.putInt(pos, (buffer.position()-pos-4));
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54 buffer.flip();
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55
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56 return buffer;
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57 }
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58
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59 public void send(REPCommand command){
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60 try {
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61 socketchannel.write(pack(command));
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62 //System.out.println(command.toString());
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63 } catch (IOException e) {
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64 e.printStackTrace();
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65 }
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66 }
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67 }
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