<<<<<<< HEAD
/*
Copyright (C) 2011 ApPeAL Group, Politecnico di Torino
This file is part of TraCI4J.
TraCI4J is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
TraCI4J is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with TraCI4J. If not, see <http://www.gnu.org/licenses/>.
*/
package it.polito.appeal.traci.protocol;
import de.uniluebeck.itm.tcpip.Storage;
/**
* Represents a single TraCI command, with its identifier and content. It can
* be used either as a request (i.e. from client to server) and as a response
* (i.e. from server to client). The "command" term reflects the description
* in the <a href="http://sourceforge.net/apps/mediawiki/sumo/index.php?title=TraCI/Protocol#Messages">wiki</a>.
* Each command is characterized by a type identifier and a variable-sized
* content. The command can be constructed either from a data block (a
* {@link Storage}) or from scratch; its content can be read or written to a
* {@link Storage}.
*
* @author Enrico Gueli <enrico.gueli@polito.it>
* @see <a href="http://sourceforge.net/apps/mediawiki/sumo/index.php?title=TraCI/Protocol#Messages">Messages</a>
*/
public class Command {
private static final int HEADER_SIZE =
Byte.SIZE/8 // length 0
+ Integer.SIZE/8 // integer length
+ Byte.SIZE/8; // command id
private final int id;
private final Storage content;
/**
* Builds a command from a {@link Storage} received from the other endpoint.
* <p>
* Note that this will advance the storage's internal pointer to the next
* data.
* @param rawStorage
*/
public Command(Storage rawStorage) {
int contentLen = rawStorage.readUnsignedByte();
if (contentLen == 0)
contentLen = rawStorage.readInt() - 6;
else
contentLen = contentLen - 2;
id = rawStorage.readUnsignedByte();
short[] buf = new short[contentLen];
for (int i=0; i<contentLen; i++) {
buf[i] = (byte)rawStorage.readUnsignedByte();
}
content = new Storage(buf);
}
/**
* Creates a command with a given identifier and an empty content.
* @param id
*/
public Command(int id) {
if (id > 255)
throw new IllegalArgumentException("id should fit in a byte");
content = new Storage();
this.id = id;
}
/**
* Returns the type identifier.
* @return the id
*/
public int id() {
return id;
}
/**
* Returns the content.
* @return the content
*/
public Storage content() {
return content;
}
/**
* Writes the serialized form of this command to the given {@link Storage}
* object.
* <p>
* Note: this will advance the internal pointer of the given storage.
* @param out
*/
public void writeRawTo(Storage out) {
/*
* use only the long form (length 0 + length as integer)
*/
out.writeByte(0);
out.writeInt(HEADER_SIZE + content.size());
out.writeUnsignedByte(id);
for (Byte b : content.getStorageList()) {
out.writeByte(b);
}
}
/**
* Returns the expected size of the serialized form of this command.
*/
public int rawSize() {
return HEADER_SIZE + content.size();
}
}
=======
/*
Copyright (C) 2011 ApPeAL Group, Politecnico di Torino
This file is part of TraCI4J.
TraCI4J is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
TraCI4J is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with TraCI4J. If not, see <http://www.gnu.org/licenses/>.
*/
package it.polito.appeal.traci.protocol;
import de.uniluebeck.itm.tcpip.Storage;
/**
* Represents a single TraCI command, with its identifier and content. It can
* be used either as a request (i.e. from client to server) and as a response
* (i.e. from server to client). The "command" term reflects the description
* in the <a href="http://sourceforge.net/apps/mediawiki/sumo/index.php?title=TraCI/Protocol#Messages">wiki</a>.
* Each command is characterized by a type identifier and a variable-sized
* content. The command can be constructed either from a data block (a
* {@link Storage}) or from scratch; its content can be read or written to a
* {@link Storage}.
*
* @author Enrico Gueli <enrico.gueli@polito.it>
* @see <a href="http://sourceforge.net/apps/mediawiki/sumo/index.php?title=TraCI/Protocol#Messages">Messages</a>
*/
public class Command {
private static final int HEADER_SIZE =
Byte.SIZE/8 // length 0
+ Integer.SIZE/8 // integer length
+ Byte.SIZE/8; // command id
private final int id;
private final Storage content;
/**
* Builds a command from a {@link Storage} received from the other endpoint.
* <p>
* Note that this will advance the storage's internal pointer to the next
* data.
* @param rawStorage
*/
public Command(Storage rawStorage) {
int contentLen = rawStorage.readUnsignedByte();
if (contentLen == 0)
contentLen = rawStorage.readInt() - 6;
else
contentLen = contentLen - 2;
id = rawStorage.readUnsignedByte();
short[] buf = new short[contentLen];
for (int i=0; i<contentLen; i++) {
buf[i] = (byte)rawStorage.readUnsignedByte();
}
content = new Storage(buf);
}
/**
* Creates a command with a given identifier and an empty content.
* @param id
*/
public Command(int id) {
if (id > 255)
throw new IllegalArgumentException("id should fit in a byte");
content = new Storage();
this.id = id;
}
/**
* Returns the type identifier.
* @return the id
*/
public int id() {
return id;
}
/**
* Returns the content.
* @return the content
*/
public Storage content() {
return content;
}
/**
* Writes the serialized form of this command to the given {@link Storage}
* object.
* <p>
* Note: this will advance the internal pointer of the given storage.
* @param out
*/
public void writeRawTo(Storage out) {
/*
* use only the long form (length 0 + length as integer)
*/
out.writeByte(0);
out.writeInt(HEADER_SIZE + content.size());
out.writeUnsignedByte(id);
for (Byte b : content.getStorageList()) {
out.writeByte(b);
}
}
/**
* Returns the expected size of the serialized form of this command.
*/
public int rawSize() {
return HEADER_SIZE + content.size();
}
}
>>>>>>> origin/abdalla