Louis Royer
c81f5d2e5a
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flavien's git/Projet_JAVA_P2P_STRI2A/pipeline/pr-etape5 This commit looks good
72 lines
2.2 KiB
Java
72 lines
2.2 KiB
Java
package protocolP2P;
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import protocolP2P.Payload;
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import tools.BytesArrayTools;
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import localException.InternalError;
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import localException.SizeError;
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import localException.ProtocolError;
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import localException.TransmissionError;
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/** Representation of payload for discover request.
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* @author Louis Royer
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* @author Flavien Haas
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* @author JS Auge
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* @version 1.0
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*/
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public class DiscoverRequest extends Payload {
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private String filename;
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/** Constructor with filename (typically used by client). If filename is null, it is initialized with "".
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* @param filename Name of the file you want a server list of.
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* @throws InternalError
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*/
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public DiscoverRequest(String filename) throws InternalError {
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super(RequestResponseCode.DISCOVER_REQUEST);
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if (filename == null) {
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this.filename = "";
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} else {
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this.filename = filename;
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}
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}
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/** Constructor (typically used by server) with a byte[] parameter containing the Packet received.
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* @param packet the full Packet received
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* @throws SizeError
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* @throws InternalError
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* @throws ProtocolError
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* @throws TransmissionError
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*/
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protected DiscoverRequest(byte[] packet) throws SizeError, ProtocolError, InternalError, TransmissionError {
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super(packet);
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int size = getPayloadSize(packet);
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filename = BytesArrayTools.readString(packet, Payload.PAYLOAD_START_POSITION, size);
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}
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/** Returns a byte[] containing Packet with padding.
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* This Packet is still incomplete and should not be send directly.
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* ProtocolP2PPacket will use this method to generate the complete Packet.
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* @return Packet with padding
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* @throws InternalError
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*/
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protected byte[] toPacket() throws InternalError {
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// compute total size
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int size = PAYLOAD_START_POSITION + filename.length();
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byte[] packet = new byte[size]; // java initialize all to zero
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// set request/response code
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packet[RequestResponseCode.RRCODE_POSITION] = requestResponseCode.codeValue;
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// set Payload size
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setPayloadSize(size - PAYLOAD_START_POSITION, packet);
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// write filename to Packet
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BytesArrayTools.write(packet, filename, PAYLOAD_START_POSITION);
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return packet;
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}
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/** Filename getter.
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* @return filename
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*/
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public String getFilename() {
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return filename;
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}
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}
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