querylastmsgsresp.java

SMPP（点到点短消息协议）的java实现

package ie.omk.smpp.message;

import ie.omk.smpp.util.SMPPIO;

import java.io.OutputStream;
import java.util.Iterator;
import java.util.List;
import java.util.Vector;

/**
 * SMSC response to a QueryLastMsgs request.
 * 
 * @author Oran Kelly
 * @version 1.0
 */
public class QueryLastMsgsResp extends ie.omk.smpp.message.SMPPResponse {
    /** The table of messages returned */
    private List messageTable = new Vector();

    /**
     * Construct a new QueryLastMsgsResp.
     */
    public QueryLastMsgsResp() {
        super(QUERY_LAST_MSGS_RESP);
    }

    /**
     * Construct a new QueryLastMsgsResp with specified sequence number.
     * 
     * @param seqNum
     *            The sequence number to use
     * @deprecated
     */
    public QueryLastMsgsResp(int seqNum) {
        super(QUERY_LAST_MSGS_RESP, seqNum);
    }

    /**
     * Create a new QueryLastMsgsResp packet in response to a BindReceiver. This
     * constructor will set the sequence number to it's expected value.
     * 
     * @param r
     *            The Request packet the response is to
     */
    public QueryLastMsgsResp(QueryLastMsgs r) {
        super(r);
    }

    /**
     * Add a message Id to the response packet.
     * 
     * @param id
     *            The message Id to add to the packet.
     * @return The current number of message Ids (including the new one).
     * @throws ie.omk.smpp.message.InvalidParameterValueException
     *             if the id is invalid.
     */
    public int addMessageId(String id) {
        if (!version.validateMessageId(id)) {
            throw new InvalidParameterValueException("Invalid message ID", id);
        }

        synchronized (messageTable) {
            messageTable.add(id);
            return messageTable.size();
        }
    }

    /** Get the number of message Ids. */
    public int getMsgCount() {
        return messageTable.size();
    }

    /**
     * Get a String array of the message Ids.
     * 
     * @return A String array of all the message Ids.
     */
    public String[] getMessageIds() {
        String[] ids;
        int loop = 0;

        synchronized (messageTable) {
            if (messageTable.size() == 0) {
                return null;
            }

            ids = new String[messageTable.size()];
            Iterator i = messageTable.iterator();
            while (i.hasNext()) {
                ids[loop++] = (String) i.next();
            }
        }

        return ids;
    }

    public int getBodyLength() {
        // 1 1-byte integer!
        int size = 1;
        synchronized (messageTable) {
            Iterator i = messageTable.iterator();
            while (i.hasNext()) {
                size += ((String) i.next()).length() + 1;
            }
        }

        return size;
    }

    /**
     * Write a byte representation of this packet to an OutputStream
     * 
     * @param out
     *            The OutputStream to write to
     * @throws java.io.IOException
     *             if there's an error writing to the output stream.
     */
    protected void encodeBody(OutputStream out) throws java.io.IOException {
        synchronized (messageTable) {
            int size = messageTable.size();
            SMPPIO.writeInt(size, 1, out);
            Iterator i = messageTable.iterator();
            while (i.hasNext()) {
                SMPPIO.writeCString((String) i.next(), out);
            }
        }
    }

    public void readBodyFrom(byte[] body, int offset)
            throws SMPPProtocolException {
        int msgCount = 0;
        msgCount = SMPPIO.bytesToInt(body, offset++, 1);

        for (int loop = 0; loop < msgCount; loop++) {
            String s = SMPPIO.readCString(body, offset);
            offset += s.length() + 1;
            messageTable.add(s);
        }
    }

    /**
     * Convert this packet to a String. Not to be interpreted programmatically,
     * it's just dead handy for debugging!
     */
    public String toString() {
        return new String("query_last_msgs_resp");
    }
}