org.marre.sms.SmsConcatMessage Maven / Gradle / Ivy
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
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*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is "SMS Library for the Java platform".
*
* The Initial Developer of the Original Code is Markus Eriksson.
* Portions created by the Initial Developer are Copyright (C) 2002
* the Initial Developer. All Rights Reserved.
*
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*
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package org.marre.sms;
import java.util.Random;
import java.util.concurrent.atomic.AtomicInteger;
/**
* Baseclass for messages that needs to be concatenated.
* - Only usable for messages that uses the same UDH fields for all message
* parts.
- This class could be better written. There are several parts
* that are copy- pasted.
- The septet coding could be a bit optimized.
*
*
* @author Markus Eriksson
* @version $Id$
*/
public abstract class SmsConcatMessage implements SmsMessage
{
private static final AtomicInteger rnd_ = new AtomicInteger((new Random()).nextInt(0xffff));
/**
* Creates an empty SmsConcatMessage.
*/
protected SmsConcatMessage()
{
// Empty
}
/**
* Returns the whole UD
*
* @return the UD
*/
public abstract SmsUserData getUserData();
/**
* Returns the udh elements
*
* The returned UDH is the same as specified when the message was created.
* No concat headers are added.
*
* @return the UDH as SmsUdhElements
*/
public abstract SmsUdhElement[] getUdhElements();
private int nextRandom(){
return rnd_.incrementAndGet()&0xff;
}
private SmsPdu[] createOctalPdus(SmsUdhElement[] udhElements, SmsUserData ud, int maxBytes)
{
int nMaxChars;
int nMaxConcatChars;
SmsPdu[] smsPdus = null;
// 8-bit concat header is 6 bytes...
nMaxConcatChars = maxBytes - 6;
nMaxChars = maxBytes;
if (ud.getLength() <= nMaxChars)
{
smsPdus = new SmsPdu[]{new SmsPdu(udhElements, ud)};
}
else
{
int refno = nextRandom();
// Calculate number of SMS needed
int nSms = ud.getLength() / nMaxConcatChars;
if ((ud.getLength() % nMaxConcatChars) > 0)
{
nSms += 1;
}
smsPdus = new SmsPdu[nSms];
// Calculate number of UDHI
SmsUdhElement[] pduUdhElements = null;
if (udhElements == null)
{
pduUdhElements = new SmsUdhElement[1];
}
else
{
pduUdhElements = new SmsUdhElement[udhElements.length + 1];
// Copy the UDH headers
System.arraycopy(udhElements, 0, pduUdhElements, 1, udhElements.length);
}
// Create pdus
for (int i = 0; i < nSms; i++)
{
byte[] pduUd;
int udBytes;
int udLength;
int udOffset;
// Create concat header
pduUdhElements[0] = SmsUdhUtil.get8BitConcatUdh(refno, nSms, i + 1);
// Create
// Must concatenate messages
// Calc pdu length
udOffset = nMaxConcatChars * i;
udBytes = ud.getLength() - udOffset;
if (udBytes > nMaxConcatChars)
{
udBytes = nMaxConcatChars;
}
udLength = udBytes;
pduUd = new byte[udBytes];
System.arraycopy(ud.getData(), udOffset, pduUd, 0, udBytes);
smsPdus[i] = new SmsPdu(pduUdhElements, pduUd, udLength, ud.getDcs());
}
}
return smsPdus;
}
private SmsPdu[] createUnicodePdus(SmsUdhElement[] udhElements, SmsUserData ud, int maxBytes)
{
int nMaxConcatChars;
SmsPdu[] smsPdus = null;
// 8-bit concat header is 6 bytes...
nMaxConcatChars = (maxBytes - 6) / 2;
if (ud.getLength() <= maxBytes)
{
smsPdus = new SmsPdu[]{new SmsPdu(udhElements, ud)};
}
else
{
int refno = nextRandom();
// Calculate number of SMS needed
int nSms = (ud.getLength() / 2) / nMaxConcatChars;
if (((ud.getLength() / 2) % nMaxConcatChars) > 0)
{
nSms += 1;
}
smsPdus = new SmsPdu[nSms];
// Calculate number of UDHI
SmsUdhElement[] pduUdhElements = null;
if (udhElements == null)
{
pduUdhElements = new SmsUdhElement[1];
}
else
{
pduUdhElements = new SmsUdhElement[udhElements.length + 1];
// Copy the UDH headers
System.arraycopy(udhElements, 0, pduUdhElements, 1, udhElements.length);
}
// Create pdus
for (int i = 0; i < nSms; i++)
{
byte[] pduUd;
int udBytes;
int udLength;
int udOffset;
// Create concat header
pduUdhElements[0] = SmsUdhUtil.get8BitConcatUdh(refno, nSms, i + 1);
// Create
// Must concatenate messages
// Calc pdu length
udOffset = nMaxConcatChars * i;
udLength = (ud.getLength() / 2) - udOffset;
if (udLength > nMaxConcatChars)
{
udLength = nMaxConcatChars;
}
udBytes = udLength * 2;
pduUd = new byte[udBytes];
System.arraycopy(ud.getData(), udOffset * 2, pduUd, 0, udBytes);
smsPdus[i] = new SmsPdu(pduUdhElements, pduUd, udBytes, ud.getDcs());
}
}
return smsPdus;
}
private SmsPdu[] createSeptetPdus(SmsUdhElement[] udhElements, SmsUserData ud, int maxBytes)
{
int nMaxChars;
int nMaxConcatChars;
SmsPdu[] smsPdus = null;
// 8-bit concat header is 6 bytes...
nMaxConcatChars = ((maxBytes - 6) * 8) / 7;
nMaxChars = (maxBytes * 8) / 7;
if (ud.getLength() <= nMaxChars)
{
smsPdus = new SmsPdu[]{new SmsPdu(udhElements, ud)};
}
else
{
int refno = nextRandom();
// Convert septets into a string...
String msg = SmsPduUtil.readSeptets(ud.getData());
if(msg.length()<=ud.getLength()){
//原字符串长度小于udLength ，说明存在GSM的转义字符
//计算转义字符个数,拆分后长度要减去转义字符
int cnt = SmsPduUtil.countGSMescapechar(msg);
nMaxConcatChars -= 2*cnt;
}
// Calculate number of SMS needed
int nSms = msg.length() / nMaxConcatChars;
if ((msg.length() % nMaxConcatChars) > 0)
{
nSms += 1;
}
smsPdus = new SmsPdu[nSms];
// Calculate number of UDHI
SmsUdhElement[] pduUdhElements = null;
if (udhElements == null)
{
pduUdhElements = new SmsUdhElement[1];
}
else
{
pduUdhElements = new SmsUdhElement[udhElements.length + 1];
// Copy the UDH headers
System.arraycopy(udhElements, 0, pduUdhElements, 1, udhElements.length);
}
// Create pdus
for (int i = 0; i < nSms; i++)
{
byte[] pduUd;
int udOffset;
int udLength;
// Create concat header
pduUdhElements[0] = SmsUdhUtil.get8BitConcatUdh(refno, nSms, i + 1);
// Create
// Must concatenate messages
// Calc pdu length
udOffset = nMaxConcatChars * i;
udLength = ud.getLength() - udOffset;
if (udLength > nMaxConcatChars)
{
udLength = nMaxConcatChars;
}
if(udOffset + udLength > msg.length()){
pduUd = SmsPduUtil.getSeptets(msg.substring(udOffset));
}else{
pduUd = SmsPduUtil.getSeptets(msg.substring(udOffset, udOffset + udLength));
}
smsPdus[i] = new SmsPdu(pduUdhElements, pduUd, udLength, ud.getDcs());
}
}
return smsPdus;
}
/**
* Converts this message into SmsPdu:s
*
* If the message is too long to fit in one SmsPdu the message is divided
* into many SmsPdu:s with a 8-bit concat pdu UDH element.
*
* @return Returns the message as SmsPdu:s
*/
public SmsPdu[] getPdus()
{
SmsPdu[] smsPdus;
SmsUserData ud = getUserData();
SmsUdhElement[] udhElements = getUdhElements();
int udhLength = SmsUdhUtil.getTotalSize(udhElements);
int nBytesLeft = SmsUdhUtil.PDUMAXLENGTH - udhLength;
switch (ud.getDcs().getAlphabet())
{
case GSM:
smsPdus = createSeptetPdus(udhElements, ud, nBytesLeft);
break;
case UCS2:
smsPdus = createUnicodePdus(udhElements, ud, nBytesLeft);
break;
case ASCII:
smsPdus = createOctalPdus(udhElements, ud, nBytesLeft+SmsUdhUtil.ASCIIMAXLENGTH-SmsUdhUtil.PDUMAXLENGTH);
break;
case LATIN1:
default:
smsPdus = createOctalPdus(udhElements, ud, nBytesLeft);
break;
}
return smsPdus;
}
}