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/*
* Conditions Of Use
*
* This software was developed by employees of the National Institute of
* Standards and Technology (NIST), an agency of the Federal Government.
* Pursuant to title 15 Untied States Code Section 105, works of NIST
* employees are not subject to copyright protection in the United States
* and are considered to be in the public domain.  As a result, a formal
* license is not needed to use the software.
*
* This software is provided by NIST as a service and is expressly
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* of the terms of this agreement
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* .
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/******************************************************************************
 * Product of NIST/ITL Advanced Networking Technologies Division (ANTD).      *
 ******************************************************************************/
package android.gov.nist.javax.sip.header;

import android.gov.nist.javax.sip.message.SIPRequest;

import android.javax.sip.InvalidArgumentException;
import android.javax.sip.header.CSeqHeader;
import java.text.ParseException;

/**
 *  CSeq SIP Header.
 *
 * @author M. Ranganathan    
* @version 1.2 $Revision: 1.11 $ $Date: 2010-05-06 14:07:48 $ * @since 1.1 * */ public class CSeq extends SIPHeader implements android.javax.sip.header.CSeqHeader { /** * Comment for serialVersionUID */ private static final long serialVersionUID = -5405798080040422910L; /** * seqno field */ protected Long seqno; /** * method field */ protected String method; /** * Constructor. */ public CSeq() { super(CSEQ); } /** * Constructor given the sequence number and method. * * @param seqno is the sequence number to assign. * @param method is the method string. */ public CSeq(long seqno, String method) { this(); this.seqno = Long.valueOf(seqno); this.method = SIPRequest.getCannonicalName(method); } /** * Compare two cseq headers for equality. * @param other Object to compare against. * @return true if the two cseq headers are equals, false * otherwise. */ public boolean equals(Object other) { if (other instanceof CSeqHeader) { final CSeqHeader o = (CSeqHeader) other; return this.getSeqNumber() == o.getSeqNumber() && this.getMethod().equals( o.getMethod() ); } return false; } /** * Return canonical encoded header. * @return String with canonical encoded header. */ public String encode() { return headerName + COLON + SP + encodeBody() + NEWLINE; } /** * Return canonical header content. (encoded header except headerName:) * * @return encoded string. */ public String encodeBody() { return encodeBody(new StringBuilder()).toString(); } protected StringBuilder encodeBody(StringBuilder buffer) { return buffer.append(seqno).append(SP).append(method.toUpperCase()); } /** * Get the method. * @return String the method. */ public String getMethod() { return method; } /* * (non-Javadoc) * @see android.javax.sip.header.CSeqHeader#setSequenceNumber(long) */ public void setSeqNumber(long sequenceNumber) throws InvalidArgumentException { if (sequenceNumber < 0 ) throw new InvalidArgumentException( "JAIN-SIP Exception, CSeq, setSequenceNumber(), " + "the sequence number parameter is < 0 : " + sequenceNumber); else if ( sequenceNumber > ((long)1)<<32 - 1) throw new InvalidArgumentException( "JAIN-SIP Exception, CSeq, setSequenceNumber(), " + "the sequence number parameter is too large : " + sequenceNumber); seqno = Long.valueOf(sequenceNumber); } /** * For backwards compatibility */ public void setSequenceNumber(int sequenceNumber) throws InvalidArgumentException { this.setSeqNumber( (long) sequenceNumber ); } /* * (non-Javadoc) * @see android.javax.sip.header.CSeqHeader#setMethod(java.lang.String) */ public void setMethod(String meth) throws ParseException { if (meth == null) throw new NullPointerException( "JAIN-SIP Exception, CSeq" + ", setMethod(), the meth parameter is null"); this.method = SIPRequest.getCannonicalName(meth); } /* * (non-Javadoc) * @see android.javax.sip.header.CSeqHeader#getSequenceNumber() */ public int getSequenceNumber() { if (this.seqno == null) return 0; else return this.seqno.intValue(); } public long getSeqNumber() { return this.seqno.longValue(); } }




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