public int getAction() 
{
        return action;
}

 public SynapseXPath getExpression() 
{
        return expression;
}

 public QName getQName() 
{
        return qName;
}

 public String getValue() 
{
        return value;
}

 public boolean mediate(MessageContext synCtx) 
{
        boolean traceOn = isTraceOn(synCtx);
        boolean traceOrDebugOn = isTraceOrDebugOn(traceOn);
        if (traceOrDebugOn) {
            traceOrDebug(traceOn, "Start : Header mediator");
            if (traceOn && trace.isTraceEnabled()) {
                trace.trace("Message : " + synCtx.getEnvelope());
            }
        }
        if (action == ACTION_SET) {
            String value = (getExpression() == null ? getValue() :
                    expression.stringValueOf(synCtx));
            if (traceOrDebugOn) {
                traceOrDebug(traceOn, "Set SOAP header : " + qName + " to : " + value);
            }
            if (qName.getNamespaceURI() == null || "".equals(qName.getNamespaceURI())) {
                // is this a "well known" Synapse header?
                if (SynapseConstants.HEADER_TO.equals(qName.getLocalPart())) {
                    synCtx.setTo(new EndpointReference(value));
                } else if (SynapseConstants.HEADER_FROM.equals(qName.getLocalPart())) {
                    synCtx.setFrom(new EndpointReference(value));
                } else if (SynapseConstants.HEADER_ACTION.equals(qName.getLocalPart())) {
                    synCtx.setWSAAction(value);
                } else if (SynapseConstants.HEADER_FAULT.equals(qName.getLocalPart())) {
                    synCtx.setFaultTo(new EndpointReference(value));
                } else if (SynapseConstants.HEADER_REPLY_TO.equals(qName.getLocalPart())) {
                    synCtx.setReplyTo(new EndpointReference(value));
                } else if (SynapseConstants.HEADER_RELATES_TO.equals(qName.getLocalPart())) {
                    synCtx.setRelatesTo(new RelatesTo[] { new RelatesTo(value) });
                } else {
                    addCustomHeader(synCtx, value);
                }
            } else {
                addCustomHeader(synCtx, value);
            }
        } else {
             if (traceOrDebugOn) {
                traceOrDebug(traceOn, "Removing SOAP Header : " + qName);
            }
            if (qName.getNamespaceURI() == null || "".equals(qName.getNamespaceURI())) {
                // is this a "well known" Synapse header?
                if (SynapseConstants.HEADER_TO.equals(qName.getLocalPart())) {
                    synCtx.setTo(null);
                } else if (SynapseConstants.HEADER_FROM.equals(qName.getLocalPart())) {
                    synCtx.setFrom(null);
                } else if (SynapseConstants.HEADER_ACTION.equals(qName.getLocalPart())) {
                    synCtx.setWSAAction(null);
                } else if (SynapseConstants.HEADER_FAULT.equals(qName.getLocalPart())) {
                    synCtx.setFaultTo(null);
                } else if (SynapseConstants.HEADER_REPLY_TO.equals(qName.getLocalPart())) {
                    synCtx.setReplyTo(null);
                } else if (SynapseConstants.HEADER_RELATES_TO.equals(qName.getLocalPart())) {
                    synCtx.setRelatesTo(null);
                } else {
                    SOAPEnvelope envelope = synCtx.getEnvelope();
                    if (envelope != null) {
                        SOAPHeader header = envelope.getHeader();
                        if (header != null) {
                            removeFromHeaderList(header.
                                getHeaderBlocksWithNSURI(""));
                        }
                    }
                }
            } else {
                SOAPEnvelope envelope = synCtx.getEnvelope();
                if (envelope != null) {
                    SOAPHeader header = envelope.getHeader();
                    if (header != null) {
                        removeFromHeaderList(header.
                            getHeaderBlocksWithNSURI(qName.getNamespaceURI()));
                    }
                }
            }
        }
        if (traceOrDebugOn) {
            traceOrDebug(traceOn, "End : Header mediator");
        }
        return true;
}

Sets/Removes a SOAP header on the current message

 public  void setAction(int action) 
{
        this.action = action;
}

 public  void setExpression(SynapseXPath expression) 
{
        this.expression = expression;
}

 public  void setQName(QName qName) 
{
        this.qName = qName;
}

 public  void setValue(String value) 
{
        this.value = value;
}