import java.net.URL;

import java.util.Iterator;

import javax.xml.soap.MessageFactory;
import javax.xml.soap.MimeHeaders;
import javax.xml.soap.SOAPBody;
import javax.xml.soap.Name;
import javax.xml.soap.SOAPBodyElement;
import javax.xml.soap.SOAPConnection;
import javax.xml.soap.SOAPConnectionFactory;
import javax.xml.soap.SOAPElement;
import javax.xml.soap.SOAPFactory;
import javax.xml.soap.SOAPFault;
import javax.xml.soap.SOAPMessage;

/*
 * Client Class for Calculator based on only SAAJ API.
 *
 * ============================================
 * When          Who           What
 * ============================================
 * 2007-06-07    Olle Kullberg Created.
 * ============================================
 */

public class SAAJCalculatorClient {

    private final static String CALC_ENDPOINT_URL="http://localhost:8080/calculator/Calculator";
    private final static String CALC_NAMESPACE = "http://www.programmera.net/ws/Calculator";

    public static void main (String[] args) throws Exception {
    
        System.out.println("====================================");
        System.out.println("Main 1. Check parameters");
        System.out.println("====================================");
        
        // First chech nr of args.
        if (args.length != 3){
            System.err.println("Method is DIV or MUL.");
            System.err.println("Arguments must be integers.");
            System.exit(2);
        }
        
        int a1=0;
        int a2=0;
        String command="NONE";
        float floatRes=0;
        
        // First try to convert the 2 last arguments
        try{
            command= args[0];
            a1= Integer.parseInt(args[1]);
            a2= Integer.parseInt(args[2]);
        }catch(Exception e){
            System.err.println("Usage: java SAAJCalculatorClient method arg1 arg2");
            System.err.println("Method is DIV or MUL.");
            System.err.println("Arguments must be integers.");
            System.exit(2);
        }
        
        // Check if command is ok
        String operationStr="", partStr="", param1Str="", param2Str="";
        
        if ( command.equalsIgnoreCase("MUL") ){
            System.out.println("Operation is multiplication.");
            operationStr="multiplication";
            partStr="multiplicationRequestPart";
            param1Str="multiplicand";
            param2Str="multiplier";
        }else if ( command.equalsIgnoreCase("DIV")){
            System.out.println("Operation is division.");
            operationStr="division";
            partStr="divisionRequestPart";
            param1Str="dividend";
            param2Str="divisor";
        }else{
            System.err.println ("Usage: java Main method arg1 arg2");
            System.err.println ("Method must be: MUL or DIV.");
            System.exit(2);
        }
        
        
        System.out.println("====================================");
        System.out.println("Main 2. Build SOAP message.");
        System.out.println("====================================");
        SOAPFactory soapFactory = SOAPFactory.newInstance();
        MessageFactory msgFactory= MessageFactory.newInstance();
        SOAPMessage message = msgFactory.createMessage();
        
        
        System.out.println("1. Detach the SOAP header.");
        message.getSOAPHeader().detachNode();
        
        System.out.println("2. Create SOAP body.");
        SOAPBody body = message.getSOAPBody();
        
        System.out.println("3. Add the operation element (division).");
        Name operationName = soapFactory.createName(operationStr,"cal",CALC_NAMESPACE);
        SOAPBodyElement operationBE= body.addBodyElement(operationName);
        
        System.out.println("4. Add the request part element.");
        Name requestPartName = soapFactory.createName(partStr);
        SOAPElement requestPartE = operationBE.addChildElement(requestPartName);
        
        System.out.println("5. Add the first parameter element.");
        Name parameter1Name = soapFactory.createName(param1Str);
        SOAPElement parameter1E = requestPartE.addChildElement(parameter1Name);
        parameter1E.addTextNode(a1+"");
        
        System.out.println("6. Add the second parameter element.");
        Name parameter2Name = soapFactory.createName(param2Str);
        SOAPElement parameter2E = requestPartE.addChildElement(parameter2Name);
        parameter2E.addTextNode(a2+"");
        
        // This is a fix if the SOAPAction header is not set.
        // Axis, for example, does this automatically.
        System.out.println("7. Add empty SOAPAction mime header.");
        MimeHeaders mimeHeader  = message.getMimeHeaders();
        mimeHeader.addHeader("SOAPAction","");
        
        System.out.println("8. SOAP message finished, print it:");
        message.writeTo(System.out);
        
        
        System.out.println("");
        System.out.println("====================================");
        System.out.println("Main 3. Send request");
        System.out.println("====================================");
        
        System.out.println("1. Create SOAP connection factory.");
        SOAPConnectionFactory connectionFactory = SOAPConnectionFactory.newInstance();
        
        System.out.println("2. Create SOAP connection.");
        SOAPConnection connection =connectionFactory.createConnection();
        
        SOAPMessage response=null;
        if(connection != null){
            System.out.println("3. Call enpoint URL="+CALC_ENDPOINT_URL);
            response = connection.call(message, new URL(CALC_ENDPOINT_URL));
            System.out.println("Response retrieved.");
        }else{
            System.err.println("No connection to "+CALC_ENDPOINT_URL);
        }
        
        System.out.println("====================================");
        System.out.println("Main 4. Fetch Response");
        System.out.println("====================================");
              
        response.writeTo(System.out);
        System.out.println("");
        if(response != null){
            SOAPBody respBody= response.getSOAPBody();
        
            if (respBody.hasFault()){
                System.err.println("Is fault");
                SOAPFault respFault = respBody.getFault();
                System.err.println("fault code= "+respFault.getFaultCode());
                System.err.println("fault string= "+respFault.getFaultString());
                System.err.println("fault detail= "+respFault.getDetail().getTextContent());
                System.exit(2);
            }else{
                Iterator iter1 = respBody.getChildElements();
                if( iter1.hasNext()){
                    SOAPElement element1= (SOAPElement) iter1.next();
                    Iterator iter2= element1.getChildElements();
                    if ( iter2.hasNext()){
                        SOAPElement  element2= (SOAPElement) iter2.next();
                        String result= element2.getValue();
                        System.out.println("Result="+result);
                    }else{
                        System.err.println("Response malformed.");
                    }
                }else{
                    System.err.println("Response malformed.");
                }
            }
        }else{
            System.err.println("No response delivered!");
        }
           
        System.out.println("Program finished!");
    }
    
    
}