DynamicInvoker

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.Vector;

import javax.wsdl.Binding;
import javax.wsdl.Operation;
import javax.wsdl.Port;
import javax.wsdl.Service;
import javax.xml.namespace.QName;
import javax.xml.rpc.Call;
import javax.xml.rpc.encoding.Deserializer;
import javax.xml.rpc.encoding.DeserializerFactory;

import org.apache.axis.Constants;
import org.apache.axis.encoding.ser.SimpleDeserializer;
import org.apache.axis.wsdl.gen.Parser;
import org.apache.axis.wsdl.symbolTable.BaseType;
import org.apache.axis.wsdl.symbolTable.BindingEntry;
import org.apache.axis.wsdl.symbolTable.Parameter;
import org.apache.axis.wsdl.symbolTable.Parameters;
import org.apache.axis.wsdl.symbolTable.ServiceEntry;
import org.apache.axis.wsdl.symbolTable.SymTabEntry;
import org.apache.axis.wsdl.symbolTable.SymbolTable;
import org.apache.axis.wsdl.symbolTable.TypeEntry;
import org.apache.log4j.Logger;



/**
 * Web Service Dynamic Invoker
 */
public class DynamicInvoker {
	
	private static Logger logger = Logger.getLogger(DynamicInvoker.class);
	
    private Parser wsdlParser = null;

    private Map services = null;

    public DynamicInvoker(String wsdlURL) throws Exception {
       
    	wsdlParser = new Parser();
        try{
        	
        	wsdlParser.run(wsdlURL);
        
        }catch(Exception e){
        	e.printStackTrace();
        }    	
        services = enumSymTabEntry(ServiceEntry.class);
    }

    public Map invoke(String serviceName, String portName,
            String operationName, Vector parameterValues) throws Exception {
    	logger.info("--------"+serviceName+"-----"+portName+"-----"+operationName+"---------begin-------");
    	logger.info(parameterValues.toString());
    	logger.info("--------"+serviceName+"-----"+portName+"-----"+operationName+"---------end-------");
        Vector inputs = new Vector();
        String returnName = null;

        ServiceEntry serviceEntry = (ServiceEntry) services.get(serviceName);
        Service service = serviceEntry.getService();
        org.apache.axis.client.Service clientService = new org.apache.axis.client.Service(
                wsdlParser, service.getQName());

        Call call = clientService.createCall(QName.valueOf(portName), QName
                .valueOf(operationName));
        ((org.apache.axis.client.Call) call).setTimeout(new Integer(50 * 1000));
 
        BindingEntry bindingEntry = getBindingEntry(serviceName, portName);
        Operation o = getOperation(bindingEntry, operationName);
        Parameters parameters = bindingEntry.getParameters(o);

        if (parameters.returnParam != null) {
            QName returnType = org.apache.axis.wsdl.toJava.Utils
                    .getXSIType(parameters.returnParam);
            QName returnQName = parameters.returnParam.getQName();
            returnName = returnQName.getLocalPart();
        }

        int size = parameters.list.size();
        for (int i = 0; i < size; i++) {
            Parameter p = (Parameter) parameters.list.get(i);
            switch (p.getMode()) {
            case Parameter.IN:
                inputs.add(getParamData((org.apache.axis.client.Call) call, p,
                        (String) parameterValues.elementAt(i)));
                break;
            case Parameter.OUT:
                break;
            case Parameter.INOUT:
                inputs.add(getParamData((org.apache.axis.client.Call) call, p,
                        (String) parameterValues.elementAt(i)));
                break;
            }
        }

        Object ret = call.invoke(inputs.toArray());
        Map outputs = call.getOutputParams();
        HashMap map = new HashMap();
        if (ret != null && returnName != null) {
            map.put(returnName, ret);
        }
        if (outputs != null) {
            for (Iterator i = outputs.keySet().iterator(); i.hasNext();) {
                Object obj = i.next();
                String name;
                Object value;
                if (obj.getClass().getName().equals("java.lang.String")) {
                    name = (String) obj;
                } else {
                    name = ((QName) obj).getLocalPart();
                }
                value = outputs.get(obj);
                map.put(name, value);
            }
        }
        logger.info("--------"+serviceName+"-----"+portName+"-----"+operationName+"---------result begin-------");
        logger.info(map.toString());
        logger.info("--------"+serviceName+"-----"+portName+"-----"+operationName+"---------result end-------");
        return map;
    }

    public Vector enumServiceNames() {
        Vector v = new Vector();
        Iterator i = services.keySet().iterator();
        while (i.hasNext()) {
            String s = (String) i.next();
            v.addElement(s);
        }
        return v;
    }

    public Vector enumPortNames(String serviceName) {
        Vector v = new Vector();
        ServiceEntry serviceEntry = (ServiceEntry) services.get(serviceName);
        Map ports = serviceEntry.getService().getPorts();
        Iterator i = ports.keySet().iterator();
        while (i.hasNext()) {
            String s = (String) i.next();
            v.addElement(s);
        }
        return v;
    }

    public Vector enumOperationNames(String serviceName, String portName) {
        Vector v = new Vector();
        BindingEntry entry = getBindingEntry(serviceName, portName);
        Set operations = entry.getOperations();
        Iterator i = operations.iterator();
        while (i.hasNext()) {
            Operation o = (Operation) i.next();
            String s = o.getName();
            v.addElement(s);
        }
        return v;
    }

    public Parameters enumParameters(String serviceName, String portName,
            String operationName) {
        BindingEntry entry = getBindingEntry(serviceName, portName);
        Operation o = getOperation(entry, operationName);
        Parameters parameters = entry.getParameters(o);
        return parameters;
    }

    public String getParameterModeString(Parameter p) {
        String ret = null;
        switch (p.getMode()) {
        case Parameter.IN:
            ret = "[IN]";
            break;
        case Parameter.INOUT:
            ret = "[IN, OUT]";
            break;
        case Parameter.OUT:
            ret = "[OUT]";
            break;
        }
        return ret;
    }

    private BindingEntry getBindingEntry(String serviceName, String portName) {
        ServiceEntry serviceEntry = (ServiceEntry) services.get(serviceName);
        Port port = serviceEntry.getService().getPort(portName);
        Binding binding = port.getBinding();
        SymbolTable table = wsdlParser.getSymbolTable();
        return table.getBindingEntry(binding.getQName());
    }

    private Operation getOperation(BindingEntry entry, String operationName) {
        Set operations = entry.getOperations();
        Iterator i = operations.iterator();
        while (i.hasNext()) {
            Operation o = (Operation) i.next();
            if (operationName.equals(o.getName())) {
                return o;
            }
        }
        return null;
    }


    /**
     * return Map of <QName.getLocalPart, SymTabEntry>
     */
    private Map enumSymTabEntry(Class cls) {
        HashMap ret = new HashMap();
        HashMap map = wsdlParser.getSymbolTable().getHashMap();
        Iterator iterator = map.entrySet().iterator();
        while (iterator.hasNext()) {
            Map.Entry entry = (Map.Entry) iterator.next();
            QName key = (QName) entry.getKey();
            Vector v = (Vector) entry.getValue();
            int size = v.size();
            for (int i = 0; i < size; ++i) {
                SymTabEntry symTabEntry = (SymTabEntry) v.elementAt(i);
                if (cls.isInstance(symTabEntry)) {
                    ret.put(key.getLocalPart(), symTabEntry);
                }
            }
        }
        return ret;
    }

    private Object getParamData(org.apache.axis.client.Call c, Parameter p,
            String arg) throws Exception {
        // Get the QName representing the parameter type
        QName paramType = org.apache.axis.wsdl.toJava.Utils.getXSIType(p);

        TypeEntry type = p.getType();
        if (type instanceof BaseType && ((BaseType) type).isBaseType()) {
            DeserializerFactory factory = c.getTypeMapping().getDeserializer(
                    paramType);
            Deserializer deserializer = factory
                    .getDeserializerAs(Constants.AXIS_SAX);
            if (deserializer instanceof SimpleDeserializer) {
                return ((SimpleDeserializer) deserializer).makeValue(arg);
            }
        }
        throw new RuntimeException("Can not convert '" + arg
                + "' into " + c);
    }
}