How to use HashMap as a parameter in Web service

Question

I am trying to make a dynamic Web Service in which i will be expecting a Java hash map or an Array list for the argument.

I am using the following code in Class Code:

package demo;

import java.util.ArrayList;

import javax.jws.WebService;

@WebService
public class HashMapTest {
    public HashMapTest() {
        super();
    }

    public int getResponse(ArrayList<String> hm) {
        return hm.size();
    }
}

I am using an IDE: Oracle Jdeveloper 11g. when i use the Wizard in the same, the output WSDL is as given below:

<?xml version="1.0" encoding="UTF-8" ?>
<wsdl:definitions
     name="HashMapTestService"
     targetNamespace="http://demo/"
     xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"
     xmlns:tns="http://demo/"
     xmlns:xsd="http://www.w3.org/2001/XMLSchema"
     xmlns:mime="http://schemas.xmlsoap.org/wsdl/mime/"
     xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"
     xmlns:soap12="http://schemas.xmlsoap.org/wsdl/soap12/"
    >
    <wsdl:types>
    </wsdl:types>
    <wsdl:portType name="HashMapTest">
    </wsdl:portType>
    <wsdl:binding name="HashMapTestSoapHttp" type="tns:HashMapTest">
        <soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http"/>
    </wsdl:binding>
    <wsdl:service name="HashMapTestService">
        <wsdl:port name="HashMapTestPort" binding="tns:HashMapTestSoapHttp">
            <soap:address location="http://localhost:7101/DemoServer-Demo-context-root/HashMapTestPort"/>
        </wsdl:port>
    </wsdl:service>
</wsdl:definitions>

As easily seen, the WSDL is corrupt and cannot be used.

Is it just a bug in Jdeveloper or can we simply not use Collections API in Web service as a parameter?

Please help

Answer 1

this is caused by bug in JAXB . Use the following Code:

public class DTOObject
{ 
        HashMap hm = new HashMap();

    public void setHm(HashMap hm) {
        this.hm = hm;
    }

    public HashMap getHm() {
        return hm;
    }

    public int size() {
        return hm.size();
    }
}

and

public class HashMapTest {
    public HashMapTest() {
        super();
    }

    public int getResponse(Wrapped hm) {

        System.out.println(hm);
        return hm.size();
    }


}

It will solve the issue and create the wsdl correctly.

Answer 2

You can not use the Technology dependent type in Web Service . You should use String or Byte . If you want to pass collection as a argument then serialize it and pass it as argument in the form of bytes. At the other end create the instance of collection form bytes.