WSDL2Java Question

[vjy chin]

I just started using Webservices, so please excuse me if I missed something obvious.

I have the wsdl url. I need to pass the url to a java class and to generate the java class with the wsdl, so i can get the interface with all the method names. Is there anyway we can do this, so I can get the list of methods as a map or something.

As of now I use WSDL2Java in command line and the java file is created and stored in y machine. But I need to do this in java.

Many use only ANT scripts to do this, but as per my requirement we cannot use ANT.

My .jws file is

public class HelloWorldService
{
public String HelloWorld(String data)
{
return "Hello World! You sent the string '" + data + "'.";
}

public String createUser(String id)
{
return "Created User '" + id + "'.";
}

public String getUser(String id)
{
return "Returned User '" + id + "'.";
}

public String listAll()
{
return "All Users Returned";
}

public String enableUser(String id)
{
return "Enabled User '" + id + "'.";
}


public String testUser(String id)
{
return "Tested User '" + id + "'.";
}

}    

So I executed

C:\>java org.apache.axis.wsdl.WSDL2Java <a href="http://localhost:8080/axis/HelloWorldService.jws?wsdl" target="_blank" rel="nofollow">http://localhost:8080/axis/HelloWorldService.jws?wsdl</a>    

and I got HelloWorldService.java in my machine.

/**
 * HelloWorldService.java
 *
 * This file was auto-generated from WSDL
 * by the Apache Axis 1.4 Apr 22, 2006 (06:55:48 PDT) WSDL2Java emitter.
 */
 
package localhost.axis.HelloWorldService_jws;
 
public interface HelloWorldService extends java.rmi.Remote {
    public java.lang.String createUser(java.lang.String id) throws java.rmi.RemoteException;
    public java.lang.String getUser(java.lang.String id) throws java.rmi.RemoteException;
    public java.lang.String testUser(java.lang.String id) throws java.rmi.RemoteException;
    public java.lang.String enableUser(java.lang.String id) throws java.rmi.RemoteException;
    public java.lang.String helloWorld(java.lang.String data) throws java.rmi.RemoteException;
    public java.lang.String listAll() throws java.rmi.RemoteException;
}
    

Is there any way I can get only the method names from this class. I need to display this information.

Thanks.

[Peer Reynders]

You should probably use
JAX-RPC: Dynamic Invocation Interface (DII) or JAX-WS: javax.xml.ws.Dispatch client
instead.

To read the WSDL simply read it through an HTTP connection and then extract the information that you need directly from it.

The classes generated by WSDL2Java should not be used as a canonical representation of the service interface - they are simply a convenience java adapter for a static (i.e. non-changing) endpoint definition.

As you are dynamically exploring the WSDL you should stick to the definition found within the WSDL which is the actual service contract - not some approximated translation as provided by WSDL2Java.
[ September 25, 2007: Message edited by: Peer Reynders ]

[vjy chin]

Thanks for your response.

So you mean I do not need to use WSDL2Java at all. I also have a Client with which I accessed the wsdl.

import java.net.MalformedURLException;
import java.net.URL;
import java.rmi.RemoteException;
import java.util.*;
 
import javax.xml.namespace.QName;
import javax.xml.rpc.ServiceException;
 
import org.apache.axis.client.Call;
import org.apache.axis.client.Service;
import org.apache.axis.wsdl.toJava.*;
 
public class HelloWorldClient
{
public static void main(String[] args) throws ServiceException, MalformedURLException, RemoteException
{
 
Service service = new Service();
 
Call call = (Call)service.createCall();
call.setTargetEndpointAddress(new URL("http://localhost:8080/axis/HelloWorldService.jws"));
call.setOperationName(new QName("http://soapinterop.org/", "HelloWorld"));
 
String returnValue = (String)call.invoke(new Object[]{"Test Message."});
System.out.println(returnValue);
 

 
}
}    

I was also able to see the output.

To read the WSDL simply read it through an HTTP connection and then extract the information that you need directly from it.

Could you explain this a bit more. Are you saying that I need to parse the xml and look for the tag "wsdl:message" in <wsdl:message name="HelloWorldRequest">
<wsdl art name="data" type="xsd:string" />
</wsdl:message>

Am I correct or did I miss something.

Thanks again.

P.S. I am looking at the 2nd link you gave as the first was kind of similar to what I did.

[Peer Reynders]

Originally posted by vjy chin:
Are you saying that I need to parse the xml and look for the tag "wsdl:message" in <wsdl:message name="HelloWorldRequest">
<wsdl art name="data" type="xsd:string" />
</wsdl:message>

Yes. However you are not looking for "wsdl:message" you are looking for "{http://schemas.xmlsoap.org/wsdl/}message" - that is, you need to be namespace aware. So it is probably easier with XPath. For an example see here.

Ronald Bourret: XML Namespaces FAQ
James Clark: XML Namespaces

[vjy chin]

Thanks for the response.

I could not go through the links fully. I would do that ASAP.

I tried running the example you had written and I was not able to run it. I changed a bit.

package com.waveset.adapter;
 
import java.io.StringReader;
import org.xml.sax.InputSource;
import org.w3c.dom.NodeList; 
import org.w3c.dom.Node; 
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathFactory;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathExpression;
 
import javax.xml.namespace.NamespaceContext;
import java.util.Iterator;
import java.util.Map;
import java.util.HashMap;
import java.util.Set;
import java.util.ArrayList;
import java.util.List;
 
class MyNamespaceContext implements NamespaceContext {
    private Map<String,String> map;
    public MyNamespaceContext() {
        map = new HashMap<String,String>();
    }
    public void setNamespace(String prefix, String namespaceURI) {
        map.put(prefix, namespaceURI);
    }
    public String getNamespaceURI(String prefix) {
        // !!! doesn't fully follow getNamespaceURI API spec !!!
        return (String) map.get(prefix);
    }
    public String getPrefix(String namespaceURI) {
        // !!! doesn't fully follow getPrefix API spec !!!
        Set keys = map.keySet();
        for (Iterator iterator = keys.iterator(); iterator.hasNext()  :wink:    {
            String prefix = (String) iterator.next();
            String uri = (String) map.get(prefix);
            if (uri.equals(namespaceURI)) return prefix;
        }
        return null;
    }
    public Iterator getPrefixes(String namespaceURI) {
        // !!! doesn't fully follow getPrefixes API spec !!!
        List<String> prefixes = new ArrayList<String>();
        Set keys = map.keySet();
        for (Iterator iterator = keys.iterator(); iterator.hasNext()  :wink:     {
            String prefix = (String) iterator.next();
            String uri = (String) map.get(prefix);
            if (uri.equals(namespaceURI)) prefixes.add(prefix);
        }
        return prefixes.iterator();
    }
}
 
public class Test {
    
    public static void main( String[] args ) throws Exception {
 
   
    String xmlSource = "<xs:schema xmlns:xs=\"http://www.w3.org/2001/XMLSchema\" "
    + " xmlns:wsdl=\"http://schemas.xmlsoap.org/wsdl/\" "
    + " targetNamespace=\"http://schemas.xmlsoap.org/wsdl/\" " +
    "elementFormDefault=\"qualified\" > <xs:element name=\"definitions\" " +
    "type=\"wsdl:tDefinitions\" > <xs:key name=\"message\"> " +
    "<xs:selector xpath=\"wsdl:message\"/> <xs:field xpath=\"@name\" /> " +
    "</xs:key> </xs:element></xs:schema>";
    
 
        XPathFactory factory    = XPathFactory.newInstance();
        XPath xPath             = factory.newXPath();
        InputSource inputSource = new InputSource( new StringReader(xmlSource) );
 
/*      Pure XPath expression solution
        String expression = "/*[namespace-uri()='http://schemas.xmlsoap.org/soap/envelope/' and local-name()='Envelope']"
                + "/*[namespace-uri()='http://schemas.xmlsoap.org/soap/envelope/' and local-name()='Body']"
                + "/*[namespace-uri()='http://schemas.vanguard.com/StockQuote' and local-name()='GetQuoteRequest']"
                + "/symbol/child::text()";
*/
 
        // Alternative 2 - generate XPath expanded-names via NamespaceContext interface
        MyNamespaceContext nsc = new MyNamespaceContext();
        // Use prefixes used in the query - NOT the ones in the document
        //nsc.setNamespace( "soap", "http://schemas.xmlsoap.org/soap/envelope/" );
        //nsc.setNamespace( "stockq", "http://schemas.vanguard.com/StockQuote" );
        nsc.setNamespace( "wsdl", "http://schemas.xmlsoap.org/wsdl/" );   //---- Is this correct? If not how should I do this for my example
        xPath.setNamespaceContext( nsc );
        String expression = "/soap:Envelope/soap:Body/stockq:GetQuoteRequest/symbol/child::text()";//---- What value should I set for this and how do I determine the value.
        // End Alternative 2 
 
        XPathExpression xpathExpression = xPath.compile( expression );
        NodeList nodes = (NodeList) xpathExpression.evaluate( inputSource, XPathConstants.NODESET );
        if (nodes.getLength() < 1) return;
 
        Node node = nodes.item( 0 );
        System.out.println("Node Name : " + node.getNodeName());
        System.out.println("Node Value : " + node.getNodeValue());
    }
}    

[ September 25, 2007: Message edited by: vjy chin ]

[Peer Reynders]

Originally posted by vjy chin:
I tried running the example you had written and I was not able to run it. I changed a bit.

The XPath libraries have are only standard with Java 1.5.
With 1.4 you have to use Xalan's XPathAPI which works a bit differently.

Xalan

[vjy chin]

Thanks again. I am using Java 1.5 version. Actually I had the questions in the code part. I apologize for not mentioning it.

Please look at the code part, I have added my questions in the code part

// Alternative 2 - generate XPath expanded-names via NamespaceContext interface
        MyNamespaceContext nsc = new MyNamespaceContext();
        // Use prefixes used in the query - NOT the ones in the document
        //nsc.setNamespace( "soap", "http://schemas.xmlsoap.org/soap/envelope/" );
        //nsc.setNamespace( "stockq", "http://schemas.vanguard.com/StockQuote" );
        nsc.setNamespace( "wsdl", "http://schemas.xmlsoap.org/wsdl/" );   //---- Is this correct? If not how should I do this for my example
        xPath.setNamespaceContext( nsc );
        String expression = "/soap:Envelope/soap:Body/stockq:GetQuoteRequest/symbol/child::text()";//---- What value should I set for this and how do I determine the value.
        // End Alternative 2     

Thanks again.

[Peer Reynders]

Originally posted by vjy chin:
Is this correct? If not how should I do this for my example

Yes, provided you use "wsdl" as the prefix in your XPath query and the WSDL complies with WSDL 1.0.
For WSDL 2.0 you have to use "http://www.w3.org/ns/wsdl".

What value should I set for this and how do I determine the value.

Well, you are going to need multiple expressions - so its time to brush up on XPath

"/wsdl:definitions/wsdl:messages/attribute::name/child::text()"
or
"/wsdl:definitions/wsdl:messages/@name/text()"

Should give you a org.w3c.dom.NodeList of the message names (haven't tested it though).

However these messages are only part of a "web operation" within the WSDL if

The message name is referenced in a portType's operation definition.

That operation is bound in a binding.

The binding is used in the service's port definition.

(reality is even a bit more complicated than that).
What you are really interested in are the binding's operation names.

You will need to change the content of that xmlSource variable - that needs to be the WSDL itself.
[ September 25, 2007: Message edited by: Peer Reynders ]

[vjy chin]

Thanks for the reply.

I actually got something working though not much. I have completely removed the name spaces and I am looking only for certain attributes.

The xml file which I have from the URL is

<?xml version="1.0" encoding="UTF-8"?>
<wsdl:definitions targetNamespace="http://localhost:8080/axis/HelloWorldService.jws"
 xmlns:apachesoap="http://xml.apache.org/xml-soap" 
xmlns:impl="http://localhost:8080/axis/HelloWorldService.jws" 
xmlns:intf="http://localhost:8080/axis/HelloWorldService.jws" 
xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" 
xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" 
xmlns:wsdlsoap="http://schemas.xmlsoap.org/wsdl/soap/" 
xmlns:xsd="http://www.w3.org/2001/XMLSchema">
 
<!--WSDL created by Apache Axis version: 1.4
Built on Apr 22, 2006 (06:55:48 PDT)-->
 
   <wsdl:message name="enableUserRequest">
 
      <wsdl:part name="id" type="xsd:string"/>
 
   </wsdl:message>
 
   <wsdl:message name="getUserResponse">
 
      <wsdl:part name="getUserReturn" type="xsd:string"/>
 
   </wsdl:message>
 
   <wsdl:message name="getUserRequest">
 
      <wsdl:part name="id" type="xsd:string"/>
 
   </wsdl:message>
 
   <wsdl:message name="createUserResponse">
 
      <wsdl:part name="createUserReturn" type="xsd:string"/>
 
   </wsdl:message>
 
   <wsdl:message name="listAllRequest">
 
   </wsdl:message>
 
   <wsdl:message name="enableUserResponse">
 
      <wsdl:part name="enableUserReturn" type="xsd:string"/>
 
   </wsdl:message>
 
   <wsdl:message name="HelloWorldRequest">
 
      <wsdl:part name="data" type="xsd:string"/>
 
   </wsdl:message>
 
   <wsdl:message name="createUserRequest">
 
      <wsdl:part name="id" type="xsd:string"/>
 
   </wsdl:message>
 
   <wsdl:message name="listAllResponse">
 
      <wsdl:part name="listAllReturn" type="xsd:string"/>
 
   </wsdl:message>
 
   <wsdl:message name="HelloWorldResponse">
 
      <wsdl:part name="HelloWorldReturn" type="xsd:string"/>
 
   </wsdl:message>
 
   <wsdl:portType name="HelloWorldService">
 
      <wsdl:operation name="createUser" parameterOrder="id">
 
         <wsdl:input message="impl:createUserRequest" name="createUserRequest"/>
 
         <wsdl:output message="impl:createUserResponse" name="createUserResponse"/>
 
      </wsdl:operation>
 
      <wsdl:operation name="getUser" parameterOrder="id">
 
         <wsdl:input message="impl:getUserRequest" name="getUserRequest"/>
 
         <wsdl:output message="impl:getUserResponse" name="getUserResponse"/>
 
      </wsdl:operation>
 
      <wsdl:operation name="enableUser" parameterOrder="id">
 
         <wsdl:input message="impl:enableUserRequest" name="enableUserRequest"/>
 
         <wsdl:output message="impl:enableUserResponse" name="enableUserResponse"/>
 
      </wsdl:operation>
 
      <wsdl:operation name="HelloWorld" parameterOrder="data">
 
         <wsdl:input message="impl:HelloWorldRequest" name="HelloWorldRequest"/>
 
         <wsdl:output message="impl:HelloWorldResponse" name="HelloWorldResponse"/>
 
      </wsdl:operation>
 
      <wsdl:operation name="listAll">
 
         <wsdl:input message="impl:listAllRequest" name="listAllRequest"/>
 
         <wsdl:output message="impl:listAllResponse" name="listAllResponse"/>
 
      </wsdl:operation>
 
   </wsdl:portType>
 
   <wsdl:binding name="HelloWorldServiceSoapBinding" type="impl:HelloWorldService">
 
      <wsdlsoap:binding style="rpc" transport="http://schemas.xmlsoap.org/soap/http"/>
 
      <wsdl:operation name="createUser">
 
         <wsdlsoap:operation soapAction=""/>
 
         <wsdl:input name="createUserRequest">
 
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://DefaultNamespace" use="encoded"/>
 
         </wsdl:input>
 
         <wsdl:output name="createUserResponse">
 
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://localhost:8080/axis/HelloWorldService.jws" use="encoded"/>
 
         </wsdl:output>
 
      </wsdl:operation>
 
      <wsdl:operation name="getUser">
 
         <wsdlsoap:operation soapAction=""/>
 
         <wsdl:input name="getUserRequest">
 
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://DefaultNamespace" use="encoded"/>
 
         </wsdl:input>
 
         <wsdl:output name="getUserResponse">
 
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://localhost:8080/axis/HelloWorldService.jws" use="encoded"/>
 
         </wsdl:output>
 
      </wsdl:operation>
 
      <wsdl:operation name="enableUser">
 
         <wsdlsoap:operation soapAction=""/>
 
         <wsdl:input name="enableUserRequest">
 
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://DefaultNamespace" use="encoded"/>
 
         </wsdl:input>
 
         <wsdl:output name="enableUserResponse">
 
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://localhost:8080/axis/HelloWorldService.jws" use="encoded"/>
 
         </wsdl:output>
 
      </wsdl:operation>
 
      <wsdl:operation name="HelloWorld">
 
         <wsdlsoap:operation soapAction=""/>
 
         <wsdl:input name="HelloWorldRequest">
 
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://DefaultNamespace" use="encoded"/>
 
         </wsdl:input>
 
         <wsdl:output name="HelloWorldResponse">
 
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://localhost:8080/axis/HelloWorldService.jws" use="encoded"/>
 
         </wsdl:output>
 
      </wsdl:operation>
 
      <wsdl:operation name="listAll">
 
         <wsdlsoap:operation soapAction=""/>
 
         <wsdl:input name="listAllRequest">
 
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://DefaultNamespace" use="encoded"/>
 
         </wsdl:input>
 
         <wsdl:output name="listAllResponse">
 
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://localhost:8080/axis/HelloWorldService.jws" use="encoded"/>
 
         </wsdl:output>
 
      </wsdl:operation>
 
   </wsdl:binding>
 
   <wsdl:service name="HelloWorldServiceService">
 
      <wsdl:port binding="impl:HelloWorldServiceSoapBinding" name="HelloWorldService">
 
         <wsdlsoap:address location="http://localhost:8080/axis/HelloWorldService.jws"/>
 
      </wsdl:port>
 
   </wsdl:service>
 
</wsdl:definitions>
    

As of not I am only going to be looking for wsdl:message attributes.

The code I have is a little modified version of yours.

 public class Test {
    
    public static void main( String[] args ) throws Exception {
    
        DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
        Document document = builder.parse("http://schemas.xmlsoap.org/wsdl/");
        document = builder.parse("http://localhost:8080/axis/HelloWorldService.jws?wsdl");
        
        
        XPath xpath = XPathFactory.newInstance().newXPath();
        //String expression1 = "/definitions/message/attribute::*";
        String expression1 = "/schema/element/attribute::*"; 
              
        NodeList widgetNode1 = (NodeList) xpath.evaluate(expression1, document, XPathConstants.NODESET);
        System.out.println("-------------widgetNode1.getLength() : " + widgetNode1.getLength());
        if (widgetNode1.getLength() < 1) return;
        for(int i=0;i<widgetNode1.getLength();i++){
        Node node = widgetNode1.item( i);
        System.out.println("------------Node Name : " + node.getNodeName());
        System.out.println("------------Node Value : " + node.getTextContent());
       
        }
    
    }
}   

Ok, the output I get is

-------------widgetNode1.getLength() : 12
------------Node Name : name
------------Node Value : enableUserRequest
------------Node Name : name
------------Node Value : getUserResponse
------------Node Name : name
------------Node Value : getUserRequest
------------Node Name : name
------------Node Value : createUserResponse
------------Node Name : name
------------Node Value : listAllRequest
------------Node Name : name
------------Node Value : enableUserResponse
------------Node Name : name
------------Node Value : testUserResponse
------------Node Name : name
------------Node Value : HelloWorldRequest
------------Node Name : name
------------Node Value : createUserRequest
------------Node Name : name
------------Node Value : listAllResponse
------------Node Name : name
------------Node Value : HelloWorldResponse
------------Node Name : name
------------Node Value : testUserRequest    

This is well and good, but I also need to get the wsdl:part and the type (xsd:string) which tells me type of parameter.

Do I need to change my expression1 (String expression1 = "/schema/element/attribute::*"; ) statement?

How can I do that? Any suggestions.

Thanks again.
[ September 28, 2007: Message edited by: vjy chin ]

[Peer Reynders]

Given the expression that you are using I don't even know what you are parsing. That expression is finding

<schema>
<element name="enableUserRequest" />
</schema>

etc. somewhere.

In any case - simply use an expression that selects the message nodes and then use the org.w3c.dom.Node interface to navigate to the parts you want. getAttributes() will give you a org.w3c.dom.NamedNodeMap and getChildNodes() will get you another org.w3c.dom.NodeList.
[ September 28, 2007: Message edited by: Peer Reynders ]

[vjy chin]

Thanks for the reply. I tried to get the values, but not able to get the type part (I need to get xsd:string as result) in

<wsdl:message name="enableUserRequest">
 
      <wsdl:part name="id" type="xsd:string"/>
 
   </wsdl:message>
 
   <wsdl:message name="getUserResponse">
 
      <wsdl:part name="getUserReturn" type="xsd:string"/>
 
   </wsdl:message>    

The code I have now is

package com.waveset.adapter;
 
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
 
import javax.xml.namespace.NamespaceContext;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathFactory;
 
import org.w3c.dom.Document;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
 
 
 
 
public class Test {
    
    public static void main( String[] args ) throws Exception {
    
        DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
        Document document = builder.parse("http://schemas.xmlsoap.org/wsdl/");
        document = builder.parse("http://localhost:8080/axis/HelloWorldService.jws?wsdl");
        
        
        XPath xpath = XPathFactory.newInstance().newXPath();
        String expression1 = "/definitions/message";
             
        NodeList widgetNode1 = (NodeList) xpath.evaluate(expression1, document, XPathConstants.NODESET);
        
        System.out.println("--widgetNode1.getLength() : " + widgetNode1.getLength());
        if (widgetNode1.getLength() < 1) return;
        for(int i=0;i<widgetNode1.getLength();i++){
        Node node = widgetNode1.item(i);
        System.out.println("----Node Attributes: " + node.getAttributes());
        System.out.println("-----Node Child size: " + node.getChildNodes().getLength());
        NamedNodeMap attributes = node.getAttributes();
        Node n = attributes.getNamedItem("name");
        System.out.println("n.getTextContent(), Message name: " + n.getTextContent());
        
        NodeList aaa = node.getChildNodes();
        for(int a=0;a<aaa.getLength();a++){
        Node node111 = aaa.item(a);
        System.out.println("node111 Name : " + node111.getNodeName());
        System.out.println("node111 Value : " + node111.getTextContent());
Node node111 = aaa.item(a);
        NamedNodeMap znnm = node.getAttributes();
        Node nz = znnm.getNamedItem("part");
        System.out.println("nz.getTextContent(), Message name: " + nz.getTextContent());
        
        }
 
        
        System.out.println("-------*********-------------");
        }
    
    }
}    

I am not able to get the value. Am I missing something?

Thanks for your help.

P.S. I tried WSDL4j library and I was able to get the results. But the value I get is some ibm class (com.ibm.wsdl.ServiceImpl), so I am not sure if it would be good.
[ September 28, 2007: Message edited by: vjy chin ]

[Peer Reynders]

Your WSDL sample uses namespaces while your XPath expression does not ... ???

This (non-namespace) code sample works fine:

import java.io.StringReader;
import org.xml.sax.InputSource;
import org.w3c.dom.NodeList; 
import org.w3c.dom.Node; 
import org.w3c.dom.NamedNodeMap; 
 
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathFactory;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathExpression;
 
public class Test {
 
    private static final String DEFAULT_INDENT = "    ";
 
    private static String attributesToString(NamedNodeMap attributes) {
 
        StringBuilder   result = new StringBuilder();
        Node            attr;
 
        for(int index = 0; index < attributes.getLength(); ++index ) {
            attr = attributes.item( index );
            result.append( attr.getNodeName() );
            result.append( "( " );
            result.append( attr.getNodeValue() );
            result.append( " ) " );
        }
        return result.toString();
    }
 
    private static void showNode( Node node, String indent ) {
        System.out.println(indent + node.getNodeName() + ": " + attributesToString( node.getAttributes() ) );
        showNodeList( node.getChildNodes(), indent + DEFAULT_INDENT );
    }
 
    private static void showNodeList( NodeList list, String indent ) {
        Node node;
 
        for(int index = 0; index < list.getLength(); ++index ) {
            node = list.item( index );
            if (node.getNodeName().equals("#text")) continue;
 
            showNode( node, indent );
        }
    }
 
    private static void showNodeList( NodeList list ) {
        showNodeList(list, "" );
    }
 

    public static void main( String[] args ) throws Exception {
 
        String lineSeparator = System.getProperty( "line.separator" );
 
        String xmlSource = 
               "<definitions>"                                        + lineSeparator
             + "    <message name=\"getBookPrice\">"                  + lineSeparator
             + "        <part name=\"isbn\" type=\"string\" />"       + lineSeparator
             + "    </message>"                                       + lineSeparator
             + "    <message name=\"getBookPriceResponse\">"          + lineSeparator
             + "        <part name=\"price\" type=\"float\" />"       + lineSeparator
             + "        <part name=\"qtyOnHand\" type=\"integer\" />" + lineSeparator
             + "    </message>"                                       + lineSeparator
             + "</definitions>";
 
        XPathFactory factory    = XPathFactory.newInstance();
        XPath xPath             = factory.newXPath();
        InputSource inputSource = new InputSource( new StringReader(xmlSource) );
 
        String expression = "/definitions/message";
        XPathExpression xpathExpression = xPath.compile( expression );
 
        showNodeList( (NodeList) xpathExpression.evaluate( inputSource, XPathConstants.NODESET ) );
    }
}

Output:

message: name( getBookPrice )
    part: name( isbn ) type( string )
message: name( getBookPriceResponse )
    part: name( price ) type( float )
    part: name( qtyOnHand ) type( integer )

[vjy chin]

Thanks Peer,

It worked great and I changed slightly according to my requirement.

Thanks once again for your time and help.

[Elsan]

Hi,

You can use axis's Emitter class which is being used by axis's WSDL2Java behind the scene. This is same as WSDL2Java but you can use it programmatically.

[Bear Bibeault]

Elsan, please check your private messages for an important message.

[Peer Reynders]

Originally posted by Elsan:
You can use axis's Emitter class which is being used by axis's WSDL2Java behind the scene.

The point that I made earlier in the thread was that the WSDL is the service contract. The output from WSDL2Java is merely a translation of the original service contract according to certain mapping rules. That translation is used a convenience during development but should never be mistaken for the actual service contract.

[pavitra jayaraman]

hey i am an new bee to web services and i need to perform this task and can you please suggest some web sites where i can learn them in detail....thanks in advance