[AXIS-1537] getPreviousSibling results in NullPointerException on Envelopes

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Cannot Reproduce
• Affects Version/s: beta-3
• Component/s: SAAJ
• Environment: Windows 2000, JDK 1.3
• Assignee: Venkat Reddy
• Reporter: Michael Theroux
• Created: 31/Aug/04 20:03
• Updated: 15/Oct/07 18:44
• Resolved: 05/May/05 00:40

Description

I am attempting to run an XSLT directly against a result SOAPEnvelope and have hit a couple of issues.

One issue is that SOAPEnvelope.getPreviousSibling() will result in a NullPointerException. Below is a code snippet:

/*

• Copyright 2001-2004 The Apache Software Foundation.
  *
• Licensed under the Apache License, Version 2.0 (the "License");
• you may not use this file except in compliance with the License.
• You may obtain a copy of the License at
  *
• http://www.apache.org/licenses/LICENSE-2.0
  *
• Unless required by applicable law or agreed to in writing, software
• distributed under the License is distributed on an "AS IS" BASIS,
• WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
• See the License for the specific language governing permissions and
• limitations under the License.
  */
  import org.apache.axis.client.Call;
  import org.apache.axis.client.Service;

import javax.xml.namespace.QName;

public class Test
{
public static void main(String [] args) {
try {
String endpoint =
"http://webservices.sonicsw.com:8080/axis/CreditCheck.jws";

Service service = new Service();
Call call = (Call) service.createCall();

call.setTargetEndpointAddress( new java.net.URL(endpoint) );
call.setOperationName(new QName("http://webservices.sonicsw.com:8080/axis/CreditCheck.jws", "checkCredit") );

// Call to addParameter/setReturnType as described in user-guide.html
call.addParameter("custid",
org.apache.axis.Constants.XSD_STRING,
javax.xml.rpc.ParameterMode.IN);
call.addParameter("amount",
org.apache.axis.Constants.XSD_FLOAT,
javax.xml.rpc.ParameterMode.IN);
call.setReturnType(org.apache.axis.Constants.XSD_BOOLEAN);

Boolean ret = (Boolean) call.invoke( new Object[]

{ "1234", new Float( 1.24 ) }

);
org.w3c.dom.Node n = call.getResponseMessage().getSOAPEnvelope();
n.getPreviousSibling();
/* Node parentNode = n.getParentNode();
if( parentNode == null )
System.err.println( "PARENT NODE IS NULL!" );*/

// String test = com.sonicsw.xqimpl.script.Util.getElementAsString( (org.w3c.dom.Element)n, true );
String test = org.apache.axis.utils.DOM2Writer.nodeToString( n, true );
System.out.println("Resulting XML: " + test );

} catch (Exception e)

{ e.printStackTrace(); System.err.println(e.toString()); }

}
}

n.getPreviousSibling() throws a NullPointerException.

A workaround is to call getAsDOM() on the Envelope.

However, performance may make this undesireable. getAsDOM() will cause Axis's object model to be serialized as a string, then a subsequent deserialization will occur to create a native DOM because of performanceit results in a serialization of Axis's DOM structure to a string, then another deserialization occurs to create a DOM in your parser (such as Xerces).

Issue Links

• duplicates: AXIS-1427 sibling method do not work