Hello All,
We've use Axis 1.1 for a long time and have just switched it to
streaming....
And encountered a problem:
1. We have wsdl that describes a service with 4 params. And one
of them can be nil ("<part name="start" type="xs:dateTime"
xs:nillable="true">").
2. Don't forget that we also have "streaming=on"...
3. According to the Axis sources
code(org/apache/axis/deployment/wsdd/WSDDService.java):
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468: service.setHighFidelityRecording(!streaming);
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4. Again according to the source code in all constructors of
DeserializationContextImpl (the only implementation of
org/apache/axis/encoding/DeserializationContextImpl.java):
........................................................................
.................
160, 184, 222: if (ctx == null || ctx.isHighFidelity())
161, 185, 223: recorder = new SAX2EventRecorder();
........................................................................
.................
So, it looks like if when you use "streaming" you don't have get
a default "recorder". (it's used also in
org/apache/axis/message/MessageElement.class).
5. According to the code of
org/apache/axis/message/RPCHandler.java:
........................................................................
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265: // If the nil attribute is set, just
266: // return the base DeserializerImpl.
267: // Register the value target to set the value
268: // on the RPCParam. This is necessary for cases like
269: // <method>
270: // <foo>123</foo>
271: // <foo>456</foo>
272: // <foo xsi:nil="true" />
273: // </method>
274: // so that a list of 3 items is created.
275: // Failure to register the target would result in the
last
276: // item not being added to the list
277: if (context.isNil(attributes)) {
278: Deserializer nilDSer = new DeserializerImpl();
279: nilDSer.registerValueTarget(
280: new MethodTarget(currentParam,
281: RPCParam.getValueSetMethod()));
282: return (SOAPHandler) nilDSer;
283: }
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So, if client of our service passing "nil" param an instance of
org.apache.axis.encoding.DeserializerImpl (default implementation) will
be created.
6. Also org/apache/axis/encoding/DeserializerImpl.java has the
following
........................................................................
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562: public void onEndElement(String namespace, String
localName,
563: DeserializationContext context)
564: throws SAXException
565: {
566: // If we only have SAX events, but someone really
wanted a
567: // value, try sending them the contents of this
element
568: // as a String...
569: // ??? Is this the right thing to do here?
570:
571: if (this.getClass().equals(DeserializerImpl.class) &&
572: targets != null &&
573: !targets.isEmpty()) {
574-582: etc.
583: context.getCurElement().publishContents(so);
584-586: etc.
587: }
568: }
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"getCurElement()" method returns instance of
org.apache.axis.message.MessageElement instance witch has the following
code
org/apache/axis/message/MessageElement.java:
........................................................................
.................
725: public void publishContents(ContentHandler handler)
throws SAXException
726: {
727: if (recorder == null)
728: throw new
SAXException(Messages.getMessage("noRecorder00"));
729:
730: recorder.replay(startContentsIndex, endEventIndex-1,
handler);
731: }
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7. According to all previous (and this is actually happening in
our case):
- "streaming=on"
- "context.isNil(attributes)" is true
- "recorder" is null
- "throw new
SAXException(Messages.getMessage("noRecorder00"))" executed (why???).
I have two ideas about how this issue could be fixed:
1. Remove (5) (lines 265 to 283 in file
org/apache/axis/message/RPCHandler.java) code
But, this will introduce (if it wasn't before)
additional responsibility to handler this "nil" case on particular
Deserializer
implementation (like: all its current children in
"org.apache.axis.encoding.ser" package)...
Can we do this (looks like all child implementations support this
behavior now)?
2. Add "isNil" case into "if" statement in
org/apache/axis/encoding/DeserializerImpl.java (see 6 for difference):
................................................................
571: if
(this.getClass().equals(DeserializerImpl.class) &&
572: targets != null &&
573: !targets.isEmpty()
(new line) 574: && !isNil) { // nothing to output if
"nil"
575-582: etc.
................................................................
Is it correct "default" behavior of this class?
Thank you,
Renat Yanbekov
Software Engineer
The StorePerform Technologies Inc.
