Returning String[] from WebService method

[fr...@nc.rr.com]

I'm having a problem returning a String array from a method of a webservice.  In order to provide a simple way to recreate the problem, I modified the 2.1 webservices sample ( http://cwiki.apache.org/GMOxDOC21/developing-a-simple-calculator-web-service.html ) such that the add() method returns a String[] instead of an int.  The mods were simple, I changed the "return" element of the addResponse in the wsdl of the sample
from:
	<xsd:element name="return" type="xsd:int"/>
to:
	<xsd:element name="return" type="xsd:string" minOccurs="0" maxOccurs="unbounded"/>
and the CalculatorService.java (and the corresponding interface it implements) from:
    public int add(int value1, int value2) {
...
      return value1 + value2;
to:
    public String[] add(int value1, int value2) {
...
      return new String[]{"Value 1", String.valueOf(value1), "Value 2", String.valueOf(value2), String.valueOf(value1 + value2)};

and then changed the result.jsp to expect a String[] and iterate over the contents printing out each element,  If I add 3 + 4, I expected the result.jsp to display:

Value 1
3
Value 2
4
7

but I get instead:
Value
1
3
Value
2
4
7

It seems that in the process of converting the response into a Java String[], the whitespace of the individual strings is acting as a delimiter.  Thus instead of getting an array of 5 strings, I get an array of 7 strings instead.  What have I misconfigured?

Fred

Re: Returning String[] from WebService method

[Jarek Gawor <jg...@gmail.com>]

Fred,

Ok, I can reproduce this problem with Axis2 but not with CXF. Axis2
just serializes (and deserializes) the data completely wrong. Looks
like a bug in Axis2. There are two options:

1) Switch to CXF, or

2) Use jaxws-tools wsimport to generate the right classes from the
wsdl and use the generated PortType class to implement your service
and client. That's the option I would recommend.

Jarek

On Fri, Mar 28, 2008 at 6:00 PM,  <fr...@nc.rr.com> wrote:
> I'm having a problem returning a String array from a method of a webservice.  In order to provide a simple way to recreate the problem, I modified the 2.1 webservices sample ( http://cwiki.apache.org/GMOxDOC21/developing-a-simple-calculator-web-service.html ) such that the add() method returns a String[] instead of an int.  The mods were simple, I changed the "return" element of the addResponse in the wsdl of the sample
>  from:
>         <xsd:element name="return" type="xsd:int"/>
>  to:
>         <xsd:element name="return" type="xsd:string" minOccurs="0" maxOccurs="unbounded"/>
>  and the CalculatorService.java (and the corresponding interface it implements) from:
>     public int add(int value1, int value2) {
>  ...
>       return value1 + value2;
>  to:
>     public String[] add(int value1, int value2) {
>  ...
>       return new String[]{"Value 1", String.valueOf(value1), "Value 2", String.valueOf(value2), String.valueOf(value1 + value2)};
>
>  and then changed the result.jsp to expect a String[] and iterate over the contents printing out each element,  If I add 3 + 4, I expected the result.jsp to display:
>
>  Value 1
>  3
>  Value 2
>  4
>  7
>
>  but I get instead:
>  Value
>  1
>  3
>  Value
>  2
>  4
>  7
>
>  It seems that in the process of converting the response into a Java String[], the whitespace of the individual strings is acting as a delimiter.  Thus instead of getting an array of 5 strings, I get an array of 7 strings instead.  What have I misconfigured?
>
>  Fred
>

Re: Returning String[] from WebService method

[Jarek Gawor <jg...@gmail.com>]

Just from a quick glance it looks like the result.jsp is not quite
right. It should look like the one shown here:
http://cwiki.apache.org/GMOxDOC21/simple-web-service-with-jax-ws.html
(titled add.jsp where jndi lookup is done). See if changing that
helps.

Jarek

On Fri, Mar 28, 2008 at 6:00 PM,  <fr...@nc.rr.com> wrote:
> I'm having a problem returning a String array from a method of a webservice.  In order to provide a simple way to recreate the problem, I modified the 2.1 webservices sample ( http://cwiki.apache.org/GMOxDOC21/developing-a-simple-calculator-web-service.html ) such that the add() method returns a String[] instead of an int.  The mods were simple, I changed the "return" element of the addResponse in the wsdl of the sample
>  from:
>         <xsd:element name="return" type="xsd:int"/>
>  to:
>         <xsd:element name="return" type="xsd:string" minOccurs="0" maxOccurs="unbounded"/>
>  and the CalculatorService.java (and the corresponding interface it implements) from:
>     public int add(int value1, int value2) {
>  ...
>       return value1 + value2;
>  to:
>     public String[] add(int value1, int value2) {
>  ...
>       return new String[]{"Value 1", String.valueOf(value1), "Value 2", String.valueOf(value2), String.valueOf(value1 + value2)};
>
>  and then changed the result.jsp to expect a String[] and iterate over the contents printing out each element,  If I add 3 + 4, I expected the result.jsp to display:
>
>  Value 1
>  3
>  Value 2
>  4
>  7
>
>  but I get instead:
>  Value
>  1
>  3
>  Value
>  2
>  4
>  7
>
>  It seems that in the process of converting the response into a Java String[], the whitespace of the individual strings is acting as a delimiter.  Thus instead of getting an array of 5 strings, I get an array of 7 strings instead.  What have I misconfigured?
>
>  Fred
>