Mark,
To determine if the object is an array, you can simply use:
nextObj = output.getObjectPart(potentialArrayObject);
boolean array = nextObject.getClass().isArray();
Note: you may want to check if the object is null before doing getClass()
Regards,
Owen
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| | <[EMAIL PROTECTED]|
| | cd.ie> |
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| | 25/06/2003 12:09 |
| | Please respond to|
| | wsif-user |
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| To: <[EMAIL PROTECTED]>
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| cc:
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| Subject: RE: Array return types
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Hi folks,
Think it's all sorted now. It's not so elegant as I usually
don't like testing things by having to catch an exception but basically by
just treating the result as a potential array and attempting to get it's
length using the reflection API you can catch an IllegalArgumentException
if the object returned isn't an array. In that case you just treat it like
any other object.
nextObj = output.getObjectPart(potentialArrayObject);
int length = 0;
boolean array = true;
try{
length = Array.getLength(nextObj);
}
catch(IllegalArgumentException iae){
System.out.println("The output is not an array");
array=false;
}
if(!array)
{
//It's just an object
// not an array
System.out.println("It's not an array");
System.out.println(nextObj);
}
else
{
// It's an array
System.out.println("It's an array");
Object nextArrObj=null;
for(int i =0;i<length;i++)
{
nextArrObj = Array.get(nextObj,i);
System.out.println(nextArrObj.getClass());
System.out.println(nextArrObj);
}
}
Hope someone gets some use out of this. If there's a more graceful way of
determining if an objects an array without catching the exception I'd love
if someone could post it.
Thanks,
Mark.
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: 24 June 2003 18:04
To: [EMAIL PROTECTED]
Subject: Re: Array return types
Folks,
I've done a little tinkering around and it turns out that
what actually gets returned is an array of the primitive type.
So I've got an EJB bean that's exposed as a web service and it's
returning a Double array yet when the call returns, the
output's ObjectPart corresponding to the right name only casts to the
primitive type, (double [ ]).
I get a class cast exception thrown if I attempt to cast to the
wrapper object (Double []).
This could unfortunately mean a series of instanceof if statements
that could potentially be a bit of a nightmare.
There's a reflective Array class java.lang.reflect.Array that exists
for arrays of objects unfortunately
there doesn't seem to be anything available for simple primitive
arrays.
Has anyone any ideas on how to get around this reflectively?
Thanks in advance,
Mark.
