ArrayList, which is a Set-type collection, does not have a getValue method. I
assume you meant some Map-type collection like HashMap, HashTable, Attributes
or TreeMap, where the "get" method returns an object for a given key.
Bob Kirby
At 04:53 PM 9/26/2007, Ernest Friedman-Hill wrote:
>No cast is necessary.
>
>On Sep 26, 2007, at 5:34 PM, amen wrote:
>>Ernest,
>>
>>Yes, I mean java collection class -- "ArrayList" in which it contains
>>multitple objects who have a getter for each of its property.
>>
>>I insert the ArrayList into working memory and try to write a rule
>>based on
>>the property's value of each object in the arraylist.
>>
>>is this the right way to access it?
>>
>>(( ?myArraylist get 0) getValue "value1")
>>
>>Before calling object.getValue("value1"), how do I cast the return
>>value of
>>arraylist.get(0) to the object type it contains in Jess?
>>
>>Thanks a lot!
>>Andrew
>>
>>
>>Ernest Friedman-Hill wrote:
>>>
>>>You deal with Java objects from Jess the same way you deal with them
>>>from Java. There is no special syntax for dealing with collections --
>>>you just call the Java methods. To call a method "y" on a Java object
>>>in variable ?x with argument "z", you write
>>>
>>>(?x y "z")
>>>
>>>Here you want to call "get" on the ArrayList to get an element, and
>>>"getValue" on the result; it looks like
>>>
>>>(bind ?theObject (?arraylist get 1))
>>>(?theObject getValue "value1")
>>>
>>>of course you can eliminate the extra variable ?theObject and write
>>>
>>>((?arraylist get 1) getValue "value1")
>>>
>>>Now, I'm a tiny bit concerned that you didn't actually mean
>>>"ArrayList" but rather "array" in your original post; which is it?
>>>
>>>
>>>On Sep 26, 2007, at 3:15 PM, Andrew Meng wrote:
>>>
>>>>Hello,
>>>>
>>>>I have a java arraylist collection declared in Jess. In a rule's
>>>>defination, I want to get some value from a object contained in
>>>>arraylist. like,
>>>>(> arraylist[1].getValue("value1") arraylist[0].getValue
>>>>("value2") )
>>>>
>>>>Can anyone tell me what is the right way to do it in Jess?
>>>>
>>>>Thanks a lot in advance!
>>>>Andrew
>>>>
>>>>Discover the new Windows Vista Learn more!
>>>
>>>---------------------------------------------------------
>>>Ernest Friedman-Hill
>>>Advanced Software Research Phone: (925) 294-2154
>>>Sandia National Labs FAX: (925) 294-2234
>>>PO Box 969, MS 9012 [EMAIL PROTECTED]
>>>Livermore, CA 94550 http://www.jessrules.com
>>>
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>>
>>--
>>View this message in context:
>>http://www.nabble.com/JESS%3A-How-to-access-info-in-a-objects-cotained-in-a-arraylist.-tf4524484.html#a12910353
>>Sent from the Jess mailing list archive at Nabble.com.
>>
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>
>---------------------------------------------------------
>Ernest Friedman-Hill
>Advanced Software Research Phone: (925) 294-2154
>Sandia National Labs FAX: (925) 294-2234
>PO Box 969, MS 9012 [EMAIL PROTECTED]
>Livermore, CA 94550 http://www.jessrules.com
>
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