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| Traverse Environment Tree using Java Compute Node |
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Message
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| gaurav.udgir |
 Posted: Thu May 21, 2009 6:23 am Post subject: Traverse Environment Tree using Java Compute Node |
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Apprentice
Joined: 18 May 2009
Posts: 32
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Hi All,
I would like to traverse a Environment Tree using a Java Compute Node and need to access the values in the code. I will be getting a structure like
Field1
subfield1
subfield2
...
subfieldn
Field2
subfield1
subfield2
...
subfieldn
I will not get how many number of sub-fields will be present in each field type record. I need to calculate these number of subfields under each Field. If some one is having some sample code or any hints, please help.
Regards,
Gaurav |
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| Vitor |
| Posted: Thu May 21, 2009 6:28 am Post subject: Re: Traverse Environment Tree using Java Compute Node |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| gaurav.udgir wrote: |
| any hints, please help. |
Look at this the same way you would if it was a message structure.
It's straightforward to move through an unknown number of children in a tree (well it is in ESQL, Java who knows? Not me!  ). Just go round the siblings until you run out.
Someone who knows Java may be able to offer actual code.
_________________
Honesty is the best policy.
Insanity is the best defence. |
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| WMBDEV1 |
| Posted: Thu May 21, 2009 7:01 am Post subject: |
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Sentinel
Joined: 05 Mar 2009
Posts: 888
Location: UK
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As Vitor says, you can use getFirstChild() and getNextSibling() to navigate the tree.
Examples of these methods are shown below:
| Code: |
MbMessage message = assembly.getGlobalEnvironment();
MbElement element = message.getRootElement();
MeElement child = element.getFirstChild();
MbElement sibling = element.getNextSibling();
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It should be easy for you to then navigate the tree by putting these lines into a recursive method and adding some base case checks in there.
I've done this in ESQL before... have you considering doing it in ESQL? I think it will perform better for you (if you are just doing trivial tree navigation). |
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