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Chunzhi Hong (Chunzhi_Hong)
PEGA
Consulting Manager, Pega Consulting
Pegasystems Inc.
JP
Chunzhi_Hong Member since 2013 138 posts
PEGA
Posted: February 1, 2016
Last activity: October 4, 2018
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7.1.9 How to remove page group or page list element within a single loop

I got "java.lang.UnsupportedOperationException: use ClipboardPage.remove(Object) " run-time exception, if I was trying to remove element of a page group property, (i.e. Work-.pyWorkParty) within a single loop using Engine API.

Is this a known issue or am I missing something here? Below is my java step.

//get iterator for pyWorkParty page group

java.util.Iterator pyWorkPartyIterator = tools.getPrimaryPage().getProperty("pyWorkParty").iterator();

// loop the pyWorkParty

while(pyWorkPartyIterator.hasNext()){

   // get workParty

  ClipboardPage currentWorkParty = ((ClipboardProperty)pyWorkPartyIterator.next()).getPageValue();

   // if the workParty is Assignee, remove it.

  if("Assignee".equalsIgnoreCase(currentWorkParty.getString("pxPartyRole"))){

    pyWorkPartyIterator.remove(); // this step throws run-time exception

  }

}

Below is the Engine API Java doc.

com.pega.pegarules.pub.clipboard

Interface ClipboardProperty

iterator

java.util.Iterator iterator()

Returns an iterator allowing access to values contained in this list, page, or group property. Note that this iterator reflects the contents of this property at the time of its creation. Further changes to this property will not be reflected in this iterator.

Returns:
the iterator. For most properties, the objects returned by Iterator.next() are ClipboardProperty instances. Lightweight page lists are the exception; in this case the objects are String arrays (String[]).
Throws:
WrongModeException - this property does not contain a list, page, or group

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