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https://issues.apache.org/jira/browse/JEXL-139?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Henri Biestro resolved JEXL-139.
--------------------------------
Resolution: Incomplete
The submitted code is not an enhancement request; it is first and foremost
lacking a goal/use-case.
If you want to resubmit/reopen it, please describe in words what this is
supposed to achieve and how this would benefit other users.
As is, this is only an example of using Jexl in a specific way (that probably
could benefit from Jxlt expressions / templates).
> Loop over an iterable, evalaute and expression per row, and return
> concatenated results
> ---------------------------------------------------------------------------------------
>
> Key: JEXL-139
> URL: https://issues.apache.org/jira/browse/JEXL-139
> Project: Commons JEXL
> Issue Type: New Feature
> Reporter: Manoj Mokashi
> Priority: Minor
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> Code below.
> /**
> * Iterates over the iterable represented by iterExpression
> * For each row, evaluate the row-expression
> * Return a string of all row-results, concatenated by separator.
> * The current current row is indicated by $$__EVAL_ROW and the current
> index by $$__EVAL_ROWNUM
> * @param enumExpression
> * @param expression
> * @return
> */
> public String evalExprOverIter( String iterExpression, String
> rowExpression, String separator){
> Object objIter = evalExpr( iterExpression);
> if( objIter == null ){ return "";}
> Iterable iterabl = null;
> if( objIter.getClass().isArray()){
> iterabl = Arrays.asList( (Object[]) objIter );
> }
> else if( objIter instanceof Map){
> iterabl = ((Map) objIter).entrySet();
> }
> else {
> iterabl = (Iterable) objIter;
> }
> Iterator iter = iterabl.iterator();
> StringBuilder sbld = new StringBuilder();
> int rownum = 0;
> while( iter.hasNext()){
> Object row = iter.next();
> setVar( "$$__EVAL_ROW", row );
> setVar( "$$__EVAL_ROWNUM", rownum );
> sbld.append( evalExpr( rowExpression) );
> sbld.append( separator );
> rownum++;
> }
> // remove the temp variables we used.
> remVar( "$$__EVAL_ROWNUM" );
> remVar( "$$__EVAL_ROW" );
> return sbld.deleteCharAt( sbld.length()-1).toString();
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