Re: How to generate the output for a given java collection object

I tried the below one. but i am getting error:-
 <#list itemMap?keys as key>${key}<#list itemMap[key] as item>${item}</#list></#list>
 
error:-Java backtrace for programmers:
----------freemarker.template.TemplateException
at freemarker.core.TemplateObject.invalidTypeException(
at freemarker.core.DynamicKeyName.dealWithNumericalKey(
at freemarker.core.DynamicKeyName._getAsTemplateModel(
at freemarker.core.Expression.getAsTemplateModel(
at freemarker.core.IteratorBlock.accept(
at freemarker.core.Environment.visit(
at freemarker.core.MixedContent.accept(
at freemarker.core.Environment.visit(
at freemarker.core.IteratorBlock$Context.runLoop(
at freemarker.core.Environment.visit(
at freemarker.core.IteratorBlock.accept(
at freemarker.core.Environment.visit(
at freemarker.core.Environment.process(
at freemarker.template.Template.process(
at org.raj.ComplexMap.main(: Expected number, sequence, or string. itemMap evaluated instead to freemarker.template.SimpleHash on line 2, column 14 in complexMap.ftl.TemplateObject.java:135)DynamicKeyName.java:125)DynamicKeyName.java:90)Expression.java:89)IteratorBlock.java:94)Environment.java:210)MixedContent.java:92)Environment.java:210)IteratorBlock.java:167)Environment.java:417)IteratorBlock.java:102)Environment.java:210)Environment.java:190)Template.java:237)ComplexMap.java:56)

From: Daniel Henrique Alves Lima <[email protected]>
To: Rajvinder Pal <[email protected]>; FreeMarker-user <[email protected]>
Sent: Friday, September 23, 2011 7:28 AM
Subject: Re: [FreeMarker-user] How to generate the output for a given java collection object


    I would try something like

    [#list (itemMap?keys) as key]
       ${key} [#list (itemMap[key]) as item]${item}[/#list]
    [/#list]

   But I'm not sure if FM supports integers as hash keys.

Rajvinder Pal wrote: 
Hi ,
> 
>Following is my java object 'itemMap'.And i want to generate the output as given below
> 
>Map<Integer, Set<String>> itemMap = newHashMap<Integer, Set<String>>();
>//id 1
>Integer i1 = newInteger(1);
>Set<String> itemSet1 = newHashSet<String>();
>itemSet1.add("A");
>itemMap.put(i1, itemSet1);
>//id 2
>Integer i2 = newInteger(2);
>Set<String> itemSet2 = newHashSet<String>();
>itemSet2.add("B");
>itemSet2.add("C");
>itemMap.put(i2, itemSet2);
>//id 3
>Integer i3 = newInteger(3);
>Set<String> itemSet3 = newHashSet<String>();
>itemSet3.add("D");
>itemSet3.add("E");
>itemMap.put(i3, itemSet3);
>System.out.println(itemMap);
>
>Expected output:
>
>1 A
>2 B C
>3 D E
>
>Could anyone let me know how can i generate this using freemarker template?
>
>Thanks,
>Rajvinder
>

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