Re: Can't get hashes to work

Yeah. I did go back through those emails and figured out what I was  
doing wrong. This really is just the one the very few parts of FM that  
kills me and it is mainly because it is not obvious or intuitive. I  
still feel that making the [] operator take any Object would help.

-bp




On Jun 17, 2009, at 3:55 PM, Daniel Dekany wrote:

> Wednesday, June 17, 2009, 9:31:37 PM, Brian Pontarelli wrote:
>
>> I went back through our previous thread and found that using the
>> ${bean.coolMap(key)} syntax works. This is systemic based on how FM  
>> handles the [] notation right?
>
> The original problem is that, as I said, someHash[key] expects a
> *string* as key. Because, the hash type of FTL, by definition, maps
> *string* keys to arbitrary values. It's not the same as Java's Map.
> (Note that to further complicate the matter, in FTL
> someSequenceOrString[index] expects an integer index. So, the [] thing
> is used for that too.) Now someBeanWrappedMap(key) has technically
> nothing to do with all the []-s, it's just a method call, so it
> accepts all kind of keys. If you have a Map with non-string keys, you
> must use that.
>
>> -bp
>>
>>
>>
>> On Wed, Jun 17, 2009 at 1:19 PM, Brian Pontarelli <[email protected] 
>> > wrote:
>> So, I have been working on converting everything over to use
>> BeansWrapper, but now I can't seem to get my hashes to work at all,
>> even with DefaultObjectWrapper. I'm assuming this is something
>> simple, but I can't figure it out. Here is my simple bean:
>>
>> public class Bean {
>>   public Map<Integer, String> coolMap = new HashMap<Integer,  
>> String>();
>>   private int age;
>>
>>   public int getAge() {
>>       return age;
>>   }
>>
>>   public void setAge(int age) {
>>       this.age = age;
>>   }
>> }
>>
>>
>> Here's the code that I'm using to execute the template:
>>
>>       BeansWrapper ow = new BeansWrapper();
>>       ow.setExposeFields(true);
>>       ow.setSimpleMapWrapper(true);
>>
>>       Bean bean = new Bean();
>>       bean.coolMap.put(1, "test");
>>       bean.setAge(42);
>>
>>       Map<String, Object> context = new HashMap<String, Object>();
>>       context.put("bean", bean);
>>
>>       Template template =
>> freeMarkerConfiguration.getTemplate(templateName, locale);
>>       template.setObjectWrapper(ow);
>>       template.process(root, writer);
>>
>>
>> The template is pretty simple:
>>
>>   [#ftl/]
>>   Bean [#list bean.coolMap?keys as key]${key} ${bean.coolMap[key]}  
>> [/#list] ${bean.age}
>>
>>
>> The error I'm getting is just the standard "Expected number,
>> sequence, or string. bean.coolMap evaluated instead to
>> freemarker.ext.beans.SimpleMapModel". It is failing at the
>> ${bean.coolMap[key]} statement. However, that should work fine,  
>> right?
>>
>> -bp
>>
>>
>>
>>
>
> -- 
> Best regards,
> Daniel Dekany
>


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