Pu Zhongqiang created FREEMARKER-67:
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             Summary: Doesn't support org.bson.Document's correct order of keys.
                 Key: FREEMARKER-67
                 URL: https://issues.apache.org/jira/browse/FREEMARKER-67
             Project: Apache Freemarker
          Issue Type: Bug
          Components: engine
    Affects Versions: 2.3.26-incubating, 2.3.25-incubating, 2.3.24-incubating, 
2.3.23
         Environment: Windows7, jdk1.8.0_131, Tomcat 8.0.45, SpringMVC 
4.3.10.RELEASE
            Reporter: Pu Zhongqiang
            Priority: Minor


In mongdb's Java Driver 3.x, org.bson.Document is a representation of a bson 
document as a Map. Although org.bson.Document is not a subclass of 
LinkedHashMap, it really DOES maintain a meaningful order for its keys.

It works good if I use LinkedHashMap to load data.

{code:java}
LinkedHashMap<String,Object> accepted_sorts = new LinkedHashMap<>();
accepted_sorts.put("-favorite_time", "Hello");
accepted_sorts.put("-publish_time", "Welcome");
model.put("accepted_sorts", accepted_sorts);
{code}

{code:html}
<#list accepted_sorts?keys as value>
        ${value?string}
</#list>
<br>
<#list accepted_sorts as key,value>
        ${key?string},${value?string}
</#list>
{code}
it rendered as: 

{code:html}
-favorite_time -publish_time 
-favorite_time,Hello -publish_time,Welcome 
{code}


But It doesn't support  org.bson.Document's correct key order. You can see my 
test below:

{code:java}
Document accepted_sorts = new Document();
accepted_sorts.put("-favorite_time", "Hello");
accepted_sorts.put("-publish_time", "Welcome");
model.put("accepted_sorts", accepted_sorts);
{code}

{code:html}
<#list accepted_sorts?keys as value>
        ${value?string}
</#list>
<br>
<#list accepted_sorts as key,value>
        ${key?string},${value?string}
</#list>
{code}
it rendered as wrong order: 

{code:html}
-publish_time -favorite_time 
-publish_time,Welcome -favorite_time,Hello 
{code}

So, in the end, I wish freemarker can add support for org.bson.Document's 
correct order of keys.



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