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https://issues.apache.org/jira/browse/FREEMARKER-195?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17424165#comment-17424165
]
Siegfried Goeschl commented on FREEMARKER-195:
----------------------------------------------
This is currently working
{code:java}
<#ftl output_format="plainText" strip_whitespace=true>
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Support FreeMarker Directives
==============================================================================
dataSources?has_content: ${dataSources?has_content?c}
dataSources?size: ${dataSources?size}
Use FTL Array-style Access
==============================================================================
<#if dataSources?has_content>
dataSources[0]: ${dataSources[0].name}
<#else>
No data sources provided ...
</#if>
Iterate Over DataSources as List
==============================================================================
<#list dataSources as dataSource>
- dataSource[${dataSource?index}] => ${dataSource.name}<#lt>
</#list>
Iterate Over DataSources as Map
==============================================================================
<#list dataSources as name, dataSource>
- dataSource["${name}"] => ${dataSource.name}<#lt>
</#list>
Iterate Over DataSources as Values
==============================================================================
<#list dataSources?values as dataSource>
- dataSource[${dataSource?index}] => ${dataSource.name}<#lt>
</#list>
Get Document Names As Keys
==============================================================================
<#list dataSources?keys as name>
- ${name}<#lt>
</#list>
Access Underlying DataSources API
==============================================================================
DataSources.getNames(): ${dataSources?api.names?size}
DataSources.getGroups(): ${dataSources?api.getGroups()?size}
DataSources.find(): ${dataSources?api.find("*")?size}
Iterate Over DataSources Using Wildcard Search
==============================================================================
<#if dataSources?has_content>
<#list dataSources?api.find("*") as dataSource>
- ${dataSource.name}
</#list>
<#else>
No data sources provided ...
</#if>
<#if dataSources?has_content>
<#list dataSources as dataSource>
[#${dataSource?counter}] - ${dataSource.name}
==============================================================================
Invoke Arbitrary Methods On DataSource
---------------------------------------------------------------------------
<#assign dataSource=dataSources?first>
Name : ${dataSource.name}
Nr of lines : ${dataSource.lines?size}
Content Type : ${dataSource.contentType}
Charset : ${dataSource.charset}
Extension : ${dataSource.extension}
Nr of chars : ${dataSource.text?length}
Nr of bytes : ${dataSource.bytes?size}
Iterating Over Metadata Of A Datasource
---------------------------------------------------------------------------
<#list dataSource.metadata as name, value>
${name?right_pad(19)} : ${value}
</#list>
</#list>
</#if>
{code}
> [freemarker-generator] Improve exposure of DataSources using
> TemplateHashModelEx2
> ---------------------------------------------------------------------------------
>
> Key: FREEMARKER-195
> URL: https://issues.apache.org/jira/browse/FREEMARKER-195
> Project: Apache Freemarker
> Issue Type: Improvement
> Reporter: Siegfried Goeschl
> Assignee: Siegfried Goeschl
> Priority: Major
>
> Have another take on it since I failed at the first iteration
> {noformat}
> It is doable, like the XML DOM wrapped does that. you just need to
> implement both TemplateHashModel (TemplateHashModelEx2 preferably) and
> TemplateSequenceModel. I guess the problem was that you also wanted to
> expose the methods. That's not possible since in FTL (and unlike in
> Java, but like in many other languages) there's no separate namespace
> for method names. So, either you move those to somewhere, like under
> tools.dataSourceOperations, or you stupport the ?api built-in, so once
> can do dataSources?api.find(...).
> {noformat}
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