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template.ftl

<#-- JSON stringify -->
<#function stringify obj>
    <#if !obj??>
        <#return 'undefined'>
    </#if>
    <#if obj?is_date>
        <#return '"' + obj?string("yyyy-MM-dd HH:mm:ss") + '"'>
    </#if>
    <#if obj?is_boolean || obj?is_number>
        <#return obj?string>
    </#if>
    <#if obj?is_enumerable>
        <#local str = '['>
        <#list obj as x>
            <#local str = str + stringify(x)>
            <#if x_has_next>
                <#local str = str + ',<br>'>
            </#if>
        </#list>
        <#return str + ']'>
    </#if>
    <#if obj?is_string>
        <#return '"' + obj?js_string + '"'>
    </#if>
    <#if obj?is_hash || obj?is_hash_ex>
        <#local str = '{'>
        <#local arr = [] >
        <#local keys = obj?keys>
        <#list keys as x>
            <#if x!='class' && obj[x]??>
                <#local arr = arr + [x]>
            </#if>
        </#list>
        <#list arr as x>
            <#local str = str + '"' + x + '" :' + stringify(obj[x])>
            <#if x_has_next>
                <#local str = str + ',<br>'>
            </#if>
        </#list>
        <#return str + '}'>
    </#if>
    <#return ''>
    <#if obj?is_string>
        <#return '"' + obj?js_string + '"'>
    </#if>
</#function>


${stringify(.data_model)}