A content item descriptor must define a content-property property and optionally can define a lastModified or length property. The content-property attribute specifies the name of an item descriptor property that is used to store or reference the content data itself. The content property is usually a java.io.File, String or a byte[] data type.
These properties can be implemented as user-defined properties so they can be computed at run time. This approach enables them to be taken from the file system, not stored in the database. For example:
<item-descriptor name="files" content-length-property="length" last-modified-property="lastModified" content-property="data"> <table name="media_files" type="auxiliary" id-column-names="media_id"> <property name="length" data-type="long" column-names="length"/> <property name="lastModified" data-type="timestamp" column-names="last_modified"/> <property name="data" data-type="binary" column-names="data"/> </table> </item-descriptor>
You configure your content item descriptors by naming the properties to use to retrieve each of these values. This is done with the following attributes in the <item-descriptor> tag:
Attribute Name | Description |
|---|---|
| Specifies the ID of the folder containing this folder or content item. |
| Refers to the name of this folder or content item (not the full path name) |
| For content item descriptors, this is the name of the property that holds the content itself. |
| For content item descriptors, this optionally is used to specify a property that can be used to retrieve the last modified time for that piece of content. |
