SMILA/Documentation/2011.Simplification/org.eclipse.smila.processing.pipelets

org.eclipse.smila.processing.pipelets.MimeTypeIdentifyPipelet

Description

This pipelet is used to identify the mimetype of a document. It uses a org.eclipse.smila.processing.pipelets.mimetype.MimeTypeIdentifier service to perform the actual identification of the mimetype. Depending on what properties are specified the mime type is detected from the content or the file extension or both. If the identification does not return a mime type then, if configured, the service searches the metadata for a mimetype. The identified MimeType is store in an attribute in the record.

Configuration

The pipelet is configured using the PipeletConfiguration section inside the invokePipelet activity in the BPEL file:

Property	Type	Usage	Description
FileExtensionAttribute	String	optional	name of the attribute containing the file extension
ContentAttachment	String	optional	name of the attachment containing the file content
MetaDataAttribute	String	optional	name of the attribute containing metadata information. e.g. a WebCrawler returns a response header containing mime type information
MimeTypeAttribute	String	required	name of the attribute to store the identified MimeType in

Note that at least one of the properties FileExtensionAttribute, ContentAttachment and MetaDataAttribute needs to be specified!

Example

The following example is used in the SMILA example application to identify MimeTypes of documents delivered by Filesystem- and WebCrawler.

addpipeline.bpel

<extensionActivity>
    <proc:invokePipelet name="detect MimeType">
        <proc:pipelet class="org.eclipse.smila.processing.pipelets.MimeTypeIdentifyPipelet" />
        <proc:variables input="request" output="request" />
        <proc:PipeletConfiguration>
          <proc:Property name="FileExtensionAttribute">
            <proc:Value>Extension</proc:Value>
          </proc:Property>  
          <proc:Property name="MetaDataAttribute">
            <proc:Value>MetaData</proc:Value>
          </proc:Property>
          <proc:Property name="MimeTypeAttribute">
            <proc:Value>MimeType</proc:Value>
          </proc:Property>    
        </proc:PipeletConfiguration>
    </proc:invokePipelet>
</extensionActivity>