Content Comparison

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1. Create a new Java class that implements ddf.catalog.transform.QueryResponseTransformer.

   Code Block
   public class SampleResponseTransformer implements ddf.catalog.transform.QueryResponseTransformer

2. Implement the transform method.

   Code Block
   public BinaryContent transform(SourceResponse upstreamResponse, Map<String, Serializable> arguments) throws CatalogTransformerException

3. Import the 

   Insert excerpt
   ApplicationName ApplicationName nopanel trueApplicationName

   interface packages to the bundle manifest (in addition to any other required packages).

   Code Block
   xml xml
   Import-Package: ddf.catalog, ddf.catalog.transform

4. Create an OSGi descriptor file to communicate with the OSGi Service Registry (described in the Working with OSGi section). Export the service to the OSGi registry and declare service properties.

   Code Block
   xml xml title Blueprint descriptor examplexml
   ... <service ref="[[SampleResponseTransformer]]" interface="ddf.catalog.transform.QueryResponseTransformer"> <service-properties> <entry key="shortname" value="[[sampletransform]]" /> <entry key="title" value="[[Sample Response Transformer]]" /> <entry key="description" value="[[A new transformer for response queues.]]" /> </service-properties> </service> ...

5. Deploy OSGi Bundle to OSGi runtime.

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