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The following page has been changed by ShalinMangar: http://wiki.apache.org/solr/DataImportHandler The comment on the change is: fixed typos ------------------------------------------------------------------------------ == Transformer == Every row that is fetched from the DB can be either consumed directly or it can be massaged to create a totally new set of fields or it can even return more than one row of data. The configuration must be done on an entity level as follows. {{{ - <entity name="foo" tranfromer="com.foo.Foo" ... /> + <entity name="foo" transformer="com.foo.Foo" ... /> }}} the class 'Foo' must implement the interface `org.apache.solr.hander.dataimport.Transformer` The interface has ony one method. @@ -182, +182 @@ The Context is the interface that provides the contextual information necessary to process the data. - The confiuration has a 'flexible' schema. It lets the user provide arbitrary attributes in an 'entity' tag and 'field' tags. The tool reads the data and hands it over to the implementation class as it is. If the 'Transformer' needs extra information to be provided on a per entity/field basis it can do so. The values can be obtained from the Context. + The configuration has a 'flexible' schema. It lets the user provide arbitrary attributes in an 'entity' tag and 'field' tags. The tool reads the data and hands it over to the implementation class as it is. If the 'Transformer' needs extra information to be provided on a per entity/field basis it can do so. The values can be obtained from the Context. There is an inbuilt transformer called '!RegExpTransfromer' provided with the tool itself. It helps in extracting values from fields (from db) using Regular Expressions.
