public class TemplateTransformer extends Transformer
A Transformer
which can put values into a column by resolving an expression
containing other columns
For example:
<field column="name" template="${e.lastName}, ${e.firstName}
${e.middleName}" /> will produce the name by combining values from
lastName, firstName and middleName fields as given in the template attribute.
Refer to http://wiki.apache.org/solr/DataImportHandler for more details.
This API is experimental and may change in the future.
Constructor and Description |
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TemplateTransformer() |
Modifier and Type | Method and Description |
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Object |
transformRow(Map<String,Object> row,
Context context)
The input is a row of data and the output has to be a new row.
|
public static final String TEMPLATE
public Object transformRow(Map<String,Object> row, Context context)
Transformer
transformRow
in class Transformer
row
- A row of datacontext
- The current contextMap
<String
, Object
> if it returns
only one row or if there are multiple rows to be returned it must
be a List
<Map
<String
, Object
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