Class TemplateTransformer
- java.lang.Object
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- org.apache.solr.handler.dataimport.Transformer
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- org.apache.solr.handler.dataimport.TemplateTransformer
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public class TemplateTransformer extends Transformer
A
Transformer
which can put values into a column by resolving an expression containing other columnsFor 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.
- Since:
- solr 1.3
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Constructor Summary
Constructors Constructor Description TemplateTransformer()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Object
transformRow(Map<String,Object> row, Context context)
The input is a row of data and the output has to be a new row.
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Field Detail
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TEMPLATE
public static final String TEMPLATE
- See Also:
- Constant Field Values
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Method Detail
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transformRow
public Object transformRow(Map<String,Object> row, Context context)
Description copied from class:Transformer
The input is a row of data and the output has to be a new row.- Specified by:
transformRow
in classTransformer
- Parameters:
row
- A row of datacontext
- The current context- Returns:
- The changed data. It must be a
Map
<String
,Object
> if it returns only one row or if there are multiple rows to be returned it must be aList
<Map
<String
,Object
>>
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