org.apache.solr.handler.dataimport
Class TemplateTransformer

java.lang.Object
  org.apache.solr.handler.dataimport.Transformer
      org.apache.solr.handler.dataimport.TemplateTransformer

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.

Since:

solr 1.3

Field Summary

static String

TEMPLATE

Constructor Summary

TemplateTransformer()

Method Summary

Object

transformRow(Map<String,Object> row, Context context) The input is a row of data and the output has to be a new row.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

TEMPLATE

public static final String TEMPLATE

See Also:

Constant Field Values

Constructor Detail

TemplateTransformer

public TemplateTransformer()

Method Detail

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 class Transformer

Parameters:

row - A row of data

context - 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 a List<Map<String, Object>>