TemplateTransformer (Solr 7.7.0 API)

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

Fields
Modifier and Type Field Description

static String TEMPLATE

Constructor Summary

Constructors
Constructor Description

TemplateTransformer()

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.

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>>