org.apache.solr.handler.dataimport
Class FieldReaderDataSource

java.lang.Object
  org.apache.solr.handler.dataimport.DataSource<Reader>
      org.apache.solr.handler.dataimport.FieldReaderDataSource

public class FieldReaderDataSource
extends DataSource<Reader>

This can be useful for users who have a DB field containing xml and wish to use a nested XPathEntityProcessor

The datasouce may be configured as follows

The enity which uses this datasource must keep the url value as the variable name url="field-name"

The fieldname must be resolvable from VariableResolver

This may be used with any EntityProcessor which uses a DataSource<Reader> eg: XPathEntityProcessor

Supports String, BLOB, CLOB data types and there is an extra field (in the entity) 'encoding' for BLOB types

Since:

1.4

Field Summary

protected String	dataField
protected VariableResolver	vr

Constructor Summary

FieldReaderDataSource()

Method Summary

void	close() Cleans up resources of this DataSource after use.
Reader	getData(String query) Get records for the given query.The return type depends on the implementation .
void	init(Context context, Properties initProps) Initializes the DataSource with the Context and initialization properties.

Methods inherited from class java.lang.Object

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

Field Detail

vr

protected VariableResolver vr

dataField

protected String dataField

Constructor Detail

FieldReaderDataSource

public FieldReaderDataSource()

Method Detail

init

public void init(Context context,
                 Properties initProps)

Description copied from class: DataSource

Initializes the DataSource with the Context and initialization properties.

This is invoked by the DataImporter after creating an instance of this class.

Specified by:

init in class DataSource<Reader>

getData

public Reader getData(String query)

Description copied from class: DataSource

Get records for the given query.The return type depends on the implementation .

Specified by:

getData in class DataSource<Reader>

Parameters:

query - The query string. It can be a SQL for JdbcDataSource or a URL for HttpDataSource or a file location for FileDataSource or a custom format for your own custom DataSource.

Returns:

Depends on the implementation. For instance JdbcDataSource returns an Iterator<Map <String,Object>>

close

public void close()

Description copied from class: DataSource

Cleans up resources of this DataSource after use.

Specified by:

close in class DataSource<Reader>