org.apache.solr.update.processor
Class ConcatFieldUpdateProcessorFactory

java.lang.Object
  org.apache.solr.update.processor.UpdateRequestProcessorFactory
      org.apache.solr.update.processor.FieldMutatingUpdateProcessorFactory
          org.apache.solr.update.processor.ConcatFieldUpdateProcessorFactory

All Implemented Interfaces:

NamedListInitializedPlugin, SolrCoreAware

public final class ConcatFieldUpdateProcessorFactory
extends FieldMutatingUpdateProcessorFactory

Concatenates multiple values for fields matching the specified conditions using a configurable delimiter which defaults to ", ".

By default, this processor concatenates the values for any field name which according to the schema is multiValued="false" and uses TextField or StrField

For example, in the configuration below, any "single valued" string and text field which is found to contain multiple values except for the primary_author field will be concatenated using the string "; " as a delimeter. For the primary_author field, the multiple values will be left alone for FirstFieldValueUpdateProcessorFactory to deal with.

 <processor class="solr.ConcatFieldUpdateProcessorFactory">
   <str name="delimiter">; </str>
   <lst name="exclude">
     <str name="fieldName">primary_author</str>
   </lst>
 </processor>
 <processor class="solr.FirstFieldValueUpdateProcessorFactory">
   <str name="fieldName">primary_author</str>
 </processor>

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.solr.update.processor.FieldMutatingUpdateProcessorFactory

FieldMutatingUpdateProcessorFactory.SelectorParams

Constructor Summary

ConcatFieldUpdateProcessorFactory()

Method Summary

FieldMutatingUpdateProcessor.FieldNameSelector	getDefaultSelector(SolrCore core) Defines the default selection behavior when the user has not configured any specific criteria for selecting fields.
UpdateRequestProcessor	getInstance(SolrQueryRequest req, SolrQueryResponse rsp, UpdateRequestProcessor next)
void	init(NamedList args) Handles common initialization related to source fields for constructoring the FieldNameSelector to be used.

Methods inherited from class org.apache.solr.update.processor.FieldMutatingUpdateProcessorFactory

getSelector, inform, oneOrMany, parseSelectorParams

Methods inherited from class java.lang.Object

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

Constructor Detail

ConcatFieldUpdateProcessorFactory

public ConcatFieldUpdateProcessorFactory()

Method Detail

init

public void init(NamedList args)

Description copied from class: FieldMutatingUpdateProcessorFactory

Handles common initialization related to source fields for constructoring the FieldNameSelector to be used. Will error if any unexpected init args are found, so subclasses should remove any subclass-specific init args before calling this method.

Specified by:

init in interface NamedListInitializedPlugin

Overrides:

init in class FieldMutatingUpdateProcessorFactory

getInstance

public UpdateRequestProcessor getInstance(SolrQueryRequest req,
                                          SolrQueryResponse rsp,
                                          UpdateRequestProcessor next)

Specified by:

getInstance in class UpdateRequestProcessorFactory

getDefaultSelector

public FieldMutatingUpdateProcessor.FieldNameSelector getDefaultSelector(SolrCore core)

Description copied from class: FieldMutatingUpdateProcessorFactory

Defines the default selection behavior when the user has not configured any specific criteria for selecting fields. The Default implementation matches all fields, and should be overridden by subclasses as needed.

Overrides:

getDefaultSelector in class FieldMutatingUpdateProcessorFactory

See Also:

FieldMutatingUpdateProcessor.SELECT_ALL_FIELDS