Package org.apache.solr.update.processor

Class UniqFieldsUpdateProcessorFactory

java.lang.Object

org.apache.solr.update.processor.UpdateRequestProcessorFactory

org.apache.solr.update.processor.FieldMutatingUpdateProcessorFactory

org.apache.solr.update.processor.FieldValueSubsetUpdateProcessorFactory

org.apache.solr.update.processor.UniqFieldsUpdateProcessorFactory

All Implemented Interfaces:

NamedListInitializedPlugin, SolrCoreAware

public class UniqFieldsUpdateProcessorFactory
extends FieldValueSubsetUpdateProcessorFactory

Removes duplicate values found in fields matching the specified conditions. The existing field values are iterated in order, and values are removed when they are equal to a value that has already been seen for this field.

By default this processor matches no fields.

In the example configuration below, if a document initially contains the values "Steve","Lucy","Jim",Steve","Alice","Bob","Alice" in a field named foo_uniq then using this processor will result in the final list of field values being "Steve","Lucy","Jim","Alice","Bob"

  <processor class="solr.UniqFieldsUpdateProcessorFactory">
    <str name="fieldRegex">.*_uniq</str>
  </processor>
 

Since:

3.4.0

Nested Class Summary

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

FieldMutatingUpdateProcessorFactory.SelectorParams

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

UpdateRequestProcessorFactory.RunAlways

Constructor Summary

Constructors

Constructor	Description
UniqFieldsUpdateProcessorFactory()

Method Summary

Modifier and Type	Method	Description
FieldMutatingUpdateProcessor.FieldNameSelector	getDefaultSelector(SolrCore core)	Defines the default selection behavior when the user has not configured any specific criteria for selecting fields.
<T> Collection<T>	pickSubset(Collection<T> values)	Method subclasses must override to specify which values should be kept.

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

getInstance

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

getSelector, inform, init, parseSelectorExclusionParams, parseSelectorParams

Methods inherited from class java.lang.Object

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

Constructor Details

UniqFieldsUpdateProcessorFactory

public UniqFieldsUpdateProcessorFactory()

Method Details

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

pickSubset

public <T> Collection<T> pickSubset(Collection<T> values)

Description copied from class: FieldValueSubsetUpdateProcessorFactory

Method subclasses must override to specify which values should be kept. This method will not be called unless the collection contains more then one value.

Specified by:

pickSubset in class FieldValueSubsetUpdateProcessorFactory