Package org.apache.solr.update.processor

Class MaxFieldValueUpdateProcessorFactory

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.MaxFieldValueUpdateProcessorFactory

All Implemented Interfaces:

NamedListInitializedPlugin, SolrCoreAware

public final class MaxFieldValueUpdateProcessorFactory
extends FieldValueSubsetUpdateProcessorFactory

An update processor that keeps only the maximum value from any selected fields where multiple values are found. Correct behavior requires tha all of the values in the SolrInputFields being mutated are mutually comparable; If this is not the case, then a SolrException will br thrown.

By default, this processor matches no fields.

In the example configuration below, if a document contains multiple integer values (ie: 64, 128, 1024) in the field largestFileSize then only the biggest value (ie: 1024) will be kept in that field.

  <processor class="solr.MaxFieldValueUpdateProcessorFactory">
    <str name="fieldName">largestFileSize</str>
  </processor>
 

Since:

4.0.0

See Also:

MinFieldValueUpdateProcessorFactory, Collections.max(java.util.Collection<? extends T>)

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
MaxFieldValueUpdateProcessorFactory()

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 Detail

MaxFieldValueUpdateProcessorFactory

public MaxFieldValueUpdateProcessorFactory()

Method Detail

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

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