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 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>
- See Also:
MinFieldValueUpdateProcessorFactory
,
Collections.max(java.util.Collection extends T>)
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
MaxFieldValueUpdateProcessorFactory
public MaxFieldValueUpdateProcessorFactory()
pickSubset
public Collection pickSubset(Collection 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
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