org.apache.solr.search.function
Class FileFloatSource

java.lang.Object
  org.apache.lucene.queries.function.ValueSource
      org.apache.solr.search.function.FileFloatSource

public class FileFloatSource
extends ValueSource

Obtains float field values from an external file.

See Also:

ExternalFileField, ExternalFileFieldReloader

Nested Class Summary

static class

FileFloatSource.ReloadCacheRequestHandler

Constructor Summary

FileFloatSource(SchemaField field, SchemaField keyField, float defVal, String datadir)
Creates a new FileFloatSource

Method Summary

String	description()
boolean	equals(Object o)
FunctionValues	getValues(Map context, AtomicReaderContext readerContext)
int	hashCode()
void	refreshCache(IndexReader reader) Refresh the cache for an IndexReader.
static void	resetCache() Remove all cached entries.
String	toString()

Methods inherited from class org.apache.lucene.queries.function.ValueSource

createWeight, getSortField, newContext

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

FileFloatSource

public FileFloatSource(SchemaField field,
                       SchemaField keyField,
                       float defVal,
                       String datadir)

Creates a new FileFloatSource

Parameters:

field - the source's SchemaField

keyField - the field to use as a key

defVal - the default value to use if a field has no entry in the external file

datadir - the directory in which to look for the external file

Method Detail

description

public String description()

Specified by:

description in class ValueSource

getValues

public FunctionValues getValues(Map context,
                                AtomicReaderContext readerContext)
                         throws IOException

Specified by:

getValues in class ValueSource

Throws:

IOException

equals

public boolean equals(Object o)

Specified by:

equals in class ValueSource

hashCode

public int hashCode()

Specified by:

hashCode in class ValueSource

toString

public String toString()

Overrides:

toString in class ValueSource

resetCache

public static void resetCache()

Remove all cached entries. Values are lazily loaded next time getValues() is called.

refreshCache

public void refreshCache(IndexReader reader)

Refresh the cache for an IndexReader. The new values are loaded in the background and then swapped in, so queries against the cache should not block while the reload is happening.

Parameters:

reader - the IndexReader whose cache needs refreshing