org.apache.lucene.codecs
Class PerDocProducerBase

java.lang.Object
  org.apache.lucene.codecs.PerDocProducer
      org.apache.lucene.codecs.PerDocProducerBase

All Implemented Interfaces:

Closeable

Direct Known Subclasses:

Lucene40DocValuesProducer, SepDocValuesProducer, SimpleTextPerDocProducer

public abstract class PerDocProducerBase
extends PerDocProducer

Abstract base class for PerDocProducer implementations

WARNING: This API is experimental and might change in incompatible ways in the next release.

Constructor Summary

PerDocProducerBase()

Method Summary

protected boolean	anyDocValuesFields(FieldInfos infos)
protected boolean	canLoad(FieldInfo info)
void	close()
protected abstract void	closeInternal(Collection<? extends Closeable> closeables)
protected abstract Map<String,DocValues>	docValues()
DocValues	docValues(String field) Returns DocValues for the current field.
static String	docValuesId(String segmentsName, int fieldId)
Comparator<BytesRef>	getComparator()
protected DocValues.Type	getDocValuesType(FieldInfo info)
protected TreeMap<String,DocValues>	load(FieldInfos fieldInfos, String segment, int docCount, Directory dir, IOContext context)
protected abstract DocValues	loadDocValues(int docCount, Directory dir, String id, DocValues.Type type, IOContext context) Loads a DocValues instance depending on the given DocValues.Type.

Methods inherited from class java.lang.Object

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

Constructor Detail

PerDocProducerBase

public PerDocProducerBase()

Method Detail

closeInternal

protected abstract void closeInternal(Collection<? extends Closeable> closeables)
                               throws IOException

Throws:

IOException

docValues

protected abstract Map<String,DocValues> docValues()

close

public void close()
           throws IOException

Throws:

IOException

docValues

public DocValues docValues(String field)
                    throws IOException

Description copied from class: PerDocProducer

Returns DocValues for the current field.

Specified by:

docValues in class PerDocProducer

Parameters:

field - the field name

Returns:

the DocValues for this field or null if not applicable.

Throws:

IOException

getComparator

public Comparator<BytesRef> getComparator()
                                   throws IOException

Throws:

IOException

load

protected TreeMap<String,DocValues> load(FieldInfos fieldInfos,
                                         String segment,
                                         int docCount,
                                         Directory dir,
                                         IOContext context)
                                  throws IOException

Throws:

IOException

canLoad

protected boolean canLoad(FieldInfo info)

getDocValuesType

protected DocValues.Type getDocValuesType(FieldInfo info)

anyDocValuesFields

protected boolean anyDocValuesFields(FieldInfos infos)

docValuesId

public static String docValuesId(String segmentsName,
                                 int fieldId)

loadDocValues

protected abstract DocValues loadDocValues(int docCount,
                                           Directory dir,
                                           String id,
                                           DocValues.Type type,
                                           IOContext context)
                                    throws IOException

Loads a DocValues instance depending on the given DocValues.Type. Codecs that use different implementations for a certain DocValues.Type can simply override this method and return their custom implementations.

Parameters:

docCount - number of documents in the segment

dir - the Directory to load the DocValues from

id - the unique file ID within the segment

type - the type to load

Returns:

a DocValues instance for the given type

Throws:

IOException - if an IOException occurs

IllegalArgumentException - if the given DocValues.Type is not supported