org.apache.lucene.search.suggest

Class BufferedInputIterator

java.lang.Object

org.apache.lucene.search.suggest.BufferedInputIterator

All Implemented Interfaces:

InputIterator, BytesRefIterator

Direct Known Subclasses:

UnsortedInputIterator

public class BufferedInputIterator
extends java.lang.Object
implements InputIterator

This wrapper buffers incoming elements.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.lucene.search.suggest.InputIterator

InputIterator.InputIteratorWrapper

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.List<java.util.Set<BytesRef>>	contextSets buffered context set entries
protected int	curPos current buffer position
protected BytesRefArray	entries buffered term entries
protected long[]	freqs buffered weights, parallel with entries
protected BytesRefArray	payloads buffered payload entries

Fields inherited from interface org.apache.lucene.search.suggest.InputIterator

EMPTY

Constructor Summary

Constructors

Constructor and Description
BufferedInputIterator(InputIterator source) Creates a new iterator, buffering entries from the specified iterator

Method Summary

Modifier and Type	Method and Description
java.util.Set<BytesRef>	contexts() A term's contexts context can be used to filter suggestions.
boolean	hasContexts() Returns true if the iterator has contexts
boolean	hasPayloads() Returns true if the iterator has payloads
BytesRef	next() Increments the iteration to the next BytesRef in the iterator.
BytesRef	payload() An arbitrary byte[] to record per suggestion.
long	weight() A term's weight, higher numbers mean better suggestions.

Methods inherited from class java.lang.Object

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

Field Detail

entries

protected BytesRefArray entries

buffered term entries

payloads

protected BytesRefArray payloads

buffered payload entries

contextSets

protected java.util.List<java.util.Set<BytesRef>> contextSets

buffered context set entries

curPos

protected int curPos

current buffer position

freqs

protected long[] freqs

buffered weights, parallel with entries

Constructor Detail

BufferedInputIterator

public BufferedInputIterator(InputIterator source)
                      throws java.io.IOException

Creates a new iterator, buffering entries from the specified iterator

Throws:

java.io.IOException

Method Detail

weight

public long weight()

Description copied from interface: InputIterator

A term's weight, higher numbers mean better suggestions.

Specified by:

weight in interface InputIterator

next

public BytesRef next()
              throws java.io.IOException

Description copied from interface: BytesRefIterator

Increments the iteration to the next BytesRef in the iterator. Returns the resulting BytesRef or null if the end of the iterator is reached. The returned BytesRef may be re-used across calls to next. After this method returns null, do not call it again: the results are undefined.

Specified by:

next in interface BytesRefIterator

Returns:

the next BytesRef in the iterator or null if the end of the iterator is reached.

Throws:

java.io.IOException - If there is a low-level I/O error.

payload

public BytesRef payload()

Description copied from interface: InputIterator

An arbitrary byte[] to record per suggestion. See Lookup.LookupResult.payload to retrieve the payload for each suggestion.

Specified by:

payload in interface InputIterator

hasPayloads

public boolean hasPayloads()

Description copied from interface: InputIterator

Returns true if the iterator has payloads

Specified by:

hasPayloads in interface InputIterator

contexts

public java.util.Set<BytesRef> contexts()

Description copied from interface: InputIterator

A term's contexts context can be used to filter suggestions. May return null, if suggest entries do not have any context

Specified by:

contexts in interface InputIterator

hasContexts

public boolean hasContexts()

Description copied from interface: InputIterator

Returns true if the iterator has contexts

Specified by:

hasContexts in interface InputIterator