Package org.apache.jackrabbit.core.query.lucene.sort

Class AbstractFieldComparator

java.lang.Object

org.apache.lucene.search.FieldComparator

org.apache.jackrabbit.core.query.lucene.FieldComparatorBase

org.apache.jackrabbit.core.query.lucene.sort.AbstractFieldComparator

Direct Known Subclasses:

DynamicOperandFieldComparator

public abstract class AbstractFieldComparator
extends FieldComparatorBase

Abstract base class for FieldComparators which keep their values (Comparables) in an array.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.search.FieldComparator

FieldComparator.ByteComparator, FieldComparator.DocComparator, FieldComparator.DoubleComparator, FieldComparator.FloatComparator, FieldComparator.IntComparator, FieldComparator.LongComparator, FieldComparator.NumericComparator<T extends Number>, FieldComparator.RelevanceComparator, FieldComparator.ShortComparator, FieldComparator.StringComparatorLocale, FieldComparator.StringOrdValComparator, FieldComparator.StringValComparator

Field Summary

Fields

Modifier and Type	Field	Description
protected List<IndexReader>	readers	The index readers.
protected int[]	starts	The document number starts for the readers.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractFieldComparator(int numHits)	Create a new instance with the given number of values.

Method Summary

Modifier and Type	Method	Description
protected String	getUUIDForIndex(int doc)
Comparable<?>	getValue(int slot)	Return a value from the values array
protected int	readerIndex(int n)	Returns the reader index for document n.
void	setNextReader(IndexReader reader, int docBase)
void	setValue(int slot, Comparable<?> value)	Add the given value to the values array

Methods inherited from class org.apache.jackrabbit.core.query.lucene.FieldComparatorBase

compare, compare, compareBottom, copy, setBottom, sortValue, value

Methods inherited from class org.apache.lucene.search.FieldComparator

binarySearch, binarySearch, compareValues, setScorer

Methods inherited from class java.lang.Object

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

Field Detail

readers

protected final List<IndexReader> readers

The index readers.

starts

protected int[] starts

The document number starts for the readers.

Constructor Detail

AbstractFieldComparator

protected AbstractFieldComparator(int numHits)

Create a new instance with the given number of values.

Parameters:

numHits - the number of values

Method Detail

readerIndex

protected final int readerIndex(int n)

Returns the reader index for document n.

Parameters:

n - document number.

Returns:

the reader index.

setValue

public void setValue(int slot,
                     Comparable<?> value)

Add the given value to the values array

Specified by:

setValue in class FieldComparatorBase

Parameters:

slot - index into values

value - value for adding

getValue

public Comparable<?> getValue(int slot)

Return a value from the values array

Specified by:

getValue in class FieldComparatorBase

Parameters:

slot - index to retrieve

Returns:

the retrieved value

setNextReader

public void setNextReader(IndexReader reader,
                          int docBase)
                   throws IOException

Specified by:

setNextReader in class FieldComparator

Throws:

IOException

getUUIDForIndex

protected String getUUIDForIndex(int doc)
                          throws IOException

Throws:

IOException