org.apache.solr.search
Class SortedIntDocSet

java.lang.Object
  org.apache.solr.search.SortedIntDocSet

All Implemented Interfaces:

DocSet

public class SortedIntDocSet
extends Object

SortedIntDocSet represents a sorted set of Lucene Document Ids.

Field Summary

protected int[]	docs
static SortedIntDocSet	zero
static int[]	zeroInts

Fields inherited from interface org.apache.solr.search.DocSet

EMPTY

Constructor Summary

SortedIntDocSet(int[] docs)

SortedIntDocSet(int[] docs, int len)

Method Summary

void	add(int doc) Adds the specified document if it is not currently in the DocSet (optional operation).
void	addUnique(int doc) Adds a document the caller knows is not currently in the DocSet (optional operation).
DocSet	andNot(DocSet other) Returns the documents in this set that are not in the other set.
static int	andNot(int[] a, int lena, int[] b, int lenb, int[] target) puts the intersection of a and not b into the target array and returns the size
protected static int	andNotBinarySearch(int[] a, int lena, int[] b, int lenb, int[] target)
int	andNotSize(DocSet other) Returns the number of documents in this set that are not in the other set.
protected SortedIntDocSet	clone()
boolean	equals(Object obj)
boolean	exists(int doc) Returns true if a document is in the DocSet.
static int	findIndex(int[] arr, int value, int low, int high)
static int	firstNonSorted(int[] arr, int offset, int len) Returns the index of the first non-sorted element or -1 if they are all sorted
OpenBitSet	getBits() Inefficient base implementation.
int[]	getDocs()
Filter	getTopFilter() Returns a Filter for use in Lucene search methods, assuming this DocSet was generated from the top-level MultiReader that the Lucene search methods will be invoked with.
DocSet	intersection(DocSet other) Returns the intersection of this set with another set.
static int	intersection(int[] a, int lena, int[] b, int lenb, int[] target) puts the intersection of a and b into the target array and returns the size
protected static int	intersectionBinarySearch(int[] a, int lena, int[] b, int lenb, int[] target) Puts the intersection of a and b into the target array and returns the size.
int	intersectionSize(DocSet other) Returns the number of documents of the intersection of this set with another set.
static int	intersectionSize(int[] smallerSortedList, int[] biggerSortedList)
boolean	intersects(DocSet other) Returns true if these sets have any elements in common
static boolean	intersects(int[] smallerSortedList, int[] biggerSortedList)
DocIterator	iterator() Returns an iterator that may be used to iterate over all of the documents in the set.
long	memSize() Returns the approximate amount of memory taken by this DocSet.
void	setBitsOn(OpenBitSet target) Takes the docs from this set and sets those bits on the target OpenBitSet.
static int[]	shrink(int[] arr, int newSize)
int	size() Returns the number of documents in the set.
DocSet	union(DocSet other) Returns the union of this set with another set.
int	unionSize(DocSet other) Returns the number of documents of the union of this set with another set.

Methods inherited from class java.lang.Object

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

Field Detail

docs

protected final int[] docs

zeroInts

public static int[] zeroInts

zero

public static SortedIntDocSet zero

Constructor Detail

SortedIntDocSet

public SortedIntDocSet(int[] docs)

Parameters:

docs - Sorted list of ids

SortedIntDocSet

public SortedIntDocSet(int[] docs,
                       int len)

Parameters:

docs - Sorted list of ids

len - Number of ids in the list

Method Detail

getDocs

public int[] getDocs()

size

public int size()

Description copied from interface: DocSet

Returns the number of documents in the set.

memSize

public long memSize()

Description copied from interface: DocSet

Returns the approximate amount of memory taken by this DocSet. This is only an approximation and doesn't take into account java object overhead.

Returns:

the approximate memory consumption in bytes

shrink

public static int[] shrink(int[] arr,
                           int newSize)

firstNonSorted

public static int firstNonSorted(int[] arr,
                                 int offset,
                                 int len)

Returns the index of the first non-sorted element or -1 if they are all sorted

intersectionSize

public static int intersectionSize(int[] smallerSortedList,
                                   int[] biggerSortedList)

intersects

public static boolean intersects(int[] smallerSortedList,
                                 int[] biggerSortedList)

intersectionSize

public int intersectionSize(DocSet other)

Description copied from interface: DocSet

Returns the number of documents of the intersection of this set with another set. May be more efficient than actually creating the intersection and then getting it's size.

Specified by:

intersectionSize in interface DocSet

intersects

public boolean intersects(DocSet other)

Description copied from interface: DocSet

Returns true if these sets have any elements in common

Specified by:

intersects in interface DocSet

intersection

public static int intersection(int[] a,
                               int lena,
                               int[] b,
                               int lenb,
                               int[] target)

puts the intersection of a and b into the target array and returns the size

intersectionBinarySearch

protected static int intersectionBinarySearch(int[] a,
                                              int lena,
                                              int[] b,
                                              int lenb,
                                              int[] target)

Puts the intersection of a and b into the target array and returns the size. lena should be smaller than lenb

intersection

public DocSet intersection(DocSet other)

Description copied from interface: DocSet

Returns the intersection of this set with another set. Neither set is modified - a new DocSet is created and returned.

Specified by:

intersection in interface DocSet

Returns:

a DocSet representing the intersection

andNotBinarySearch

protected static int andNotBinarySearch(int[] a,
                                        int lena,
                                        int[] b,
                                        int lenb,
                                        int[] target)

andNot

public static int andNot(int[] a,
                         int lena,
                         int[] b,
                         int lenb,
                         int[] target)

puts the intersection of a and not b into the target array and returns the size

andNot

public DocSet andNot(DocSet other)

Description copied from interface: DocSet

Returns the documents in this set that are not in the other set. Neither set is modified - a new DocSet is created and returned.

Specified by:

andNot in interface DocSet

Returns:

a DocSet representing this AND NOT other

setBitsOn

public void setBitsOn(OpenBitSet target)

Description copied from interface: DocSet

Takes the docs from this set and sets those bits on the target OpenBitSet. The target should be sized large enough to accommodate all of the documents before calling this method.

Specified by:

setBitsOn in interface DocSet

exists

public boolean exists(int doc)

Description copied from interface: DocSet

Returns true if a document is in the DocSet.

iterator

public DocIterator iterator()

Description copied from interface: DocSet

Returns an iterator that may be used to iterate over all of the documents in the set.

The order of the documents returned by this iterator is non-deterministic, and any scoring information is meaningless

getBits

public OpenBitSet getBits()

Inefficient base implementation.

Specified by:

getBits in interface DocSet

Returns:

An OpenBitSet with the bit number of every docid set in the set.

See Also:

BitDocSet.getBits()

findIndex

public static int findIndex(int[] arr,
                            int value,
                            int low,
                            int high)

getTopFilter

public Filter getTopFilter()

Description copied from interface: DocSet

Returns a Filter for use in Lucene search methods, assuming this DocSet was generated from the top-level MultiReader that the Lucene search methods will be invoked with.

Specified by:

getTopFilter in interface DocSet

clone

protected SortedIntDocSet clone()

Overrides:

clone in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

add

public void add(int doc)

Description copied from interface: DocSet

Adds the specified document if it is not currently in the DocSet (optional operation).

Specified by:

add in interface DocSet

Throws:

SolrException - Base implementation does not allow modifications

See Also:

DocSet.addUnique(int)

addUnique

public void addUnique(int doc)

Description copied from interface: DocSet

Adds a document the caller knows is not currently in the DocSet (optional operation).

This method may be faster then add(doc) in some implementaions provided the caller is certain of the precondition.

Specified by:

addUnique in interface DocSet

Throws:

SolrException - Base implementation does not allow modifications

See Also:

DocSet.add(int)

union

public DocSet union(DocSet other)

Description copied from interface: DocSet

Returns the union of this set with another set. Neither set is modified - a new DocSet is created and returned.

Specified by:

union in interface DocSet

Returns:

a DocSet representing the union

unionSize

public int unionSize(DocSet other)

Description copied from interface: DocSet

Returns the number of documents of the union of this set with another set. May be more efficient than actually creating the union and then getting it's size.

Specified by:

unionSize in interface DocSet

andNotSize

public int andNotSize(DocSet other)

Description copied from interface: DocSet

Returns the number of documents in this set that are not in the other set.

Specified by:

andNotSize in interface DocSet