com.jalios.jcms
Class QueryResultSet

java.lang.Object
  java.util.AbstractCollection<E>
      java.util.AbstractSet<E>
          java.util.HashSet<Publication>
              com.jalios.jcms.QueryResultSet

All Implemented Interfaces:

Serializable, Cloneable, Iterable<Publication>, Collection<Publication>, Set<Publication>

public class QueryResultSet
extends HashSet<Publication>

This class holds results of a query.
It keeps tracks of all results (Publication) from a query and their scores.

Since:

jcms-5.5.0

Version:

$Revision: 23896 $

Author:

Olivier Jaquemet

See Also:

Serialized Form

Nested Class Summary

static class

QueryResultSet.ScoreComparator This Comparator compares two Objects using a score retrieved from a map of Object to float.

Field Summary

static String

REVISION

Constructor Summary

QueryResultSet()

Method Summary

boolean	add(Publication pub, float score) Adds the given Publication and its score to this QueryResultSet.
boolean	addAll(Collection<? extends Publication> coll) Overrides AbstractCollection.addAll(Collection) to call when addAll(QueryResultSet) if the specified collection is a QueryResultSet.
boolean	addAll(Collection<? extends Publication> coll, float score) Adds all the Publication in the specified collection to this QueryResultSet.
boolean	addAll(PageResult<Publication> pr)
boolean	addAll(QueryResultSet resultSet) Adds all the Publication in the specified result Set to this QueryResultSet.
void	clear() Clear all Object from this result set (also remove associated score).
SortedSet<Publication>	getAsSortedSet() Gets all the results contained in this QueryResultSet as a SortedSet (a TreeSet) using the ScoreComparator.
SortedSet<Publication>	getAsSortedSet(Comparator comparator) Gets all the results contained in this QueryResultSet as a SortedSet (a TreeSet) using the given Comparator or none if null.
Object	getAttribute(String name) Returns the value of the named attribute as an Object, or null if no attribute of the given name exists.
Map<String,Object>	getAttributeMap() Returns a java.util.Map of the attributes of this results.
float	getMaxScore() Retrieve the maximum score value available in this QueryResultSet.
int	getResultSize()
float	getScore(Object obj) Deprecated. use getScore(Publication)
float	getScore(Publication pub) Retrieve score of the specified Publication.
static Comparator	getScoreComparator(QueryResultSet resultSet, Comparator parentComparator) Gets a new instance of a ScoreComparator for relevance sorting of the given QueryResultSet.
int	getTotalSize()
boolean	remove(Object o) Remove the given Object from this result set (also remove associated score).
Object	removeAttribute(String name) Removes an attribute from this result.
boolean	retainAll(Collection<?> coll) Overrides AbstractCollection.retainAll(Collection) to call when retainAll(QueryResultSet) if the specified collection is a QueryResultSet.
boolean	retainAll(QueryResultSet resultSet) Retains only the elements in this QueryResultSet that are contained in the specified QueryResultSet.
Object	setAttribute(String name, Object obj) Stores an attribute in this result.
void	setTotalSize(int totalSize)

Methods inherited from class java.util.HashSet

add, clone, contains, isEmpty, iterator, size

Methods inherited from class java.util.AbstractSet

equals, hashCode, removeAll

Methods inherited from class java.util.AbstractCollection

containsAll, toArray, toArray, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Set

containsAll, equals, hashCode, removeAll, toArray, toArray

Field Detail

REVISION

public static final String REVISION

See Also:

Constant Field Values

Constructor Detail

QueryResultSet

public QueryResultSet()

Method Detail

setAttribute

public Object setAttribute(String name,
                           Object obj)

Stores an attribute in this result.
If the object passed in is null, the effect is the same as calling removeAttribute(java.lang.String).

Parameters:

name - a String specifying the name of the attribute

obj - the Object to be stored

Returns:

previous value associated with specified name, or null if there was no mapping for name. A null return can also indicate that null was associated with the specified name.

removeAttribute

public Object removeAttribute(String name)

Removes an attribute from this result.

Parameters:

name - a String specifying

Returns:

previous value associated with specified name, or null if there was no mapping for name. A null return can also indicate that null was associated with the specified name.

getAttribute

public Object getAttribute(String name)

Returns the value of the named attribute as an Object, or null if no attribute of the given name exists.

Parameters:

name - a String specifying the name of the attribute

Returns:

an Object containing the value of the attribute, or null if the attribute does not exist

getAttributeMap

public Map<String,Object> getAttributeMap()

Returns a java.util.Map of the attributes of this results.

Returns:

the internal Map used by this results, modify with care.

add

public boolean add(Publication pub,
                   float score)

Adds the given Publication and its score to this QueryResultSet.
If a score for the given Object was already in this QueryResultSet for a given element, its score is replaced.

Parameters:

pub - the Publication to add.

score - the new score of the Publication

Returns:

true if the set did not already contain the specified element.

Since:

jcms-5.5.0

addAll

public boolean addAll(Collection<? extends Publication> coll,
                      float score)

Adds all the Publication in the specified collection to this QueryResultSet.
If a score was already in the Collection for a given element, its score is replaced.

Parameters:

coll - collection whose elements are to be added to this collection.

score - the score of the Publication in the Collection (should be between 0.0f and 1.0f)

Returns:

true if this collection changed as a result of the call.

Since:

jcms-5.5.0

addAll

public boolean addAll(QueryResultSet resultSet)

Adds all the Publication in the specified result Set to this QueryResultSet. Also puts all attribute of the specified QueryResultSet into this QueryResultSet.
If a Publication was already in this QueryResultSet, it is replaced with its score in the given QueryResultSet.

Parameters:

resultSet - QueryResultSet whose elements are to be added to this QueryResultSet.

Returns:

true if this collection changed as a result of the call.

Since:

jcms-5.5.0

retainAll

public boolean retainAll(QueryResultSet resultSet)

Retains only the elements in this QueryResultSet that are contained in the specified QueryResultSet. In other words, removes from this QueryResultSet all of its elements that are not contained in the specified QueryResultSet.

Also updates scores of elements kept in this QueryResultSet if their existing score are below the score of the specified QueryResultSet.

Parameters:

resultSet - elements to be retained in this collection.

Returns:

true if this QueryResultSet changed as a result of the call.

Since:

jcms-5.7.0

addAll

public boolean addAll(Collection<? extends Publication> coll)

Overrides AbstractCollection.addAll(Collection) to call when addAll(QueryResultSet) if the specified collection is a QueryResultSet.

Specified by:

addAll in interface Collection<Publication>

Specified by:

addAll in interface Set<Publication>

Overrides:

addAll in class AbstractCollection<Publication>

Since:

jcms-5.7.0

See Also:

addAll(QueryResultSet), AbstractCollection.addAll(Collection)

retainAll

public boolean retainAll(Collection<?> coll)

Overrides AbstractCollection.retainAll(Collection) to call when retainAll(QueryResultSet) if the specified collection is a QueryResultSet.

Specified by:

retainAll in interface Collection<Publication>

Specified by:

retainAll in interface Set<Publication>

Overrides:

retainAll in class AbstractCollection<Publication>

Since:

jcms-5.7.0

See Also:

retainAll(QueryResultSet), AbstractCollection.retainAll(Collection)

addAll

public boolean addAll(PageResult<Publication> pr)

remove

public boolean remove(Object o)

Remove the given Object from this result set (also remove associated score).

Specified by:

remove in interface Collection<Publication>

Specified by:

remove in interface Set<Publication>

Overrides:

remove in class HashSet<Publication>

Since:

jcms-5.5.0

See Also:

HashSet.remove(java.lang.Object)

clear

public void clear()

Clear all Object from this result set (also remove associated score).

Specified by:

clear in interface Collection<Publication>

Specified by:

clear in interface Set<Publication>

Overrides:

clear in class HashSet<Publication>

Since:

jcms-5.5.0

See Also:

HashSet.clear()

getScore

public float getScore(Object obj)

Deprecated. use getScore(Publication)

Retrieve score of the given Object (a Publication).

Parameters:

obj - the Object (a Publication) from which to retrieve the score.

Returns:

score associated with given obj or 0.0f if no score is available for this Object.

Since:

jcms-5.5.0

getScore

public float getScore(Publication pub)

Retrieve score of the specified Publication.

Parameters:

pub - the Publication from which to retrieve the score.

Returns:

score associated with given obj or 0.0f if no score is available for this Publication.

Since:

jcms-6.0.0

getMaxScore

public float getMaxScore()

Retrieve the maximum score value available in this QueryResultSet.

Returns:

a float with the maximum score value.

getAsSortedSet

public SortedSet<Publication> getAsSortedSet()

Gets all the results contained in this QueryResultSet as a SortedSet (a TreeSet) using the ScoreComparator. Because this method sort all the result in a new TreeSet, this method is expensive, be careful when using it.

Returns:

a new SortedSet (a TreeSet) using ScoreComparator.

Since:

jcms-5.5.0

See Also:

QueryResultSet.ScoreComparator

getAsSortedSet

public SortedSet<Publication> getAsSortedSet(Comparator comparator)

Gets all the results contained in this QueryResultSet as a SortedSet (a TreeSet) using the given Comparator or none if null. Because this method sort all the result in a new TreeSet, this method is expensive, be careful when using it.

Parameters:

comparator - the Comparator to use in the SortedSet, can be null to sort using natural order.

Returns:

a new SortedSet (a TreeSet) using ScoreComparator.

Since:

jcms-5.5.0

See Also:

QueryResultSet.ScoreComparator

getScoreComparator

public static Comparator getScoreComparator(QueryResultSet resultSet,
                                            Comparator parentComparator)

Gets a new instance of a ScoreComparator for relevance sorting of the given QueryResultSet.

Parameters:

resultSet - the QueryResultSet from which to retrieve score of each Publication.

parentComparator - the Comparator to use when score of compared Object are identical.

Returns:

parentComparator is resultSet is null, new instance of ScoreComparator using the given parent Comparator.

See Also:

QueryResultSet.ScoreComparator

getTotalSize

public int getTotalSize()

setTotalSize

public void setTotalSize(int totalSize)

getResultSize

public int getResultSize()