com.mysema.query.lucene

Class AbstractLuceneQuery<T,Q extends AbstractLuceneQuery<T,Q>>

java.lang.Object

com.mysema.query.lucene.AbstractLuceneQuery<T,Q>

Type Parameters:

T - projection type

Q - concrete subtype of query

All Implemented Interfaces:

FilteredClause<Q>, SimpleProjectable<T>, SimpleQuery<Q>

Direct Known Subclasses:

LuceneQuery, TypedQuery

public abstract class AbstractLuceneQuery<T,Q extends AbstractLuceneQuery<T,Q>>
extends Object
implements SimpleQuery<Q>, SimpleProjectable<T>

AbstractLuceneQuery is an abstract super class for Lucene query implementations

Author:

tiwe

Constructor Summary

Constructors

Constructor and Description
AbstractLuceneQuery(org.apache.lucene.search.IndexSearcher searcher, com.google.common.base.Function<org.apache.lucene.document.Document,T> transformer)
AbstractLuceneQuery(LuceneSerializer serializer, org.apache.lucene.search.IndexSearcher searcher, com.google.common.base.Function<org.apache.lucene.document.Document,T> transformer)

Method Summary

Modifier and Type	Method and Description
org.apache.lucene.search.Filter	asFilter() Create a filter for constraints defined in this query
long	count() Get the count of matched elements
protected org.apache.lucene.search.Query	createQuery()
Q	distinct() Set the Query to return distinct results
Q	distinct(Path<?> property) Add a DuplicateFilter for the field of the given property path
boolean	exists()
Q	filter(org.apache.lucene.search.Filter filter) Apply the given Lucene filter to the search results
com.mysema.commons.lang.CloseableIterator<T>	iterate() Get the projection as a typed closeable Iterator
Q	limit(long limit) Set the limit / max results for the query results
List<T>	list() Get the projection as a typed List
SearchResults<T>	listResults() Get the projection in SearchResults form
Q	load(FieldSelector fieldSelector) Set the given FieldSelector to the query
Q	load(Path<?>... paths) Load only the fields of the given paths
boolean	notExists()
Q	offset(long offset) Set the offset for the query results
Q	orderBy(OrderSpecifier<?>... o) Add order expressions
Q	orderBy(OrderSpecifier<?> o)
Q	restrict(QueryModifiers modifiers) Set both limit and offset of the query results
<P> Q	set(ParamExpression<P> param, P value) Set the given parameter to the given value
T	singleResult() Get the projection as a single result or null if no result is found
Q	sort(org.apache.lucene.search.Sort sort)
String	toString()
T	uniqueResult() Get the projection as a unique result or null if no result is found
Q	where(Predicate... e) Adds the given filter conditions
Q	where(Predicate e)

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractLuceneQuery

public AbstractLuceneQuery(LuceneSerializer serializer,
                           org.apache.lucene.search.IndexSearcher searcher,
                           com.google.common.base.Function<org.apache.lucene.document.Document,T> transformer)

AbstractLuceneQuery

public AbstractLuceneQuery(org.apache.lucene.search.IndexSearcher searcher,
                           com.google.common.base.Function<org.apache.lucene.document.Document,T> transformer)

Method Detail

exists

public boolean exists()

Specified by:

exists in interface SimpleProjectable<T>

Returns:

true, if rows matching the given criteria exist, otherwise false

notExists

public boolean notExists()

Specified by:

notExists in interface SimpleProjectable<T>

Returns:

true, if no rows matching the given criteria exist, otherwise false

count

public long count()

Description copied from interface: SimpleProjectable

Get the count of matched elements

Specified by:

count in interface SimpleProjectable<T>

Returns:

createQuery

protected org.apache.lucene.search.Query createQuery()

asFilter

public org.apache.lucene.search.Filter asFilter()

Create a filter for constraints defined in this query

Returns:

distinct

public Q distinct()

Description copied from interface: SimpleQuery

Set the Query to return distinct results

Specified by:

distinct in interface SimpleQuery<Q extends AbstractLuceneQuery<T,Q>>

Returns:

distinct

public Q distinct(Path<?> property)

Add a DuplicateFilter for the field of the given property path

Parameters:

property -

Returns:

filter

public Q filter(org.apache.lucene.search.Filter filter)

Apply the given Lucene filter to the search results

Parameters:

filter -

Returns:

limit

public Q limit(long limit)

Description copied from interface: SimpleQuery

Set the limit / max results for the query results

Specified by:

limit in interface SimpleQuery<Q extends AbstractLuceneQuery<T,Q>>

Returns:

iterate

public com.mysema.commons.lang.CloseableIterator<T> iterate()

Description copied from interface: SimpleProjectable

Get the projection as a typed closeable Iterator

Specified by:

iterate in interface SimpleProjectable<T>

Returns:

list

public List<T> list()

Description copied from interface: SimpleProjectable

Get the projection as a typed List

Specified by:

list in interface SimpleProjectable<T>

Returns:

load

public Q load(FieldSelector fieldSelector)

Set the given FieldSelector to the query

Parameters:

fieldSelector -

Returns:

load

public Q load(Path<?>... paths)

Load only the fields of the given paths

Parameters:

paths -

Returns:

listResults

public SearchResults<T> listResults()

Description copied from interface: SimpleProjectable

Get the projection in SearchResults form

Specified by:

listResults in interface SimpleProjectable<T>

Returns:

offset

public Q offset(long offset)

Description copied from interface: SimpleQuery

Set the offset for the query results

Specified by:

offset in interface SimpleQuery<Q extends AbstractLuceneQuery<T,Q>>

Returns:

orderBy

public Q orderBy(OrderSpecifier<?> o)

orderBy

public Q orderBy(OrderSpecifier<?>... o)

Description copied from interface: SimpleQuery

Add order expressions

Specified by:

orderBy in interface SimpleQuery<Q extends AbstractLuceneQuery<T,Q>>

Returns:

restrict

public Q restrict(QueryModifiers modifiers)

Description copied from interface: SimpleQuery

Set both limit and offset of the query results

Specified by:

restrict in interface SimpleQuery<Q extends AbstractLuceneQuery<T,Q>>

Returns:

set

public <P> Q set(ParamExpression<P> param,
                 P value)

Description copied from interface: SimpleQuery

Set the given parameter to the given value

Specified by:

set in interface SimpleQuery<Q extends AbstractLuceneQuery<T,Q>>

Returns:

sort

public Q sort(org.apache.lucene.search.Sort sort)

singleResult

public T singleResult()

Description copied from interface: SimpleProjectable

Get the projection as a single result or null if no result is found

for multiple results only the first one is returned

Specified by:

singleResult in interface SimpleProjectable<T>

Returns:

uniqueResult

public T uniqueResult()

Description copied from interface: SimpleProjectable

Get the projection as a unique result or null if no result is found

Specified by:

uniqueResult in interface SimpleProjectable<T>

Returns:

where

public Q where(Predicate e)

where

public Q where(Predicate... e)

Description copied from interface: FilteredClause

Adds the given filter conditions

Skips null arguments

Specified by:

where in interface FilteredClause<Q extends AbstractLuceneQuery<T,Q>>

Parameters:

e - filter conditions to be added

Returns:

toString

public String toString()

Overrides:

toString in class Object