com.mysema.query.support

Class ProjectableAdapter<P extends Projectable>

java.lang.Object

com.mysema.query.support.ProjectableAdapter<P>

All Implemented Interfaces:

Projectable

public class ProjectableAdapter<P extends Projectable>
extends Object
implements Projectable

ProjectableAdapter is an adapter implementation for the Projectable interface

Author:

tiwe

Constructor Summary

Constructors

Constructor and Description
ProjectableAdapter(P projectable)

Method Summary

Methods

Modifier and Type	Method and Description
long	count() return the amount of matched rows
boolean	exists()
protected P	getProjectable()
com.mysema.commons.lang.CloseableIterator<Tuple>	iterate(Expression<?>... args) iterate over the results for the given projection
<RT> com.mysema.commons.lang.CloseableIterator<RT>	iterate(Expression<RT> projection) iterate over the results for the given projection
List<Tuple>	list(Expression<?>[] args) list the results for the given projection An empty list is returned for no results.
<RT> List<RT>	list(Expression<RT> projection) list the results for the given projection An empty list is returned for no results.
SearchResults<Tuple>	listResults(Expression<?>... args) list the results for the given projection
<RT> SearchResults<RT>	listResults(Expression<RT> expr) list the results for the given projection
<K,V> Map<K,V>	map(Expression<K> key, Expression<V> value) return the given projection as a Map instance using key and value for Map population An empty map is returned for no results.
boolean	notExists()
Tuple	singleResult(Expression<?>... args) return a single result for the given projection or null if no result is found
<RT> RT	singleResult(Expression<RT> expr) return a single result for the given projection or null if no result is found
String	toString()
<T> T	transform(ResultTransformer<T> transformer) Apply the given transformer to this Projectable instance and return the results
Tuple	uniqueResult(Expression<?>... args) return a unique result for the given projection or null if no result is found
<RT> RT	uniqueResult(Expression<RT> expr) return a unique result for the given projection or null if no result is found

Methods inherited from class java.lang.Object

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

Constructor Detail

ProjectableAdapter

public ProjectableAdapter(P projectable)

Method Detail

getProjectable

protected P getProjectable()

count

public long count()

Description copied from interface: Projectable

return the amount of matched rows

Specified by:

count in interface Projectable

exists

public boolean exists()

Specified by:

exists in interface Projectable

Returns:

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

notExists

public boolean notExists()

Specified by:

notExists in interface Projectable

Returns:

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

iterate

public com.mysema.commons.lang.CloseableIterator<Tuple> iterate(Expression<?>... args)

Description copied from interface: Projectable

iterate over the results for the given projection

Specified by:

iterate in interface Projectable

Returns:

iterate

public <RT> com.mysema.commons.lang.CloseableIterator<RT> iterate(Expression<RT> projection)

Description copied from interface: Projectable

iterate over the results for the given projection

Specified by:

iterate in interface Projectable

Type Parameters:

RT - generic type of the Iterator

Returns:

an Iterator over the projection

list

public List<Tuple> list(Expression<?>[] args)

Description copied from interface: Projectable

list the results for the given projection An empty list is returned for no results.

Specified by:

list in interface Projectable

Returns:

list

public <RT> List<RT> list(Expression<RT> projection)

Description copied from interface: Projectable

list the results for the given projection An empty list is returned for no results.

Specified by:

list in interface Projectable

Type Parameters:

RT - generic type of the List

Returns:

a List over the projection

listResults

public SearchResults<Tuple> listResults(Expression<?>... args)

Description copied from interface: Projectable

list the results for the given projection

Specified by:

listResults in interface Projectable

Returns:

listResults

public <RT> SearchResults<RT> listResults(Expression<RT> expr)

Description copied from interface: Projectable

list the results for the given projection

Specified by:

listResults in interface Projectable

Returns:

map

public <K,V> Map<K,V> map(Expression<K> key,
                 Expression<V> value)

Description copied from interface: Projectable

return the given projection as a Map instance using key and value for Map population An empty map is returned for no results.

Specified by:

map in interface Projectable

Returns:

toString

public String toString()

Overrides:

toString in class Object

singleResult

public Tuple singleResult(Expression<?>... args)

Description copied from interface: Projectable

return a single result for the given projection or null if no result is found

There is some ambiguity for missing results and null valued results, for disambiguation use the list or iterate methods instead.

for multiple results only the first one is returned

Specified by:

singleResult in interface Projectable

Returns:

singleResult

public <RT> RT singleResult(Expression<RT> expr)

Description copied from interface: Projectable

return a single result for the given projection or null if no result is found

There is some ambiguity for missing results and null valued results, for disambiguation use the list or iterate methods instead.

for multiple results only the first one is returned

Specified by:

singleResult in interface Projectable

Type Parameters:

RT - return type

Returns:

the result or null for an empty result

transform

public <T> T transform(ResultTransformer<T> transformer)

Description copied from interface: Projectable

Apply the given transformer to this Projectable instance and return the results

Specified by:

transform in interface Projectable

Returns:

uniqueResult

public Tuple uniqueResult(Expression<?>... args)

Description copied from interface: Projectable

return a unique result for the given projection or null if no result is found

There is some ambiguity for missing results and null valued results, for disambiguation use the list or iterate methods instead.

Specified by:

uniqueResult in interface Projectable

Returns:

uniqueResult

public <RT> RT uniqueResult(Expression<RT> expr)

Description copied from interface: Projectable

return a unique result for the given projection or null if no result is found

There is some ambiguity for missing results and null valued results, for disambiguation use the list or iterate methods instead.

Specified by:

uniqueResult in interface Projectable

Type Parameters:

RT - return type

Returns:

the result or null for an empty result