com.atlassian.jira.entity
Class SelectQueryImpl.ExecutionContextImpl<E>

java.lang.Object
  com.atlassian.jira.entity.SelectQueryImpl.ExecutionContextImpl<E>

All Implemented Interfaces:

SelectQuery.ExecutionContext<E>

Enclosing class:

SelectQueryImpl<E>

public final class SelectQueryImpl.ExecutionContextImpl<E>
extends Object
implements SelectQuery.ExecutionContext<E>

Constructor Summary

SelectQueryImpl.ExecutionContextImpl(OfBizDelegator ofBizDelegator, EntityBuilder<E> entityBuilder)

Method Summary

List<E>	asList() Returns the selected values in a list.
<R> List<R>	asList(Function<E,R> mappingFunction) Returns the selected values in a list with the mapping function applied to each of them.
<R> R	consumeWith(EntityListConsumer<E,R> consumer) Apply an EntityListConsumer to the returned results.
long	count() Returns a count of matching items.
E	singleValue() Returns the single Entity that is the result of this query.
String	toString()
void	visitWith(Visitor<E> visitor) Visits each entity returned by the query.

Methods inherited from class java.lang.Object

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

Constructor Detail

SelectQueryImpl.ExecutionContextImpl

public SelectQueryImpl.ExecutionContextImpl(OfBizDelegator ofBizDelegator,
                                            EntityBuilder<E> entityBuilder)

Method Detail

asList

@Nonnull
public List<E> asList()

Description copied from interface: SelectQuery.ExecutionContext

Returns the selected values in a list.

Specified by:

asList in interface SelectQuery.ExecutionContext<E>

Returns:

the selected values in a list.

asList

@Nonnull
public <R> List<R> asList(@Nonnull
                                  Function<E,R> mappingFunction)

Description copied from interface: SelectQuery.ExecutionContext

Returns the selected values in a list with the mapping function applied to each of them. For example, if mappingFunction is a Function<GenericValue,String>, then each value is returned as the String produced by the function instead of the GenericValue itself.

Specified by:

asList in interface SelectQuery.ExecutionContext<E>

Type Parameters:

R - the type of value returned by the mapping function

Returns:

the selected values as a list of the yielded values.

singleValue

@Nullable
public E singleValue()
              throws IllegalStateException

Description copied from interface: SelectQuery.ExecutionContext

Returns the single Entity that is the result of this query.

Will return null if no rows were returned by the DB query.

Specified by:

singleValue in interface SelectQuery.ExecutionContext<E>

Returns:

the single matching value, or null if no match is found.

Throws:

IllegalStateException - if more than one row is found.

consumeWith

public <R> R consumeWith(@Nonnull
                         EntityListConsumer<E,R> consumer)

Description copied from interface: SelectQuery.ExecutionContext

Apply an EntityListConsumer to the returned results.

This is equivalent to calling SelectQuery.ExecutionContext.visitWith(Visitor), except that the entity list consumer can return a value.

Specified by:

consumeWith in interface SelectQuery.ExecutionContext<E>

Type Parameters:

R - the return value of the consumer

Parameters:

consumer - the entity list consumer that will consume the query results

Returns:

the result returned by the consumer's EntityListConsumer.result() method.

visitWith

public void visitWith(@Nonnull
                      Visitor<E> visitor)

Description copied from interface: SelectQuery.ExecutionContext

Visits each entity returned by the query.

This is equivalent to calling SelectQuery.ExecutionContext.consumeWith(EntityListConsumer) and ignoring the return value.

Specified by:

visitWith in interface SelectQuery.ExecutionContext<E>

Parameters:

visitor - the visitor to call with each entity that the query returns

count

public long count()

Description copied from interface: SelectQuery.ExecutionContext

Returns a count of matching items. Note that this does not go through the the entityName + "Count" pseudo-view stuff in the entity model, but rather generates a count function directly in the query that it executes, so you should be able to use it with arbitrary entities.

Specified by:

count in interface SelectQuery.ExecutionContext<E>

Returns:

count of matching items

toString

public String toString()

Overrides:

toString in class Object