Package org.springframework.data.keyvalue.core

Class QueryEngine<ADAPTER extends KeyValueAdapter,CRITERIA,SORT>

java.lang.Object

org.springframework.data.keyvalue.core.QueryEngine<ADAPTER,CRITERIA,SORT>

Type Parameters:

ADAPTER -

CRITERIA -

SORT -

public abstract class QueryEngine<ADAPTER extends KeyValueAdapter,CRITERIA,SORT>
extends Object

Base implementation for accessing and executing KeyValueQuery against a KeyValueAdapter.

Author:

Christoph Strobl, Mark Paluch

Constructor Summary

Constructors

Constructor	Description
QueryEngine(CriteriaAccessor<CRITERIA> criteriaAccessor, SortAccessor<SORT> sortAccessor)

Method Summary

Modifier and Type	Method	Description
abstract long	count(CRITERIA criteria, String keyspace)
long	count(KeyValueQuery<?> query, String keyspace)	Extract query attributes and delegate to concrete execution.
abstract Collection<?>	execute(CRITERIA criteria, SORT sort, long offset, int rows, String keyspace)
<T> Collection<T>	execute(CRITERIA criteria, SORT sort, long offset, int rows, String keyspace, Class<T> type)
Collection<?>	execute(KeyValueQuery<?> query, String keyspace)	Extract query attributes and delegate to concrete execution.
<T> Collection<T>	execute(KeyValueQuery<?> query, String keyspace, Class<T> type)	Extract query attributes and delegate to concrete execution.
protected ADAPTER	getAdapter()	Get the KeyValueAdapter used.
protected ADAPTER	getRequiredAdapter()	Get the required KeyValueAdapter used or throw IllegalStateException if the adapter is not set.
void	registerAdapter(KeyValueAdapter adapter)

Methods inherited from class java.lang.Object

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

Constructor Details

QueryEngine

public QueryEngine(@Nullable
 CriteriaAccessor<CRITERIA> criteriaAccessor,
 @Nullable
 SortAccessor<SORT> sortAccessor)

Method Details

execute

public Collection<?> execute(KeyValueQuery<?> query,
 String keyspace)

Extract query attributes and delegate to concrete execution.

Parameters:

query -

keyspace -

Returns:

execute

public <T> Collection<T> execute(KeyValueQuery<?> query,
 String keyspace,
 Class<T> type)

Extract query attributes and delegate to concrete execution.

Parameters:

query -

keyspace -

Returns:

count

public long count(KeyValueQuery<?> query,
 String keyspace)

Extract query attributes and delegate to concrete execution.

Parameters:

query -

keyspace -

Returns:

execute

public abstract Collection<?> execute(@Nullable
 CRITERIA criteria,
 @Nullable
 SORT sort,
 long offset,
 int rows,
 String keyspace)

Parameters:

criteria -

sort -

offset -

rows -

keyspace -

Returns:

execute

public <T> Collection<T> execute(@Nullable
 CRITERIA criteria,
 @Nullable
 SORT sort,
 long offset,
 int rows,
 String keyspace,
 Class<T> type)

Parameters:

criteria -

sort -

offset -

rows -

keyspace -

type -

Returns:

Since:

1.1

count

public abstract long count(@Nullable
 CRITERIA criteria,
 String keyspace)

Parameters:

criteria -

keyspace -

Returns:

getAdapter

@Nullable
protected ADAPTER getAdapter()

Get the KeyValueAdapter used.

Returns:

getRequiredAdapter

protected ADAPTER getRequiredAdapter()

Get the required KeyValueAdapter used or throw IllegalStateException if the adapter is not set.

Returns:

the required KeyValueAdapter.

Throws:

IllegalStateException - if the adapter is not set.

registerAdapter

public void registerAdapter(KeyValueAdapter adapter)

Parameters:

adapter -