com.mysema.query.collections
Interface QueryEngine

All Known Implementing Classes:

DefaultQueryEngine

public interface QueryEngine

QueryEngine defines an interface for the evaluation of ColQuery queries

Author:

tiwe

Field Summary

static QueryEngine

DEFAULT Default instance

Method Summary

long	count(QueryMetadata metadata, Map<Expression<?>,Iterable<?>> iterables) Evaluate the given query and return the count of matched rows
boolean	exists(QueryMetadata metadata, Map<Expression<?>,Iterable<?>> iterables)
<T> List<T>	list(QueryMetadata metadata, Map<Expression<?>,Iterable<?>> iterables, Expression<T> projection) Evaluate the given query and return the projection as a list

Field Detail

DEFAULT

static final QueryEngine DEFAULT

Default instance

Method Detail

count

long count(QueryMetadata metadata,
           Map<Expression<?>,Iterable<?>> iterables)

Evaluate the given query and return the count of matched rows

Parameters:

metadata -

iterables -

Returns:

list

<T> List<T> list(QueryMetadata metadata,
                 Map<Expression<?>,Iterable<?>> iterables,
                 Expression<T> projection)

Evaluate the given query and return the projection as a list

Parameters:

metadata -

iterables -

Returns:

exists

boolean exists(QueryMetadata metadata,
               Map<Expression<?>,Iterable<?>> iterables)

Parameters:

metadata -

iterables -

Returns: