Package org.springframework.data.cassandra.core.convert

Class QueryMapper

java.lang.Object

org.springframework.data.cassandra.core.convert.QueryMapper

Direct Known Subclasses:

UpdateMapper

public class QueryMapper
extends Object

Map Query to CQL-specific data types.

Since:

2.0

Author:

Mark Paluch, Christoph Strobl

See Also:

• ColumnName
• Columns
• Criteria
• Filter
• Sort

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static class	QueryMapper.Field	Value object to represent a field and its meta-information.
protected static class	QueryMapper.MetadataBackedField	Extension of QueryMapper.Field to be backed with mapping metadata.

Constructor Summary

Constructors

Constructor	Description
QueryMapper(CassandraConverter converter)	Creates a new QueryMapper with the given CassandraConverter.

Method Summary

Modifier and Type	Method	Description
CassandraConverter	getConverter()	Returns the configured CassandraConverter used to convert object values into Cassandra column typed values.
List<com.datastax.oss.driver.api.core.CqlIdentifier>	getMappedColumnNames(Columns columns, CassandraPersistentEntity<?> entity)	Map Columns with a type hint to column names for included columns.
Filter	getMappedObject(Filter filter, CassandraPersistentEntity<?> entity)	Map a Filter with a type hint.
List<Columns.Selector>	getMappedSelectors(Columns columns, CassandraPersistentEntity<?> entity)	Map Columns with a type hint to Columns.ColumnSelectors.
Sort	getMappedSort(Sort sort, CassandraPersistentEntity<?> entity)
protected CassandraMappingContext	getMappingContext()	Returns the configured MappingContext containing mapping meta-data (persistent entities and properties) used to store (map) objects to Cassandra tables (rows/columns).

Methods inherited from class java.lang.Object

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

Constructor Details

QueryMapper

public QueryMapper(CassandraConverter converter)

Creates a new QueryMapper with the given CassandraConverter.

Parameters:

converter - must not be null.

Method Details

getConverter

public CassandraConverter getConverter()

Returns the configured CassandraConverter used to convert object values into Cassandra column typed values.

Returns:

the configured CassandraConverter.

See Also:

• CassandraConverter

getMappingContext

protected CassandraMappingContext getMappingContext()

Returns the configured MappingContext containing mapping meta-data (persistent entities and properties) used to store (map) objects to Cassandra tables (rows/columns).

Returns:

the configured MappingContext.

getMappedObject

public Filter getMappedObject(Filter filter,
 CassandraPersistentEntity<?> entity)

Map a Filter with a type hint. Filter mapping translates property names to column names and maps CriteriaDefinition.Predicate values to simple Cassandra values.

Parameters:

filter - must not be null.

entity - must not be null.

Returns:

the mapped Filter.

getMappedSelectors

public List<Columns.Selector> getMappedSelectors(Columns columns,
 CassandraPersistentEntity<?> entity)

Map Columns with a type hint to Columns.ColumnSelectors.

Parameters:

columns - must not be null.

entity - must not be null.

Returns:

the mapped Columns.Selectors.

getMappedColumnNames

public List<com.datastax.oss.driver.api.core.CqlIdentifier> getMappedColumnNames(Columns columns,
 CassandraPersistentEntity<?> entity)

Map Columns with a type hint to column names for included columns. Function call selectors or other Columns.Selector types are not included.

Parameters:

columns - must not be null.

entity - must not be null.

Returns:

the mapped column names.

getMappedSort

public Sort getMappedSort(Sort sort,
 CassandraPersistentEntity<?> entity)