Package org.springframework.data.r2dbc.query

Class QueryMapper

java.lang.Object

org.springframework.data.r2dbc.query.QueryMapper

Direct Known Subclasses:

UpdateMapper

public class QueryMapper
extends Object

Maps CriteriaDefinition and Sort objects considering mapping metadata and dialect-specific conversion.

Author:

Mark Paluch, Roman Chigvintsev, Manousos Mathioudakis, Jens Schauder, Yan Qiang

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(R2dbcDialect dialect, R2dbcConverter converter)	Creates a new QueryMapper with the given R2dbcConverter.

Method Summary

Modifier and Type	Method	Description
protected Object	convertValue(Object value, TypeInformation<?> typeInformation)
Parameter	getBindValue(Parameter value)	Potentially convert the Parameter.
Expression	getMappedObject(Expression expression, RelationalPersistentEntity<?> entity)	Map the Expression object to apply field name mapping using the type to read.
BoundCondition	getMappedObject(BindMarkers markers, CriteriaDefinition criteria, Table table, RelationalPersistentEntity<?> entity)	Map a CriteriaDefinition object into Condition and consider value/NULL Bindings.
List<OrderByField>	getMappedSort(Table table, Sort sort, RelationalPersistentEntity<?> entity)	Map the Sort object to apply field name mapping using the type to read.
protected MappingContext<? extends RelationalPersistentEntity<?>,RelationalPersistentProperty>	getMappingContext()
String	toSql(SqlIdentifier identifier)	Render a SqlIdentifier for SQL usage.

Methods inherited from class java.lang.Object

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

Constructor Details

QueryMapper

public QueryMapper(R2dbcDialect dialect,
 R2dbcConverter converter)

Creates a new QueryMapper with the given R2dbcConverter.

Parameters:

dialect -

converter - must not be null.

Method Details

toSql

public String toSql(SqlIdentifier identifier)

Render a SqlIdentifier for SQL usage. The resulting String might contain quoting characters.

Parameters:

identifier - the identifier to be rendered.

Returns:

an identifier String.

Since:

1.1

getMappedSort

public List<OrderByField> getMappedSort(Table table,
 Sort sort,
 @Nullable
 RelationalPersistentEntity<?> entity)

Map the Sort object to apply field name mapping using the type to read.

Parameters:

sort - must not be null.

entity - related RelationalPersistentEntity, can be null.

Returns:

Since:

1.1

getMappedObject

public Expression getMappedObject(Expression expression,
 @Nullable
 RelationalPersistentEntity<?> entity)

Map the Expression object to apply field name mapping using the type to read.

Parameters:

expression - must not be null.

entity - related RelationalPersistentEntity, can be null.

Returns:

the mapped Expression.

Since:

1.1

getMappedObject

public BoundCondition getMappedObject(BindMarkers markers,
 CriteriaDefinition criteria,
 Table table,
 @Nullable
 RelationalPersistentEntity<?> entity)

Map a CriteriaDefinition object into Condition and consider value/NULL Bindings.

Parameters:

markers - bind markers object, must not be null.

criteria - criteria definition to map, must not be null.

table - must not be null.

entity - related RelationalPersistentEntity, can be null.

Returns:

the mapped BoundCondition.

Since:

1.1

getBindValue

public Parameter getBindValue(Parameter value)

Potentially convert the Parameter.

Parameters:

value -

Returns:

Since:

1.2

convertValue

@Nullable
protected Object convertValue(@Nullable
 Object value,
 TypeInformation<?> typeInformation)

getMappingContext

protected MappingContext<? extends RelationalPersistentEntity<?>,RelationalPersistentProperty> getMappingContext()