Module io.helidon.dbclient.json

Package io.helidon.dbclient.json

Class JsonMapper

java.lang.Object

io.helidon.dbclient.json.JsonMapper

All Implemented Interfaces:

DbMapper<JsonObject>

public final class JsonMapper
extends Object
implements DbMapper<JsonObject>

Helidon JSON mapper.

Method Summary

Modifier and Type	Method	Description
static JsonMapper	create()	Create a new mapper that can map JsonObject to DB parameters and DbRow to a JsonObject.
JsonObject	read(DbRow row)	Read database row and convert it to target type instance.
List<Object>	toIndexedParameters(JsonObject value)	Convert target type instance to a statement indexed parameters list.
Map<String,Object>	toNamedParameters(JsonObject value)	Convert target type instance to a statement named parameters map.

Methods inherited from class java.lang.Object

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

Method Details

create

public static JsonMapper create()

Create a new mapper that can map JsonObject to DB parameters and DbRow to a JsonObject.

Returns:

a new mapper

read

public JsonObject read(DbRow row)

Description copied from interface: DbMapper

Read database row and convert it to target type instance.

Specified by:

read in interface DbMapper<JsonObject>

Parameters:

row - source database row

Returns:

target type instance containing database row

toNamedParameters

public Map<String,Object> toNamedParameters(JsonObject value)

Description copied from interface: DbMapper

Convert target type instance to a statement named parameters map.

Specified by:

toNamedParameters in interface DbMapper<JsonObject>

Parameters:

value - mapping type instance containing values to be set into statement

Returns:

map of statement named parameters mapped to values to be set

See Also:

• DbStatement.namedParam(Object)

toIndexedParameters

public List<Object> toIndexedParameters(JsonObject value)

Description copied from interface: DbMapper

Convert target type instance to a statement indexed parameters list.

Using indexed parameters with typed values is probably not going to work nicely, unless the order is specified and the number of parameters is always related the provided value. There are cases where this is useful though - e.g. for types that represent an iterable collection.

Specified by:

toIndexedParameters in interface DbMapper<JsonObject>

Parameters:

value - mapping type instance containing values to be set into statement

Returns:

map of statement named parameters mapped to values to be set

See Also:

• DbStatement.indexedParam(Object)