io.micronaut.data.runtime.mapper

Interface ResultReader<RS,IDX>

Type Parameters:

RS - The result set

IDX - The index type

All Known Implementing Classes:

ColumnIndexResultSetReader, ColumnNameResultSetReader

public interface ResultReader<RS,IDX>

A result reader is a type that is capable of reading data from the given result set type.

Method Summary

Modifier and Type	Method and Description
default <T> T	convertRequired(java.lang.Object value, io.micronaut.core.type.Argument<T> type) Convert the value to the given type.
default <T> T	convertRequired(java.lang.Object value, java.lang.Class<T> type) Convert the value to the given type.
<T> T	getRequiredValue(RS resultSet, IDX name, java.lang.Class<T> type) Get a value from the given result set for the given name and type.
boolean	next(RS resultSet) Move the index to the next result if possible.
default java.math.BigDecimal	readBigDecimal(RS resultSet, IDX name) Read a BigDecimal value for the given name.
default boolean	readBoolean(RS resultSet, IDX name) Read a boolean value for the given name.
default byte	readByte(RS resultSet, IDX name) Read a byte value for the given name.
default byte[]	readBytes(RS resultSet, IDX name) Read a byte[] value for the given name.
default char	readChar(RS resultSet, IDX name) Read a char value for the given name.
default java.util.Date	readDate(RS resultSet, IDX name) Read a date value for the given name.
default double	readDouble(RS resultSet, IDX name) Read a double value for the given name.
default java.lang.Object	readDynamic(RS resultSet, IDX index, DataType dataType) Read a value dynamically using the result set and the given name and data type.
default float	readFloat(RS resultSet, IDX name) Read a float value for the given name.
default int	readInt(RS resultSet, IDX name) Read a int value for the given name.
default long	readLong(RS resultSet, IDX name) Read a long value for the given name.
default short	readShort(RS resultSet, IDX name) Read a short value for the given name.
default java.lang.String	readString(RS resultSet, IDX name) Read a string value for the given name.
default java.util.Date	readTimestamp(RS resultSet, IDX index) Read a timestamp value for the given index.

Method Detail

convertRequired

default <T> T convertRequired(@NonNull
                              java.lang.Object value,
                              java.lang.Class<T> type)

Convert the value to the given type.

Type Parameters:

T - The generic type

Parameters:

value - The value

type - The type

Returns:

The converted value

Throws:

DataAccessException - if the value cannot be converted

convertRequired

default <T> T convertRequired(@NonNull
                              java.lang.Object value,
                              io.micronaut.core.type.Argument<T> type)

Convert the value to the given type.

Type Parameters:

T - The generic type

Parameters:

value - The value

type - The type

Returns:

The converted value

Throws:

DataAccessException - if the value cannot be converted

getRequiredValue

@Nullable
<T> T getRequiredValue(RS resultSet,
                                 IDX name,
                                 java.lang.Class<T> type)
                          throws DataAccessException

Get a value from the given result set for the given name and type.

Type Parameters:

T - The generic type

Parameters:

resultSet - The result set

name - The name

type - The type

Returns:

The value

Throws:

DataAccessException - if the value cannot be read

next

boolean next(RS resultSet)

Move the index to the next result if possible.

Parameters:

resultSet - The result set

Returns:

The next result

readDynamic

@Nullable
default java.lang.Object readDynamic(@NonNull
                                               RS resultSet,
                                               @NonNull
                                               IDX index,
                                               @NonNull
                                               DataType dataType)

Read a value dynamically using the result set and the given name and data type.

Parameters:

resultSet - The result set

index - The name

dataType - The data type

Returns:

The value, can be null

Throws:

DataAccessException - if the value cannot be read

readLong

default long readLong(RS resultSet,
                      IDX name)

Read a long value for the given name.

Parameters:

resultSet - The result set

name - The name (such as the column name)

Returns:

The long value

readChar

default char readChar(RS resultSet,
                      IDX name)

Read a char value for the given name.

Parameters:

resultSet - The result set

name - The name (such as the column name)

Returns:

The char value

readDate

default java.util.Date readDate(RS resultSet,
                                IDX name)

Read a date value for the given name.

Parameters:

resultSet - The result set

name - The name (such as the column name)

Returns:

The char value

readTimestamp

default java.util.Date readTimestamp(RS resultSet,
                                     IDX index)

Read a timestamp value for the given index.

Parameters:

resultSet - The result set

index - The index (such as the column name)

Returns:

The char value

readString

@Nullable
default java.lang.String readString(RS resultSet,
                                              IDX name)

Read a string value for the given name.

Parameters:

resultSet - The result set

name - The name (such as the column name)

Returns:

The string value

readInt

default int readInt(RS resultSet,
                    IDX name)

Read a int value for the given name.

Parameters:

resultSet - The result set

name - The name (such as the column name)

Returns:

The int value

readBoolean

default boolean readBoolean(RS resultSet,
                            IDX name)

Read a boolean value for the given name.

Parameters:

resultSet - The result set

name - The name (such as the column name)

Returns:

The boolean value

readFloat

default float readFloat(RS resultSet,
                        IDX name)

Read a float value for the given name.

Parameters:

resultSet - The result set

name - The name (such as the column name)

Returns:

The float value

readByte

default byte readByte(RS resultSet,
                      IDX name)

Read a byte value for the given name.

Parameters:

resultSet - The result set

name - The name (such as the column name)

Returns:

The byte value

readShort

default short readShort(RS resultSet,
                        IDX name)

Read a short value for the given name.

Parameters:

resultSet - The result set

name - The name (such as the column name)

Returns:

The short value

readDouble

default double readDouble(RS resultSet,
                          IDX name)

Read a double value for the given name.

Parameters:

resultSet - The result set

name - The name (such as the column name)

Returns:

The double value

readBigDecimal

default java.math.BigDecimal readBigDecimal(RS resultSet,
                                            IDX name)

Read a BigDecimal value for the given name.

Parameters:

resultSet - The result set

name - The name (such as the column name)

Returns:

The BigDecimal value

readBytes

default byte[] readBytes(RS resultSet,
                         IDX name)

Read a byte[] value for the given name.

Parameters:

resultSet - The result set

name - The name (such as the column name)

Returns:

The byte[] value