ra.db.record

Interface RecordCursor

All Superinterfaces:

java.lang.AutoCloseable, java.io.Closeable

All Known Subinterfaces:

Record

All Known Implementing Classes:

RecordSet

public interface RecordCursor
extends java.io.Closeable

The result of query when executes SQL statement via statement executor.

Author:

Ray Li

Method Summary

Modifier and Type	Method and Description
void	end() Last record.
java.lang.String	field(int index) Get value of specific fields.
java.lang.String	field(java.lang.String name) Use field name returns a value.
<T> java.util.List<T>	fieldArray(java.lang.String name, java.lang.Class<T[]> castClass) Get value by specified field name.
java.math.BigDecimal	fieldBigDecimal(java.lang.String name) Get value by specified field name.
byte[]	fieldBytes(java.lang.String name) Get value by specified field name.
double	fieldDouble(java.lang.String name) Get value by specified field name.
float	fieldFloat(java.lang.String name) Get value by specified field name.
int	fieldInt(java.lang.String name) Get value by specified field name.
long	fieldLong(java.lang.String name) Get value by specified field name.
void	fieldNames(java.util.function.Consumer<java.lang.String> action) Get name of table fields.
java.lang.Object	fieldObject(java.lang.String name) Get value by specified field name.
void	first() First record.
void	forEach(java.util.function.Consumer<RowSet> action) Get each row data from the record.
int	getFieldCount() Get count of table fields.
int	getRecordCount() Get count of record.
boolean	isBof() Verify whether first record.
boolean	isEof() Verify whether end of the record.
boolean	isNull(java.lang.String name) If the query database specifies a field name and its value is null, it will return null.
void	move(int index) Move to index.
void	next() Next row.
java.util.stream.Stream<RowSet>	parallelStream() Returns parallel stream of the number of data after the query is completed.
void	previous() Previous row.
java.util.stream.Stream<RowSet>	stream() Returns ordered stream of the number of data after the query is completed.

Methods inherited from interface java.io.Closeable

close

Method Detail

getFieldCount

int getFieldCount()

Get count of table fields.

Returns:

field count

isNull

boolean isNull(java.lang.String name)

If the query database specifies a field name and its value is null, it will return null.

Parameters:

name - Field name

Returns:

boolean

fieldNames

void fieldNames(java.util.function.Consumer<java.lang.String> action)

Get name of table fields.

Parameters:

action - Consumer

field

java.lang.String field(int index)

Get value of specific fields.

Parameters:

index - An index returns a value of position.

Returns:

value

field

java.lang.String field(java.lang.String name)

Use field name returns a value.

Parameters:

name - Field name

Returns:

value

fieldBytes

byte[] fieldBytes(java.lang.String name)

Get value by specified field name. If field value is null will return null.

Parameters:

name - Field name

Returns:

bytes

fieldLong

long fieldLong(java.lang.String name)

Get value by specified field name. If field value is null will return null.

Parameters:

name - Field name

Returns:

bytes

fieldInt

int fieldInt(java.lang.String name)

Get value by specified field name. If field value is null will return null.

Parameters:

name - Field name

Returns:

bytes

fieldFloat

float fieldFloat(java.lang.String name)

Get value by specified field name. If field value is null will return null.

Parameters:

name - Field name

Returns:

bytes

fieldDouble

double fieldDouble(java.lang.String name)

Get value by specified field name. If field value is null will return null.

Parameters:

name - Field name

Returns:

bytes

fieldBigDecimal

java.math.BigDecimal fieldBigDecimal(java.lang.String name)

Get value by specified field name. If field value is null will return null.

Parameters:

name - Field name

Returns:

bytes

fieldArray

<T> java.util.List<T> fieldArray(java.lang.String name,
                                 java.lang.Class<T[]> castClass)

Get value by specified field name. If field value is null will return null.

Type Parameters:

T - list element

Parameters:

name - Field name

castClass - Cast class

Returns:

List

fieldObject

java.lang.Object fieldObject(java.lang.String name)

Get value by specified field name. If field value is null will return null.

Parameters:

name - Field name

Returns:

Object

next

void next()

Next row.

previous

void previous()

Previous row.

move

void move(int index)

Move to index.

Parameters:

index - index

first

void first()

First record.

end

void end()

Last record.

isBof

boolean isBof()

Verify whether first record.

Returns:

If first row returns true.

isEof

boolean isEof()

Verify whether end of the record.

Returns:

If last row returns true.

getRecordCount

int getRecordCount()

Get count of record.

Returns:

count of record

forEach

void forEach(java.util.function.Consumer<RowSet> action)

Get each row data from the record.

Parameters:

action - Row of record

stream

java.util.stream.Stream<RowSet> stream()

Returns ordered stream of the number of data after the query is completed.

Returns:

Stream

parallelStream

java.util.stream.Stream<RowSet> parallelStream()

Returns parallel stream of the number of data after the query is completed.

Returns:

Stream