org.apache.ignite.internal.processors.query

Interface GridQueryRowDescriptor

All Known Implementing Classes:

GridQueryRowDescriptorImpl

public interface GridQueryRowDescriptor

Row descriptor.

Method Summary

Modifier and Type	Method and Description
@Nullable GridCacheContext<?,?>	context() Gets cache context for this row descriptor.
int	fieldsCount()
int	getAlternativeColumnId(int colId) Gets alternative column id that may substitute the given column id.
Object	getFieldValue(Object key, Object val, int fieldIdx) Gets field value by field index.
Set<String>	getRowKeyColumnNames() Gets a copy of a set of table key column names.
boolean	isFieldKeyProperty(int fieldIdx) Determine whether a field corresponds to a property of key or to one of value.
boolean	isKeyColumn(int colId) Checks if provided column id matches key column or key alias.
boolean	isValueColumn(int colId) Checks if provided column id matches value column or alias.
void	onMetadataUpdated() Callback for table metadata update event.
void	setFieldValue(Object key, Object val, Object fieldVal, int fieldIdx) Sets field value by field index.
GridQueryTypeDescriptor	type() Gets type descriptor.

Method Detail

onMetadataUpdated

void onMetadataUpdated()

Callback for table metadata update event.

type

GridQueryTypeDescriptor type()

Gets type descriptor.

Returns:

Type descriptor.

context

@Nullable
@Nullable GridCacheContext<?,?> context()

Gets cache context for this row descriptor.

Returns:

Cache context.

fieldsCount

int fieldsCount()

Returns:

Total fields count.

getFieldValue

Object getFieldValue(Object key,
                     Object val,
                     int fieldIdx)

Gets field value by field index.

Parameters:

key - Key.

val - Value.

fieldIdx - Field index.

Returns:

Field value.

setFieldValue

void setFieldValue(Object key,
                   Object val,
                   Object fieldVal,
                   int fieldIdx)

Sets field value by field index.

Parameters:

key - Key.

val - Value.

fieldVal - Value to set to field.

fieldIdx - Field index.

isFieldKeyProperty

boolean isFieldKeyProperty(int fieldIdx)

Determine whether a field corresponds to a property of key or to one of value.

Parameters:

fieldIdx - Field index.

Returns:

true if given field corresponds to a key property, false otherwise.

isKeyColumn

boolean isKeyColumn(int colId)

Checks if provided column id matches key column or key alias.

Parameters:

colId - Column id.

Returns:

Result.

isValueColumn

boolean isValueColumn(int colId)

Checks if provided column id matches value column or alias.

Parameters:

colId - Column id.

Returns:

Result.

getAlternativeColumnId

int getAlternativeColumnId(int colId)

Gets alternative column id that may substitute the given column id. For alias column returns original one. For original column returns its alias. Otherwise, returns the given column id.

Parameters:

colId - Column id.

Returns:

Result.

getRowKeyColumnNames

Set<String> getRowKeyColumnNames()

Gets a copy of a set of table key column names.

Returns:

Set of a table key column names.