Package org.apache.ignite.internal.processors.query

Class GridQueryRowDescriptorImpl

java.lang.Object

org.apache.ignite.internal.processors.query.GridQueryRowDescriptorImpl

All Implemented Interfaces:

GridQueryRowDescriptor

public class GridQueryRowDescriptorImpl
extends Object
implements GridQueryRowDescriptor

Row descriptor.

Field Summary

Fields

Modifier and Type	Field	Description
static int	COL_NOT_EXISTS	Non existent column.

Constructor Summary

Constructors

Constructor	Description
GridQueryRowDescriptorImpl(GridCacheContextInfo<?,?> cacheInfo, GridQueryTypeDescriptor type)	Constructor.

Method Summary

Modifier and Type	Method	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.

Methods inherited from class java.lang.Object

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

Field Detail

COL_NOT_EXISTS

public static final int COL_NOT_EXISTS

Non existent column.

See Also:

Constant Field Values

Constructor Detail

GridQueryRowDescriptorImpl

public GridQueryRowDescriptorImpl(GridCacheContextInfo<?,?> cacheInfo,
                                  GridQueryTypeDescriptor type)

Constructor.

Parameters:

cacheInfo - Cache context.

type - Type descriptor.

Method Detail

onMetadataUpdated

public final void onMetadataUpdated()

Callback for table metadata update event.

Specified by:

onMetadataUpdated in interface GridQueryRowDescriptor

type

public GridQueryTypeDescriptor type()

Gets type descriptor.

Specified by:

type in interface GridQueryRowDescriptor

Returns:

Type descriptor.

context

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

Gets cache context for this row descriptor.

Specified by:

context in interface GridQueryRowDescriptor

Returns:

Cache context.

fieldsCount

public int fieldsCount()

Specified by:

fieldsCount in interface GridQueryRowDescriptor

Returns:

Total fields count.

getFieldValue

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

Gets field value by field index.

Specified by:

getFieldValue in interface GridQueryRowDescriptor

Parameters:

key - Key.

val - Value.

fieldIdx - Field index.

Returns:

Field value.

setFieldValue

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

Sets field value by field index.

Specified by:

setFieldValue in interface GridQueryRowDescriptor

Parameters:

key - Key.

val - Value.

fieldVal - Value to set to field.

fieldIdx - Field index.

isFieldKeyProperty

public boolean isFieldKeyProperty(int fieldIdx)

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

Specified by:

isFieldKeyProperty in interface GridQueryRowDescriptor

Parameters:

fieldIdx - Field index.

Returns:

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

isKeyColumn

public boolean isKeyColumn(int colId)

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

Specified by:

isKeyColumn in interface GridQueryRowDescriptor

Parameters:

colId - Column id.

Returns:

Result.

isValueColumn

public boolean isValueColumn(int colId)

Checks if provided column id matches value column or alias.

Specified by:

isValueColumn in interface GridQueryRowDescriptor

Parameters:

colId - Column id.

Returns:

Result.

getAlternativeColumnId

public 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.

Specified by:

getAlternativeColumnId in interface GridQueryRowDescriptor

Parameters:

colId - Column id.

Returns:

Result.

getRowKeyColumnNames

public Set<String> getRowKeyColumnNames()

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

Specified by:

getRowKeyColumnNames in interface GridQueryRowDescriptor

Returns:

Set of a table key column names.