Package com.qfs.chunk

Interface ITable

All Known Subinterfaces:

IAggregatesRetrievalResult, IAggregateStore, IByteRecordBlock, IChunkSet, IColumnarTable, IDatabaseRetrievalResult, IFixedLengthIntegerArrayDictionary, IIntegerArrayDictionary, IInternalAggregatesRetrievalResult, IIterableAggregatesRetrievalResult, IPointList, IRecordBlock<RecordT>, ITypedColumnarTable, IUnnamedColumnarTable, IWritableByteRecordBlock, IWritableIntegerArrayDictionary, IWritableRecordBlock<RecordT>, IWritableTable

All Known Implementing Classes:

AColumnStore, ADatabaseRetrievalResult, AFixedLengthIntegerArrayDictionary, AggregateStore, AppendOnlyByteRecordBlock, ARecordBlock, ArrowRecordBlock, AWritableFixedSizeRecordBlock, BucketedIntegerArrayDictionary, ChunkArray, ChunkSet, ChunkSetRecordBlock, ColumnarIntegerArrayDictionary, ColumnWrappingPointList, DatabaseRetrievalResult, DummyRecordBlock, EmptyAggregateStore, EmptyDatabaseRetrievalResult, ExpandedAggregatesRetrievalResult, FilteredAggregateStoreView, FilteredPointList, FilteredRecordBlock, FixedLengthIntegerArrayDictionary, IntegerArrayDictionary, IntegerArrayDictionaryWithHash, IntegerArrayList, IntegerArrayPermutationDictionary, MultiColumnarTableWrapper, OffsetRecordBlock, PointListRetrievalResult, PointReferenceDictionary, RecordBlock, RecordBlockMeasureStore, ReplicatedAggregateStore, SingleRowDelegateRecordBlock, SingleRowWritableRecordBlock, SparseChunkSet, TranslatedIntegerArrayDictionary

public interface ITable

Data elements organized in a table layout.

Depending of the storage implementation, it may be more efficient to read cells column by column or row by row.

Author:

ActiveViam

Method Summary

Modifier and Type	Method	Description
boolean	isNull(int row, int column)	Returns whether the value stored at the given row and column is null or not.
Object	read(int row, int column)	Reads the Object value stored in the table at the intersection of the given row and column.
boolean	readBoolean(int row, int column)	Reads the boolean primitive value stored in the table at the intersection of the given row and column.
double	readDouble(int row, int column)	Reads the double primitive value stored in the table at the intersection of the given row and column.
float	readFloat(int row, int column)	Reads the float primitive value stored in the table at the intersection of the given row and column.
int	readInt(int row, int column)	Reads the int primitive value stored in the table at the intersection of the given row and column.
long	readLong(int row, int column)	Reads the long primitive value stored in the table at the intersection of the given row and column.

Method Detail

isNull

boolean isNull(int row,
               int column)

Returns whether the value stored at the given row and column is null or not. Before reading primitive values, when it is not certain that the data is not null, this method must be called first to check nullity.

Parameters:

row - index of the row to check

column - index of the column to check

Returns:

true if the column value is null, false otherwise

read

Object read(int row,
            int column)

Reads the Object value stored in the table at the intersection of the given row and column.

Parameters:

row - index of the row to read

column - index of the column to read

Returns:

Object value

readBoolean

boolean readBoolean(int row,
                    int column)

Reads the boolean primitive value stored in the table at the intersection of the given row and column.

Parameters:

row - index of the row to read

column - index of the column to read

Returns:

boolean value

readInt

int readInt(int row,
            int column)

Reads the int primitive value stored in the table at the intersection of the given row and column.

Parameters:

row - index of the row to read

column - index of the column to read

Returns:

int value

readLong

long readLong(int row,
              int column)

Reads the long primitive value stored in the table at the intersection of the given row and column.

Parameters:

row - index of the row to read

column - index of the column to read

Returns:

long value

readDouble

double readDouble(int row,
                  int column)

Reads the double primitive value stored in the table at the intersection of the given row and column.

Parameters:

row - index of the row to read

column - index of the column to read

Returns:

double value

readFloat

float readFloat(int row,
                int column)

Reads the float primitive value stored in the table at the intersection of the given row and column.

Parameters:

row - index of the row to read

column - index of the column to read

Returns:

float value