Package org.apache.druid.query.rowsandcols.column.accessor

Class ObjectColumnAccessorBase

java.lang.Object

org.apache.druid.query.rowsandcols.column.accessor.ObjectColumnAccessorBase

All Implemented Interfaces:

ColumnAccessor

Direct Known Subclasses:

NumericArrayFrameColumnReader.NumericArrayFrameColumn

public abstract class ObjectColumnAccessorBase
extends Object
implements ColumnAccessor

Constructor Summary

Constructors

Constructor	Description
ObjectColumnAccessorBase()

Method Summary

Modifier and Type	Method	Description
int	compareRows(int lhsRowNum, int rhsRowNum)	Compares two rows using a comparison that follows the same semantics as Comparator.compare(T, T)
protected abstract Comparator<Object>	getComparator()
double	getDouble(int rowNum)	Get the primitive double representation of the row.
float	getFloat(int rowNum)	Get the primitive float representation of the row.
int	getInt(int rowNum)	Get the primitive int representation of the row.
long	getLong(int rowNum)	Get the primitive long representation of the row.
Object	getObject(int rowNum)	Get the Object representation of the row.
protected abstract Object	getVal(int rowNum)
boolean	isNull(int rowNum)	Get whether the value of a row is null

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.druid.query.rowsandcols.column.ColumnAccessor

getType, numRows

Constructor Detail

ObjectColumnAccessorBase

public ObjectColumnAccessorBase()

Method Detail

isNull

public boolean isNull(int rowNum)

Description copied from interface: ColumnAccessor

Get whether the value of a row is null

Specified by:

isNull in interface ColumnAccessor

Parameters:

rowNum - the row id, 0-indexed

Returns:

true if the value is null

getObject

@Nullable
public Object getObject(int rowNum)

Description copied from interface: ColumnAccessor

Get the Object representation of the row.

Specified by:

getObject in interface ColumnAccessor

Parameters:

rowNum - the row id, 0-indexed

Returns:

the Object representation of the row. Returns null If ColumnAccessor.isNull(int) is true.

getDouble

public double getDouble(int rowNum)

Description copied from interface: ColumnAccessor

Get the primitive double representation of the row.

Specified by:

getDouble in interface ColumnAccessor

Parameters:

rowNum - the row id, 0-indexed

Returns:

the primitive double representation of the row. Returns 0D If ColumnAccessor.isNull(int) is true.

getFloat

public float getFloat(int rowNum)

Description copied from interface: ColumnAccessor

Get the primitive float representation of the row.

Specified by:

getFloat in interface ColumnAccessor

Parameters:

rowNum - the row id, 0-indexed

Returns:

the primitive float representation of the row. Returns 0F If ColumnAccessor.isNull(int) is true.

getLong

public long getLong(int rowNum)

Description copied from interface: ColumnAccessor

Get the primitive long representation of the row.

Specified by:

getLong in interface ColumnAccessor

Parameters:

rowNum - the row id, 0-indexed

Returns:

the primitive long representation of the row. Returns 0L If ColumnAccessor.isNull(int) is true.

getInt

public int getInt(int rowNum)

Description copied from interface: ColumnAccessor

Get the primitive int representation of the row.

Specified by:

getInt in interface ColumnAccessor

Parameters:

rowNum - the row id, 0-indexed

Returns:

the primitive int representation of the row. Returns 0 If ColumnAccessor.isNull(int) is true.

compareRows

public int compareRows(int lhsRowNum,
                       int rhsRowNum)

Description copied from interface: ColumnAccessor

Compares two rows using a comparison that follows the same semantics as Comparator.compare(T, T)

This is not comparing the row Ids, but the values referred to by the row ids.

Specified by:

compareRows in interface ColumnAccessor

Parameters:

lhsRowNum - the row id of the left-hand-side of the comparison

rhsRowNum - the row id of the right-hand-side of the comparison

Returns:

the result of the comparison of the two rows

getVal

protected abstract Object getVal(int rowNum)

getComparator

protected abstract Comparator<Object> getComparator()