Package com.illumon.iris.db.v2.utils

Class ColumnHolder

java.lang.Object

com.illumon.iris.db.v2.utils.ColumnHolder

public class ColumnHolder
extends Object

Data to construct a data column.

Field Summary

Fields

Modifier and Type	Field	Description
Object	data
boolean	grouped
String	name
Class	type
static ColumnHolder[]	ZERO_LENGTH_COLUMN_HOLDER_ARRAY

Constructor Summary

Constructors

Constructor	Description
ColumnHolder(String name, boolean grouped, byte... data)	Construct a new set of column data.
ColumnHolder(String name, boolean grouped, char... data)	Construct a new set of column data.
ColumnHolder(String name, boolean grouped, double... data)	Construct a new set of column data.
ColumnHolder(String name, boolean grouped, float... data)	Construct a new set of column data.
ColumnHolder(String name, boolean grouped, int... data)	Construct a new set of column data.
ColumnHolder(String name, boolean grouped, long... data)	Construct a new set of column data.
ColumnHolder(String name, boolean grouped, short... data)	Construct a new set of column data.
ColumnHolder(String name, boolean grouped, T... data)	Construct a new set of column data.
ColumnHolder(String name, Class<T> clazz, T... data)	Construct a new set of column data.

Method Summary

Modifier and Type	Method	Description
static ColumnHolder	getBooleanColumnHolder(String name, boolean grouped, byte... data)	Create a column holder for a Boolean column where the calues are represented as bytes.
static ColumnHolder	getColumnHolderFromArray(String name, boolean grouped, Object data)	Create a column holder from an array object, inferring the data type from the given array object.
ColumnSource	getColumnSource()	Gets a column source for the data.
static ColumnHolder	getDateTimeColumnHolder(String name, boolean grouped, long... data)	Create a column holder for a DateTime column where the values are represented as longs.

Methods inherited from class java.lang.Object

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

Field Details

ZERO_LENGTH_COLUMN_HOLDER_ARRAY

public static final ColumnHolder[] ZERO_LENGTH_COLUMN_HOLDER_ARRAY

name

public final String name

type

public final Class type

data

public final Object data

grouped

public final boolean grouped

Constructor Details

ColumnHolder

public ColumnHolder(String name, boolean grouped, T... data)

Construct a new set of column data.

Type Parameters:

T - column element type

Parameters:

name - column name

grouped - true if the column is grouped; false otherwise

data - column data

ColumnHolder

public ColumnHolder(String name, Class<T> clazz, T... data)

Construct a new set of column data.

Type Parameters:

T - column element type

Parameters:

name - column name

data - column data

ColumnHolder

public ColumnHolder(String name, boolean grouped, long... data)

Construct a new set of column data.

Parameters:

name - column name

grouped - true if the column is grouped; false otherwise

data - column data

ColumnHolder

public ColumnHolder(String name, boolean grouped, int... data)

Construct a new set of column data.

Parameters:

name - column name

grouped - true if the column is grouped; false otherwise

data - column data

ColumnHolder

public ColumnHolder(String name, boolean grouped, short... data)

Construct a new set of column data.

Parameters:

name - column name

grouped - true if the column is grouped; false otherwise

data - column data

ColumnHolder

public ColumnHolder(String name, boolean grouped, char... data)

Construct a new set of column data.

Parameters:

name - column name

grouped - true if the column is grouped; false otherwise

data - column data

ColumnHolder

public ColumnHolder(String name, boolean grouped, byte... data)

Construct a new set of column data.

Parameters:

name - column name

grouped - true if the column is grouped; false otherwise

data - column data

ColumnHolder

public ColumnHolder(String name, boolean grouped, double... data)

Construct a new set of column data.

Parameters:

name - column name

grouped - true if the column is grouped; false otherwise

data - column data

ColumnHolder

public ColumnHolder(String name, boolean grouped, float... data)

Construct a new set of column data.

Parameters:

name - column name

grouped - true if the column is grouped; false otherwise

data - column data

Method Details

getDateTimeColumnHolder

public static ColumnHolder getDateTimeColumnHolder(String name, boolean grouped, long... data)

Create a column holder for a DateTime column where the values are represented as longs. Whatever process produces a table from this column holder should respect this and create the appropriate type of ColumnSource. Under normal conditions, this will be a DateTimeArraySource (see getColumnSource()).

Parameters:

name - column name

grouped - true if the column is grouped; false otherwise

data - column data (long integers representing nanos since the epoch)

Returns:

a DBDateTime column holder implemented with longs for storage

getBooleanColumnHolder

public static ColumnHolder getBooleanColumnHolder(String name, boolean grouped, byte... data)

Create a column holder for a Boolean column where the calues are represented as bytes. The given byte array will be converted to a Boolean array.

Parameters:

name - column name

grouped - true if the column is grouped; false otherwise

data - column data (byte values where 1 represents true, 0 represents false, and null otherwise)

Returns:

a Boolean column holder

getColumnHolderFromArray

public static ColumnHolder getColumnHolderFromArray(String name, boolean grouped, Object data)

Create a column holder from an array object, inferring the data type from the given array object.

Parameters:

name - column name

grouped - true if the column is grouped; false otherwise

data - an object holding the column data (must be an array)

Returns:

a column holder with a type matching the component type of the provided array

getColumnSource

public ColumnSource getColumnSource()

Gets a column source for the data. Other than the special case of DBDateTime columns, this requires that the type specified match the component type of the actual data.

Returns:

column source constructed with data from this column holder