de.unknownreality.dataframe.common.header

Class BasicTypeHeader<T>

java.lang.Object

de.unknownreality.dataframe.common.header.BasicTypeHeader<T>

All Implemented Interfaces:

Header<T>, Iterable<T>

Direct Known Subclasses:

DataFrameHeader

public abstract class BasicTypeHeader<T>
extends Object
implements Header<T>

Created by Alex on 09.03.2016.

Constructor Summary

Constructors

Constructor and Description
BasicTypeHeader()

Method Summary

Modifier and Type	Method and Description
BasicTypeHeader	add(T name, Class<? extends DataFrameColumn> colClass, Class<? extends Comparable> type) Adds a new header entry based on column name, column class and column value type.
BasicTypeHeader	add(T headerName, DataFrameColumn<?,?> column) Adds a new data frame column to this header
void	clear() Clears this header
boolean	contains(T name) Returns true if the header contains a column with the input name
abstract BasicTypeHeader	copy() Creates a copy of this header.
boolean	equals(Object other) Returns true if the other header is compatible with this header.
T	get(int index) Returns the column header name at a specific index.
Class<? extends DataFrameColumn>	getColumnType(int index) Returns the column class for a column index
Class<? extends DataFrameColumn>	getColumnType(T name) Returns the column class for an input column name
int	getIndex(T name) Returns the column index of a specific column name.
Class<? extends Comparable>	getType(int index) Returns the column value type for a column index
Class<? extends Comparable>	getType(T name) Returns the column value type for an input column name
Iterator<T>	iterator() Returns an iterator over the column names in this header.
void	remove(T name) Removes a column from this header
void	rename(T oldName, T newName) Renames a column
int	size() Returns the number of entries(columns) in this header
String	toString() Returns a string representation of this header

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Detail

BasicTypeHeader

public BasicTypeHeader()

Method Detail

size

public int size()

Description copied from interface: Header

Returns the number of entries(columns) in this header

Specified by:

size in interface Header<T>

Returns:

number of entries

add

public BasicTypeHeader add(T headerName,
                           DataFrameColumn<?,?> column)

Adds a new data frame column to this header

Parameters:

column - new data frame column

Returns:

self for method chaining

add

public BasicTypeHeader add(T name,
                           Class<? extends DataFrameColumn> colClass,
                           Class<? extends Comparable> type)

Adds a new header entry based on column name, column class and column value type.

Parameters:

name - column name

colClass - column class

type - column value type

Returns:

self for method chaining

remove

public void remove(T name)

Removes a column from this header

Parameters:

name - column name

rename

public void rename(T oldName,
                   T newName)

Renames a column

Parameters:

oldName - old name

newName - new name

equals

public boolean equals(Object other)

Returns true if the other header is compatible with this header. Compatible means that both headers contain the same columns with the same column classes.

Overrides:

equals in class Object

Parameters:

other - object to test for compatibility

Returns:

true if the object is equal or compatible with this header

getColumnType

public Class<? extends DataFrameColumn> getColumnType(T name)

Returns the column class for an input column name

Parameters:

name - input column name

Returns:

column class

getColumnType

public Class<? extends DataFrameColumn> getColumnType(int index)

Returns the column class for a column index

Parameters:

index - column index

Returns:

column class

getType

public Class<? extends Comparable> getType(T name)

Returns the column value type for an input column name

Parameters:

name - input column name

Returns:

column value type

getType

public Class<? extends Comparable> getType(int index)

Returns the column value type for a column index

Parameters:

index - column index

Returns:

column value type

get

public T get(int index)

Returns the column header name at a specific index. Throws an DataFrameRuntimeException if the index is out of bounds.

Specified by:

get in interface Header<T>

Parameters:

index - index of column

Returns:

column name at index

contains

public boolean contains(T name)

Returns true if the header contains a column with the input name

Specified by:

contains in interface Header<T>

Parameters:

name - input name

Returns:

true if header contains input name

clear

public void clear()

Clears this header

getIndex

public int getIndex(T name)

Returns the column index of a specific column name. throws an DataFrameRuntimeException if the column header name is not found

Specified by:

getIndex in interface Header<T>

Parameters:

name - searched column name

Returns:

column index

copy

public abstract BasicTypeHeader copy()

Creates a copy of this header.

Returns:

copy of header

toString

public String toString()

Returns a string representation of this header

Overrides:

toString in class Object

Returns:

string representation

iterator

public Iterator<T> iterator()

Returns an iterator over the column names in this header. Iterator.remove() is not supported

Specified by:

iterator in interface Iterable<T>

Returns:

column name iterator