de.unknownreality.dataframe.group

Class GroupHeader

java.lang.Object

de.unknownreality.dataframe.group.GroupHeader

All Implemented Interfaces:

Header<String>, Iterable<String>

public class GroupHeader
extends Object
implements Header<String>

Created by Alex on 11.03.2016.

Constructor Summary

Constructors

Constructor and Description
GroupHeader(String... columns)

Method Summary

Modifier and Type	Method and Description
boolean	contains(String groupValueName) Returns true if this header contains the specified group value column name
String	get(int index) Gets the group value name at a specific index.
int	getIndex(String name) Returns the index of a specific entry.
Iterator<String>	iterator() Returns an iterator over the group value names Iterator.remove() is not supported
int	size() Returns the number of group values in this header

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Detail

GroupHeader

public GroupHeader(String... columns)

Method Detail

size

public int size()

Returns the number of group values in this header

Specified by:

size in interface Header<String>

Returns:

number of group values

get

public String get(int index)

Gets the group value name at a specific index. Throws an DataFrameRuntimeException if the index is out of bounds.

Specified by:

get in interface Header<String>

Parameters:

index - index of group value

Returns:

entry at specific index

contains

public boolean contains(String groupValueName)

Returns true if this header contains the specified group value column name

Specified by:

contains in interface Header<String>

Parameters:

groupValueName - group value column name

Returns:

true if this header contains the column name

getIndex

public int getIndex(String name)

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

Specified by:

getIndex in interface Header<String>

Parameters:

name - searched entry

Returns:

index if entry

iterator

public Iterator<String> iterator()

Returns an iterator over the group value names

Iterator.remove() is not supported

Specified by:

iterator in interface Iterable<String>

Returns:

group value names iterator