Header (org.refcodes:refcodes-tabular 1.10.2 API)

Type Parameters:

T - The type managed by the Header.

All Superinterfaces:

org.refcodes.structure.Clearable, java.util.Collection<T>, ColumnRow<T,C>, HeaderRow<T,Column<? extends T>>, java.lang.Iterable<T>, org.refcodes.structure.Keys<T,C>, org.refcodes.structure.Keys.MutableKeys<T,C>, java.util.List<T>

All Known Implementing Classes:

HeaderImpl
```
public interface Header<T>
extends HeaderRow<T,Column<? extends T>>
```
A list of Column instances, for example describing the elements of a CSV file (visually speaking the of the CSV file's header line), is represented by the Header. The Header preserves an order for a list of Column instances. A Header provides the semantics for related Row instances.
The Keys.keySet() method must provide a predictable order as ensured by the LinkedHashSet class as of the ordered nature of the Header.

Nested Class Summary
- Nested classes/interfaces inherited from interface org.refcodes.structure.Keys
  org.refcodes.structure.Keys.MutableKeys<K extends java.lang.Object,V extends java.lang.Object>, org.refcodes.structure.Keys.MutableValues<K extends java.lang.Object,V extends java.lang.Object>

Method Summary

All Methods Instance Methods Default Methods
Modifier and Type	Method	Description
`default java.lang.String[]`	`toKeys()`	Returns the keys of the `Header` in the intended order.
`default java.lang.Class<T>`	`toType()`	Determines the least common denominator type by evaluating the `Column` instances contained within this `Header`.
`default T[]`	`toValues(Record<T> aRecord)`	Returns an array of the values stored by the `Record` in the order as defined by the header.

Methods inherited from interface org.refcodes.structure.Clearable
clear

Methods inherited from interface java.util.Collection
parallelStream, removeIf, stream

Methods inherited from interface org.refcodes.tabular.ColumnRow
containsValue, withColumns

Methods inherited from interface org.refcodes.tabular.HeaderRow
fromStorageString, fromStorageString, fromStorageStringRecord, fromStorageStringRow, fromStorageStrings, fromStorageStrings, fromStorageStringsRecord, fromStorageStringsRow, indexOf, toPrintable, toPrintable, toPrintableRecord, toPrintableRow, toRecord, toRecordIgnoreType, toRow, toRowIgnoreType, toStorageString, toStorageString, toStorageStringRecord, toStorageStringRow, toStorageStrings, toStorageStrings, toStorageStringsRecord, toStorageStringsRow

Methods inherited from interface java.lang.Iterable
forEach

Methods inherited from interface org.refcodes.structure.Keys
containsKey, get, keySet, use, values

Methods inherited from interface org.refcodes.structure.Keys.MutableKeys
delete

Methods inherited from interface java.util.List
add, add, addAll, addAll, clear, contains, containsAll, equals, get, hashCode, indexOf, isEmpty, iterator, lastIndexOf, listIterator, listIterator, of, of, of, of, of, of, of, of, of, of, of, of, remove, remove, removeAll, replaceAll, retainAll, set, size, sort, spliterator, subList, toArray, toArray

- Method Detail
  - toKeys
```
default java.lang.String[] toKeys()
```
    Returns the keys of the Header in the intended order.
    
    Returns:
    
    The keys of the Header in correct order.
  - toValues
```
default T[] toValues(Record<T> aRecord)
```
    Returns an array of the values stored by the Record in the order as defined by the header.
    
    Parameters:
    
    aRecord - The Record to be converted to an array of values.
    
    Returns:
    
    The array of values.
  - toType
```
default java.lang.Class<T> toType()
```
    Determines the least common denominator type by evaluating the Column instances contained within this Header.
    
    Returns:
    
    Determines the lest common denominator type or null (in case there are no Column instances in the Header).