Package overit.geocall.util

Class DependencyChain<T>

java.lang.Object

overit.geocall.util.DependencyChain<T>

public class DependencyChain<T>
extends Object

Simple implementation of a list that allows you to define dependency constraints between the various elements using the DependencyChain.Item.isAfter(DependencyChain.Item) and DependencyChain.Item.isBefore(DependencyChain.Item) methods. Once the constraints have been defined, it allows you to obtain a list whose order of the elements respects the assigned constraints.

 DependencyChain<String> chain = new DependencyChain<>();
 Item<String> i2 = chain.add("second");
 Item<String> i1 = chain.add("first");
 i1.isBefore(i2);
 List<String> orderedList = chain.sort();
 

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	DependencyChain.Item<T>	Single entry of the chain

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	changed
protected Set<DependencyChain.Item<T>>	list

Constructor Summary

Constructors

Constructor	Description
DependencyChain()

Method Summary

Modifier and Type	Method	Description
DependencyChain.Item<T>	add(T name)	Add a new object into the chain
List<T>	sort()	Get the list ordered based on the constraint set with the DependencyChain.Item.isAfter(DependencyChain.Item) and DependencyChain.Item.isBefore(DependencyChain.Item) methods

Methods inherited from class java.lang.Object

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

Field Details

list

protected Set<DependencyChain.Item<T>> list

changed

protected boolean changed

Constructor Details

DependencyChain

public DependencyChain()

Method Details

add

public DependencyChain.Item<T> add(T name)

Add a new object into the chain

Parameters:

name - instance of the object that will be added

Returns:

the Item already added

sort

public List<T> sort()

Get the list ordered based on the constraint set with the DependencyChain.Item.isAfter(DependencyChain.Item) and DependencyChain.Item.isBefore(DependencyChain.Item) methods

Returns:

the list ordered by the dependency constraint