Package net.sf.basedb.util

Class Tree<E>

java.lang.Object

net.sf.basedb.util.Tree<E>

All Implemented Interfaces:

Iterable<E>, Collection<E>

public class Tree<E>
extends Object
implements Collection<E>

Version:

2.0

Author:

Nicklas

Last modified

$Date: 2015-05-12 11:27:08 +0200 (ti, 12 maj 2015) $

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private class	Tree.ElementIterator	An iterator that return elements for each node.
static class	Tree.Entry<E>	Represents an entry for a node in the tree.
private class	Tree.EntryIterator	An iterator that return entries for each node.

Field Summary

Fields

Modifier and Type	Field	Description
private final Map<E,Tree.Entry<E>>	entries
private final E	root

Constructor Summary

Constructors

Constructor	Description
Tree(E root)	Create a new tree with the with the default initial capacity (16).
Tree(E root, int initialCapacity)	Create a new tree with the with the specified initial capacity.

Method Summary

Modifier and Type	Method	Description
boolean	add(E o)	Not supported.
boolean	addAll(Collection<? extends E> c)	Not supported.
private void	addEntry(Tree.Entry<E> entry)
void	clear()	Clear all elements except the root element.
boolean	contains(Object o)
boolean	containsAll(Collection<?> c)
Iterator<Tree.Entry<E>>	entryIterator()	Create an iterator for the tree that returns entry object.
Iterator<Tree.Entry<E>>	entryIterator(E node)	Create an iterator for the tree starting at a specific node.
boolean	equals(Object o)	Equality only tests if the object is the same instance of this tree.
Tree.Entry<E>	getEntry(E node)	Get the entry for an arbitrary node.
Tree.Entry<E>	getRootEntry()	Get the entry for the root node.
int	hashCode()
boolean	isEmpty()
Iterator<E>	iterator()
boolean	remove(Object o)	Not supported.
boolean	removeAll(Collection<?> c)	Not supported.
boolean	retainAll(Collection<?> c)	Not supported.
int	size()
Object[]	toArray()	Not supported.
<T> T[]	toArray(T[] a)	Not supported.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Collection

parallelStream, removeIf, spliterator, stream, toArray

Methods inherited from interface java.lang.Iterable

forEach

Field Details

root

private final E root

entries

private final Map<E,Tree.Entry<E>> entries

Constructor Details

Tree

public Tree(E root)

Create a new tree with the with the default initial capacity (16).

Parameters:

root - The root node element of the tree

Tree

public Tree(E root,
 int initialCapacity)

Create a new tree with the with the specified initial capacity.

Parameters:

root - The root node element of the tree

initialCapacity - The initial capacity

Method Details

add

public boolean add(E o)

Not supported.

Specified by:

add in interface Collection<E>

Throws:

UnsupportedOperationException - Always

See Also:

• Tree.Entry.addChild(Object)

addAll

public boolean addAll(Collection<? extends E> c)

Not supported.

Specified by:

addAll in interface Collection<E>

Throws:

UnsupportedOperationException - Always

clear

public void clear()

Clear all elements except the root element.

Specified by:

clear in interface Collection<E>

contains

public boolean contains(Object o)

Specified by:

contains in interface Collection<E>

containsAll

public boolean containsAll(Collection<?> c)

Specified by:

containsAll in interface Collection<E>

equals

public boolean equals(Object o)

Equality only tests if the object is the same instance of this tree. Note! In the future, the implementation may change to also check the entire tree structure.

Specified by:

equals in interface Collection<E>

Overrides:

equals in class Object

hashCode

public int hashCode()

Specified by:

hashCode in interface Collection<E>

Overrides:

hashCode in class Object

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Collection<E>

iterator

public Iterator<E> iterator()

Specified by:

iterator in interface Collection<E>

Specified by:

iterator in interface Iterable<E>

remove

public boolean remove(Object o)

Not supported.

Specified by:

remove in interface Collection<E>

Throws:

UnsupportedOperationException - Always

removeAll

public boolean removeAll(Collection<?> c)

Not supported.

Specified by:

removeAll in interface Collection<E>

Throws:

UnsupportedOperationException - Always

retainAll

public boolean retainAll(Collection<?> c)

Not supported.

Specified by:

retainAll in interface Collection<E>

Throws:

UnsupportedOperationException - Always

size

public int size()

Specified by:

size in interface Collection<E>

toArray

public Object[] toArray()

Not supported.

Specified by:

toArray in interface Collection<E>

Throws:

UnsupportedOperationException - Always

toArray

public <T> T[] toArray(T[] a)

Not supported.

Specified by:

toArray in interface Collection<E>

Throws:

UnsupportedOperationException - Always

getRootEntry

public Tree.Entry<E> getRootEntry()

Get the entry for the root node.

Returns:

The Entry object for the root node.

getEntry

public Tree.Entry<E> getEntry(E node)

Get the entry for an arbitrary node.

Parameters:

node - The node to get the entry for.

Returns:

An Entry object or null if the node isn't found

entryIterator

public Iterator<Tree.Entry<E>> entryIterator()

Create an iterator for the tree that returns entry object. The iterator starts at the root.

Returns:

An Iterator object

See Also:

• iterator()

entryIterator

public Iterator<Tree.Entry<E>> entryIterator(E node)

Create an iterator for the tree starting at a specific node.

Parameters:

node - The node to start at

Returns:

An Iterator object

See Also:

• iterator()

addEntry

private void addEntry(Tree.Entry<E> entry)