org.apache.zookeeper.common

Class PathTrie

java.lang.Object

org.apache.zookeeper.common.PathTrie

public class PathTrie
extends Object

a class that implements prefix matching for components of a filesystem path. the trie looks like a tree with edges mapping to the component of a path. example /ab/bc/cf would map to a trie / ab/ (ab) bc/ / (bc) cf/ (cf)

Constructor Summary

Constructors

Constructor and Description
PathTrie() Construct a new PathTrie with a root node.

Method Summary

Modifier and Type	Method and Description
void	addPath(String path) Add a path to the path trie.
void	clear() Clear all nodes in the trie.
void	deletePath(String path) Delete a path from the trie.
boolean	existsNode(String path) Return true if the given path exists in the trie, otherwise return false; All paths are relative to the root node.
String	findMaxPrefix(String path) Return the largest prefix for the input path.

Methods inherited from class java.lang.Object

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

Constructor Detail

PathTrie

public PathTrie()

Construct a new PathTrie with a root node.

Method Detail

addPath

public void addPath(String path)

Add a path to the path trie. All paths are relative to the root node.

Parameters:

path - the path to add to the trie

deletePath

public void deletePath(String path)

Delete a path from the trie. All paths are relative to the root node.

Parameters:

path - the path to be deleted

existsNode

public boolean existsNode(String path)

Return true if the given path exists in the trie, otherwise return false; All paths are relative to the root node.

Parameters:

path - the input path

Returns:

the largest prefix for the

findMaxPrefix

public String findMaxPrefix(String path)

Return the largest prefix for the input path. All paths are relative to the root node.

Parameters:

path - the input path

Returns:

the largest prefix for the input path

clear

public void clear()

Clear all nodes in the trie.