org.rhq.augeas.tree

Interface AugeasTree

All Known Implementing Classes:

AbstractAugeasTree, AugeasTreeLazy, AugeasTreeReal

public interface AugeasTree

Represents the augeas tree.

Author:

Filip Drabek

Field Summary

Fields

Modifier and Type	Field and Description
static String	AUGEAS_DATA_PATH All the paths to nodes representing configuration data in Augeas are prefixed by this.
static char	PATH_SEPARATOR Path separator in the Augeas expressions.

Method Summary

Methods

Modifier and Type	Method and Description
AugeasNode	createNode(AugeasNode parentNode, String name, String value, int seq) Creates a new child node under given parent.
AugeasNode	createNode(String fullPath) Creates a new node on given path.
String	get(String expr) Returns a value of the first node matching the expression.
File	getFile(AugeasNode node)
AugeasNode	getNode(String path) Checks whether a node exists on given path.
AugeasNode	getRootNode()
List<AugeasNode>	match(String expression) Performs a search using Augeas expression on the tree.
List<AugeasNode>	matchRelative(AugeasNode node, String expression) Performs a search using Augeas expression on the tree starting at given node.
void	removeNode(AugeasNode node, boolean updateSeq) Removes the node from the tree optionally updating the sequence numbers of its siblings.
void	save() Persists the tree using Augeas to the individual files.
void	setRootNode(AugeasNode node) Sets the root node.
void	setValue(AugeasNode node, String value) Sets the value of the node directly in Augeas, bypassing the in-memory tree representation.
String	summarizeAugeasError()

Field Detail

PATH_SEPARATOR

static final char PATH_SEPARATOR

Path separator in the Augeas expressions.

See Also:

Constant Field Values

AUGEAS_DATA_PATH

static final String AUGEAS_DATA_PATH

All the paths to nodes representing configuration data in Augeas are prefixed by this.

See Also:

Constant Field Values

Method Detail

save

void save()

Persists the tree using Augeas to the individual files.

getNode

AugeasNode getNode(String path)
                   throws AugeasTreeException

Checks whether a node exists on given path. If it exists, the node is returned otherwise a new one is created and returned.

Parameters:

path - the path to look for

Returns:

the node on given path

Throws:

AugeasTreeException

match

List<AugeasNode> match(String expression)
                       throws AugeasTreeException

Performs a search using Augeas expression on the tree.

Parameters:

expression -

Returns:

list of nodes matching the expression

Throws:

AugeasTreeException

matchRelative

List<AugeasNode> matchRelative(AugeasNode node,
                             String expression)
                               throws AugeasTreeException

Performs a search using Augeas expression on the tree starting at given node.

Parameters:

node - the node to start searching from

expression - the expression

Returns:

list of child nodes matching the expressions

Throws:

AugeasTreeException

createNode

AugeasNode createNode(String fullPath)
                      throws AugeasTreeException

Creates a new node on given path. If there already exists a node on given path, it is returned instead.

Parameters:

fullPath -

Returns:

Throws:

AugeasTreeException

createNode

AugeasNode createNode(AugeasNode parentNode,
                    String name,
                    String value,
                    int seq)
                      throws AugeasTreeException

Creates a new child node under given parent.

Parameters:

parentNode - the parent node

name - name of the child node

value - value of the child node

seq - the sequence number of the child node

Returns:

the child nodes

Throws:

AugeasTreeException

get

String get(String expr)

Returns a value of the first node matching the expression. Akin to Augeas.get(String).

Parameters:

expr - the Augeas expression.

Returns:

the value

getRootNode

AugeasNode getRootNode()

Returns:

returns the root node of the tree.

removeNode

void removeNode(AugeasNode node,
              boolean updateSeq)
                throws AugeasTreeException

Removes the node from the tree optionally updating the sequence numbers of its siblings.

Parameters:

node - the node to remove

updateSeq - whether to update sequence numbers or not.

Throws:

AugeasTreeException

setValue

void setValue(AugeasNode node,
            String value)

Sets the value of the node directly in Augeas, bypassing the in-memory tree representation.

Parameters:

node -

value -

getFile

File getFile(AugeasNode node)

Parameters:

node -

Returns:

the file in which the configuration represented by the node is defined.

summarizeAugeasError

String summarizeAugeasError()

Returns:

a summary of an update error obtained from the Augeas library.

setRootNode

void setRootNode(AugeasNode node)

Sets the root node.

Parameters:

node -