org.apache.commons.configuration.tree
Class NodeAddData

java.lang.Object
  org.apache.commons.configuration.tree.NodeAddData

public class NodeAddData
extends Object

A simple data class used by ExpressionEngine to store the results of the prepareAdd() operation.

If a new property is to be added to a configuration, the affected Configuration object must know, where in its hierarchy of configuration nodes new elements have to be added. This information is obtained by an ExpressionEngine object that interprets the key of the new property. This expression engine will pack all information necessary for the configuration to perform the add operation in an instance of this class.

Information managed by this class contains:

• the configuration node, to which new elements must be added
• the name of the new node
• whether the new node is a child node or an attribute node
• if a whole branch is to be added at once, the names of all nodes between the parent node (the target of the add operation) and the new node

Since:

1.3

Author:

Oliver Heger

Constructor Summary

NodeAddData()
Creates a new, uninitialized instance of NodeAddData.

NodeAddData(ConfigurationNode parent, String nodeName)
Creates a new instance of NodeAddData and sets the most important data fields.

Method Summary

void	addPathNode(String nodeName) Adds the name of a path node.
String	getNewNodeName() Returns the name of the new node.
ConfigurationNode	getParent() Returns the parent node.
List	getPathNodes() Returns a list with further nodes that must be added.
boolean	isAttribute() Returns a flag if the new node to be added is an attribute.
void	setAttribute(boolean attribute) Sets the attribute flag.
void	setNewNodeName(String newNodeName) Sets the name of the new node.
void	setParent(ConfigurationNode parent) Sets the parent node.

Methods inherited from class java.lang.Object

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

Constructor Detail

NodeAddData

public NodeAddData()

Creates a new, uninitialized instance of NodeAddData.

NodeAddData

public NodeAddData(ConfigurationNode parent,
                   String nodeName)

Creates a new instance of NodeAddData and sets the most important data fields.

Parameters:

parent - the parent node

nodeName - the name of the new node

Method Detail

isAttribute

public boolean isAttribute()

Returns a flag if the new node to be added is an attribute.

Returns:

true for an attribute node, false for a child node

setAttribute

public void setAttribute(boolean attribute)

Sets the attribute flag. This flag determines whether an attribute or a child node will be added.

Parameters:

attribute - the attribute flag

getNewNodeName

public String getNewNodeName()

Returns the name of the new node.

Returns:

the new node's name

setNewNodeName

public void setNewNodeName(String newNodeName)

Sets the name of the new node. A node with this name will be added to the configuration's node hierarchy.

Parameters:

newNodeName - the name of the new node

getParent

public ConfigurationNode getParent()

Returns the parent node.

Returns:

the parent node

setParent

public void setParent(ConfigurationNode parent)

Sets the parent node. New nodes will be added to this node.

Parameters:

parent - the parent node

getPathNodes

public List getPathNodes()

Returns a list with further nodes that must be added. This is needed if a complete branch is to be added at once. For instance imagine that there exists only a node database. Now the key database.connection.settings.username (assuming the syntax of the default expression engine) is to be added. Then username is the name of the new node, but the nodes connection and settings must be added to the parent node first. In this example these names would be returned by this method.

Returns:

a list with the names of nodes that must be added as parents of the new node (never null)

addPathNode

public void addPathNode(String nodeName)

Adds the name of a path node. With this method an additional node to be added can be defined.

Parameters:

nodeName - the name of the node

See Also:

getPathNodes()