Package com.yahoo.config

Class LeafNode<T>

java.lang.Object

com.yahoo.config.Node

com.yahoo.config.LeafNode<T>

All Implemented Interfaces:

java.lang.Cloneable

Direct Known Subclasses:

BooleanNode, DoubleNode, EnumNode, FileNode, IntegerNode, LongNode, PathNode, ReferenceNode, StringNode, UrlNode

public abstract class LeafNode<T>
extends Node
implements java.lang.Cloneable

Superclass for all leaf nodes in a ConfigInstance.

Subclasses represents leaf nodes with different types. These implementations should implement method value() with return-value corresponding to the actual type.

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	initialized
protected T	value

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	LeafNode()	Creates a new, uninitialized LeafNode
protected	LeafNode(boolean initialized)	Creates a new LeafNode.

Method Summary

Modifier and Type	Method	Description
protected java.lang.Object	clone()	This method is meant for internal use in the configuration system.
protected abstract boolean	doSetValue(java.lang.String value)
boolean	equals(java.lang.Object o)
abstract java.lang.String	getValue()	Subclasses must implement this, in compliance with the rules given in the return tag.
int	hashCode()
protected boolean	setValue(java.lang.String value)	Sets the value based on a string representation.
abstract java.lang.String	toString()	Subclasses must implement this, in compliance with the rules given in the return tag.
T	value()

Methods inherited from class com.yahoo.config.Node

postInitialize

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

initialized

protected boolean initialized

value

protected T value

Constructor Detail

LeafNode

protected LeafNode()

Creates a new, uninitialized LeafNode

LeafNode

protected LeafNode(boolean initialized)

Creates a new LeafNode.

Parameters:

initialized - true if this node is initialized.

Method Detail

value

public T value()

toString

public abstract java.lang.String toString()

Subclasses must implement this, in compliance with the rules given in the return tag.

Overrides:

toString in class java.lang.Object

Returns:

the String representation of the node value, or the string "(null)" if the value is null.

getValue

public abstract java.lang.String getValue()

Subclasses must implement this, in compliance with the rules given in the return tag.

Returns:

the String representation of the node value, or the 'null' object if the node value is null.

setValue

protected final boolean setValue(java.lang.String value)

Sets the value based on a string representation. Returns false if the value could not be set from the given string. TODO: return void (see doSetValue)

Parameters:

value - the value to set

Returns:

true on success, false otherwise

Throws:

java.lang.IllegalArgumentException - when value is null

doSetValue

protected abstract boolean doSetValue(java.lang.String value)

clone

protected java.lang.Object clone()

This method is meant for internal use in the configuration system. Overrides Object.clone().

Overrides:

clone in class Node

Returns:

a new instance similar to this object.

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object