org.jibx.binding.util
Class SparseStack

java.lang.Object
  org.jibx.binding.util.SparseStack

public class SparseStack
extends java.lang.Object

Stack for values that depend on the level of nesting, where only some of the levels change the current value.

Author:

Dennis M. Sosnoski

Field Summary

private java.lang.Object	m_current Current item.
private ObjectStack	m_items Stack of different items (paired with m_levels stack).
private int	m_level Current nesting level.
private IntStack	m_levels Levels with different items (paired with m_items stack).

Constructor Summary

SparseStack()
Constructor with no initial value.

SparseStack(java.lang.Object current)
Constructor with initial value.

Method Summary

void	enter() Enter a level of nesting.
java.lang.Object	exit() Exit a level of nesting with changed item returned.
java.lang.Object	getCurrent() Get current object.
void	setCurrent(java.lang.Object obj) Set current object.

Methods inherited from class java.lang.Object

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

Field Detail

m_current

private java.lang.Object m_current

Current item.

m_level

private int m_level

Current nesting level.

m_levels

private IntStack m_levels

Levels with different items (paired with m_items stack).

m_items

private ObjectStack m_items

Stack of different items (paired with m_levels stack).

Constructor Detail

SparseStack

public SparseStack(java.lang.Object current)

Constructor with initial value.

Parameters:

current - initial value

SparseStack

public SparseStack()

Constructor with no initial value.

Method Detail

getCurrent

public java.lang.Object getCurrent()

Get current object.

Returns:

current

setCurrent

public void setCurrent(java.lang.Object obj)

Set current object.

Parameters:

obj - set the current object

enter

public void enter()

Enter a level of nesting.

exit

public java.lang.Object exit()

Exit a level of nesting with changed item returned.

Returns:

item that was active until this exit, or null if same item still active