Package jmri.jmrit.logixng.implementation

Class DefaultStack

java.lang.Object

jmri.jmrit.logixng.implementation.DefaultStack

All Implemented Interfaces:

Stack

public class DefaultStack
extends Object
implements Stack

The default implementation of a NamedTable

Nested Class Summary

Nested classes/interfaces inherited from interface jmri.jmrit.logixng.Stack

Stack.ValueAndType

Field Summary

Fields

Modifier and Type	Field	Description
(package private) int	_count
(package private) int	_size
(package private) static final int	GROW_SIZE
(package private) static final int	INITIAL_SIZE

Constructor Summary

Constructors

Constructor	Description
DefaultStack()

Method Summary

Modifier and Type	Method	Description
int	getCount()	Get the number of items on the stack
Stack.ValueAndType	getValueAndTypeAtIndex(int index)	Get the value and type at an index
Object	getValueAtIndex(int index)	Get the value at an index
Object	pop()	Pops the topmost value off the top of the stack so the stack shrinks.
void	push(Stack.ValueAndType valueAndType)	Pushes a value on the top of the stack so the stack grow.
void	setCount(int newCount)	Reset the number of items on the stack.
void	setValueAndTypeAtIndex(int index, Stack.ValueAndType valueAndType)	Set the value at an index
void	setValueAtIndex(int index, Object value)	Set the value at an index

Methods inherited from class java.lang.Object

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

Field Details

INITIAL_SIZE

static final int INITIAL_SIZE

See Also:

• Constant Field Values

GROW_SIZE

static final int GROW_SIZE

See Also:

• Constant Field Values

_size

int _size

_count

int _count

Constructor Details

DefaultStack

public DefaultStack()

Method Details

push

public void push(Stack.ValueAndType valueAndType)

Pushes a value on the top of the stack so the stack grow.

Specified by:

push in interface Stack

Parameters:

valueAndType - the value to push to the stack

pop

public Object pop()

Pops the topmost value off the top of the stack so the stack shrinks.

Specified by:

pop in interface Stack

Returns:

the value that is on the top of the stack

getValueAtIndex

public Object getValueAtIndex(int index)

Get the value at an index

Specified by:

getValueAtIndex in interface Stack

Parameters:

index - the index from bottom of the table

Returns:

value the new value

setValueAtIndex

public void setValueAtIndex(int index,
 Object value)

Set the value at an index

Specified by:

setValueAtIndex in interface Stack

Parameters:

index - the index from bottom of the table

value - the new value

getValueAndTypeAtIndex

public Stack.ValueAndType getValueAndTypeAtIndex(int index)

Get the value and type at an index

Specified by:

getValueAndTypeAtIndex in interface Stack

Parameters:

index - the index from bottom of the table

Returns:

value and type the new value

setValueAndTypeAtIndex

public void setValueAndTypeAtIndex(int index,
 Stack.ValueAndType valueAndType)

Set the value at an index

Specified by:

setValueAndTypeAtIndex in interface Stack

Parameters:

index - the index from bottom of the table

valueAndType - the new value and type

getCount

public int getCount()

Get the number of items on the stack

Specified by:

getCount in interface Stack

Returns:

the number of items

setCount

public void setCount(int newCount)

Reset the number of items on the stack. This is used when parameters are put on the stack before a call to a module and those parameters needs to be removed when the module returns. The new count must be less than or equal to the current number of items.

Specified by:

setCount in interface Stack

Parameters:

newCount - the new number of items