tauzaman.property
Class PropertyStackService

java.lang.Object
  |
  +--tauzaman.property.PropertyStackService

public class PropertyStackService

extends java.lang.Object

PropertyStackService class implements data structures to store properties and provides service to PropertyManager.

See Also:

PropertyManager

Status:

design complete, implementation complete

Field Summary

private java.util.Stack[]	propertyStackList Property Stack List
private java.util.Hashtable	propertyStackMap Property Stack Hash table, provides efficient indexing of stacks

Constructor Summary

PropertyStackService()
Constructs a PropertyStackService object, which provides stack operations for Property.

Method Summary

private java.util.Stack	getStack(java.lang.String propertyName) Returns the index of Property given its key, that is to say its name.
void	initStackMap() Initialize the hash table.
Property	peek(java.lang.String propertyName) Gets and returns the top element (Property) of the stack (without removing it).
java.util.Enumeration	peekAll(java.lang.String propertyName) Returns all elements of a given stack
void	pop() Pops all active Propertyies from their stacks, except default ones, which are the last elements in stacks.Does not deactivates default Property.
void	pop(java.lang.String propertyName) Pops the corresponding active Property from its stack.
void	popToLast() Pop all elements from their stack until the last elements, which are the default properties.
void	popToLast(java.lang.String propertyName) Pops all elements from given property stack until the last elements, which are the default properties.
void	push(Property property) Pushes a Property to its stack.

Methods inherited from class java.lang.Object

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

Field Detail

propertyStackList

private java.util.Stack[] propertyStackList

Property Stack List

propertyStackMap

private java.util.Hashtable propertyStackMap

Property Stack Hash table, provides efficient indexing of stacks

Constructor Detail

PropertyStackService

public PropertyStackService()

Constructs a PropertyStackService object, which provides stack operations for Property.

Method Detail

initStackMap

public void initStackMap()

Initialize the hash table. This might also be done by PropertyManager, by providing a string[] of property names, however, there are this many properties after all. Each key is the name of the property and correspinding value is the corresponding index in the property StackList

getStack

private java.util.Stack getStack(java.lang.String propertyName)

Returns the index of Property given its key, that is to say its name.

Parameters:

propertyName - name of a Property

Returns:

stack, which corresponds to first parameter, propertyName, in stack list

push

public void push(Property property)

Pushes a Property to its stack.

Parameters:

property - a Property

pop

public void pop(java.lang.String propertyName)

Pops the corresponding active Property from its stack. Does not deactivates default Property.

Parameters:

propertyName - name of a Property

pop

public void pop()

Pops all active Propertyies from their stacks, except default ones, which are the last elements in stacks.Does not deactivates default Property.

popToLast

public void popToLast(java.lang.String propertyName)

Pops all elements from given property stack until the last elements, which are the default properties.

Parameters:

propertyName - name of a Property

popToLast

public void popToLast()

Pop all elements from their stack until the last elements, which are the default properties.

peek

public Property peek(java.lang.String propertyName)

Gets and returns the top element (Property) of the stack (without removing it). If there is no Property, it returns null.

Parameters:

propertyName - name of a Property

Returns:

a Property

peekAll

public java.util.Enumeration peekAll(java.lang.String propertyName)

Returns all elements of a given stack

Parameters:

propertyName - name of a Property

Returns:

an Enumeration containing all Elements of a stack