com.arjuna.mwlabs.wsas.activity

Class ActivityHierarchyImple

java.lang.Object

com.arjuna.mwlabs.wsas.activity.ActivityHierarchyImple

All Implemented Interfaces:

ActivityHierarchy

public class ActivityHierarchyImple
extends Object
implements ActivityHierarchy

This class represents a handle on a stack of activities. It should only be used for suspending and resuming the thread-to-activity association. The activity at the top of the stack is the current activity.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ActivityHierarchyImple(ActivityHierarchyImple toCopy)
	ActivityHierarchyImple(ActivityImple current)

Method Summary

Modifier and Type	Method and Description
ActivityHandle	activity(int index)
ActivityHierarchy	copy() Obtain a copy of this context.
ActivityHandle	current()
boolean	equals(Object obj) Overrides Object.equals Two contexts are equal if both hierarchies are identical.
int	hashCode() Although users won't typically care what the underlying implementation of a context is, they will need to do comparisons.
int	size()
String	toString()
boolean	valid()

Methods inherited from class java.lang.Object

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

Constructor Detail

ActivityHierarchyImple

public ActivityHierarchyImple(ActivityImple current)

ActivityHierarchyImple

protected ActivityHierarchyImple(ActivityHierarchyImple toCopy)

Method Detail

size

public int size()

Specified by:

size in interface ActivityHierarchy

Returns:

the number of activities associated with this stack.

valid

public boolean valid()

Specified by:

valid in interface ActivityHierarchy

Returns:

whether or not this is a valid context. If a single entry in the context is invalid then we assume the entire context is.

activity

public ActivityHandle activity(int index)
                        throws IndexOutOfBoundsException

Specified by:

activity in interface ActivityHierarchy

Parameters:

the - specific activity in the stack.

Returns:

the activity handle.

Throws:

IndexOutOfBoundsException - Thrown if the activity number is too large or small.

current

public ActivityHandle current()

Specified by:

current in interface ActivityHierarchy

Returns:

the current activity in the context.

copy

public ActivityHierarchy copy()

Obtain a copy of this context. Although the context may be shared between different threads, the same instance of the context should not be.

Specified by:

copy in interface ActivityHierarchy

Returns:

the context copy.

equals

public boolean equals(Object obj)

Overrides Object.equals Two contexts are equal if both hierarchies are identical.

Specified by:

equals in interface ActivityHierarchy

Overrides:

equals in class Object

Returns:

true if the two objects are the same, false otherwise.

hashCode

public int hashCode()

Although users won't typically care what the underlying implementation of a context is, they will need to do comparisons. So, although this method is provided by Java.Object we have it here to ensure that we don't forget to implement it!

Specified by:

hashCode in interface ActivityHierarchy

Overrides:

hashCode in class Object

Returns:

the hash value for the target.

toString

public String toString()

Overrides:

toString in class Object