org.eclipse.vtp.framework.engine.runtime
Class Sequence

java.lang.Object
  org.eclipse.vtp.framework.engine.runtime.Scope
      org.eclipse.vtp.framework.engine.runtime.Sequence

public class Sequence
extends Scope

Implementation of the action scope and context.

Author:

Lonnie Pryor

Nested Class Summary

protected class

Sequence.Context Implementation of the generic context.

Field Summary

protected Sequence.Context	context The generic context implementation.
protected Execution	execution The owner of this sequence.

Constructor Summary

Sequence(Execution execution)
Creates a new Sequence.

Method Summary

protected java.util.Collection	getServices(java.lang.String identifier)
boolean	hasNext() Returns true if there is another step in this sequence.
boolean	isNextBlocking() Returns true if the next step is blocking.
Sequence	next() Executes the next executable.

Methods inherited from class org.eclipse.vtp.framework.engine.runtime.Scope

getServiceInstance, lookupAllInScope, lookupInScope, registerImplicitServices

Methods inherited from class java.lang.Object

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

Field Detail

execution

protected final Execution execution

The owner of this sequence.

context

protected final Sequence.Context context

The generic context implementation.

Constructor Detail

Sequence

public Sequence(Execution execution)
         throws java.lang.NullPointerException

Creates a new Sequence.

Parameters:

execution - The owner of this sequence.

Throws:

java.lang.NullPointerException - If the supplied execution is null.

Method Detail

hasNext

public boolean hasNext()

Returns true if there is another step in this sequence.

Returns:

True if there is another step in this sequence.

isNextBlocking

public boolean isNextBlocking()

Returns true if the next step is blocking.

Returns:

True if the next step is blocking

next

public Sequence next()

Executes the next executable.

Returns:

The next sequence to use or null if there are no more executable objects to run.

getServices

protected java.util.Collection getServices(java.lang.String identifier)

Specified by:

getServices in class Scope