org.eclipse.ocl.examples.impactanalyzer.instanceScope
Interface HashCodeChangeListener
- All Known Implementing Classes:
- BranchingNavigationStep, CompositeNavigationStep, IndirectingStep, NavigationStepSequence, PathCache
public interface HashCodeChangeListener
beforeHashCodeChange
void beforeHashCodeChange(NavigationStep step,
int token)
- Invoked before
step
's SemanticIdentity
changes its hash code. When this method is called for a step,
the afterHashCodeChange(NavigationStep, int)
is guaranteed to be called on the same listener later, immediately
after the hash code has changed. Receiving this call gives the receiver the opportunity to remove the step from hashed
structures in order to re-insert it later when the hash code has assumed the new value.
- Parameters:
token
- a token value identifying the root cause of the change by a monotonously-increasing number. This can be used in
cyclic NavigationStep
graphs to decide that a root cause has already been handled by a listener when it
comes by a second time.
afterHashCodeChange
void afterHashCodeChange(NavigationStep step,
int token)
- Called after the
step
's SemanticIdentity
hash code has changed. This gives hash structures the
opportunity to enter the step again.
- Parameters:
token
- a token value identifying the root cause of the change by a monotonously-increasing number. This can be used in
cyclic NavigationStep
graphs to decide that a root cause has already been handled by a listener when it
comes by a second time.