org.eigenbase.util
Class CompoundClosableAllocation

java.lang.Object
  org.eigenbase.util.CompoundClosableAllocation

All Implemented Interfaces:

ClosableAllocation, ClosableAllocationOwner

Direct Known Subclasses:

FarragoCompoundAllocation, FarragoSequenceAccessor

public class CompoundClosableAllocation
extends Object
implements ClosableAllocationOwner

CompoundClosableAllocation represents a collection of ClosableAllocations which share a common lifecycle. It guarantees that allocations are closed in the reverse order in which they were added.

Version:

$Id: //open/dev/farrago/src/org/eigenbase/util/CompoundClosableAllocation.java#8 $

Author:

John V. Sichi

Field Summary

protected List<ClosableAllocation>

allocations List of owned ClosableAllocation objects.

Constructor Summary

CompoundClosableAllocation()

Method Summary

void	addAllocation(ClosableAllocation allocation) Assigns ownership of a ClosableAllocation to this owner.
void	closeAllocation() Closes this object.
boolean	forgetAllocation(ClosableAllocation allocation) Forgets an allocation without closing it.
boolean	hasAllocations()

Methods inherited from class java.lang.Object

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

Field Detail

allocations

protected List<ClosableAllocation> allocations

List of owned ClosableAllocation objects.

Constructor Detail

CompoundClosableAllocation

public CompoundClosableAllocation()

Method Detail

addAllocation

public void addAllocation(ClosableAllocation allocation)

Description copied from interface: ClosableAllocationOwner

Assigns ownership of a ClosableAllocation to this owner.

Specified by:

addAllocation in interface ClosableAllocationOwner

Parameters:

allocation - the ClosableAllocation to take over

closeAllocation

public void closeAllocation()

Description copied from interface: ClosableAllocation

Closes this object.

Specified by:

closeAllocation in interface ClosableAllocation

forgetAllocation

public boolean forgetAllocation(ClosableAllocation allocation)

Forgets an allocation without closing it.

Parameters:

allocation - the allocation to forget

Returns:

whether the allocation was known

hasAllocations

public boolean hasAllocations()

Returns:

whether any allocations remain unclosed