org.ten60.netkernel.layer1.meta
Class DependencyMeta

java.lang.Object
  org.ten60.netkernel.layer1.meta.DependencyMeta

All Implemented Interfaces:

IURMeta, IHasDependencies

Direct Known Subclasses:

ActiveAccessorMeta, TimedExpiryDependencyMeta

public class DependencyMeta
extends java.lang.Object
implements IURMeta, IHasDependencies

An implementation of IURMeta that supports chaining of IURRepresentations for derived results such that costs and expiry dependencies are accumulated.

Field Summary

static boolean	sDebugFlag global to determine if instances should keep additional debug metadata useful for development but unused by system
protected static IURMeta[]	sEmpty

Constructor Summary

DependencyMeta(IURRepresentation aOther, int aCreationCost)

DependencyMeta(IURRepresentation aOther, int aCreationCost, int aUsageCost)

DependencyMeta(java.lang.String aMimeType, int aCreationCost, int aUsageCost)
Used by accessors for results

Method Summary

boolean	canIndependentlyExpire() return true if this meta can expire independently of its dependencies
int	getContextSensitivity() Return the depth of sensitivity on the calling context (super stack).
IURMeta[]	getCostDependenciesRecursive() get recursive list of cost dependencies
int	getCreationCost() Return an abitrary integer cost quantifier for regenerating this representation- see typical accessors for costs they assign.
IURMeta[]	getDirectDependencies() return an array of direct dependencies of this resource
IURMeta[]	getExpiryDependenciesRecursive() get recursive list of expiry dependencies
int	getLocalCreationCost() return local cost for this resource without cost of its dependencies
java.lang.String	getMimeType() Return the MIME (Multipurpose Internet Mail Extensions) type of the resource this representation represents
long	getPessimisticExpiryTime() recursively calculate the pessimistic expiry time
int	getUsageCost() return the usage cost
boolean	isExpired() recursive evaluation of isExpired by looking at dependencies
boolean	isIntermediate() return true if the representation we are the meta for is intermediate
void	setDebugString(java.lang.String aDebug)
void	setDependencies(java.util.List aCreationDependencies, java.util.List aUsageDependencies) Override any previously set dependencies
void	setIntermediate(boolean aIsIntermediate)
void	setMimeType(java.lang.String aMimeType)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

sEmpty

protected static final IURMeta[] sEmpty

sDebugFlag

public static final boolean sDebugFlag

global to determine if instances should keep additional debug metadata useful for development but unused by system

Constructor Detail

DependencyMeta

public DependencyMeta(java.lang.String aMimeType,
                      int aCreationCost,
                      int aUsageCost)

Used by accessors for results

DependencyMeta

public DependencyMeta(IURRepresentation aOther,
                      int aCreationCost,
                      int aUsageCost)

DependencyMeta

public DependencyMeta(IURRepresentation aOther,
                      int aCreationCost)

Method Detail

getMimeType

public java.lang.String getMimeType()

Description copied from interface: IURMeta

Return the MIME (Multipurpose Internet Mail Extensions) type of the resource this representation represents

Specified by:

getMimeType in interface IURMeta

setMimeType

public void setMimeType(java.lang.String aMimeType)

getUsageCost

public int getUsageCost()

return the usage cost

Specified by:

getUsageCost in interface IURMeta

getContextSensitivity

public int getContextSensitivity()

Description copied from interface: IURMeta

Return the depth of sensitivity on the calling context (super stack). 0 means no sensitivity

Specified by:

getContextSensitivity in interface IURMeta

isIntermediate

public boolean isIntermediate()

return true if the representation we are the meta for is intermediate

Specified by:

isIntermediate in interface IURMeta

setIntermediate

public void setIntermediate(boolean aIsIntermediate)

getLocalCreationCost

public int getLocalCreationCost()

Description copied from interface: IHasDependencies

return local cost for this resource without cost of its dependencies

Specified by:

getLocalCreationCost in interface IHasDependencies

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

canIndependentlyExpire

public boolean canIndependentlyExpire()

Description copied from interface: IHasDependencies

return true if this meta can expire independently of its dependencies

Specified by:

canIndependentlyExpire in interface IHasDependencies

setDebugString

public void setDebugString(java.lang.String aDebug)

setDependencies

public void setDependencies(java.util.List aCreationDependencies,
                            java.util.List aUsageDependencies)

Override any previously set dependencies

getPessimisticExpiryTime

public long getPessimisticExpiryTime()

recursively calculate the pessimistic expiry time

Specified by:

getPessimisticExpiryTime in interface IURMeta

isExpired

public boolean isExpired()

recursive evaluation of isExpired by looking at dependencies

Specified by:

isExpired in interface IURMeta

getCreationCost

public int getCreationCost()

Description copied from interface: IURMeta

Return an abitrary integer cost quantifier for regenerating this representation- see typical accessors for costs they assign. This value helps caches decide the worth of data. The value accumulates in highly derived resources

Specified by:

getCreationCost in interface IURMeta

getDirectDependencies

public IURMeta[] getDirectDependencies()

Description copied from interface: IHasDependencies

return an array of direct dependencies of this resource

Specified by:

getDirectDependencies in interface IHasDependencies

getCostDependenciesRecursive

public IURMeta[] getCostDependenciesRecursive()

Description copied from interface: IHasDependencies

get recursive list of cost dependencies

Specified by:

getCostDependenciesRecursive in interface IHasDependencies

getExpiryDependenciesRecursive

public IURMeta[] getExpiryDependenciesRecursive()

Description copied from interface: IHasDependencies

get recursive list of expiry dependencies

Specified by:

getExpiryDependenciesRecursive in interface IHasDependencies