Metric Results

[ summary ] [ packages ] [ cycles ] [ explanations ]

The following document contains the results of a JDepend metric analysis. The various metrics are defined at the bottom of this document.

Summary

[ summary ] [ packages ] [ cycles ] [ explanations ]

Package TC CC AC Ca Ce A I D V
net.sf.urlchecker.commands 10 6 4 3 15 40.0% 83.0% 23.0% 1
net.sf.urlchecker.communication 4 3 1 3 12 25.0% 80.0% 5.0% 1
net.sf.urlchecker.communication.configurers 7 6 1 3 10 14.0% 77.0% 9.0% 1
net.sf.urlchecker.events 4 2 2 2 4 50.0% 67.0% 17.0% 1
net.sf.urlchecker.exception.handling 3 2 1 3 3 33.0% 50.0% 17.0% 1
net.sf.urlchecker.v2.commands 2 2 0 0 15 0.0% 100.0% 0.0% 1
net.sf.urlchecker.v2.communication 4 4 0 2 18 0.0% 90.0% 10.0% 1
net.sf.urlchecker.v2.communication.configurers 3 3 0 1 18 0.0% 95.0% 5.0% 1
net.sf.urlchecker.v2.exception.handling 2 2 0 0 4 0.0% 100.0% 0.0% 1

Packages

[ summary ] [ packages ] [ cycles ] [ explanations ]

net.sf.urlchecker.commands

Afferent Couplings Efferent Couplings Abstractness Instability Distance
3 15 40.0% 83.0% 23.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
net.sf.urlchecker.commands.AbstractCommand
net.sf.urlchecker.commands.CheckUrlsGeneric
net.sf.urlchecker.commands.Command
net.sf.urlchecker.commands.Context
net.sf.urlchecker.commands.CheckUrlsCommand
net.sf.urlchecker.commands.CheckUrlsProcess
net.sf.urlchecker.commands.Result
net.sf.urlchecker.commands.RetryHandler
net.sf.urlchecker.commands.StandardContext
net.sf.urlchecker.commands.URLMatchCommand
net.sf.urlchecker.communication
net.sf.urlchecker.events
net.sf.urlchecker.v2.commands
java.io
java.lang
java.net
java.text
java.util
java.util.concurrent
net.sf.urlchecker.communication
net.sf.urlchecker.events
net.sf.urlchecker.exception.handling
org.apache.commons.collections
org.apache.commons.configuration
org.apache.commons.httpclient
org.apache.commons.lang
org.apache.commons.lang.builder
org.apache.log4j

net.sf.urlchecker.communication

Afferent Couplings Efferent Couplings Abstractness Instability Distance
3 12 25.0% 80.0% 5.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
net.sf.urlchecker.communication.GenericCommunicationFactory
net.sf.urlchecker.communication.CommunicationBuilder
net.sf.urlchecker.communication.CommunicationFactory
net.sf.urlchecker.communication.HTTPMethods
net.sf.urlchecker.commands
net.sf.urlchecker.communication.configurers
net.sf.urlchecker.v2.communication
java.lang
java.text
java.util
java.util.regex
net.sf.urlchecker.commands
net.sf.urlchecker.communication.configurers
org.apache.commons.configuration
org.apache.commons.httpclient
org.apache.commons.httpclient.methods
org.apache.commons.httpclient.params
org.apache.commons.lang
org.apache.log4j

net.sf.urlchecker.communication.configurers

Afferent Couplings Efferent Couplings Abstractness Instability Distance
3 10 14.0% 77.0% 9.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
net.sf.urlchecker.communication.configurers.Configurer
net.sf.urlchecker.communication.configurers.ClientConfigurer
net.sf.urlchecker.communication.configurers.ExceptionHandlersConfigurer
net.sf.urlchecker.communication.configurers.MethodsConfigurer
net.sf.urlchecker.communication.configurers.RetriesConfigurer
net.sf.urlchecker.communication.configurers.URLPatternConfigurer
net.sf.urlchecker.communication.configurers.ValidCodesConfigurer
net.sf.urlchecker.communication
net.sf.urlchecker.v2.communication
net.sf.urlchecker.v2.communication.configurers
java.lang
java.util
net.sf.urlchecker.communication
net.sf.urlchecker.exception.handling
org.apache.commons.configuration
org.apache.commons.httpclient
org.apache.commons.httpclient.auth
org.apache.commons.httpclient.params
org.apache.commons.lang
org.apache.log4j

net.sf.urlchecker.events

Afferent Couplings Efferent Couplings Abstractness Instability Distance
2 4 50.0% 67.0% 17.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
net.sf.urlchecker.events.ChainEvent
net.sf.urlchecker.events.ChainListener
net.sf.urlchecker.events.BasicChainEvent
net.sf.urlchecker.events.EventTypes
net.sf.urlchecker.commands
net.sf.urlchecker.v2.commands
java.lang
java.util
net.sf.urlchecker.commands
org.apache.commons.lang.builder

net.sf.urlchecker.exception.handling

Afferent Couplings Efferent Couplings Abstractness Instability Distance
3 3 33.0% 50.0% 17.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
net.sf.urlchecker.exception.handling.ExceptionHandler
net.sf.urlchecker.exception.handling.AlwaysFalse
net.sf.urlchecker.exception.handling.AlwaysTrue
net.sf.urlchecker.commands
net.sf.urlchecker.communication.configurers
net.sf.urlchecker.v2.exception.handling
java.io
java.lang
org.apache.commons.httpclient

net.sf.urlchecker.v2.commands

Afferent Couplings Efferent Couplings Abstractness Instability Distance
0 15 0.0% 100.0% 0.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
None net.sf.urlchecker.v2.commands.CheckUrlsCommand
net.sf.urlchecker.v2.commands.CheckUrlsProcess
None java.io
java.lang
java.util
java.util.concurrent
net.sf.urlchecker.commands
net.sf.urlchecker.events
net.sf.urlchecker.v2.communication
org.apache.commons.configuration
org.apache.commons.lang
org.apache.http
org.apache.http.client
org.apache.http.client.methods
org.apache.http.impl.conn.tsccm
org.apache.http.protocol
org.apache.log4j

net.sf.urlchecker.v2.communication

Afferent Couplings Efferent Couplings Abstractness Instability Distance
2 18 0.0% 90.0% 10.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
None net.sf.urlchecker.v2.communication.CommunicationBuilder
net.sf.urlchecker.v2.communication.CommunicationFactory
net.sf.urlchecker.v2.communication.HTTPMethods
net.sf.urlchecker.v2.communication.RequestRetryHandler
net.sf.urlchecker.v2.commands
net.sf.urlchecker.v2.communication.configurers
java.io
java.lang
java.text
java.util
java.util.regex
javax.net.ssl
net.sf.urlchecker.communication
net.sf.urlchecker.communication.configurers
net.sf.urlchecker.v2.communication.configurers
org.apache.commons.configuration
org.apache.commons.httpclient
org.apache.http
org.apache.http.client
org.apache.http.client.methods
org.apache.http.conn
org.apache.http.impl.client
org.apache.http.protocol
org.apache.log4j

net.sf.urlchecker.v2.communication.configurers

Afferent Couplings Efferent Couplings Abstractness Instability Distance
1 18 0.0% 95.0% 5.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
None net.sf.urlchecker.v2.communication.configurers.ClientConfigurer
net.sf.urlchecker.v2.communication.configurers.ContextConfigurer
net.sf.urlchecker.v2.communication.configurers.MethodsConfigurer
net.sf.urlchecker.v2.communication
java.lang
java.util
net.sf.urlchecker.communication.configurers
net.sf.urlchecker.v2.communication
org.apache.commons.configuration
org.apache.http
org.apache.http.auth
org.apache.http.client
org.apache.http.conn
org.apache.http.conn.params
org.apache.http.conn.scheme
org.apache.http.conn.ssl
org.apache.http.impl.client
org.apache.http.impl.conn
org.apache.http.impl.conn.tsccm
org.apache.http.params
org.apache.http.protocol
org.apache.log4j

net.sf.urlchecker.v2.exception.handling

Afferent Couplings Efferent Couplings Abstractness Instability Distance
0 4 0.0% 100.0% 0.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
None net.sf.urlchecker.v2.exception.handling.AlwaysFalse
net.sf.urlchecker.v2.exception.handling.AlwaysTrue
None java.io
java.lang
net.sf.urlchecker.exception.handling
org.apache.http.protocol

Cycles

[ summary ] [ packages ] [ cycles ] [ explanations ]

Package Package Dependencies
net.sf.urlchecker.commands net.sf.urlchecker.events
net.sf.urlchecker.commands
net.sf.urlchecker.communication net.sf.urlchecker.commands
net.sf.urlchecker.events
net.sf.urlchecker.commands
net.sf.urlchecker.communication.configurers net.sf.urlchecker.communication
net.sf.urlchecker.commands
net.sf.urlchecker.events
net.sf.urlchecker.commands
net.sf.urlchecker.events net.sf.urlchecker.commands
net.sf.urlchecker.events
net.sf.urlchecker.v2.commands net.sf.urlchecker.commands
net.sf.urlchecker.events
net.sf.urlchecker.commands
net.sf.urlchecker.v2.communication net.sf.urlchecker.communication
net.sf.urlchecker.commands
net.sf.urlchecker.events
net.sf.urlchecker.commands
net.sf.urlchecker.v2.communication.configurers net.sf.urlchecker.v2.communication
net.sf.urlchecker.communication
net.sf.urlchecker.commands
net.sf.urlchecker.events
net.sf.urlchecker.commands

Explanation

[ summary ] [ packages ] [ cycles ] [ explanations ]

The following explanations are for quick reference and are lifted directly from the original JDepend documentation.

Term Description
Number of Classes The number of concrete and abstract classes (and interfaces) in the package is an indicator of the extensibility of the package.
Afferent Couplings The number of other packages that depend upon classes within the package is an indicator of the package's responsibility.
Efferent Couplings The number of other packages that the classes in the package depend upon is an indicator of the package's independence.
Abstractness The ratio of the number of abstract classes (and interfaces) in the analyzed package to the total number of classes in the analyzed package. The range for this metric is 0 to 1, with A=0 indicating a completely concrete package and A=1 indicating a completely abstract package.
Instability The ratio of efferent coupling (Ce) to total coupling (Ce / (Ce + Ca)). This metric is an indicator of the package's resilience to change. The range for this metric is 0 to 1, with I=0 indicating a completely stable package and I=1 indicating a completely instable package.
Distance The perpendicular distance of a package from the idealized line A + I = 1. This metric is an indicator of the package's balance between abstractness and stability. A package squarely on the main sequence is optimally balanced with respect to its abstractness and stability. Ideal packages are either completely abstract and stable (x=0, y=1) or completely concrete and instable (x=1, y=0). The range for this metric is 0 to 1, with D=0 indicating a package that is coincident with the main sequence and D=1 indicating a package that is as far from the main sequence as possible.
Cycles Packages participating in a package dependency cycle are in a deadly embrace with respect to reusability and their release cycle. Package dependency cycles can be easily identified by reviewing the textual reports of dependency cycles. Once these dependency cycles have been identified with JDepend, they can be broken by employing various object-oriented techniques.