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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
org.apache.commons.exec 22 16 6 2 5 27.000002% 71.0% 1.0% 1
org.apache.commons.exec.environment 4 4 0 1 4 0.0% 80.0% 20.0% 1
org.apache.commons.exec.launcher 8 5 3 1 6 38.0% 86.0% 23.0% 1
org.apache.commons.exec.util 3 3 0 2 3 0.0% 60.000004% 40.0% 1

Packages

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

org.apache.commons.exec

Afferent Couplings Efferent Couplings Abstractness Instability Distance
2 5 27.000002% 71.0% 1.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
org.apache.commons.exec.ExecuteResultHandler
org.apache.commons.exec.ExecuteStreamHandler
org.apache.commons.exec.Executor
org.apache.commons.exec.LogOutputStream
org.apache.commons.exec.ProcessDestroyer
org.apache.commons.exec.TimeoutObserver
org.apache.commons.exec.CommandLine
org.apache.commons.exec.CommandLine$1
org.apache.commons.exec.CommandLine$Argument
org.apache.commons.exec.DaemonExecutor
org.apache.commons.exec.DefaultExecuteResultHandler
org.apache.commons.exec.DefaultExecutor
org.apache.commons.exec.DefaultExecutor$1
org.apache.commons.exec.ExecuteException
org.apache.commons.exec.ExecuteWatchdog
org.apache.commons.exec.InputStreamPumper
org.apache.commons.exec.OS
org.apache.commons.exec.PumpStreamHandler
org.apache.commons.exec.ShutdownHookProcessDestroyer
org.apache.commons.exec.ShutdownHookProcessDestroyer$ProcessDestroyerImpl
org.apache.commons.exec.StreamPumper
org.apache.commons.exec.Watchdog
org.apache.commons.exec.environment
org.apache.commons.exec.launcher
java.io
java.lang
java.util
org.apache.commons.exec.launcher
org.apache.commons.exec.util

org.apache.commons.exec.environment

Afferent Couplings Efferent Couplings Abstractness Instability Distance
1 4 0.0% 80.0% 20.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
None org.apache.commons.exec.environment.DefaultProcessingEnvironment
org.apache.commons.exec.environment.DefaultProcessingEnvironment$1
org.apache.commons.exec.environment.EnvironmentUtils
org.apache.commons.exec.environment.OpenVmsProcessingEnvironment
org.apache.commons.exec.launcher
java.io
java.lang
java.util
org.apache.commons.exec

org.apache.commons.exec.launcher

Afferent Couplings Efferent Couplings Abstractness Instability Distance
1 6 38.0% 86.0% 23.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
org.apache.commons.exec.launcher.CommandLauncher
org.apache.commons.exec.launcher.CommandLauncherImpl
org.apache.commons.exec.launcher.CommandLauncherProxy
org.apache.commons.exec.launcher.CommandLauncherFactory
org.apache.commons.exec.launcher.Java13CommandLauncher
org.apache.commons.exec.launcher.OS2CommandLauncher
org.apache.commons.exec.launcher.VmsCommandLauncher
org.apache.commons.exec.launcher.WinNTCommandLauncher
org.apache.commons.exec
java.io
java.lang
java.util
org.apache.commons.exec
org.apache.commons.exec.environment
org.apache.commons.exec.util

org.apache.commons.exec.util

Afferent Couplings Efferent Couplings Abstractness Instability Distance
2 3 0.0% 60.000004% 40.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
None org.apache.commons.exec.util.DebugUtils
org.apache.commons.exec.util.MapUtils
org.apache.commons.exec.util.StringUtils
org.apache.commons.exec
org.apache.commons.exec.launcher
java.io
java.lang
java.util

Cycles

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

Package Package Dependencies
org.apache.commons.exec org.apache.commons.exec.launcher
org.apache.commons.exec
org.apache.commons.exec.environment org.apache.commons.exec
org.apache.commons.exec.launcher
org.apache.commons.exec
org.apache.commons.exec.launcher org.apache.commons.exec
org.apache.commons.exec.launcher

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.