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.discovery 10 4 6 6 7 60.000004% 54.000004% 14.0% 1
org.apache.commons.discovery.ant 1 1 0 0 6 0.0% 100.0% 0.0% 1
org.apache.commons.discovery.jdk 7 6 1 3 7 14.0% 70.0% 16.0% 1
org.apache.commons.discovery.log 2 2 0 6 8 0.0% 57.0% 43.0% 1
org.apache.commons.discovery.resource 5 4 1 4 9 20.0% 69.0% 11.0% 1
org.apache.commons.discovery.resource.classes 4 3 1 1 6 25.0% 86.0% 11.0% 1
org.apache.commons.discovery.resource.names 17 16 1 2 8 6.0% 80.0% 14.0% 1
org.apache.commons.discovery.tools 13 13 0 2 12 0.0% 86.0% 14.0% 1

Packages

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

org.apache.commons.discovery

Afferent Couplings Efferent Couplings Abstractness Instability Distance
6 7 60.000004% 54.000004% 14.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
org.apache.commons.discovery.ResourceClassDiscover
org.apache.commons.discovery.ResourceClassIterator
org.apache.commons.discovery.ResourceDiscover
org.apache.commons.discovery.ResourceIterator
org.apache.commons.discovery.ResourceNameDiscover
org.apache.commons.discovery.ResourceNameIterator
 org.apache.commons.discovery.DiscoveryException
org.apache.commons.discovery.Resource
org.apache.commons.discovery.ResourceClass
org.apache.commons.discovery.ResourceClass$1
 org.apache.commons.discovery.ant
org.apache.commons.discovery.log
org.apache.commons.discovery.resource
org.apache.commons.discovery.resource.classes
org.apache.commons.discovery.resource.names
org.apache.commons.discovery.tools
 java.io
java.lang
java.net
java.security
java.util
org.apache.commons.discovery.log
org.apache.commons.logging

org.apache.commons.discovery.ant

Afferent Couplings Efferent Couplings Abstractness Instability Distance
0 6 0.0% 100.0% 0.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
None org.apache.commons.discovery.ant.ServiceDiscoveryTask
 None java.io
java.lang
java.util
org.apache.commons.discovery
org.apache.commons.discovery.jdk
org.apache.commons.discovery.resource

org.apache.commons.discovery.jdk

Afferent Couplings Efferent Couplings Abstractness Instability Distance
3 7 14.0% 70.0% 16.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
org.apache.commons.discovery.jdk.JDKHooks
 org.apache.commons.discovery.jdk.JDK11Hooks
org.apache.commons.discovery.jdk.JDK11Hooks$1
org.apache.commons.discovery.jdk.JDK12Hooks
org.apache.commons.discovery.jdk.JDK12Hooks$1
org.apache.commons.discovery.jdk.JDK12Hooks$2
org.apache.commons.discovery.jdk.PsuedoSystemClassLoader
 org.apache.commons.discovery.ant
org.apache.commons.discovery.resource
org.apache.commons.discovery.tools
 java.io
java.lang
java.net
java.security
java.util
org.apache.commons.discovery.log
org.apache.commons.logging

org.apache.commons.discovery.log

Afferent Couplings Efferent Couplings Abstractness Instability Distance
6 8 0.0% 57.0% 43.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
None org.apache.commons.discovery.log.DiscoveryLogFactory
org.apache.commons.discovery.log.SimpleLog
 org.apache.commons.discovery
org.apache.commons.discovery.jdk
org.apache.commons.discovery.resource
org.apache.commons.discovery.resource.classes
org.apache.commons.discovery.resource.names
org.apache.commons.discovery.tools
 java.io
java.lang
java.lang.reflect
java.text
java.util
org.apache.commons.discovery
org.apache.commons.discovery.tools
org.apache.commons.logging

org.apache.commons.discovery.resource

Afferent Couplings Efferent Couplings Abstractness Instability Distance
4 9 20.0% 69.0% 11.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
org.apache.commons.discovery.resource.ResourceDiscoverImpl
 org.apache.commons.discovery.resource.ClassLoaders
org.apache.commons.discovery.resource.DiscoverResources
org.apache.commons.discovery.resource.DiscoverResources$1
org.apache.commons.discovery.resource.ResourceDiscoverImpl$1
 org.apache.commons.discovery.ant
org.apache.commons.discovery.resource.classes
org.apache.commons.discovery.resource.names
org.apache.commons.discovery.tools
 java.io
java.lang
java.net
java.util
org.apache.commons.discovery
org.apache.commons.discovery.jdk
org.apache.commons.discovery.log
org.apache.commons.discovery.resource.names
org.apache.commons.logging

org.apache.commons.discovery.resource.classes

Afferent Couplings Efferent Couplings Abstractness Instability Distance
1 6 25.0% 86.0% 11.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
org.apache.commons.discovery.resource.classes.ResourceClassDiscoverImpl
 org.apache.commons.discovery.resource.classes.DiscoverClasses
org.apache.commons.discovery.resource.classes.DiscoverClasses$1
org.apache.commons.discovery.resource.classes.ResourceClassDiscoverImpl$1
 org.apache.commons.discovery.tools
 java.lang
java.util
org.apache.commons.discovery
org.apache.commons.discovery.log
org.apache.commons.discovery.resource
org.apache.commons.logging

org.apache.commons.discovery.resource.names

Afferent Couplings Efferent Couplings Abstractness Instability Distance
2 8 6.0% 80.0% 14.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
org.apache.commons.discovery.resource.names.ResourceNameDiscoverImpl
 org.apache.commons.discovery.resource.names.DiscoverMappedNames
org.apache.commons.discovery.resource.names.DiscoverMappedNames$1
org.apache.commons.discovery.resource.names.DiscoverNamesInAlternateManagedProperties
org.apache.commons.discovery.resource.names.DiscoverNamesInAlternateManagedProperties$1
org.apache.commons.discovery.resource.names.DiscoverNamesInDictionary
org.apache.commons.discovery.resource.names.DiscoverNamesInDictionary$1
org.apache.commons.discovery.resource.names.DiscoverNamesInFile
org.apache.commons.discovery.resource.names.DiscoverNamesInFile$1
org.apache.commons.discovery.resource.names.DiscoverNamesInManagedProperties
org.apache.commons.discovery.resource.names.DiscoverNamesInManagedProperties$1
org.apache.commons.discovery.resource.names.DiscoverNamesInSystemProperties
org.apache.commons.discovery.resource.names.DiscoverNamesInSystemProperties$1
org.apache.commons.discovery.resource.names.DiscoverServiceNames
org.apache.commons.discovery.resource.names.NameDiscoverers
org.apache.commons.discovery.resource.names.NameDiscoverers$1
org.apache.commons.discovery.resource.names.ResourceNameDiscoverImpl$1
 org.apache.commons.discovery.resource
org.apache.commons.discovery.tools
 java.io
java.lang
java.util
org.apache.commons.discovery
org.apache.commons.discovery.log
org.apache.commons.discovery.resource
org.apache.commons.discovery.tools
org.apache.commons.logging

org.apache.commons.discovery.tools

Afferent Couplings Efferent Couplings Abstractness Instability Distance
2 12 0.0% 86.0% 14.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
None org.apache.commons.discovery.tools.ClassUtils
org.apache.commons.discovery.tools.DefaultClassHolder
org.apache.commons.discovery.tools.DiscoverClass
org.apache.commons.discovery.tools.DiscoverSingleton
org.apache.commons.discovery.tools.EnvironmentCache
org.apache.commons.discovery.tools.ManagedProperties
org.apache.commons.discovery.tools.ManagedProperties$1
org.apache.commons.discovery.tools.ManagedProperties$Value
org.apache.commons.discovery.tools.PropertiesHolder
org.apache.commons.discovery.tools.ResourceUtils
org.apache.commons.discovery.tools.SPInterface
org.apache.commons.discovery.tools.Service
org.apache.commons.discovery.tools.Service$1
 org.apache.commons.discovery.log
org.apache.commons.discovery.resource.names
 java.io
java.lang
java.lang.reflect
java.security
java.util
org.apache.commons.discovery
org.apache.commons.discovery.jdk
org.apache.commons.discovery.log
org.apache.commons.discovery.resource
org.apache.commons.discovery.resource.classes
org.apache.commons.discovery.resource.names
org.apache.commons.logging

Cycles

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

Package Package Dependencies
org.apache.commons.discovery org.apache.commons.discovery.log
org.apache.commons.discovery.tools
org.apache.commons.discovery.log
org.apache.commons.discovery.ant org.apache.commons.discovery.jdk
org.apache.commons.discovery.log
org.apache.commons.discovery.tools
org.apache.commons.discovery.log
org.apache.commons.discovery.jdk org.apache.commons.discovery.log
org.apache.commons.discovery.tools
org.apache.commons.discovery.log
org.apache.commons.discovery.log org.apache.commons.discovery.tools
org.apache.commons.discovery.log
org.apache.commons.discovery.resource org.apache.commons.discovery.jdk
org.apache.commons.discovery.log
org.apache.commons.discovery.tools
org.apache.commons.discovery.log
org.apache.commons.discovery.resource.classes org.apache.commons.discovery.resource
org.apache.commons.discovery.jdk
org.apache.commons.discovery.log
org.apache.commons.discovery.tools
org.apache.commons.discovery.log
org.apache.commons.discovery.resource.names org.apache.commons.discovery
org.apache.commons.discovery.log
org.apache.commons.discovery.tools
org.apache.commons.discovery.log
org.apache.commons.discovery.tools org.apache.commons.discovery.log
org.apache.commons.discovery.tools

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.