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.id 11 6 5 4 4 45.0% 50.0% 5.0% 1
org.apache.commons.id.random 1 1 0 0 4 0.0% 100.0% 0.0% 1
org.apache.commons.id.serial 7 7 0 0 4 0.0% 100.0% 0.0% 1
org.apache.commons.id.uuid 8 6 2 2 8 25.0% 80.0% 5.0% 1
org.apache.commons.id.uuid.clock 4 3 1 2 2 25.0% 50.0% 25.0% 1
org.apache.commons.id.uuid.state 7 6 1 1 11 14.0% 92.0% 6.0% 1
org.apache.commons.id.uuid.task 2 2 0 0 4 0.0% 100.0% 0.0% 1

Packages

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

org.apache.commons.id

Afferent Couplings Efferent Couplings Abstractness Instability Distance
4 4 45.0% 50.0% 5.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
org.apache.commons.id.AbstractLongIdentifierGenerator
org.apache.commons.id.AbstractStringIdentifierGenerator
org.apache.commons.id.IdentifierGenerator
org.apache.commons.id.LongIdentifierGenerator
org.apache.commons.id.StringIdentifierGenerator
 org.apache.commons.id.CompositeIdentifierGenerator
org.apache.commons.id.ConstantIdentifierGenerator
org.apache.commons.id.DecoderException
org.apache.commons.id.DigestUtils
org.apache.commons.id.EncoderException
org.apache.commons.id.Hex
 org.apache.commons.id.random
org.apache.commons.id.serial
org.apache.commons.id.uuid
org.apache.commons.id.uuid.state
 java.io
java.lang
java.security
java.util

org.apache.commons.id.random

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 org.apache.commons.id.random.SessionIdGenerator
 None java.io
java.lang
java.util
org.apache.commons.id

org.apache.commons.id.serial

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 org.apache.commons.id.serial.AlphanumericGenerator
org.apache.commons.id.serial.LongGenerator
org.apache.commons.id.serial.NumericGenerator
org.apache.commons.id.serial.PrefixedAlphanumericGenerator
org.apache.commons.id.serial.PrefixedLeftPaddedNumericGenerator
org.apache.commons.id.serial.PrefixedNumericGenerator
org.apache.commons.id.serial.TimeBasedAlphanumericIdentifierGenerator
 None java.io
java.lang
java.util
org.apache.commons.id

org.apache.commons.id.uuid

Afferent Couplings Efferent Couplings Abstractness Instability Distance
2 8 25.0% 80.0% 5.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
org.apache.commons.id.uuid.Constants
org.apache.commons.id.uuid.NodeManager
 org.apache.commons.id.uuid.Bytes
org.apache.commons.id.uuid.NodeManagerImpl
org.apache.commons.id.uuid.UUID
org.apache.commons.id.uuid.UUIDFormatException
org.apache.commons.id.uuid.VersionFourGenerator
org.apache.commons.id.uuid.VersionOneGenerator
 org.apache.commons.id.uuid.state
org.apache.commons.id.uuid.task
 java.io
java.lang
java.security
java.util
org.apache.commons.discovery.tools
org.apache.commons.id
org.apache.commons.id.uuid.clock
org.apache.commons.id.uuid.state

org.apache.commons.id.uuid.clock

Afferent Couplings Efferent Couplings Abstractness Instability Distance
2 2 25.0% 50.0% 25.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
org.apache.commons.id.uuid.clock.Clock
 org.apache.commons.id.uuid.clock.OverClockedException
org.apache.commons.id.uuid.clock.SystemClockImpl
org.apache.commons.id.uuid.clock.ThreadClockImpl
 org.apache.commons.id.uuid
org.apache.commons.id.uuid.state
 java.io
java.lang

org.apache.commons.id.uuid.state

Afferent Couplings Efferent Couplings Abstractness Instability Distance
1 11 14.0% 92.0% 6.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
org.apache.commons.id.uuid.state.State
 org.apache.commons.id.uuid.state.InMemoryStateImpl
org.apache.commons.id.uuid.state.Node
org.apache.commons.id.uuid.state.ReadOnlyResourceStateImpl
org.apache.commons.id.uuid.state.ReadOnlyResourceStateImpl$StateConfigHandler
org.apache.commons.id.uuid.state.ReadWriteFileStateImpl
org.apache.commons.id.uuid.state.StateHelper
 org.apache.commons.id.uuid
 java.io
java.lang
java.net
java.util
javax.xml.parsers
org.apache.commons.discovery.tools
org.apache.commons.id
org.apache.commons.id.uuid
org.apache.commons.id.uuid.clock
org.xml.sax
org.xml.sax.helpers

org.apache.commons.id.uuid.task

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 org.apache.commons.id.uuid.task.UUIDTask
org.apache.commons.id.uuid.task.UUIDTask$UUIDVersion
 None java.lang
org.apache.commons.id.uuid
org.apache.tools.ant
org.apache.tools.ant.types

Cycles

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

Package Package Dependencies
org.apache.commons.id.uuid org.apache.commons.id.uuid.state
org.apache.commons.id.uuid
org.apache.commons.id.uuid.state org.apache.commons.id.uuid
org.apache.commons.id.uuid.state
org.apache.commons.id.uuid.task org.apache.commons.id.uuid
org.apache.commons.id.uuid.state
org.apache.commons.id.uuid

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.