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.fileupload 33 23 10 4 7 30.000002% 64.0% 6.0% 1
org.apache.commons.fileupload.disk 2 2 0 1 8 0.0% 89.0% 11.0% 1
org.apache.commons.fileupload.portlet 2 2 0 0 5 0.0% 100.0% 0.0% 1
org.apache.commons.fileupload.servlet 3 3 0 1 7 0.0% 88.0% 12.0% 1
org.apache.commons.fileupload.util 4 2 2 2 4 50.0% 67.0% 17.0% 1

Packages

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

org.apache.commons.fileupload

Afferent Couplings Efferent Couplings Abstractness Instability Distance
4 7 30.000002% 64.0% 6.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
org.apache.commons.fileupload.FileItem
org.apache.commons.fileupload.FileItemFactory
org.apache.commons.fileupload.FileItemHeaders
org.apache.commons.fileupload.FileItemHeadersSupport
org.apache.commons.fileupload.FileItemIterator
org.apache.commons.fileupload.FileItemStream
org.apache.commons.fileupload.FileUploadBase
org.apache.commons.fileupload.FileUploadBase$SizeException
org.apache.commons.fileupload.ProgressListener
org.apache.commons.fileupload.RequestContext
 org.apache.commons.fileupload.DefaultFileItem
org.apache.commons.fileupload.DefaultFileItemFactory
org.apache.commons.fileupload.DiskFileUpload
org.apache.commons.fileupload.FileItemStream$ItemSkippedException
org.apache.commons.fileupload.FileUpload
org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl
org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl$1
org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl$FileItemStreamImpl
org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl$FileItemStreamImpl$1
org.apache.commons.fileupload.FileUploadBase$FileSizeLimitExceededException
org.apache.commons.fileupload.FileUploadBase$FileUploadIOException
org.apache.commons.fileupload.FileUploadBase$IOFileUploadException
org.apache.commons.fileupload.FileUploadBase$InvalidContentTypeException
org.apache.commons.fileupload.FileUploadBase$SizeLimitExceededException
org.apache.commons.fileupload.FileUploadBase$UnknownSizeException
org.apache.commons.fileupload.FileUploadException
org.apache.commons.fileupload.InvalidFileNameException
org.apache.commons.fileupload.MultipartStream
org.apache.commons.fileupload.MultipartStream$IllegalBoundaryException
org.apache.commons.fileupload.MultipartStream$ItemInputStream
org.apache.commons.fileupload.MultipartStream$MalformedStreamException
org.apache.commons.fileupload.MultipartStream$ProgressNotifier
org.apache.commons.fileupload.ParameterParser
 org.apache.commons.fileupload.disk
org.apache.commons.fileupload.portlet
org.apache.commons.fileupload.servlet
org.apache.commons.fileupload.util
 java.io
java.lang
java.util
javax.servlet.http
org.apache.commons.fileupload.disk
org.apache.commons.fileupload.servlet
org.apache.commons.fileupload.util

org.apache.commons.fileupload.disk

Afferent Couplings Efferent Couplings Abstractness Instability Distance
1 8 0.0% 89.0% 11.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
None org.apache.commons.fileupload.disk.DiskFileItem
org.apache.commons.fileupload.disk.DiskFileItemFactory
 org.apache.commons.fileupload
 java.io
java.lang
java.rmi.server
java.util
org.apache.commons.fileupload
org.apache.commons.fileupload.util
org.apache.commons.io
org.apache.commons.io.output

org.apache.commons.fileupload.portlet

Afferent Couplings Efferent Couplings Abstractness Instability Distance
0 5 0.0% 100.0% 0.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
None org.apache.commons.fileupload.portlet.PortletFileUpload
org.apache.commons.fileupload.portlet.PortletRequestContext
 None java.io
java.lang
java.util
javax.portlet
org.apache.commons.fileupload

org.apache.commons.fileupload.servlet

Afferent Couplings Efferent Couplings Abstractness Instability Distance
1 7 0.0% 88.0% 12.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
None org.apache.commons.fileupload.servlet.FileCleanerCleanup
org.apache.commons.fileupload.servlet.ServletFileUpload
org.apache.commons.fileupload.servlet.ServletRequestContext
 org.apache.commons.fileupload
 java.io
java.lang
java.util
javax.servlet
javax.servlet.http
org.apache.commons.fileupload
org.apache.commons.io

org.apache.commons.fileupload.util

Afferent Couplings Efferent Couplings Abstractness Instability Distance
2 4 50.0% 67.0% 17.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
org.apache.commons.fileupload.util.Closeable
org.apache.commons.fileupload.util.LimitedInputStream
 org.apache.commons.fileupload.util.FileItemHeadersImpl
org.apache.commons.fileupload.util.Streams
 org.apache.commons.fileupload
org.apache.commons.fileupload.disk
 java.io
java.lang
java.util
org.apache.commons.fileupload

Cycles

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

Package Package Dependencies
org.apache.commons.fileupload org.apache.commons.fileupload.disk
org.apache.commons.fileupload.util
org.apache.commons.fileupload
org.apache.commons.fileupload.disk org.apache.commons.fileupload.util
org.apache.commons.fileupload
org.apache.commons.fileupload.disk
org.apache.commons.fileupload.portlet org.apache.commons.fileupload
org.apache.commons.fileupload.disk
org.apache.commons.fileupload.util
org.apache.commons.fileupload
org.apache.commons.fileupload.servlet org.apache.commons.fileupload
org.apache.commons.fileupload.disk
org.apache.commons.fileupload.util
org.apache.commons.fileupload
org.apache.commons.fileupload.util org.apache.commons.fileupload
org.apache.commons.fileupload.disk
org.apache.commons.fileupload.util

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.