## 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 | 34 | 23 | 11 | 4 | 9 | 32.0% | 69.0% | 2.0% | 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 | 5 | 50.0% | 71.0% | 21.0% | 1
org.apache.commons.fileupload.util.mime | 4 | 4 | 0 | 1 | 3 | 0.0% | 75.0% | 25.0% | 1
## Packages [ summary ] [ packages ] [ cycles ] [ explanations ] ### org.apache.commons.fileupload
Afferent Couplings | Efferent Couplings | Abstractness | Instability | Distance
--- | --- | --- | --- | ---
4 | 9 | 32.0% | 69.0% | 2.0%
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$SizeException org.apache.commons.fileupload.ProgressListener org.apache.commons.fileupload.RequestContext org.apache.commons.fileupload.UploadContext | org.apache.commons.fileupload.DefaultFileItem org.apache.commons.fileupload.DefaultFileItemFactory org.apache.commons.fileupload.DiskFileUpload org.apache.commons.fileupload.FileItemStream$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.util.mime org.apache.commons.io
### 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.util java.util.concurrent.atomic 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 | 5 | 50.0% | 71.0% | 21.0%
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 org.apache.commons.io
### org.apache.commons.fileupload.util.mime
Afferent Couplings | Efferent Couplings | Abstractness | Instability | Distance
--- | --- | --- | --- | ---
1 | 3 | 0.0% | 75.0% | 25.0%
Abstract Classes | Concrete Classes | Used by Packages | Uses Packages
--- | --- | --- | ---
None | org.apache.commons.fileupload.util.mime.Base64Decoder org.apache.commons.fileupload.util.mime.MimeUtility org.apache.commons.fileupload.util.mime.ParseException org.apache.commons.fileupload.util.mime.QuotedPrintableDecoder | org.apache.commons.fileupload | java.io java.lang java.util
## 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.