Simple Web Spider - JDepend Report Metrics

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
simplespider.simplespider	3	3	0	0	14	0.0%	100.0%	0.0%	1
simplespider.simplespider.bot	3	2	1	1	12	33.0%	92.0%	26.0%	1
simplespider.simplespider.bot.extractor	1	0	1	2	3	100.0%	60.000004%	60.000004%	1
simplespider.simplespider.bot.extractor.html.stream	5	4	1	1	7	20.0%	88.0%	8.0%	1
simplespider.simplespider.bot.http	2	0	2	3	3	100.0%	50.0%	50.0%	1
simplespider.simplespider.bot.http.apache	2	2	0	1	9	0.0%	90.0%	10.0%	1
simplespider.simplespider.bot.http.apache.ssl	4	4	0	1	11	0.0%	92.0%	8.0%	1
simplespider.simplespider.dao	3	0	3	5	2	100.0%	29.0%	29.0%	1
simplespider.simplespider.dao.db4o	7	7	0	1	17	0.0%	94.0%	6.0%	1
simplespider.simplespider.importing	1	0	1	2	2	100.0%	50.0%	50.0%	1
simplespider.simplespider.importing.simplefile	1	1	0	1	7	0.0%	88.0%	12.0%	1
simplespider.simplespider.util	7	7	0	4	7	0.0%	64.0%	36.0%	1

Packages

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

simplespider.simplespider

Afferent Couplings	Efferent Couplings	Abstractness	Instability	Distance
0	14	0.0%	100.0%	0.0%

Abstract Classes	Concrete Classes	Used by Packages	Uses Packages
None	simplespider.simplespider.LimitThroughPut simplespider.simplespider.Main simplespider.simplespider.Main$1	None	java.io java.lang java.sql java.util java.util.concurrent org.apache.commons.logging simplespider.simplespider.bot simplespider.simplespider.bot.extractor.html.stream simplespider.simplespider.bot.http simplespider.simplespider.bot.http.apache simplespider.simplespider.dao simplespider.simplespider.dao.db4o simplespider.simplespider.importing simplespider.simplespider.importing.simplefile

simplespider.simplespider.bot

Afferent Couplings	Efferent Couplings	Abstractness	Instability	Distance
1	12	33.0%	92.0%	26.0%

Abstract Classes	Concrete Classes	Used by Packages	Uses Packages
simplespider.simplespider.bot.Crawler	simplespider.simplespider.bot.CrawlerImpl simplespider.simplespider.bot.CrawlerRunner	simplespider.simplespider	java.io java.lang java.net java.sql java.util java.util.concurrent org.apache.commons.httpclient org.apache.commons.logging simplespider.simplespider.bot.extractor simplespider.simplespider.bot.http simplespider.simplespider.dao simplespider.simplespider.util

simplespider.simplespider.bot.extractor

Afferent Couplings	Efferent Couplings	Abstractness	Instability	Distance
2	3	100.0%	60.000004%	60.000004%

Abstract Classes	Concrete Classes	Used by Packages	Uses Packages
simplespider.simplespider.bot.extractor.LinkExtractor	None	simplespider.simplespider.bot simplespider.simplespider.bot.extractor.html.stream	java.io java.lang java.util

simplespider.simplespider.bot.extractor.html.stream

Afferent Couplings	Efferent Couplings	Abstractness	Instability	Distance
1	7	20.0%	88.0%	8.0%

Abstract Classes	Concrete Classes	Used by Packages	Uses Packages
simplespider.simplespider.bot.extractor.html.stream.TagListener	simplespider.simplespider.bot.extractor.html.stream.HtmlWriter simplespider.simplespider.bot.extractor.html.stream.StreamExtractor simplespider.simplespider.bot.extractor.html.stream.TagListenerImpl simplespider.simplespider.bot.extractor.html.stream.TagWriter	simplespider.simplespider	java.io java.lang java.net java.util org.apache.commons.logging simplespider.simplespider.bot.extractor simplespider.simplespider.util

simplespider.simplespider.bot.http

Afferent Couplings	Efferent Couplings	Abstractness	Instability	Distance
3	3	100.0%	50.0%	50.0%

Abstract Classes	Concrete Classes	Used by Packages	Uses Packages
simplespider.simplespider.bot.http.HttpClient simplespider.simplespider.bot.http.HttpClientFactory	None	simplespider.simplespider simplespider.simplespider.bot simplespider.simplespider.bot.http.apache	java.io java.lang org.apache.commons.httpclient

simplespider.simplespider.bot.http.apache

Afferent Couplings	Efferent Couplings	Abstractness	Instability	Distance
1	9	0.0%	90.0%	10.0%

Abstract Classes	Concrete Classes	Used by Packages	Uses Packages
None	simplespider.simplespider.bot.http.apache.ApacheHttpClient simplespider.simplespider.bot.http.apache.ApacheHttpClientFactory	simplespider.simplespider	java.io java.lang org.apache.commons.httpclient org.apache.commons.httpclient.methods org.apache.commons.httpclient.params org.apache.commons.httpclient.protocol simplespider.simplespider.bot.http simplespider.simplespider.bot.http.apache.ssl simplespider.simplespider.util

simplespider.simplespider.bot.http.apache.ssl

Afferent Couplings	Efferent Couplings	Abstractness	Instability	Distance
1	11	0.0%	92.0%	8.0%

Abstract Classes	Concrete Classes	Used by Packages	Uses Packages
None	simplespider.simplespider.bot.http.apache.ssl.EasySSLProtocolSocketFactory simplespider.simplespider.bot.http.apache.ssl.EasyX509TrustManager simplespider.simplespider.bot.http.apache.ssl.TrustAllSSLProtocolSocketFactory simplespider.simplespider.bot.http.apache.ssl.TrustAllX509TrustManager	simplespider.simplespider.bot.http.apache	java.io java.lang java.net java.security java.security.cert javax.net javax.net.ssl org.apache.commons.httpclient org.apache.commons.httpclient.params org.apache.commons.httpclient.protocol org.apache.commons.logging

simplespider.simplespider.dao

Afferent Couplings	Efferent Couplings	Abstractness	Instability	Distance
5	2	100.0%	29.0%	29.0%

Abstract Classes	Concrete Classes	Used by Packages	Uses Packages
simplespider.simplespider.dao.DbHelper simplespider.simplespider.dao.DbHelperFactory simplespider.simplespider.dao.LinkDao	None	simplespider.simplespider simplespider.simplespider.bot simplespider.simplespider.dao.db4o simplespider.simplespider.importing simplespider.simplespider.importing.simplefile	java.lang java.sql

simplespider.simplespider.dao.db4o

Afferent Couplings	Efferent Couplings	Abstractness	Instability	Distance
1	17	0.0%	94.0%	6.0%

Abstract Classes	Concrete Classes	Used by Packages	Uses Packages
None	simplespider.simplespider.dao.db4o.Db4oDbHelper simplespider.simplespider.dao.db4o.Db4oDbHelperFactory simplespider.simplespider.dao.db4o.Db4oDbHelperFactory$1 simplespider.simplespider.dao.db4o.Db4oLinkDao simplespider.simplespider.dao.db4o.Hash simplespider.simplespider.dao.db4o.Link simplespider.simplespider.dao.db4o.MD5	simplespider.simplespider	com.db4o com.db4o.config com.db4o.constraints com.db4o.cs com.db4o.cs.config com.db4o.defragment com.db4o.diagnostic com.db4o.ext com.db4o.query com.db4o.reflect java.io java.lang java.security java.sql java.util org.apache.commons.logging simplespider.simplespider.dao

simplespider.simplespider.importing

Afferent Couplings	Efferent Couplings	Abstractness	Instability	Distance
2	2	100.0%	50.0%	50.0%

Abstract Classes	Concrete Classes	Used by Packages	Uses Packages
simplespider.simplespider.importing.EntityImporter	None	simplespider.simplespider simplespider.simplespider.importing.simplefile	java.lang simplespider.simplespider.dao

simplespider.simplespider.importing.simplefile

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	simplespider.simplespider.importing.simplefile.SimpleFileImporter	simplespider.simplespider	java.io java.lang java.sql org.apache.commons.logging simplespider.simplespider.dao simplespider.simplespider.importing simplespider.simplespider.util

simplespider.simplespider.util

Afferent Couplings	Efferent Couplings	Abstractness	Instability	Distance
4	7	0.0%	64.0%	36.0%

Abstract Classes	Concrete Classes	Used by Packages	Uses Packages
None	simplespider.simplespider.util.MD5 simplespider.simplespider.util.MD5$1 simplespider.simplespider.util.Punycode simplespider.simplespider.util.Punycode$PunycodeException simplespider.simplespider.util.SimpleUrl simplespider.simplespider.util.StringUtils simplespider.simplespider.util.ValidityHelper	simplespider.simplespider.bot simplespider.simplespider.bot.extractor.html.stream simplespider.simplespider.bot.http.apache simplespider.simplespider.importing.simplefile	java.io java.lang java.net java.security java.util java.util.regex org.apache.commons.logging

Cycles

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

There are no cyclic dependencies.

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.

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