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.shardingsphere.distsql.parser.autogen 13 12 1 1 6 8.0% 86.0% 7.0% 1
org.apache.shardingsphere.parser.distsql.parser.core 3 3 0 1 12 0.0% 92.0% 8.0% 1
org.apache.shardingsphere.parser.distsql.parser.facade 1 1 0 0 3 0.0% 100.0% 0.0% 1

Packages

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

org.apache.shardingsphere.distsql.parser.autogen

Afferent Couplings Efferent Couplings Abstractness Instability Distance
1 6 8.0% 86.0% 7.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
org.apache.shardingsphere.distsql.parser.autogen.SQLParserDistSQLStatementVisitor
 org.apache.shardingsphere.distsql.parser.autogen.SQLParserDistSQLStatementBaseVisitor
org.apache.shardingsphere.distsql.parser.autogen.SQLParserDistSQLStatementLexer
org.apache.shardingsphere.distsql.parser.autogen.SQLParserDistSQLStatementParser
org.apache.shardingsphere.distsql.parser.autogen.SQLParserDistSQLStatementParser$AlterSQLParserRuleContext
org.apache.shardingsphere.distsql.parser.autogen.SQLParserDistSQLStatementParser$CacheOptionContext
org.apache.shardingsphere.distsql.parser.autogen.SQLParserDistSQLStatementParser$ExecuteContext
org.apache.shardingsphere.distsql.parser.autogen.SQLParserDistSQLStatementParser$InitialCapacityContext
org.apache.shardingsphere.distsql.parser.autogen.SQLParserDistSQLStatementParser$MaximumSizeContext
org.apache.shardingsphere.distsql.parser.autogen.SQLParserDistSQLStatementParser$ParseTreeCacheDefinitionContext
org.apache.shardingsphere.distsql.parser.autogen.SQLParserDistSQLStatementParser$ShowSQLParserRuleContext
org.apache.shardingsphere.distsql.parser.autogen.SQLParserDistSQLStatementParser$SqlParserRuleDefinitionContext
org.apache.shardingsphere.distsql.parser.autogen.SQLParserDistSQLStatementParser$SqlStatementCacheDefinitionContext
 org.apache.shardingsphere.parser.distsql.parser.core
 java.lang
java.util
org.antlr.v4.runtime
org.antlr.v4.runtime.atn
org.antlr.v4.runtime.dfa
org.antlr.v4.runtime.tree

org.apache.shardingsphere.parser.distsql.parser.core

Afferent Couplings Efferent Couplings Abstractness Instability Distance
1 12 0.0% 92.0% 8.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
None org.apache.shardingsphere.parser.distsql.parser.core.SQLParserDistSQLLexer
org.apache.shardingsphere.parser.distsql.parser.core.SQLParserDistSQLParser
org.apache.shardingsphere.parser.distsql.parser.core.SQLParserDistSQLStatementVisitor
 org.apache.shardingsphere.parser.distsql.parser.facade
 java.lang
org.antlr.v4.runtime
org.antlr.v4.runtime.tree
org.apache.shardingsphere.distsql.parser.autogen
org.apache.shardingsphere.parser.distsql.segment
org.apache.shardingsphere.parser.distsql.statement.queryable
org.apache.shardingsphere.parser.distsql.statement.updatable
org.apache.shardingsphere.sql.parser.api
org.apache.shardingsphere.sql.parser.api.parser
org.apache.shardingsphere.sql.parser.api.visitor
org.apache.shardingsphere.sql.parser.core
org.apache.shardingsphere.sql.parser.statement.core.value.identifier

org.apache.shardingsphere.parser.distsql.parser.facade

Afferent Couplings Efferent Couplings Abstractness Instability Distance
0 3 0.0% 100.0% 0.0%
Abstract Classes Concrete Classes Used by Packages Uses Packages
None org.apache.shardingsphere.parser.distsql.parser.facade.SQLParserDistSQLParserFacade
 None java.lang
org.apache.shardingsphere.distsql.parser.engine.spi
org.apache.shardingsphere.parser.distsql.parser.core

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.