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## Metric Results

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

The following document contains the results of a JDependmetric analysis. The various metrics are defined at the bottom of this document.

## Summary

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

Package | TC | AC | CC | AC | EC | A | I | D
--- | --- | --- | --- | --- | --- | --- | --- | ---
org.apache.commons.jexl | 9 | 4 | 5 | 4 | 7 | 0.44 | 64% | 8%
org.apache.commons.jexl.context | 1 | 0 | 1 | 1 | 2 | 0 | 67% | 33%
org.apache.commons.jexl.junit | 1 | 0 | 1 | 0 | 4 | 0 | 100% | 0%
org.apache.commons.jexl.parser | 55 | 4 | 51 | 1 | 8 | 0.07 | 89% | 4%
org.apache.commons.jexl.resolver | 1 | 0 | 1 | 0 | 3 | 0 | 100% | 0%
org.apache.commons.jexl.util | 8 | 1 | 7 | 2 | 5 | 0.12 | 71% | 16%
org.apache.commons.jexl.util.introspection | 18 | 5 | 13 | 2 | 5 | 0.28 | 71% | 1%

## Packages

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

### org.apache.commons.jexl

Afferent Couplings | Efferent Couplings | Abstractness | Instability | Distance
--- | --- | --- | --- | ---
4 | 7 | 44% | 64% | 8%

Abstract Classes | Concrete Classes | Used by Packages | Uses Packages
--- | --- | --- | ---
Expression JexlContext JexlExprResolver Script | ExpressionFactory ExpressionImpl JexlHelper ScriptFactory ScriptImpl | org.apache.commons.jexl.context org.apache.commons.jexl.junit org.apache.commons.jexl.parser org.apache.commons.jexl.resolver | java.io java.lang java.net java.util org.apache.commons.jexl.context org.apache.commons.jexl.parser org.apache.commons.logging

### org.apache.commons.jexl.context

Afferent Couplings | Efferent Couplings | Abstractness | Instability | Distance
--- | --- | --- | --- | ---
1 | 2 | 0% | 67% | 33%

Abstract Classes | Concrete Classes | Used by Packages | Uses Packages
--- | --- | --- | ---
None | HashMapContext | org.apache.commons.jexl | java.util org.apache.commons.jexl

### org.apache.commons.jexl.junit

Afferent Couplings | Efferent Couplings | Abstractness | Instability | Distance
--- | --- | --- | --- | ---
0 | 4 | 0% | 100% | 0%

Abstract Classes | Concrete Classes | Used by Packages | Uses Packages
--- | --- | --- | ---
None | Asserter | None | java.lang java.util junit.framework org.apache.commons.jexl

### org.apache.commons.jexl.parser

Afferent Couplings | Efferent Couplings | Abstractness | Instability | Distance
--- | --- | --- | --- | ---
1 | 8 | 7% | 89% | 4%

Abstract Classes | Concrete Classes | Used by Packages | Uses Packages
--- | --- | --- | ---
Node ParserConstants ParserTreeConstants ParserVisitor | ASTAddNode ASTAndNode ASTArrayAccess ASTAssignment ASTBitwiseAndNode ASTBitwiseComplNode ASTBitwiseOrNode ASTBitwiseXorNode ASTBlock ASTDivNode ASTEQNode ASTEmptyFunction ASTExpression ASTExpressionExpression ASTFalseNode ASTFloatLiteral ASTForeachStatement ASTGENode ASTGTNode ASTIdentifier ASTIfStatement ASTIntegerLiteral ASTJexlScript ASTLENode ASTLTNode ASTMethod ASTModNode ASTMulNode ASTNENode ASTNotNode ASTNullLiteral ASTOrNode ASTReference ASTReferenceExpression ASTSizeFunction ASTSizeMethod ASTStatementExpression ASTStringLiteral ASTSubtractNode ASTTrueNode ASTUnaryMinusNode ASTWhileStatement JJTParserState ParseException Parser Parser$JJCalls ParserTokenManager SimpleCharStream SimpleNode Token TokenMgrError | org.apache.commons.jexl | java.io java.lang java.lang.reflect java.math java.util org.apache.commons.jexl org.apache.commons.jexl.util org.apache.commons.jexl.util.introspection

### org.apache.commons.jexl.resolver

Afferent Couplings | Efferent Couplings | Abstractness | Instability | Distance
--- | --- | --- | --- | ---
0 | 3 | 0% | 100% | 0%

Abstract Classes | Concrete Classes | Used by Packages | Uses Packages
--- | --- | --- | ---
None | FlatResolver | None | java.lang java.util org.apache.commons.jexl

### org.apache.commons.jexl.util

Afferent Couplings | Efferent Couplings | Abstractness | Instability | Distance
--- | --- | --- | --- | ---
2 | 5 | 12% | 71% | 16%

Abstract Classes | Concrete Classes | Used by Packages | Uses Packages
--- | --- | --- | ---
AbstractExecutor | ArrayIterator BooleanPropertyExecutor Coercion EnumerationIterator GetExecutor Introspector PropertyExecutor | org.apache.commons.jexl.parser org.apache.commons.jexl.util.introspection | java.lang java.lang.reflect java.util org.apache.commons.jexl.util.introspection org.apache.commons.logging

### org.apache.commons.jexl.util.introspection

Afferent Couplings | Efferent Couplings | Abstractness | Instability | Distance
--- | --- | --- | --- | ---
2 | 5 | 28% | 71% | 1%

Abstract Classes | Concrete Classes | Used by Packages | Uses Packages
--- | --- | --- | ---
Uberspect UberspectLoggable VelMethod VelPropertyGet VelPropertySet | ClassMap ClassMap$1 ClassMap$CacheMiss ClassMap$MethodInfo Info Introspector IntrospectorBase MethodMap MethodMap$AmbiguousException UberspectImpl UberspectImpl$VelGetterImpl UberspectImpl$VelMethodImpl UberspectImpl$VelSetterImpl | org.apache.commons.jexl.parser org.apache.commons.jexl.util | java.lang java.lang.reflect java.util org.apache.commons.jexl.util org.apache.commons.logging

## Cycles

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

Package | Cyclic Dependencies
--- | ---
org.apache.commons.jexl | org.apache.commons.jexl.parser org.apache.commons.jexl.util org.apache.commons.jexl.util.introspection org.apache.commons.jexl.util
org.apache.commons.jexl.context | org.apache.commons.jexl org.apache.commons.jexl.parser org.apache.commons.jexl.util org.apache.commons.jexl.util.introspection org.apache.commons.jexl.util
org.apache.commons.jexl.junit | org.apache.commons.jexl org.apache.commons.jexl.parser org.apache.commons.jexl.util org.apache.commons.jexl.util.introspection org.apache.commons.jexl.util
org.apache.commons.jexl.parser | org.apache.commons.jexl.util org.apache.commons.jexl.util.introspection org.apache.commons.jexl.util
org.apache.commons.jexl.resolver | org.apache.commons.jexl org.apache.commons.jexl.parser org.apache.commons.jexl.util org.apache.commons.jexl.util.introspection org.apache.commons.jexl.util
org.apache.commons.jexl.util | org.apache.commons.jexl.util.introspection org.apache.commons.jexl.util
org.apache.commons.jexl.util.introspection | org.apache.commons.jexl.util org.apache.commons.jexl.util.introspection

## Explanations

[ 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.