| Package | TC | CC | AC | Ca | Ce | A | I | D | V |
|---|---|---|---|---|---|---|---|---|---|
| org.apache.commons.pool | 27 | 17 | 10 | 1 | 2 | 37.0% | 67.0% | 4.0% | 1 |
| org.apache.commons.pool.impl | 28 | 28 | 0 | 0 | 7 | 0.0% | 100.0% | 0.0% | 1 |
| Afferent Couplings | Efferent Couplings | Abstractness | Instability | Distance |
|---|---|---|---|---|
| 1 | 2 | 37.0% | 67.0% | 4.0% |
| Abstract Classes | Concrete Classes | Used by Packages | Uses Packages |
|---|---|---|---|
| org.apache.commons.pool.BaseKeyedObjectPool org.apache.commons.pool.BaseKeyedPoolableObjectFactory org.apache.commons.pool.BaseObjectPool org.apache.commons.pool.BasePoolableObjectFactory org.apache.commons.pool.KeyedObjectPool org.apache.commons.pool.KeyedObjectPoolFactory org.apache.commons.pool.KeyedPoolableObjectFactory org.apache.commons.pool.ObjectPool org.apache.commons.pool.ObjectPoolFactory org.apache.commons.pool.PoolableObjectFactory | org.apache.commons.pool.PoolUtils org.apache.commons.pool.PoolUtils$CheckedKeyedObjectPool org.apache.commons.pool.PoolUtils$CheckedObjectPool org.apache.commons.pool.PoolUtils$ErodingFactor org.apache.commons.pool.PoolUtils$ErodingKeyedObjectPool org.apache.commons.pool.PoolUtils$ErodingObjectPool org.apache.commons.pool.PoolUtils$ErodingPerKeyKeyedObjectPool org.apache.commons.pool.PoolUtils$KeyedObjectPoolAdaptor org.apache.commons.pool.PoolUtils$KeyedObjectPoolMinIdleTimerTask org.apache.commons.pool.PoolUtils$KeyedPoolableObjectFactoryAdaptor org.apache.commons.pool.PoolUtils$ObjectPoolAdaptor org.apache.commons.pool.PoolUtils$ObjectPoolMinIdleTimerTask org.apache.commons.pool.PoolUtils$PoolableObjectFactoryAdaptor org.apache.commons.pool.PoolUtils$SynchronizedKeyedObjectPool org.apache.commons.pool.PoolUtils$SynchronizedKeyedPoolableObjectFactory org.apache.commons.pool.PoolUtils$SynchronizedObjectPool org.apache.commons.pool.PoolUtils$SynchronizedPoolableObjectFactory | org.apache.commons.pool.impl | java.lang java.util |
| Afferent Couplings | Efferent Couplings | Abstractness | Instability | Distance |
|---|---|---|---|---|
| 0 | 7 | 0.0% | 100.0% | 0.0% |
| Abstract Classes | Concrete Classes | Used by Packages | Uses Packages |
|---|---|---|---|
| None | org.apache.commons.pool.impl.CursorableLinkedList org.apache.commons.pool.impl.CursorableLinkedList$Cursor org.apache.commons.pool.impl.CursorableLinkedList$ListIter org.apache.commons.pool.impl.CursorableLinkedList$Listable org.apache.commons.pool.impl.CursorableSubList org.apache.commons.pool.impl.EvictionTimer org.apache.commons.pool.impl.EvictionTimer$1 org.apache.commons.pool.impl.EvictionTimer$PrivilegedGetTccl org.apache.commons.pool.impl.EvictionTimer$PrivilegedSetTccl org.apache.commons.pool.impl.GenericKeyedObjectPool org.apache.commons.pool.impl.GenericKeyedObjectPool$1 org.apache.commons.pool.impl.GenericKeyedObjectPool$Config org.apache.commons.pool.impl.GenericKeyedObjectPool$Evictor org.apache.commons.pool.impl.GenericKeyedObjectPool$Latch org.apache.commons.pool.impl.GenericKeyedObjectPool$ObjectQueue org.apache.commons.pool.impl.GenericKeyedObjectPool$ObjectTimestampPair org.apache.commons.pool.impl.GenericKeyedObjectPoolFactory org.apache.commons.pool.impl.GenericObjectPool org.apache.commons.pool.impl.GenericObjectPool$1 org.apache.commons.pool.impl.GenericObjectPool$Config org.apache.commons.pool.impl.GenericObjectPool$Evictor org.apache.commons.pool.impl.GenericObjectPool$Latch org.apache.commons.pool.impl.GenericObjectPoolFactory org.apache.commons.pool.impl.SoftReferenceObjectPool org.apache.commons.pool.impl.StackKeyedObjectPool org.apache.commons.pool.impl.StackKeyedObjectPoolFactory org.apache.commons.pool.impl.StackObjectPool org.apache.commons.pool.impl.StackObjectPoolFactory | None | java.io java.lang java.lang.ref java.lang.reflect java.security java.util org.apache.commons.pool |
| 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. |