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 ]
Summary
| Package |
TC |
CC |
AC |
Ca |
Ce |
A |
I |
D |
V |
| org.apache.shardingsphere.data.pipeline.mysql.datasource |
1 |
1 |
0 |
0 |
5 |
0.0% |
100.0% |
0.0% |
1 |
| org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog |
1 |
1 |
0 |
1 |
3 |
0.0% |
75.0% |
25.0% |
1 |
| org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data |
1 |
1 |
0 |
1 |
7 |
0.0% |
88.0% |
12.0% |
1 |
| org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.binary |
1 |
1 |
0 |
1 |
9 |
0.0% |
90.0% |
10.0% |
1 |
| org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.unsigned |
2 |
1 |
1 |
2 |
5 |
50.0% |
71.0% |
21.0% |
1 |
| org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.unsigned.impl |
5 |
5 |
0 |
1 |
4 |
0.0% |
80.0% |
20.0% |
1 |
| org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.event |
2 |
1 |
1 |
5 |
1 |
50.0% |
17.0% |
33.0% |
1 |
| org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.event.query |
1 |
1 |
0 |
1 |
2 |
0.0% |
67.0% |
33.0% |
1 |
| org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.event.rows |
4 |
3 |
1 |
2 |
3 |
25.0% |
60.000004% |
15.000001% |
1 |
| org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.event.transaction |
1 |
1 |
0 |
1 |
2 |
0.0% |
67.0% |
33.0% |
1 |
| org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.position |
2 |
2 |
0 |
1 |
5 |
0.0% |
83.0% |
17.0% |
1 |
| org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client |
6 |
6 |
0 |
3 |
18 |
0.0% |
86.0% |
14.0% |
1 |
| org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client.netty |
7 |
7 |
0 |
1 |
30 |
0.0% |
97.0% |
3.0% |
1 |
| org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.dumper |
2 |
2 |
0 |
0 |
25 |
0.0% |
100.0% |
0.0% |
1 |
| org.apache.shardingsphere.data.pipeline.mysql.ingest.inventory |
1 |
1 |
0 |
0 |
4 |
0.0% |
100.0% |
0.0% |
1 |
| org.apache.shardingsphere.data.pipeline.mysql.query |
1 |
1 |
0 |
0 |
3 |
0.0% |
100.0% |
0.0% |
1 |
Packages
[ summary ] [ packages ] [ cycles ] [ explanations ]
org.apache.shardingsphere.data.pipeline.mysql.datasource
Packages
| Afferent Couplings |
Efferent Couplings |
Abstractness |
Instability |
Distance |
| 0 |
5 |
0.0% |
100.0% |
0.0% |
Packages
| Abstract Classes |
Concrete Classes |
Used by Packages |
Uses Packages |
| None |
org.apache.shardingsphere.data.pipeline.mysql.datasource.MySQLJdbcQueryPropertiesExtension
|
None |
java.lang
java.util
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client
org.apache.shardingsphere.data.pipeline.spi
org.slf4j
|
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog
Packages
| Afferent Couplings |
Efferent Couplings |
Abstractness |
Instability |
Distance |
| 1 |
3 |
0.0% |
75.0% |
25.0% |
Packages
| Abstract Classes |
Concrete Classes |
Used by Packages |
Uses Packages |
| None |
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.MySQLBinlogContext
|
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client.netty
|
java.lang
java.util
org.apache.shardingsphere.database.protocol.mysql.packet.binlog.row
|
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data
Packages
| Afferent Couplings |
Efferent Couplings |
Abstractness |
Instability |
Distance |
| 1 |
7 |
0.0% |
88.0% |
12.0% |
Packages
| Abstract Classes |
Concrete Classes |
Used by Packages |
Uses Packages |
| None |
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.MySQLBinlogDataHandler
|
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.dumper
|
java.io
java.lang
java.util
org.apache.shardingsphere.data.pipeline.core.metadata.model
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.binary
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.unsigned
org.apache.shardingsphere.database.protocol.mysql.packet.binlog.row.column.value.string
|
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.binary
Packages
| Afferent Couplings |
Efferent Couplings |
Abstractness |
Instability |
Distance |
| 1 |
9 |
0.0% |
90.0% |
10.0% |
Packages
| Abstract Classes |
Concrete Classes |
Used by Packages |
Uses Packages |
| None |
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.binary.MySQLBinlogBinaryStringHandler
|
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data
|
java.io
java.lang
java.nio.charset
org.apache.shardingsphere.data.pipeline.core.metadata.model
org.apache.shardingsphere.database.connector.core.metadata.database.metadata
org.apache.shardingsphere.database.connector.core.metadata.database.metadata.option.datatype
org.apache.shardingsphere.database.connector.core.type
org.apache.shardingsphere.database.protocol.mysql.packet.binlog.row.column.value.string
org.apache.shardingsphere.infra.spi.type.typed
|
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.unsigned
Packages
| Afferent Couplings |
Efferent Couplings |
Abstractness |
Instability |
Distance |
| 2 |
5 |
50.0% |
71.0% |
21.0% |
Packages
| Abstract Classes |
Concrete Classes |
Used by Packages |
Uses Packages |
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.unsigned.MySQLBinlogUnsignedNumberHandler
|
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.unsigned.MySQLBinlogUnsignedNumberHandlerEngine
|
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.unsigned.impl
|
java.io
java.lang
java.util
org.apache.shardingsphere.data.pipeline.core.metadata.model
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.unsigned.impl
|
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.unsigned.impl
Packages
| Afferent Couplings |
Efferent Couplings |
Abstractness |
Instability |
Distance |
| 1 |
4 |
0.0% |
80.0% |
20.0% |
Packages
| Abstract Classes |
Concrete Classes |
Used by Packages |
Uses Packages |
| None |
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.unsigned.impl.MySQLBinlogUnsignedBigintHandler
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.unsigned.impl.MySQLBinlogUnsignedIntHandler
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.unsigned.impl.MySQLBinlogUnsignedMediumintHandler
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.unsigned.impl.MySQLBinlogUnsignedSmallintHandler
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.unsigned.impl.MySQLBinlogUnsignedTinyintHandler
|
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.unsigned
|
java.io
java.lang
java.math
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.unsigned
|
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.event
Packages
| Afferent Couplings |
Efferent Couplings |
Abstractness |
Instability |
Distance |
| 5 |
1 |
50.0% |
17.0% |
33.0% |
Packages
| Abstract Classes |
Concrete Classes |
Used by Packages |
Uses Packages |
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.event.MySQLBaseBinlogEvent
|
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.event.PlaceholderBinlogEvent
|
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.event.query
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.event.rows
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.event.transaction
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client.netty
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.dumper
|
java.lang
|
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.event.query
Packages
| Afferent Couplings |
Efferent Couplings |
Abstractness |
Instability |
Distance |
| 1 |
2 |
0.0% |
67.0% |
33.0% |
Packages
| Abstract Classes |
Concrete Classes |
Used by Packages |
Uses Packages |
| None |
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.event.query.MySQLQueryBinlogEvent
|
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client.netty
|
java.lang
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.event
|
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.event.rows
Packages
| Afferent Couplings |
Efferent Couplings |
Abstractness |
Instability |
Distance |
| 2 |
3 |
25.0% |
60.000004% |
15.000001% |
Packages
| Abstract Classes |
Concrete Classes |
Used by Packages |
Uses Packages |
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.event.rows.MySQLBaseRowsBinlogEvent
|
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.event.rows.MySQLDeleteRowsBinlogEvent
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.event.rows.MySQLUpdateRowsBinlogEvent
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.event.rows.MySQLWriteRowsBinlogEvent
|
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client.netty
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.dumper
|
java.lang
java.util
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.event
|
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.event.transaction
Packages
| Afferent Couplings |
Efferent Couplings |
Abstractness |
Instability |
Distance |
| 1 |
2 |
0.0% |
67.0% |
33.0% |
Packages
| Abstract Classes |
Concrete Classes |
Used by Packages |
Uses Packages |
| None |
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.event.transaction.MySQLXidBinlogEvent
|
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client.netty
|
java.lang
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.event
|
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.position
Packages
| Afferent Couplings |
Efferent Couplings |
Abstractness |
Instability |
Distance |
| 1 |
5 |
0.0% |
83.0% |
17.0% |
Packages
| Abstract Classes |
Concrete Classes |
Used by Packages |
Uses Packages |
| None |
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.position.MySQLBinlogPosition
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.position.MySQLIncrementalPositionManager
|
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.dumper
|
com.google.common.base
java.lang
java.sql
javax.sql
org.apache.shardingsphere.data.pipeline.core.ingest.position
|
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client
Packages
| Afferent Couplings |
Efferent Couplings |
Abstractness |
Instability |
Distance |
| 3 |
18 |
0.0% |
86.0% |
14.0% |
Packages
| Abstract Classes |
Concrete Classes |
Used by Packages |
Uses Packages |
| None |
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client.ConnectInfo
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client.InternalResultSet
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client.MySQLBinlogClient$1
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client.MySQLBinlogClient$MySQLCommandResponseHandler
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client.MySQLServerVersion
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client.PasswordEncryption
|
org.apache.shardingsphere.data.pipeline.mysql.datasource
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client.netty
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.dumper
|
com.google.common.primitives
io.netty.channel
io.netty.channel.socket
io.netty.util.concurrent
java.lang
java.security
java.security.interfaces
java.security.spec
java.util
java.util.regex
javax.crypto
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client.netty
org.apache.shardingsphere.database.protocol.codec
org.apache.shardingsphere.database.protocol.mysql.codec
org.apache.shardingsphere.database.protocol.mysql.netty
org.apache.shardingsphere.database.protocol.mysql.packet.command.query
org.apache.shardingsphere.proxy.frontend.netty
org.slf4j
|
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client.netty
Packages
| Afferent Couplings |
Efferent Couplings |
Abstractness |
Instability |
Distance |
| 1 |
30 |
0.0% |
97.0% |
3.0% |
Packages
| Abstract Classes |
Concrete Classes |
Used by Packages |
Uses Packages |
| None |
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client.netty.MySQLBinlogEventPacketDecoder
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client.netty.MySQLBinlogEventPacketDecoder$1
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client.netty.MySQLCommandPacketDecoder
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client.netty.MySQLCommandPacketDecoder$States
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client.netty.MySQLNegotiateHandler
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client.netty.MySQLNegotiateHandler$1
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client.netty.MySQLNegotiatePackageDecoder
|
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client
|
io.netty.buffer
io.netty.channel
io.netty.handler.codec
io.netty.util
io.netty.util.concurrent
java.lang
java.nio.charset
java.security
java.util
java.util.concurrent.atomic
org.apache.shardingsphere.data.pipeline.core.exception
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.event
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.event.query
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.event.rows
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.event.transaction
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client
org.apache.shardingsphere.database.protocol.constant
org.apache.shardingsphere.database.protocol.mysql.constant
org.apache.shardingsphere.database.protocol.mysql.packet
org.apache.shardingsphere.database.protocol.mysql.packet.binlog
org.apache.shardingsphere.database.protocol.mysql.packet.binlog.management
org.apache.shardingsphere.database.protocol.mysql.packet.binlog.row
org.apache.shardingsphere.database.protocol.mysql.packet.command.query
org.apache.shardingsphere.database.protocol.mysql.packet.command.query.text
org.apache.shardingsphere.database.protocol.mysql.packet.generic
org.apache.shardingsphere.database.protocol.mysql.packet.handshake
org.apache.shardingsphere.database.protocol.mysql.payload
org.apache.shardingsphere.infra.exception.generic
org.slf4j
|
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.dumper
Packages
| Afferent Couplings |
Efferent Couplings |
Abstractness |
Instability |
Distance |
| 0 |
25 |
0.0% |
100.0% |
0.0% |
Packages
| Abstract Classes |
Concrete Classes |
Used by Packages |
Uses Packages |
| None |
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.dumper.MySQLIncrementalDumper
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.dumper.MySQLIncrementalDumperCreator
|
None |
java.io
java.lang
java.util
org.apache.shardingsphere.data.pipeline.api.type
org.apache.shardingsphere.data.pipeline.core.channel
org.apache.shardingsphere.data.pipeline.core.constant
org.apache.shardingsphere.data.pipeline.core.execute
org.apache.shardingsphere.data.pipeline.core.ingest.dumper
org.apache.shardingsphere.data.pipeline.core.ingest.dumper.incremental
org.apache.shardingsphere.data.pipeline.core.ingest.dumper.mapper
org.apache.shardingsphere.data.pipeline.core.ingest.position
org.apache.shardingsphere.data.pipeline.core.ingest.record
org.apache.shardingsphere.data.pipeline.core.metadata.loader
org.apache.shardingsphere.data.pipeline.core.metadata.model
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.event
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.event.rows
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.position
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client
org.apache.shardingsphere.database.connector.core.jdbcurl.parser
org.apache.shardingsphere.database.connector.core.spi
org.apache.shardingsphere.database.connector.core.type
org.apache.shardingsphere.infra.metadata.identifier
org.apache.shardingsphere.infra.spi.type.typed
org.slf4j
|
org.apache.shardingsphere.data.pipeline.mysql.ingest.inventory
Packages
| Afferent Couplings |
Efferent Couplings |
Abstractness |
Instability |
Distance |
| 0 |
4 |
0.0% |
100.0% |
0.0% |
Packages
| Abstract Classes |
Concrete Classes |
Used by Packages |
Uses Packages |
| None |
org.apache.shardingsphere.data.pipeline.mysql.ingest.inventory.MySQLInventoryColumnValueReader
|
None |
java.lang
java.sql
java.util
org.apache.shardingsphere.data.pipeline.core.ingest.dumper.inventory.column
|
org.apache.shardingsphere.data.pipeline.mysql.query
Packages
| Afferent Couplings |
Efferent Couplings |
Abstractness |
Instability |
Distance |
| 0 |
3 |
0.0% |
100.0% |
0.0% |
Packages
| Abstract Classes |
Concrete Classes |
Used by Packages |
Uses Packages |
| None |
org.apache.shardingsphere.data.pipeline.mysql.query.MySQLJDBCStreamQueryBuilder
|
None |
java.lang
java.sql
org.apache.shardingsphere.data.pipeline.core.query
|
Cycles
[ summary ] [ packages ] [ cycles ] [ explanations ]
Cycles
| Package |
Package Dependencies |
| org.apache.shardingsphere.data.pipeline.mysql.datasource |
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client.netty
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client
|
| org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data |
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.unsigned
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.unsigned.impl
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.unsigned
|
| org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.unsigned |
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.unsigned.impl
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.unsigned
|
| org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.unsigned.impl |
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.unsigned
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.binlog.data.unsigned.impl
|
| org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client |
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client.netty
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client
|
| org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client.netty |
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client.netty
|
| org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.dumper |
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client.netty
org.apache.shardingsphere.data.pipeline.mysql.ingest.incremental.client
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Explanation
[ summary ] [ packages ] [ cycles ] [ explanations ]
The following explanations are for quick reference and are lifted directly from the original JDepend documentation.
Explanation
| 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. |
