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java.lang.Objectjdepend.framework.JDepend
public class JDepend
The JDepend
class analyzes directories
of Java class files and generates the following
metrics for each Java package.
The number of packages that depend upon the classes within the analyzed package.
The number of packages that the classes in the analyzed package depend upon.
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.
The ratio of efferent coupling (Ce) to total coupling (Ce / (Ce + Ca)).
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.
The perpendicular distance of a package from the idealized line A + I = 1. A package coincident with 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.
Package dependency cycles are reported along with the paths of packages participating in package dependency cycles.
These metrics are hereafter referred to as the "Martin Metrics", as they are credited to Robert Martin (Object Mentor Inc.) and referenced in the book "Designing Object Oriented C++ Applications using the Booch Method", by Robert C. Martin, Prentice Hall, 1995.
Example API use:
JDepend jdepend = new JDepend(); jdepend.addDirectory("/path/to/classes"); Collection packages = jdepend.analyze(); Iterator i = packages.iterator(); while (i.hasNext()) { JavaPackage jPackage = (JavaPackage)i.next(); String name = jPackage.getName(); int Ca = jPackage.afferentCoupling(); int Ce = jPackage.efferentCoupling(); float A = jPackage.abstractness(); float I = jPackage.instability(); float D = jPackage.distance(); boolean b = jPackage.containsCycle(); }
This class is the data model used by the
jdepend.textui.JDepend
and jdepend.swingui.JDepend
views.
Constructor Summary | |
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JDepend()
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JDepend(PackageFilter filter)
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Method Summary | |
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void |
addDirectory(java.lang.String name)
Adds the specified directory name to the collection of directories to be analyzed. |
void |
addPackage(JavaPackage pkg)
Adds the specified Java package to the collection of analyzed packages. |
JavaPackage |
addPackage(java.lang.String pkgName)
Adds the specified Java package name to the collection of analyzed packages. |
void |
addPackages(java.util.Collection packages)
Adds the specified collection of packages to the collection of analyzed packages. |
void |
addParseListener(ParserListener listener)
Registers the specified parser listener. |
java.util.Collection |
analyze()
Analyzes the registered directories and returns the collection of analyzed packages. |
void |
analyzeInnerClasses(boolean b)
Determines whether inner classes are analyzed. |
boolean |
containsCycles()
Indicates whether the packages contain one or more dependency cycles. |
int |
countClasses()
Returns the number of registered Java classes to be analyzed. |
int |
countPackages()
Returns the number of analyzed Java packages. |
boolean |
dependencyMatch(DependencyConstraint constraint)
Indicates whether the analyzed packages match the specified dependency constraint. |
PackageFilter |
getFilter()
Returns the package filter. |
JavaPackage |
getPackage(java.lang.String name)
Returns the analyzed package of the specified name. |
java.util.Collection |
getPackages()
Returns the collection of analyzed packages. |
void |
setFilter(PackageFilter filter)
Sets the package filter. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public JDepend()
public JDepend(PackageFilter filter)
Method Detail |
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public java.util.Collection analyze()
public void addDirectory(java.lang.String name) throws java.io.IOException
name
- Directory name.
java.io.IOException
- If the directory is invalid.public void analyzeInnerClasses(boolean b)
b
- true
to analyze inner classes;
false
otherwise.public java.util.Collection getPackages()
public JavaPackage getPackage(java.lang.String name)
name
- Package name.
null
if the
package was not analyzed.public int countPackages()
public int countClasses()
public boolean containsCycles()
true
if one or more dependency
cycles exist.public boolean dependencyMatch(DependencyConstraint constraint)
true
if the packages
match the dependency constraintpublic void addParseListener(ParserListener listener)
listener
- Parser listener.public JavaPackage addPackage(java.lang.String pkgName)
pkgName
- Java package name.
public void addPackages(java.util.Collection packages)
packages
- Collection of packages.public void addPackage(JavaPackage pkg)
pkg
- Java package.public PackageFilter getFilter()
public void setFilter(PackageFilter filter)
filter
- Package filter.
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