org.apache.tools.ant.util.depend
Interface DependencyAnalyzer

All Known Implementing Classes:
AbstractAnalyzer

public interface DependencyAnalyzer

A dependency analyzer analyzes dependencies between Java classes to determine the minimal set of classes which are required by a set of "root" classes. Different implementations of this interface can use different strategies and libraries to determine the required set. For example, some analyzers will use class files while others might use source files. Analyzer specific configuration is catered for through a generic configure method


Method Summary
 void addClassPath(Path classpath)
          Add a classpath to the classpath being used by the analyzer.
 void addRootClass(java.lang.String classname)
          Add a root class.
 void addSourcePath(Path sourcePath)
          Add a source path to the source path used by this analyzer.
 void config(java.lang.String name, java.lang.Object info)
          Configure an aspect of the analyzer.
 java.io.File getClassContainer(java.lang.String classname)
          Get the file that contains the class definition
 java.util.Enumeration getClassDependencies()
          Get the list of classes upon which root classes depend.
 java.util.Enumeration getFileDependencies()
          Get the list of files in the file system upon which the root classes depend.
 java.io.File getSourceContainer(java.lang.String classname)
          Get the file that contains the class source.
 void reset()
          Reset the dependency list.
 void setClosure(boolean closure)
          Set the closure flag.
 

Method Detail

addSourcePath

public void addSourcePath(Path sourcePath)
Add a source path to the source path used by this analyzer. The elements in the given path contain the source files for the classes being analyzed. Not all analyzers will use this information.

Parameters:
sourcePath - The Path instance specifying the source path elements.

addClassPath

public void addClassPath(Path classpath)
Add a classpath to the classpath being used by the analyzer. The classpath contains the binary classfiles for the classes being analyzed The elements may either be the directories or jar files.Not all analyzers will use this information.

Parameters:
classpath - the Path instance specifying the classpath elements

addRootClass

public void addRootClass(java.lang.String classname)
Add a root class. The root classes are used to drive the determination of dependency information. The analyzer will start at the root classes and add dependencies from there.

Parameters:
classname - the name of the class in Java dot notation.

getFileDependencies

public java.util.Enumeration getFileDependencies()
Get the list of files in the file system upon which the root classes depend. The files will be either the classfiles or jar files upon which the root classes depend.

Returns:
an enumeration of File instances.

getClassDependencies

public java.util.Enumeration getClassDependencies()
Get the list of classes upon which root classes depend. This is a list of Java classnames in dot notation.

Returns:
an enumeration of Strings, each being the name of a Java class in dot notation.

reset

public void reset()
Reset the dependency list. This will reset the determined dependencies and the also list of root classes.


config

public void config(java.lang.String name,
                   java.lang.Object info)
Configure an aspect of the analyzer. The set of aspects that are supported is specific to each analyzer instance.

Parameters:
name - the name of the aspect being configured
info - the configuration information.

setClosure

public void setClosure(boolean closure)
Set the closure flag. If this flag is true the analyzer will traverse all class relationships until it has collected the entire set of direct and indirect dependencies

Parameters:
closure - true if dependencies should be traversed to determine indirect dependencies.

getClassContainer

public java.io.File getClassContainer(java.lang.String classname)
                               throws java.io.IOException
Get the file that contains the class definition

Parameters:
classname - the name of the required class
Returns:
the file instance, zip or class, containing the class or null if the class could not be found.
Throws:
java.io.IOException - if the files in the classpath cannot be read.

getSourceContainer

public java.io.File getSourceContainer(java.lang.String classname)
                                throws java.io.IOException
Get the file that contains the class source.

Parameters:
classname - the name of the required class
Returns:
the file instance, zip or java, containing the source or null if the source for the class could not be found.
Throws:
java.io.IOException - if the files in the sourcepath cannot be read.


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