org.apache.tools.ant.util.depend

Class AbstractAnalyzer

Implemented Interfaces:
DependencyAnalyzer
Known Direct Subclasses:
AncestorAnalyzer, AntAnalyzer, FullAnalyzer

public abstract class AbstractAnalyzer
extends java.lang.Object
implements DependencyAnalyzer

An abstract implementation of the analyzer interface providing support for the bulk of interface methods.

Field Summary

static int
MAX_LOOPS
Maximum number of loops for looking for indirect dependencies.

Constructor Summary

AbstractAnalyzer()
Setup the analyzer

Method Summary

void
addClassPath(Path classPath)
Add a classpath to the classpath being used by the analyzer.
void
addRootClass(String className)
Add a root class.
void
addSourcePath(Path sourcePath)
Add a source path to the source path used by this analyzer.
void
config(String name, Object info)
Configure an aspect of the analyzer.
protected abstract void
determineDependencies(Vector files, Vector classes)
Determine the dependencies of the current set of root classes
File
getClassContainer(String classname)
Get the file that contains the class definition
Enumeration
getClassDependencies()
Get the list of classes upon which root classes depend.
Enumeration
getFileDependencies()
Get the list of files in the file system upon which the root classes depend.
protected Enumeration
getRootClasses()
Get an enumeration of the root classes
File
getSourceContainer(String classname)
Get the file that contains the class source.
protected boolean
isClosureRequired()
Indicate if the analyzer is required to follow indirect class relationships.
void
reset()
Reset the dependency list.
void
setClosure(boolean closure)
Set the closure flag.
protected abstract boolean
supportsFileDependencies()
Indicate if the particular subclass supports file dependency information.

Field Details

MAX_LOOPS

public static final int MAX_LOOPS
Maximum number of loops for looking for indirect dependencies.
Field Value:
1000

Constructor Details

AbstractAnalyzer

protected AbstractAnalyzer()
Setup the analyzer

Method Details

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.
Specified by:
addClassPath in interface DependencyAnalyzer
Parameters:
classPath - the Path instance specifying the classpath elements

addRootClass

public void addRootClass(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.
Specified by:
addRootClass in interface DependencyAnalyzer
Parameters:
className - the name of the class in Java dot notation.

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.
Specified by:
addSourcePath in interface DependencyAnalyzer
Parameters:
sourcePath - The Path instance specifying the source path elements.

config

public void config(String name,
                   Object info)
Configure an aspect of the analyzer. The set of aspects that are supported is specific to each analyzer instance.
Specified by:
config in interface DependencyAnalyzer
Parameters:
name - the name of the aspect being configured
info - the configuration info.

determineDependencies

protected abstract void determineDependencies(Vector files,
                                              Vector classes)
Determine the dependencies of the current set of root classes
Parameters:
files - a vector into which Files upon which the root classes depend should be placed.
classes - a vector of Strings into which the names of classes upon which the root classes depend should be placed.

getClassContainer

public File getClassContainer(String classname)
            throws IOException
Get the file that contains the class definition
Specified by:
getClassContainer in interface DependencyAnalyzer
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.

getClassDependencies

public Enumeration getClassDependencies()
Get the list of classes upon which root classes depend. This is a list of Java classnames in dot notation.
Specified by:
getClassDependencies in interface DependencyAnalyzer
Returns:
an enumeration of Strings, each being the name of a Java class in dot notation.

getFileDependencies

public 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.
Specified by:
getFileDependencies in interface DependencyAnalyzer
Returns:
an enumeration of File instances.

getRootClasses

protected Enumeration getRootClasses()
Get an enumeration of the root classes
Returns:
an enumeration of Strings, each of which is a class name for a root class.

getSourceContainer

public File getSourceContainer(String classname)
            throws IOException
Get the file that contains the class source.
Specified by:
getSourceContainer in interface DependencyAnalyzer
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.

isClosureRequired

protected boolean isClosureRequired()
Indicate if the analyzer is required to follow indirect class relationships.
Returns:
true if indirect relationships should be followed.

reset

public void reset()
Reset the dependency list. This will reset the determined dependencies and the also list of root classes.
Specified by:
reset in interface DependencyAnalyzer

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
Specified by:
setClosure in interface DependencyAnalyzer
Parameters:
closure - true if dependencies should be traversed to determine indirect dependencies.

supportsFileDependencies

protected abstract boolean supportsFileDependencies()
Indicate if the particular subclass supports file dependency information.
Returns:
true if file dependencies are supported.

Copyright B) 2000-2007 Apache Software Foundation. All Rights Reserved.