## org.apache.tools.ant.util.depend
Class AbstractAnalyzer

    java.lang.Object
      org.apache.tools.ant.util.depend.AbstractAnalyzer

All Implemented Interfaces:
  DependencyAnalyzer

Direct Known 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.

Author:
  Conor MacNeill

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

Constructor Summary
`protected` `AbstractAnalyzer()` Setup the analyzer

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.
`protected abstract void` `determineDependencies(java.util.Vector files, java.util.Vector classes)` Determine the dependencies of the current set of root classes
`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.
`protected java.util.Enumeration` `getRootClasses()` Get an enumeration of the root classes
`java.io.File` `getSourceContainer(java.lang.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.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### MAX_LOOPS

    public static final int MAX_LOOPS

  Maximum number of loops for looking for indirect dependencies.

  See Also:
    Constant Field Values

Constructor Detail

### AbstractAnalyzer

    protected AbstractAnalyzer()

  Setup the analyzer

Method Detail

### 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.

### 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.

  Specified by:
    `getFileDependencies` in interface `DependencyAnalyzer`
  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.

  Specified by:
    `getClassDependencies` in interface `DependencyAnalyzer`
  Returns:
    an enumeration of Strings, each being the name of a Java class in dot notation.

### getClassContainer

    public java.io.File getClassContainer(java.lang.String classname)
                                   throws java.io.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.
  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.

  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.
  Throws:
    `java.io.IOException` - if the files in the sourcepath cannot be read.

### 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.

### 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(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.

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

### 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.

  Specified by:
    `config` in interface `DependencyAnalyzer`
  Parameters:
    `name` - the name of the aspect being configured
    `info` - the configuration info.

### 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`

### getRootClasses

    protected java.util.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.

### isClosureRequired

    protected boolean isClosureRequired()

  Indicate if the analyzer is required to follow indirect class relationships.

  Returns:
    true if indirect relationships should be followed.

### determineDependencies

    protected abstract void determineDependencies(java.util.Vector files,
                                                  java.util.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.

### supportsFileDependencies

    protected abstract boolean supportsFileDependencies()

  Indicate if the particular subclass supports file dependency information.

  Returns:
    true if file dependencies are supported.

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