de.rwth.utils
Class AbstractClassProcessor

java.lang.Object
  |
  +--de.rwth.utils.AbstractClassProcessor

Direct Known Subclasses:

AbstractAnalyser

public abstract class AbstractClassProcessor

extends java.lang.Object

An abstract class for building applications which can process the methods in a class file based on BCEL. It does command line processing.

Version:

$Id: AbstractClassProcessor.java,v 1.4 2002/09/17 06:53:53 mohnen Exp $

Author:

Markus Mohnen

Field Summary

protected java.io.File	file The file to process.
protected java.util.Collection	flags The flags detected by this processor.

Constructor Summary

AbstractClassProcessor(java.lang.String[] args, java.util.Collection validFlags)
Creates a new AbstractClassProcessor instance.

Method Summary

void	process() Processes the file.
abstract void	process(de.fub.bytecode.classfile.JavaClass jclass, java.lang.String filename) Supposed to process a BCEL class data structure.
void	usage(java.lang.String[] args, int conflictIndex, java.lang.String errorText, java.util.Collection validFlags) Prints a usage message to standard error and exits.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

flags

protected java.util.Collection flags

The flags detected by this processor.

file

protected java.io.File file

The file to process.

Constructor Detail

AbstractClassProcessor

public AbstractClassProcessor(java.lang.String[] args,
                              java.util.Collection validFlags)

Creates a new AbstractClassProcessor instance. Prints an error message if the command line is not of the form '[options] file'. Otherwise, it sets the flags and the file according to the command line. Implementations must override process() and call it.

Parameters:

args - a String[] value: The command line arguments.

validFlags - a Collection value: A set containing the base names of options, i.e. "v" for "-v".

Method Detail

usage

public void usage(java.lang.String[] args,
                  int conflictIndex,
                  java.lang.String errorText,
                  java.util.Collection validFlags)

Prints a usage message to standard error and exits.

Parameters:

args - a String[] value

conflictIndex - an int value

errorText - a String value

validFlags - a Collection value

process

public void process()
             throws java.io.FileNotFoundException,
                    java.io.IOException

Processes the file. It opens a FileInputStream, parses the class file using BCEL and passes control to process(JavaClass,String).

Throws:

java.io.FileNotFoundException - if an error occurs

java.io.IOException - if an error occurs

process

public abstract void process(de.fub.bytecode.classfile.JavaClass jclass,
                             java.lang.String filename)

Supposed to process a BCEL class data structure.

Parameters:

jclass - a JavaClass value

filename - a String value