Top Description Fields Constructors Methods

org.aspectj.apache.bcel.classfile

public final Class ClassParser

Class Inheritance

extends Object

java.lang.Object
org.aspectj.apache.bcel.classfile.ClassParser

Imports

java.io.BufferedInputStream, .ByteArrayInputStream, .DataInputStream, .FileInputStream, .IOException, .InputStream, org.aspectj.apache.bcel.Constants

Wrapper class that parses a given Java .class file. The method parse returns a JavaClass object on success. When an I/O error or an inconsistency occurs an appropiate exception is propagated back to the caller. The structure and the names comply, except for a few conveniences, exactly with the JVM specification 1.0. See this paper for further details about the structure of a bytecode file.

Author: M. Dahm
Version: $Id: ClassParser.java,v 1.6 2008/05/30 17:29:14 aclement Exp $

Field Summary

Modifier and Type	Field and Description
private int	accessflags
private Attribute[]	attributes
private static final int	BUFSIZE
private int	classnameIndex
private ConstantPool	cpool
private Field[]	fields
private DataInputStream	file
private String	filename
private int[]	interfaceIndices
private int	major
private Method[]	methods
private int	minor
private static final int[]	NO_INTERFACES
private int	superclassnameIndex

Constructor Summary

Access	Constructor and Description
public	ClassParser(InputStream file, String filename) Parse class from the given stream
public	ClassParser(ByteArrayInputStream baos, String filename)
public	ClassParser(String file_name) Parse class from given .class file

Method Summary

Modifier and Type	Method and Description
public JavaClass	parse() Parse the given Java class file and return an object that represents the contained data, i.e., constants, methods, fields and commands.
private final void	readAttributes() Read information about the attributes of the class
private final void	readClassInfo() Read information about the class and its super class
private final void	readConstantPool()
private final void	readFields() Read information about the fields of the class
private final void	readID() Check whether the header of the file is ok.
private final void	readInterfaces() Read information about the interfaces implemented by this class
private final void	readMethods() Read information about the methods of the class
private final void	readVersion() Read major and minor version of compiler which created the file

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

accessflags	back to summary
private int accessflags

attributes	back to summary
private Attribute[] attributes

BUFSIZE	back to summary
private static final int BUFSIZE

classnameIndex	back to summary
private int classnameIndex

cpool	back to summary
private ConstantPool cpool

fields	back to summary
private Field[] fields

file	back to summary
private DataInputStream file

filename	back to summary
private String filename

interfaceIndices	back to summary
private int[] interfaceIndices

major	back to summary
private int major

methods	back to summary
private Method[] methods

minor	back to summary
private int minor

NO_INTERFACES	back to summary
private static final int[] NO_INTERFACES

superclassnameIndex	back to summary
private int superclassnameIndex

Constructor Detail

ClassParser	back to summary
public ClassParser(InputStream file, String filename) Parse class from the given stream

ClassParser	back to summary
public ClassParser(ByteArrayInputStream baos, String filename)

ClassParser	back to summary
public ClassParser(String file_name) throws IOException Parse class from given .class file

Method Detail

parse	back to summary
public JavaClass parse() throws IOException, ClassFormatException Parse the given Java class file and return an object that represents the contained data, i.e., constants, methods, fields and commands. A ClassFormatException is raised, if the file is not a valid .class file. (This does not include verification of the byte code as it is performed by the java interpreter).

readAttributes	back to summary
private final void readAttributes() Read information about the attributes of the class

readClassInfo	back to summary
private final void readClassInfo() throws IOException Read information about the class and its super class

readConstantPool	back to summary
private final void readConstantPool() throws IOException

readFields	back to summary
private final void readFields() throws IOException, ClassFormatException Read information about the fields of the class

readID	back to summary
private final void readID() throws IOException Check whether the header of the file is ok. Of course, this has to be the first action on successive file reads

readInterfaces	back to summary
private final void readInterfaces() throws IOException Read information about the interfaces implemented by this class

readMethods	back to summary
private final void readMethods() throws IOException Read information about the methods of the class

readVersion	back to summary
private final void readVersion() throws IOException Read major and minor version of compiler which created the file