Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> apache >> bcel >> [ classfile overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

---

org.apache.bcel.classfile
Class ClassParser  

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

---

public final class ClassParser

extends java.lang.Object

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.

Version:

$Id: ClassParser.java 386056 2006-03-15 11:31:56Z tcurdt $

---

Field Summary
private  int	access_flags
private  Attribute[]	attributes
private static int	BUFSIZE
private  int	class_name_index
private  ConstantPool	constant_pool
private  Field[]	fields
private  java.io.DataInputStream	file
private  java.lang.String	file_name
private  boolean	fileOwned
private  int[]	interfaces
private  boolean	is_zip
private  int	major
private  Method[]	methods
private  int	minor
private  int	superclass_name_index
private  java.lang.String	zip_file

 

Constructor Summary

ClassParser(java.io.InputStream file, java.lang.String file_name)           Parse class from the given stream.

ClassParser(java.lang.String file_name)           Parse class from given .class file.

ClassParser(java.lang.String zip_file, java.lang.String file_name)           Parse class from given .class file in a ZIP-archive

 

Method Summary
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  void	readAttributes()           Read information about the attributes of the class.
private  void	readClassInfo()           Read information about the class and its super class.
private  void	readConstantPool()           Read constant pool entries.
private  void	readFields()           Read information about the fields of the class, i.e., its variables.
private  void	readID()           Check whether the header of the file is ok.
private  void	readInterfaces()           Read information about the interfaces implemented by this class.
private  void	readMethods()           Read information about the methods of the class.
private  void	readVersion()           Read major and minor version of compiler which created the file.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

file

private java.io.DataInputStream file

---

fileOwned

private boolean fileOwned

---

file_name

private java.lang.String file_name

---

zip_file

private java.lang.String zip_file

---

class_name_index

private int class_name_index

---

superclass_name_index

private int superclass_name_index

---

major

private int major

---

minor

private int minor

---

access_flags

private int access_flags

---

interfaces

private int[] interfaces

---

constant_pool

private ConstantPool constant_pool

---

fields

private Field[] fields

---

methods

private Method[] methods

---

attributes

private Attribute[] attributes

---

is_zip

private boolean is_zip

---

BUFSIZE

private static final int BUFSIZE

See Also:

Constant Field Values

Constructor Detail

ClassParser

public ClassParser(java.io.InputStream file,
                   java.lang.String file_name)

Parse class from the given stream.

---

ClassParser

public ClassParser(java.lang.String file_name)
            throws java.io.IOException

Parse class from given .class file.

---

ClassParser

public ClassParser(java.lang.String zip_file,
                   java.lang.String file_name)

Parse class from given .class file in a ZIP-archive

Method Detail

parse

public JavaClass parse()
                throws java.io.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

private final void readAttributes()
                           throws java.io.IOException,
                                  ClassFormatException

Read information about the attributes of the class.

---

readClassInfo

private final void readClassInfo()
                          throws java.io.IOException,
                                 ClassFormatException

Read information about the class and its super class.

---

readConstantPool

private final void readConstantPool()
                             throws java.io.IOException,
                                    ClassFormatException

Read constant pool entries.

---

readFields

private final void readFields()
                       throws java.io.IOException,
                              ClassFormatException

Read information about the fields of the class, i.e., its variables.

---

readID

private final void readID()
                   throws java.io.IOException,
                          ClassFormatException

Check whether the header of the file is ok. Of course, this has to be the first action on successive file reads.

---

readInterfaces

private final void readInterfaces()
                           throws java.io.IOException,
                                  ClassFormatException

Read information about the interfaces implemented by this class.

---

readMethods

private final void readMethods()
                        throws java.io.IOException,
                               ClassFormatException

Read information about the methods of the class.

---

readVersion

private final void readVersion()
                        throws java.io.IOException,
                               ClassFormatException

Read major and minor version of compiler which created the file.

---

Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> apache >> bcel >> [ classfile overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

---