/*
 * ClassFile.java
 *
 * Created on March 12th, 1999
 *
 * Modification Log:
 * 1.00 12th Mar 1999 Tanmay Original version.
 * 1.01 18th Mar 1999 Tanmay Throws IOexception instead of Exception. Some attributes
 * need constant pool for read.
 * 1.02 12th Jun 1999 Tanmay Methods to verify and get text summary added.
 *-----------------------------------------------------------------------------------------
 * 10th Sep 2003 Tanmay Moved to SourceForge (http://classeditor.sourceforge.net)
 *-----------------------------------------------------------------------------------------
 * 1.03 28th Sep 2003 Tanmay Moved text summary method to visitor.
 *
 */


package classfile;

import classfile.attributes.Attributes;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.Vector;


/**
 * Reads, writes and manipulates the whole class file. Contains other classes
 * to perform the same job on different sections.
 *<br><br>
 *
 * @author 	 Tanmay K. Mohapatra
 * @version 1.03, 28th Sep, 2003
 */


public class ClassFile {
 public Version version = new Version();
 public ConstantPool constantPool = new ConstantPool();
 public AccessFlags accessFlags = new AccessFlags();
 public ClassNames classNames = new ClassNames();
 public Interfaces interfaces = new Interfaces();
 public Fields fields = new Fields();
 public Methods methods = new Methods();
 public Attributes attributes = new Attributes();
 
 public int iReadWriteStage;
 
 public void createSimplestClass() throws IOException {
 byte [] bClassDump = {
 (byte)0xca, (byte)0xfe, (byte)0xba, (byte)0xbe, (byte)0x00, (byte)0x03, (byte)0x00, (byte)0x2d, (byte)0x00, (byte)0x0a, (byte)0x0a, (byte)0x00, (byte)0x03, (byte)0x00, (byte)0x07, (byte)0x07,
 (byte)0x00, (byte)0x08, (byte)0x07, (byte)0x00, (byte)0x09, (byte)0x01, (byte)0x00, (byte)0x06, (byte)0x3c, (byte)0x69, (byte)0x6e, (byte)0x69, (byte)0x74, (byte)0x3e, (byte)0x01, (byte)0x00,
 (byte)0x03, (byte)0x28, (byte)0x29, (byte)0x56, (byte)0x01, (byte)0x00, (byte)0x04, (byte)0x43, (byte)0x6f, (byte)0x64, (byte)0x65, (byte)0x0c, (byte)0x00, (byte)0x04, (byte)0x00, (byte)0x05,
 (byte)0x01, (byte)0x00, (byte)0x06, (byte)0x73, (byte)0x69, (byte)0x6d, (byte)0x70, (byte)0x6c, (byte)0x65, (byte)0x01, (byte)0x00, (byte)0x10, (byte)0x6a, (byte)0x61, (byte)0x76, (byte)0x61,
 (byte)0x2f, (byte)0x6c, (byte)0x61, (byte)0x6e, (byte)0x67, (byte)0x2f, (byte)0x4f, (byte)0x62, (byte)0x6a, (byte)0x65, (byte)0x63, (byte)0x74, (byte)0x00, (byte)0x21, (byte)0x00, (byte)0x02,
 (byte)0x00, (byte)0x03, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x01, (byte)0x00, (byte)0x01, (byte)0x00, (byte)0x04, (byte)0x00, (byte)0x05, (byte)0x00, (byte)0x01,
 (byte)0x00, (byte)0x06, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x11, (byte)0x00, (byte)0x01, (byte)0x00, (byte)0x01, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x05, (byte)0x2a, (byte)0xb7,
 (byte)0x00, (byte)0x01, (byte)0xb1, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00
 };
 ByteArrayInputStream bais = new ByteArrayInputStream(bClassDump);
 DataInputStream dis = new DataInputStream(bais);
 read(dis);
 }
 
 /**
 * reads the class file into data structures.
 */
 public void read(DataInputStream dis) throws IOException {
 iReadWriteStage = 0;
 version.read(dis);
 iReadWriteStage = 1;
 
 constantPool.read(dis);
 constantPool.resolveReferences();
 iReadWriteStage = 2;
 
 accessFlags.read(dis);
 iReadWriteStage = 3;
 classNames.read(dis, constantPool);
 iReadWriteStage = 4;
 
 interfaces.read(dis, constantPool);
 iReadWriteStage = 5;
 fields.read(dis, constantPool);
 iReadWriteStage = 6;
 methods.read(dis, constantPool);
 iReadWriteStage = 7;
 
 attributes.read(dis, constantPool);
 iReadWriteStage = 8;
 }
 
 /**
 * writes a class file from data structures.
 */
 public void write(DataOutputStream dos) throws IOException {
 iReadWriteStage = 0;
 version.write(dos);
 iReadWriteStage = 1;
 
 //constantPool.removeUnreferenced();
 constantPool.write(dos);
 iReadWriteStage = 2;
 
 accessFlags.write(dos);
 iReadWriteStage = 3;
 classNames.write(dos, constantPool);
 iReadWriteStage = 4;
 
 interfaces.write(dos, constantPool);
 iReadWriteStage = 5;
 fields.write(dos, constantPool);
 iReadWriteStage = 6;
 methods.write(dos, constantPool);
 iReadWriteStage = 7;
 
 attributes.write(dos, constantPool);
 iReadWriteStage = 8;
 }
 
 public boolean verify(Vector vectVerifyErrors) {
 boolean bRet = true;
 
 bRet = (version.verify(vectVerifyErrors) && bRet);
 bRet = (constantPool.verify(vectVerifyErrors) && bRet);
 bRet = (accessFlags.verify("ClassFile", vectVerifyErrors, true) && bRet);
 bRet = (classNames.verify(vectVerifyErrors) && bRet);
 bRet = (interfaces.verify(vectVerifyErrors) && bRet);
 bRet = (fields.verify(vectVerifyErrors) && bRet);
 bRet = (methods.verify(vectVerifyErrors) && bRet);
 bRet = (attributes.verify("ClassFile", vectVerifyErrors) && bRet);
 return bRet;
 }
 
 /**
 * Give a string representation of the class file with details.
 */
 public String toString() {
 return "ClassEditor: " + classNames.getThisClassName();
 }
}