📄 codehtml.java

📁 代码是一个分类器的实现,其中使用了部分weka的源代码。可以将项目导入eclipse运行
💻 JAVA
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package de.fub.bytecode.util;import de.fub.bytecode.classfile.*;import java.io.*;import java.util.BitSet;/** * Convert code into HTML file. * * @version $Id: CodeHTML.java,v 1.2 2001/05/09 09:26:57 dahm Exp $ * @author  <A HREF="http://www.berlin.de/~markus.dahm/">M. Dahm</A> *  */final class CodeHTML implements de.fub.bytecode.Constants {  private String 	class_name;     // name of current class  private Method[]	methods;	// Methods to print  private PrintWriter	file;		// file to write to  private BitSet    	goto_set;  private ConstantPool  constant_pool;  private ConstantHTML  constant_html;  private static boolean wide=false;  CodeHTML(String dir, String class_name,	   Method[] methods, ConstantPool constant_pool,	   ConstantHTML constant_html) throws IOException  {    this.class_name   	= class_name;    this.methods	= methods;    this.constant_pool	= constant_pool;    this.constant_html = constant_html;        file = new PrintWriter(new FileOutputStream(dir + class_name + "_code.html"));    file.println("<HTML><BODY BGCOLOR=\"#C0C0C0\">");        for(int i=0; i < methods.length; i++)      writeMethod(methods[i], i);	         file.println("</BODY></HTML>");    file.close();  }                                           /**   * Disassemble a stream of byte codes and return the   * string representation.   *   * @param  stream data input stream   * @return String representation of byte code   */  private final String codeToHTML(ByteSequence bytes, int method_number)       throws IOException  {    short        opcode = (short)bytes.readUnsignedByte();    StringBuffer buf;    String       name, sig, signature;    int          default_offset=0, low, high;    int          index, class_index, vindex, constant;    int[]        jump_table;    int          no_pad_bytes=0, offset;    buf = new StringBuffer("<TT>" + OPCODE_NAMES[opcode] + "</TT></TD><TD>");    /* Special case: Skip (0-3) padding bytes, i.e., the     * following bytes are 4-byte-aligned     */    if((opcode == TABLESWITCH) || (opcode == LOOKUPSWITCH)) {      int remainder = bytes.getIndex() % 4;      no_pad_bytes  = (remainder == 0)? 0 : 4 - remainder;      for(int i=0; i < no_pad_bytes; i++)	bytes.readByte();      // Both cases have a field default_offset in common      default_offset = bytes.readInt();    }    switch(opcode) {    case TABLESWITCH:      low  = bytes.readInt();      high = bytes.readInt();      offset = bytes.getIndex() - 12 - no_pad_bytes - 1;      default_offset += offset;      buf.append("<TABLE BORDER=1><TR>");      // Print switch indices in first row (and default)      jump_table = new int[high - low + 1];      for(int i=0; i < jump_table.length; i++) {	jump_table[i] = offset + bytes.readInt();	buf.append("<TH>" + (low + i) + "</TH>");      }      buf.append("<TH>default</TH></TR>\n<TR>");      // Print target and default indices in second row      for(int i=0; i < jump_table.length; i++)	buf.append("<TD><A HREF=\"#code" + method_number + "@" +		   jump_table[i] + "\">" + jump_table[i] + "</A></TD>");      buf.append("<TD><A HREF=\"#code" + method_number + "@" +		 default_offset + "\">" + default_offset + "</A></TD></TR>\n</TABLE>\n");      break;      /* Lookup switch has variable length arguments.       */    case LOOKUPSWITCH:      int npairs = bytes.readInt();      offset = bytes.getIndex() - 8 - no_pad_bytes - 1;      jump_table = new int[npairs];      default_offset += offset;      buf.append("<TABLE BORDER=1><TR>");      // Print switch indices in first row (and default)      for(int i=0; i < npairs; i++) {	int match = bytes.readInt();	jump_table[i] = offset + bytes.readInt();	buf.append("<TH>" + match + "</TH>");      }      buf.append("<TH>default</TH></TR>\n<TR>");      // Print target and default indices in second row      for(int i=0; i < npairs; i++)	buf.append("<TD><A HREF=\"#code" + method_number + "@" +		   jump_table[i] + "\">" + jump_table[i] + "</A></TD>");      buf.append("<TD><A HREF=\"#code" + method_number + "@" +		 default_offset + "\">" + default_offset + "</A></TD></TR>\n</TABLE>\n");      break;      /* Two address bytes + offset from start of byte stream form the       * jump target.       */    case GOTO:      case IFEQ:      case IFGE:      case IFGT:    case IFLE:      case IFLT:    case IFNE:      case IFNONNULL: case IFNULL:    case IF_ACMPEQ:    case IF_ACMPNE: case IF_ICMPEQ: case IF_ICMPGE: case IF_ICMPGT:    case IF_ICMPLE: case IF_ICMPLT: case IF_ICMPNE: case JSR:	        index = (int)(bytes.getIndex() + bytes.readShort() - 1);	        buf.append("<A HREF=\"#code" + method_number + "@" + index + "\">" + index + "</A>");      break;	        /* Same for 32-bit wide jumps       */    case GOTO_W: case JSR_W:      int windex = bytes.getIndex() + bytes.readInt() - 1;      buf.append("<A HREF=\"#code" + method_number + "@" + windex + "\">" +		 windex + "</A>");      break;      /* Index byte references local variable (register)       */    case ALOAD:  case ASTORE: case DLOAD:  case DSTORE: case FLOAD:    case FSTORE: case ILOAD:  case ISTORE: case LLOAD:  case LSTORE:    case RET:       if(wide) {	vindex = bytes.readShort();	wide=false; // Clear flag      }      else	vindex = bytes.readUnsignedByte();      buf.append("%" + vindex);      break;      /*       * Remember wide byte which is used to form a 16-bit address in the       * following instruction. Relies on that the method is called again with       * the following opcode.       */    case WIDE:      wide      = true;      buf.append("(wide)");      break;      /* Array of basic type.       */    case NEWARRAY:      buf.append("<FONT COLOR=\"#00FF00\">" + TYPE_NAMES[bytes.readByte()] + "</FONT>");      break;      /* Access object/class fields.       */    case GETFIELD: case GETSTATIC: case PUTFIELD: case PUTSTATIC:      index = bytes.readShort();      ConstantFieldref c1 = (ConstantFieldref)constant_pool.getConstant(index, CONSTANT_Fieldref);      class_index = c1.getClassIndex();      name = constant_pool.getConstantString(class_index, CONSTANT_Class);      name = Utility.compactClassName(name, false);      index = c1.getNameAndTypeIndex();      String field_name = constant_pool.constantToString(index, CONSTANT_NameAndType);      if(name.equals(class_name)) { // Local field	buf.append("<A HREF=\"" + class_name + "_methods.html#field" + field_name +		   "\" TARGET=Methods>" + field_name + "</A>\n");      }      else	buf.append(constant_html.referenceConstant(class_index) + "." + field_name);	  		      break;	        /* Operands are references to classes in constant pool       */    case CHECKCAST: case INSTANCEOF: case NEW:      index = bytes.readShort();      buf.append(constant_html.referenceConstant(index));      break;         /* Operands are references to methods in constant pool       */    case INVOKESPECIAL: case INVOKESTATIC: case INVOKEVIRTUAL: case INVOKEINTERFACE:      int m_index = bytes.readShort();      String str;      if(opcode == INVOKEINTERFACE) { // Special treatment needed	int nargs    = bytes.readUnsignedByte(); // Redundant	int reserved = bytes.readUnsignedByte(); // Reserved	ConstantInterfaceMethodref c=(ConstantInterfaceMethodref)constant_pool.getConstant(m_index, CONSTANT_InterfaceMethodref);	class_index = c.getClassIndex();	str = constant_pool.constantToString(c);	index = c.getNameAndTypeIndex();      }      else {	ConstantMethodref c = (ConstantMethodref)constant_pool.getConstant(m_index, CONSTANT_Methodref);	class_index = c.getClassIndex();				str  = constant_pool.constantToString(c);	index = c.getNameAndTypeIndex();      }	  		      name = Class2HTML.referenceClass(class_index);      str = Class2HTML.toHTML(constant_pool.constantToString(constant_pool.getConstant(index, CONSTANT_NameAndType)));      // Get signature, i.e., types      ConstantNameAndType c2 = (ConstantNameAndType)constant_pool.	getConstant(index, CONSTANT_NameAndType);      signature = constant_pool.constantToString(c2.getSignatureIndex(),						 CONSTANT_Utf8);      String[] args = Utility.methodSignatureArgumentTypes(signature, false);      String   type = Utility.methodSignatureReturnType(signature, false);      buf.append(name + ".<A HREF=\"" + class_name + "_cp.html#cp" + m_index + 		 "\" TARGET=ConstantPool>" + str + "</A>" + "(");      // List arguments      for(int i=0; i < args.length; i++) {	buf.append(Class2HTML.referenceType(args[i]));	  	if(i < args.length - 1)	  buf.append(", ");      }      // Attach return type      buf.append("):" + Class2HTML.referenceType(type));      break;		      /* Operands are references to items in constant pool       */    case LDC_W: case LDC2_W:      index = bytes.readShort();      buf.append("<A HREF=\"" + class_name + "_cp.html#cp" + index + 		 "\" TARGET=\"ConstantPool\">" +		 Class2HTML.toHTML(constant_pool.constantToString(index, 								  constant_pool.								  getConstant(index).getTag()))+		 "</a>");      break;    case LDC:      index = bytes.readUnsignedByte();      buf.append("<A HREF=\"" + class_name + "_cp.html#cp" + index + 		 "\" TARGET=\"ConstantPool\">" +		 Class2HTML.toHTML(constant_pool.constantToString(index, 								  constant_pool.								  getConstant(index).getTag()))+		 "</a>");
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