Example #1
0
  /**
   * Override this method to create you own classes on the fly. The name contains the special token
   * $$BCEL$$. Everything before that token is consddered to be a package name. You can encode you
   * own arguments into the subsequent string. You must regard however not to use any "illegal"
   * characters, i.e., characters that may not appear in a Java class name too<br>
   * The default implementation interprets the string as a encoded compressed Java class, unpacks
   * and decodes it with the Utility.decode() method, and parses the resulting byte array and
   * returns the resulting JavaClass object.
   *
   * @param class_name compressed byte code with "$$BCEL$$" in it
   */
  protected JavaClass createClass(String class_name) {
    int index = class_name.indexOf("$$BCEL$$");
    String real_name = class_name.substring(index + 8);

    JavaClass clazz = null;
    try {
      byte[] bytes = Utility.decode(real_name, true);
      ClassParser parser = new ClassParser(new ByteArrayInputStream(bytes), "foo");

      clazz = parser.parse();
    } catch (Throwable e) {
      e.printStackTrace();
      return null;
    }

    // Adapt the class name to the passed value
    ConstantPool cp = clazz.getConstantPool();

    ConstantClass cl =
        (ConstantClass) cp.getConstant(clazz.getClassNameIndex(), Constants.CONSTANT_Class);
    ConstantUtf8 name = (ConstantUtf8) cp.getConstant(cl.getNameIndex(), Constants.CONSTANT_Utf8);
    name.setBytes(class_name.replace('.', '/'));

    return clazz;
  }
Example #2
0
  /**
   * Return string representation close to declaration format, `public static final short MAX =
   * 100', e.g..
   *
   * @return String representation of field
   */
  public final String toString() {
    String name, signature, access; // Short cuts to constant pool

    access = Utility.accessToString(access_flags);
    access = access.equals("") ? "" : (access + " ");
    signature = type.toString();
    name = getName();

    StringBuffer buf = new StringBuffer(access + signature + " " + name);
    String value = getInitValue();

    if (value != null) buf.append(" = " + value);

    return buf.toString();
  }
  final void writeAttribute(Attribute attribute, String anchor, int method_number)
      throws IOException {
    byte tag = attribute.getTag();
    int index;

    if (tag == ATTR_UNKNOWN) // Don't know what to do about this one
    return;

    attr_count++; // Increment number of attributes found so far

    if (attr_count % 2 == 0) file.print("<TR BGCOLOR=\"#C0C0C0\"><TD>");
    else file.print("<TR BGCOLOR=\"#A0A0A0\"><TD>");

    file.println(
        "<H4><A NAME=\"" + anchor + "\">" + attr_count + " " + ATTRIBUTE_NAMES[tag] + "</A></H4>");

    /* Handle different attributes
     */
    switch (tag) {
      case ATTR_CODE:
        Code c = (Code) attribute;

        // Some directly printable values
        file.print(
            "<UL><LI>Maximum stack size = "
                + c.getMaxStack()
                + "</LI>\n<LI>Number of local variables = "
                + c.getMaxLocals()
                + "</LI>\n<LI><A HREF=\""
                + class_name
                + "_code.html#method"
                + method_number
                + "\" TARGET=Code>Byte code</A></LI></UL>\n");

        // Get handled exceptions and list them
        CodeException[] ce = c.getExceptionTable();
        int len = ce.length;

        if (len > 0) {
          file.print("<P><B>Exceptions handled</B><UL>");

          for (int i = 0; i < len; i++) {
            int catch_type = ce[i].getCatchType(); // Index in constant pool

            file.print("<LI>");

            if (catch_type != 0)
              file.print(constant_html.referenceConstant(catch_type)); // Create Link to _cp.html
            else file.print("Any Exception");

            file.print(
                "<BR>(Ranging from lines "
                    + codeLink(ce[i].getStartPC(), method_number)
                    + " to "
                    + codeLink(ce[i].getEndPC(), method_number)
                    + ", handled at line "
                    + codeLink(ce[i].getHandlerPC(), method_number)
                    + ")</LI>");
          }
          file.print("</UL>");
        }
        break;

      case ATTR_CONSTANT_VALUE:
        index = ((ConstantValue) attribute).getConstantValueIndex();

        // Reference _cp.html
        file.print(
            "<UL><LI><A HREF=\""
                + class_name
                + "_cp.html#cp"
                + index
                + "\" TARGET=\"ConstantPool\">Constant value index("
                + index
                + ")</A></UL>\n");
        break;

      case ATTR_SOURCE_FILE:
        index = ((SourceFile) attribute).getSourceFileIndex();

        // Reference _cp.html
        file.print(
            "<UL><LI><A HREF=\""
                + class_name
                + "_cp.html#cp"
                + index
                + "\" TARGET=\"ConstantPool\">Source file index("
                + index
                + ")</A></UL>\n");
        break;

      case ATTR_EXCEPTIONS:
        // List thrown exceptions
        int[] indices = ((ExceptionTable) attribute).getExceptionIndexTable();

        file.print("<UL>");

        for (int i = 0; i < indices.length; i++)
          file.print(
              "<LI><A HREF=\""
                  + class_name
                  + "_cp.html#cp"
                  + indices[i]
                  + "\" TARGET=\"ConstantPool\">Exception class index("
                  + indices[i]
                  + ")</A>\n");

        file.print("</UL>\n");
        break;

      case ATTR_LINE_NUMBER_TABLE:
        LineNumber[] line_numbers = ((LineNumberTable) attribute).getLineNumberTable();

        // List line number pairs
        file.print("<P>");

        for (int i = 0; i < line_numbers.length; i++) {
          file.print(
              "("
                  + line_numbers[i].getStartPC()
                  + ",&nbsp;"
                  + line_numbers[i].getLineNumber()
                  + ")");

          if (i < line_numbers.length - 1) file.print(", "); // breakable
        }
        break;

      case ATTR_LOCAL_VARIABLE_TABLE:
        LocalVariable[] vars = ((LocalVariableTable) attribute).getLocalVariableTable();

        // List name, range and type
        file.print("<UL>");

        for (int i = 0; i < vars.length; i++) {
          index = vars[i].getSignatureIndex();
          String signature =
              ((ConstantUtf8) constant_pool.getConstant(index, CONSTANT_Utf8)).getBytes();
          signature = Utility.signatureToString(signature, false);
          int start = vars[i].getStartPC();
          int end = (start + vars[i].getLength());

          file.println(
              "<LI>"
                  + Class2HTML.referenceType(signature)
                  + "&nbsp;<B>"
                  + vars[i].getName()
                  + "</B> in slot %"
                  + vars[i].getIndex()
                  + "<BR>Valid from lines "
                  + "<A HREF=\""
                  + class_name
                  + "_code.html#code"
                  + method_number
                  + "@"
                  + start
                  + "\" TARGET=Code>"
                  + start
                  + "</A> to "
                  + "<A HREF=\""
                  + class_name
                  + "_code.html#code"
                  + method_number
                  + "@"
                  + end
                  + "\" TARGET=Code>"
                  + end
                  + "</A></LI>");
        }
        file.print("</UL>\n");

        break;

      case ATTR_INNER_CLASSES:
        InnerClass[] classes = ((InnerClasses) attribute).getInnerClasses();

        // List inner classes
        file.print("<UL>");

        for (int i = 0; i < classes.length; i++) {
          String name, access;

          index = classes[i].getInnerNameIndex();
          if (index > 0)
            name = ((ConstantUtf8) constant_pool.getConstant(index, CONSTANT_Utf8)).getBytes();
          else name = "&lt;anonymous&gt;";

          access = Utility.accessToString(classes[i].getInnerAccessFlags());

          file.print(
              "<LI><FONT COLOR=\"#FF0000\">"
                  + access
                  + "</FONT> "
                  + constant_html.referenceConstant(classes[i].getInnerClassIndex())
                  + " in&nbsp;class "
                  + constant_html.referenceConstant(classes[i].getOuterClassIndex())
                  + " named "
                  + name
                  + "</LI>\n");
        }

        file.print("</UL>\n");
        break;

      default: // Such as Unknown attribute or Deprecated
        file.print("<P>" + attribute.toString());
    }

    file.println("</TD></TR>");
    file.flush();
  }
  private void writeConstant(int index) {
    byte tag = constants[index].getTag();
    int class_index, name_index;
    String ref;

    // The header is always the same
    file.println("<H4> <A NAME=cp" + index + ">" + index + "</A> " + CONSTANT_NAMES[tag] + "</H4>");

    /* For every constant type get the needed parameters and print them appropiately
     */
    switch (tag) {
      case CONSTANT_InterfaceMethodref:
      case CONSTANT_Methodref:
        // Get class_index and name_and_type_index, depending on type
        if (tag == CONSTANT_Methodref) {
          ConstantMethodref c =
              (ConstantMethodref) constant_pool.getConstant(index, CONSTANT_Methodref);
          class_index = c.getClassIndex();
          name_index = c.getNameAndTypeIndex();
        } else {
          ConstantInterfaceMethodref c1 =
              (ConstantInterfaceMethodref)
                  constant_pool.getConstant(index, CONSTANT_InterfaceMethodref);
          class_index = c1.getClassIndex();
          name_index = c1.getNameAndTypeIndex();
        }

        // Get method name and its class
        String method_name = constant_pool.constantToString(name_index, CONSTANT_NameAndType);
        String html_method_name = Class2HTML.toHTML(method_name);

        // Partially compacted class name, i.e., / -> .
        String method_class = constant_pool.constantToString(class_index, CONSTANT_Class);
        String short_method_class =
            Utility.compactClassName(method_class); // I.e., remove java.lang.
        short_method_class = Utility.compactClassName(method_class); // I.e., remove java.lang.
        short_method_class =
            Utility.compactClassName(
                short_method_class, class_package + ".", true); // Remove class package prefix

        // Get method signature
        ConstantNameAndType c2 =
            (ConstantNameAndType) constant_pool.getConstant(name_index, CONSTANT_NameAndType);
        String signature = constant_pool.constantToString(c2.getSignatureIndex(), CONSTANT_Utf8);
        // Get array of strings containing the argument types
        String[] args = Utility.methodSignatureArgumentTypes(signature, false);

        // Get return type string
        String type = Utility.methodSignatureReturnType(signature, false);
        String ret_type = Class2HTML.referenceType(type);

        StringBuffer buf = new StringBuffer("(");
        for (int i = 0; i < args.length; i++) {
          buf.append(Class2HTML.referenceType(args[i]));
          if (i < args.length - 1) buf.append(",&nbsp;");
        }
        buf.append(")");

        String arg_types = buf.toString();

        if (method_class.equals(class_name)) // Method is local to class
        ref =
              "<A HREF=\""
                  + class_name
                  + "_code.html#method"
                  + getMethodNumber(method_name + signature)
                  + "\" TARGET=Code>"
                  + html_method_name
                  + "</A>";
        else
          ref =
              "<A HREF=\""
                  + method_class
                  + ".html"
                  + "\" TARGET=_top>"
                  + short_method_class
                  + "</A>."
                  + html_method_name;

        constant_ref[index] =
            ret_type
                + "&nbsp;<A HREF=\""
                + class_name
                + "_cp.html#cp"
                + class_index
                + "\" TARGET=Constants>"
                + short_method_class
                + "</A>.<A HREF=\""
                + class_name
                + "_cp.html#cp"
                + index
                + "\" TARGET=ConstantPool>"
                + html_method_name
                + "</A>&nbsp;"
                + arg_types;

        file.println(
            "<P><TT>"
                + ret_type
                + "&nbsp;"
                + ref
                + arg_types
                + "&nbsp;</TT>\n<UL>"
                + "<LI><A HREF=\"#cp"
                + class_index
                + "\">Class index("
                + class_index
                + ")</A>\n"
                + "<LI><A HREF=\"#cp"
                + name_index
                + "\">NameAndType index("
                + name_index
                + ")</A></UL>");
        break;

      case CONSTANT_Fieldref:
        // Get class_index and name_and_type_index
        ConstantFieldref c3 =
            (ConstantFieldref) constant_pool.getConstant(index, CONSTANT_Fieldref);
        class_index = c3.getClassIndex();
        name_index = c3.getNameAndTypeIndex();

        // Get method name and its class (compacted)
        String field_class = constant_pool.constantToString(class_index, CONSTANT_Class);
        String short_field_class = Utility.compactClassName(field_class); // I.e., remove java.lang.
        short_field_class =
            Utility.compactClassName(
                short_field_class, class_package + ".", true); // Remove class package prefix

        String field_name = constant_pool.constantToString(name_index, CONSTANT_NameAndType);

        if (field_class.equals(class_name)) // Field is local to class
        ref =
              "<A HREF=\""
                  + field_class
                  + "_methods.html#field"
                  + field_name
                  + "\" TARGET=Methods>"
                  + field_name
                  + "</A>";
        else
          ref =
              "<A HREF=\""
                  + field_class
                  + ".html\" TARGET=_top>"
                  + short_field_class
                  + "</A>."
                  + field_name
                  + "\n";

        constant_ref[index] =
            "<A HREF=\""
                + class_name
                + "_cp.html#cp"
                + class_index
                + "\" TARGET=Constants>"
                + short_field_class
                + "</A>.<A HREF=\""
                + class_name
                + "_cp.html#cp"
                + index
                + "\" TARGET=ConstantPool>"
                + field_name
                + "</A>";

        file.println(
            "<P><TT>"
                + ref
                + "</TT><BR>\n"
                + "<UL>"
                + "<LI><A HREF=\"#cp"
                + class_index
                + "\">Class("
                + class_index
                + ")</A><BR>\n"
                + "<LI><A HREF=\"#cp"
                + name_index
                + "\">NameAndType("
                + name_index
                + ")</A></UL>");
        break;

      case CONSTANT_Class:
        ConstantClass c4 = (ConstantClass) constant_pool.getConstant(index, CONSTANT_Class);
        name_index = c4.getNameIndex();
        String class_name2 = constant_pool.constantToString(index, tag); // / -> .
        String short_class_name = Utility.compactClassName(class_name2); // I.e., remove java.lang.
        short_class_name =
            Utility.compactClassName(
                short_class_name, class_package + ".", true); // Remove class package prefix

        ref = "<A HREF=\"" + class_name2 + ".html\" TARGET=_top>" + short_class_name + "</A>";
        constant_ref[index] =
            "<A HREF=\""
                + class_name
                + "_cp.html#cp"
                + index
                + "\" TARGET=ConstantPool>"
                + short_class_name
                + "</A>";

        file.println(
            "<P><TT>"
                + ref
                + "</TT><UL>"
                + "<LI><A HREF=\"#cp"
                + name_index
                + "\">Name index("
                + name_index
                + ")</A></UL>\n");
        break;

      case CONSTANT_String:
        ConstantString c5 = (ConstantString) constant_pool.getConstant(index, CONSTANT_String);
        name_index = c5.getStringIndex();

        String str = Class2HTML.toHTML(constant_pool.constantToString(index, tag));

        file.println(
            "<P><TT>"
                + str
                + "</TT><UL>"
                + "<LI><A HREF=\"#cp"
                + name_index
                + "\">Name index("
                + name_index
                + ")</A></UL>\n");
        break;

      case CONSTANT_NameAndType:
        ConstantNameAndType c6 =
            (ConstantNameAndType) constant_pool.getConstant(index, CONSTANT_NameAndType);
        name_index = c6.getNameIndex();
        int signature_index = c6.getSignatureIndex();

        file.println(
            "<P><TT>"
                + Class2HTML.toHTML(constant_pool.constantToString(index, tag))
                + "</TT><UL>"
                + "<LI><A HREF=\"#cp"
                + name_index
                + "\">Name index("
                + name_index
                + ")</A>\n"
                + "<LI><A HREF=\"#cp"
                + signature_index
                + "\">Signature index("
                + signature_index
                + ")</A></UL>\n");
        break;

      default:
        file.println(
            "<P><TT>" + Class2HTML.toHTML(constant_pool.constantToString(index, tag)) + "</TT>\n");
    } // switch
  }