Java example source code file (CodeHTML.java)
The CodeHTML.java Java example source code
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package com.sun.org.apache.bcel.internal.util;
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2001 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
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* distribution.
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* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" and
* "Apache BCEL" must not be used to endorse or promote products
* derived from this software without prior written permission. For
* written permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* "Apache BCEL", nor may "Apache" appear in their name, without
* prior written permission of the Apache Software Foundation.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
import com.sun.org.apache.bcel.internal.classfile.*;
import java.io.*;
import java.util.BitSet;
/**
* Convert code into HTML file.
*
* @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm
*
*/
final class CodeHTML implements com.sun.org.apache.bcel.internal.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>");
for(int i=0; i < methods.length; i++)
writeMethod(methods[i], i);
file.println("</BODY>");
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, 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] + " | "); /* 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> | |
- \n");
for(int i=0; i < attributes.length; i++) {
byte tag = attributes[i].getTag();
if(tag != ATTR_UNKNOWN)
file.print("<LI>\n");
else
file.print("<LI>" + attributes[i] + "");
if(tag == ATTR_CODE) {
c = (Code)attributes[i];
Attribute[] attributes2 = c.getAttributes();
code = c.getCode();
file.print("<UL>");
for(int j=0; j < attributes2.length; j++) {
tag = attributes2[j].getTag();
file.print("<LI>\n");
}
file.print("</UL>");
}
}
file.println("</UL>");
}
if(code != null) { // No code, an abstract method, e.g.
//System.out.println(name + "\n" + Utility.codeToString(code, constant_pool, 0, -1));
// Print the byte code
ByteSequence stream = new ByteSequence(code);
stream.mark(stream.available());
findGotos(stream, method, c);
stream.reset();
file.println("<TABLE BORDER=0>
offset
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