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1 package org.apache.bcel.util; 2 3 /* ==================================================================== 4 * The Apache Software License, Version 1.1 5 * 6 * Copyright (c) 2001 The Apache Software Foundation. All rights 7 * reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 21 * 3. The end-user documentation included with the redistribution, 22 * if any, must include the following acknowledgment: 23 * "This product includes software developed by the 24 * Apache Software Foundation (http://www.apache.org/)." 25 * Alternately, this acknowledgment may appear in the software itself, 26 * if and wherever such third-party acknowledgments normally appear. 27 * 28 * 4. The names "Apache" and "Apache Software Foundation" and 29 * "Apache BCEL" must not be used to endorse or promote products 30 * derived from this software without prior written permission. For 31 * written permission, please contact apache@apache.org. 32 * 33 * 5. Products derived from this software may not be called "Apache", 34 * "Apache BCEL", nor may "Apache" appear in their name, without 35 * prior written permission of the Apache Software Foundation. 36 * 37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 40 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 44 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 47 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 48 * SUCH DAMAGE. 49 * ==================================================================== 50 * 51 * This software consists of voluntary contributions made by many 52 * individuals on behalf of the Apache Software Foundation. For more 53 * information on the Apache Software Foundation, please see 54 * <http://www.apache.org/>;. 55 */ 56 57 import org.apache.bcel.classfile.*; 58 import java.io.*; 59 60 /*** 61 * Convert found attributes into HTML file. 62 * 63 * @version $Id: AttributeHTML.java,v 1.2 2002/06/04 11:16:21 mdahm Exp $ 64 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> 65 * 66 */ 67 final class AttributeHTML implements org.apache.bcel.Constants { 68 private String class_name; // name of current class 69 private PrintWriter file; // file to write to 70 private int attr_count = 0; 71 private ConstantHTML constant_html; 72 private ConstantPool constant_pool; 73 74 AttributeHTML(String dir, String class_name, ConstantPool constant_pool, 75 ConstantHTML constant_html) throws IOException 76 { 77 this.class_name = class_name; 78 this.constant_pool = constant_pool; 79 this.constant_html = constant_html; 80 81 file = new PrintWriter(new FileOutputStream(dir + class_name + "_attributes.html")); 82 file.println("<HTML><BODY BGCOLOR=\"#C0C0C0\"><TABLE BORDER=0>"); 83 } 84 85 private final String codeLink(int link, int method_number) { 86 return "<A HREF=\"" + class_name + "_code.html#code" + 87 method_number + "@" + link + "\" TARGET=Code>" + 88 link + "</A>"; 89 } 90 91 final void close() { 92 file.println("</TABLE></BODY></HTML>"); 93 file.close(); 94 } 95 96 final void writeAttribute(Attribute attribute, String anchor) throws IOException { 97 writeAttribute(attribute, anchor, 0); 98 } 99 100 final void writeAttribute(Attribute attribute, String anchor, int method_number) throws IOException { 101 byte tag = attribute.getTag(); 102 int index; 103 104 if(tag == ATTR_UNKNOWN) // Don't know what to do about this one 105 return; 106 107 attr_count++; // Increment number of attributes found so far 108 109 if(attr_count % 2 == 0) 110 file.print("<TR BGCOLOR=\"#C0C0C0\"><TD>"); 111 else 112 file.print("<TR BGCOLOR=\"#A0A0A0\"><TD>"); 113 114 file.println("<H4><A NAME=\"" + anchor + "\">" + attr_count + " " + ATTRIBUTE_NAMES[tag] + "</A></H4>"); 115 116 /* Handle different attributes 117 */ 118 switch(tag) { 119 case ATTR_CODE: 120 Code c = (Code)attribute; 121 122 // Some directly printable values 123 file.print("<UL><LI>Maximum stack size = " + c.getMaxStack() + 124 "</LI>\n<LI>Number of local variables = " + 125 c.getMaxLocals() + "</LI>\n<LI><A HREF=\"" + class_name + 126 "_code.html#method" + method_number + "\" TARGET=Code>Byte code</A></LI></UL>\n"); 127 128 // Get handled exceptions and list them 129 CodeException[] ce = c.getExceptionTable(); 130 int len = ce.length; 131 132 if(len > 0) { 133 file.print("<P><B>Exceptions handled</B><UL>"); 134 135 for(int i=0; i < len; i++) { 136 int catch_type = ce[i].getCatchType(); // Index in constant pool 137 138 file.print("<LI>"); 139 140 if(catch_type != 0) 141 file.print(constant_html.referenceConstant(catch_type)); // Create Link to _cp.html 142 else 143 file.print("Any Exception"); 144 145 file.print("<BR>(Ranging from lines " + codeLink(ce[i].getStartPC(), method_number) + 146 " to " + codeLink(ce[i].getEndPC(), method_number) + ", handled at line " + 147 codeLink(ce[i].getHandlerPC(), method_number) + ")</LI>"); 148 } 149 file.print("</UL>"); 150 } 151 break; 152 153 case ATTR_CONSTANT_VALUE: 154 index = ((ConstantValue)attribute).getConstantValueIndex(); 155 156 // Reference _cp.html 157 file.print("<UL><LI><A HREF=\"" + class_name + "_cp.html#cp" + index + 158 "\" TARGET=\"ConstantPool\">Constant value index(" + index +")</A></UL>\n"); 159 break; 160 161 case ATTR_SOURCE_FILE: 162 index = ((SourceFile)attribute).getSourceFileIndex(); 163 164 // Reference _cp.html 165 file.print("<UL><LI><A HREF=\"" + class_name + "_cp.html#cp" + index + 166 "\" TARGET=\"ConstantPool\">Source file index(" + index +")</A></UL>\n"); 167 break; 168 169 case ATTR_EXCEPTIONS: 170 // List thrown exceptions 171 int[] indices = ((ExceptionTable)attribute).getExceptionIndexTable(); 172 173 file.print("<UL>"); 174 175 for(int i=0; i < indices.length; i++) 176 file.print("<LI><A HREF=\"" + class_name + "_cp.html#cp" + indices[i] + 177 "\" TARGET=\"ConstantPool\">Exception class index(" + indices[i] + ")</A>\n"); 178 179 file.print("</UL>\n"); 180 break; 181 182 case ATTR_LINE_NUMBER_TABLE: 183 LineNumber[] line_numbers =((LineNumberTable)attribute).getLineNumberTable(); 184 185 // List line number pairs 186 file.print("<P>"); 187 188 for(int i=0; i < line_numbers.length; i++) { 189 file.print("(" + line_numbers[i].getStartPC() + ", " + line_numbers[i].getLineNumber() + ")"); 190 191 if(i < line_numbers.length - 1) 192 file.print(", "); // breakable 193 } 194 break; 195 196 case ATTR_LOCAL_VARIABLE_TABLE: 197 LocalVariable[] vars = ((LocalVariableTable)attribute).getLocalVariableTable(); 198 199 // List name, range and type 200 file.print("<UL>"); 201 202 for(int i=0; i < vars.length; i++) { 203 index = vars[i].getSignatureIndex(); 204 String signature = ((ConstantUtf8)constant_pool.getConstant(index, CONSTANT_Utf8)).getBytes(); 205 signature = Utility.signatureToString(signature, false); 206 int start = vars[i].getStartPC(); 207 int end = (start + vars[i].getLength()); 208 209 file.println("<LI>" + Class2HTML.referenceType(signature) + 210 " <B>" + vars[i].getName() + "</B> in slot %" + vars[i].getIndex() + 211 "<BR>Valid from lines " + 212 "<A HREF=\"" + class_name + "_code.html#code" + method_number + "@" + start + "\" TARGET=Code>" + 213 start + "</A> to " + 214 "<A HREF=\"" + class_name + "_code.html#code" + method_number + "@" + end + "\" TARGET=Code>" + 215 end + "</A></LI>"); 216 } 217 file.print("</UL>\n"); 218 219 break; 220 221 case ATTR_INNER_CLASSES: 222 InnerClass[] classes = ((InnerClasses)attribute).getInnerClasses(); 223 224 // List inner classes 225 file.print("<UL>"); 226 227 for(int i=0; i < classes.length; i++) { 228 String name, access; 229 230 index = classes[i].getInnerNameIndex(); 231 if(index > 0) 232 name =((ConstantUtf8)constant_pool.getConstant(index, CONSTANT_Utf8)).getBytes(); 233 else 234 name = "<anonymous>"; 235 236 access = Utility.accessToString(classes[i].getInnerAccessFlags()); 237 238 file.print("<LI><FONT COLOR=\"#FF0000\">" + access + "</FONT> "+ 239 constant_html.referenceConstant(classes[i].getInnerClassIndex()) + 240 " in class " + 241 constant_html.referenceConstant(classes[i].getOuterClassIndex()) + 242 " named " + name + "</LI>\n"); 243 } 244 245 file.print("</UL>\n"); 246 break; 247 248 default: // Such as Unknown attribute or Deprecated 249 file.print("<P>" + attribute.toString()); 250 } 251 252 file.println("</TD></TR>"); 253 file.flush(); 254 } 255 }

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