src/main/java/eu/svjatoslav/inspector/java/structure/ClassDescriptor.java

   1 /*
   2  * JavaInspect - Utility to visualize java software
   3  * Copyright (C) 2013, Svjatoslav Agejenko, svjatoslav@svjatoslav.eu
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of version 2 of the GNU General Public License
   7  * as published by the Free Software Foundation.
   8  */
   9
  10 package eu.svjatoslav.inspector.java.structure;
  11
  12 import java.lang.reflect.Field;
  13 import java.lang.reflect.Method;
  14 import java.util.ArrayList;
  15 import java.util.List;
  16 import java.util.Map;
  17 import java.util.SortedSet;
  18 import java.util.TreeMap;
  19 import java.util.TreeSet;
  20
  21 /**
  22  * Describes single class instance
  23  */
  24 public class ClassDescriptor implements GraphElement {
  25
  26         private static final int MAX_REFERECNES_COUNT = 10;
  27
  28         public final String fullyQualifiedName;
  29
  30         Map<String, FieldDescriptor> nameToFieldMap = new TreeMap<String, FieldDescriptor>();
  31
  32         public SortedSet<MethodDescriptor> methods = new TreeSet<MethodDescriptor>();
  33
  34         /**
  35          * Incoming arrows will have this color.
  36          */
  37         private String distinctiveReferenceColor;
  38
  39         private String interfaceColor;
  40
  41         private String superClassColor;
  42
  43         boolean isEnum;
  44
  45         boolean isInterface;
  46
  47         boolean isArray;
  48
  49         private boolean isShown = true;
  50
  51         private final ClassGraph classGraph;
  52
  53         List<ClassDescriptor> interfaces = new ArrayList<ClassDescriptor>();
  54
  55         ClassDescriptor superClass;
  56
  57         /**
  58          * Amount of field and method references pointing to this class.
  59          */
  60         private int referencesCount = 0;
  61
  62         // for interface, counts amount of found implementations
  63         private int implementationsCount = 0;
  64
  65         // counts amount of times this class is extended
  66         private int extensionsCount = 0;
  67
  68         public ClassDescriptor(final Class<? extends Object> clazz,
  69                         final ClassGraph dump) {
  70                 classGraph = dump;
  71
  72                 fullyQualifiedName = clazz.getName();
  73                 dump.nameToClassMap.put(fullyQualifiedName, this);
  74
  75                 isArray = clazz.isArray();
  76
  77                 if (isArray) {
  78                         final Class<?> componentType = clazz.getComponentType();
  79                         dump.addClass(componentType);
  80                 }
  81
  82                 // System.out.println("class: " + fullyQualifiedName);
  83
  84                 isEnum = clazz.isEnum();
  85
  86                 isInterface = clazz.isInterface();
  87
  88                 if (!isVisible())
  89                         return;
  90
  91                 indexFields(clazz.getDeclaredFields());
  92                 indexFields(clazz.getFields());
  93
  94                 indexMethods(clazz);
  95
  96                 for (final Class interfaceClass : clazz.getInterfaces()) {
  97                         final ClassDescriptor classDescriptor = dump
  98                                         .addClass(interfaceClass);
  99                         classDescriptor.registerImplementation();
 100                         interfaces.add(classDescriptor);
 101                 }
 102
 103                 superClass = dump.addClass(clazz.getSuperclass());
 104                 if (superClass != null)
 105                         superClass.registerExtension();
 106
 107         }
 108
 109         public boolean areReferencesShown() {
 110                 return referencesCount <= MAX_REFERECNES_COUNT;
 111         }
 112
 113         public void enlistFieldReferences(final StringBuffer result) {
 114                 if (nameToFieldMap.isEmpty())
 115                         return;
 116
 117                 result.append("\n");
 118                 result.append("    // field references to other classes\n");
 119                 for (final Map.Entry<String, FieldDescriptor> entry : nameToFieldMap
 120                                 .entrySet())
 121                         result.append(entry.getValue().getDot());
 122         }
 123
 124         public void enlistFields(final StringBuffer result) {
 125                 if (nameToFieldMap.isEmpty())
 126                         return;
 127
 128                 result.append("\n");
 129                 result.append("    // fields:\n");
 130
 131                 // enlist fields
 132                 for (final Map.Entry<String, FieldDescriptor> entry : nameToFieldMap
 133                                 .entrySet())
 134                         result.append(entry.getValue().getEmbeddedDot());
 135         }
 136
 137         public void enlistImplementedInterfaces(final StringBuffer result) {
 138                 if (interfaces.isEmpty())
 139                         return;
 140
 141                 result.append("\n");
 142                 result.append("    // interfaces implemented by class: "
 143                                 + fullyQualifiedName + "\n");
 144
 145                 for (final ClassDescriptor interfaceDescriptor : interfaces) {
 146                         if (!interfaceDescriptor.isVisible())
 147                                 continue;
 148
 149                         result.append("    " + interfaceDescriptor.getGraphId() + " -> "
 150                                         + getGraphId() + "[style=\"dotted, tapered\", color=\""
 151                                         + interfaceDescriptor.getInterfaceColor()
 152                                         + "\", penwidth=20, dir=\"forward\"];\n");
 153                 }
 154         }
 155
 156         public void enlistMethodReferences(final StringBuffer result) {
 157                 if (methods.isEmpty())
 158                         return;
 159
 160                 result.append("\n");
 161                 result.append("    // method references to other classes\n");
 162                 for (final MethodDescriptor methodDescriptor : methods)
 163                         result.append(methodDescriptor.getDot());
 164         }
 165
 166         public void enlistMethods(final StringBuffer result) {
 167                 if (methods.isEmpty())
 168                         return;
 169
 170                 result.append("\n");
 171                 result.append("    // methods:\n");
 172
 173                 // enlist methods
 174                 for (final MethodDescriptor methodDescriptor : methods)
 175                         result.append(methodDescriptor.getEmbeddedDot());
 176         }
 177
 178         public void enlistSuperClass(final StringBuffer result) {
 179                 if (superClass == null)
 180                         return;
 181
 182                 if (!superClass.isVisible())
 183                         return;
 184
 185                 result.append("\n");
 186                 result.append("    // super class for: " + fullyQualifiedName + "\n");
 187
 188                 result.append("    " + superClass.getGraphId() + " -> " + getGraphId()
 189                                 + "[style=\"tapered\", color=\""
 190                                 + superClass.getSuperClassColor()
 191                                 + "\", penwidth=10, dir=\"forward\"];\n");
 192         }
 193
 194         public void generateDotHeader(final StringBuffer result) {
 195                 result.append("\n");
 196                 result.append("// Class: " + fullyQualifiedName + "\n");
 197
 198                 result.append("    " + getGraphId() + "[label=<<TABLE "
 199                                 + getBackgroundColor() + " BORDER=\"" + getBorderWidth()
 200                                 + "\" CELLBORDER=\"1\" CELLSPACING=\"0\">\n");
 201
 202                 result.append("\n");
 203                 result.append("    // class descriptor header\n");
 204                 result.append("    <TR><TD colspan=\"2\" PORT=\"f0\">"
 205                                 + "<FONT POINT-SIZE=\"8.0\" >" + getPackageName()
 206                                 + "</FONT><br/>");
 207
 208                 final String parentClassesName = getParentClassesName();
 209                 if (parentClassesName.length() > 0)
 210                         result.append("<FONT POINT-SIZE=\"12.0\"><B>" + parentClassesName
 211                                         + "</B></FONT><br/>\n");
 212
 213                 result.append("<FONT POINT-SIZE=\"25.0\"><B>" + getClassName(false)
 214                                 + "</B></FONT>" + "</TD></TR>\n");
 215         }
 216
 217         public List<FieldDescriptor> getAllFields() {
 218                 final List<FieldDescriptor> result = new ArrayList<FieldDescriptor>();
 219
 220                 for (final Map.Entry<String, FieldDescriptor> entry : nameToFieldMap
 221                                 .entrySet())
 222                         result.add(entry.getValue());
 223
 224                 return result;
 225         }
 226
 227         public String getBackgroundColor() {
 228                 String bgColor = "";
 229
 230                 if (isEnum)
 231                         bgColor = "bgcolor=\"navajowhite2\"";
 232
 233                 if (isInterface)
 234                         bgColor = "bgcolor=\"darkslategray1\"";
 235
 236                 return bgColor;
 237         }
 238
 239         public String getBorderWidth() {
 240
 241                 if (!areReferencesShown())
 242                         return "4";
 243                 return "1";
 244         }
 245
 246         public String getClassName(final boolean differentiateArray) {
 247                 // this is needed for nested classes
 248                 final String actualClassName = fullyQualifiedName.replace('$', '.');
 249
 250                 final int i = actualClassName.lastIndexOf('.');
 251
 252                 String result = actualClassName.substring(i + 1);
 253
 254                 if (isArray)
 255                         result = result.substring(0, result.length() - 1);
 256
 257                 if (differentiateArray)
 258                         if (isArray)
 259                                 result += " []";
 260
 261                 // this is needed for nested classes
 262                 // result = result.replace('$', '.');
 263                 return result;
 264         }
 265
 266         public String getColor() {
 267                 if (getDistinctiveColor() == null)
 268                         setDistinctiveColor(Utils.getNextDarkColor());
 269
 270                 return getDistinctiveColor();
 271         }
 272
 273         public String getDistinctiveColor() {
 274                 return distinctiveReferenceColor;
 275         }
 276
 277         @Override
 278         public String getDot() {
 279                 if (!isVisible())
 280                         return "";
 281
 282                 if (isArray)
 283                         return "";
 284
 285                 final StringBuffer result = new StringBuffer();
 286
 287                 generateDotHeader(result);
 288
 289                 enlistFields(result);
 290
 291                 enlistMethods(result);
 292
 293                 result.append("    </TABLE>>, shape=\"none\"];\n");
 294
 295                 enlistFieldReferences(result);
 296
 297                 enlistMethodReferences(result);
 298
 299                 enlistImplementedInterfaces(result);
 300
 301                 enlistSuperClass(result);
 302
 303                 return result.toString();
 304         }
 305
 306         @Override
 307         public String getEmbeddedDot() {
 308                 return null;
 309         }
 310
 311         @Override
 312         public String getGraphId() {
 313                 final String result = "class_"
 314                                 + fullyQualifiedName.replace('.', '_').replace(";", "")
 315                                                 .replace("[L", "").replace('$', '_');
 316                 return result;
 317         }
 318
 319         public String getInterfaceColor() {
 320                 if (interfaceColor == null)
 321                         interfaceColor = Utils.getNextLightColor();
 322
 323                 return interfaceColor;
 324         }
 325
 326         private int getOutgoingReferencesCount() {
 327                 int result = 0;
 328
 329                 // count method references
 330                 for (final MethodDescriptor methodDescriptor : methods)
 331                         result += methodDescriptor.getOutsideVisibleReferencesCount();
 332
 333                 // count field references
 334                 for (final FieldDescriptor fieldDescriptor : nameToFieldMap.values())
 335                         result += fieldDescriptor.getOutsideVisibleReferencesCount();
 336
 337                 // count implemented interfaces
 338                 for (final ClassDescriptor classDescriptor : interfaces)
 339                         if (classDescriptor.isVisible())
 340                                 result++;
 341
 342                 // count superclass
 343                 if (superClass != null)
 344                         if (superClass.isVisible())
 345                                 result++;
 346
 347                 return result;
 348         }
 349
 350         public String getPackageName() {
 351
 352                 final int i = fullyQualifiedName.lastIndexOf('.');
 353
 354                 if (i == -1)
 355                         return "";
 356
 357                 return fullyQualifiedName.substring(0, i).replace("[L", "");
 358         }
 359
 360         // public String getReadableName() {
 361         //
 362         // // do not print full class name for well known system classes
 363         // final String packageName = getPackageName();
 364         //
 365         // if (packageName.equals("java.util"))
 366         // return getClassName();
 367         //
 368         // if (packageName.equals("java.lang"))
 369         // return getClassName();
 370         //
 371         // return fullyQualifiedName;
 372         // }
 373
 374         public String getParentClassesName() {
 375                 int i = fullyQualifiedName.lastIndexOf('.');
 376                 final String fullClassName = fullyQualifiedName.substring(i + 1);
 377
 378                 i = fullClassName.lastIndexOf('$');
 379                 if (i == -1)
 380                         return "";
 381                 final String parentClassesName = fullClassName.substring(0, i);
 382                 return parentClassesName.replace('$', '.');
 383         }
 384
 385         public String getSuperClassColor() {
 386                 if (superClassColor == null)
 387                         superClassColor = Utils.getNextLightColor();
 388
 389                 return superClassColor;
 390         }
 391
 392         public void hide() {
 393                 isShown = false;
 394         }
 395
 396         public void hideClassIfNoReferences() {
 397                 if (!isVisible())
 398                         return;
 399
 400                 final int totalReferencesCount = getOutgoingReferencesCount()
 401                                 + referencesCount + extensionsCount + implementationsCount;
 402
 403                 if (totalReferencesCount == 0) {
 404                         hide();
 405                         return;
 406                 }
 407
 408                 return;
 409         }
 410
 411         public void indexFields(final Field[] fields) {
 412                 for (final Field field : fields) {
 413                         if (nameToFieldMap.containsKey(field.getName()))
 414                                 continue;
 415
 416                         final FieldDescriptor fieldDescriptor = new FieldDescriptor(field,
 417                                         this, classGraph);
 418
 419                 }
 420         }
 421
 422         private void indexMethods(final Class<? extends Object> clazz) {
 423                 final Method[] methods = clazz.getMethods();
 424
 425                 for (final Method method : methods)
 426                         new MethodDescriptor(method, this, classGraph);
 427
 428         }
 429
 430         @Override
 431         public boolean isVisible() {
 432
 433                 if (Utils.isSystemDataType(fullyQualifiedName))
 434                         return false;
 435
 436                 if (Utils.isSystemPackage(fullyQualifiedName))
 437                         return false;
 438
 439                 if (!classGraph.getFilter().isClassShown(fullyQualifiedName))
 440                         return false;
 441
 442                 return isShown;
 443         }
 444
 445         /**
 446          * Register event when another class is extending this one.
 447          */
 448         public void registerExtension() {
 449                 extensionsCount++;
 450         }
 451
 452         public void registerImplementation() {
 453                 implementationsCount++;
 454         }
 455
 456         public void registerReference() {
 457                 referencesCount++;
 458         }
 459
 460         public void setDistinctiveColor(final String distinctiveColor) {
 461                 distinctiveReferenceColor = distinctiveColor;
 462         }
 463 }